-- (c) The University of Glasgow, 2006

{-# LANGUAGE LambdaCase #-}

-- | Unit manipulation
module GHC.Unit.State (
        module GHC.Unit.Info,

        -- * Reading the package config, and processing cmdline args
        UnitState(..),
        PreloadUnitClosure,
        UnitDatabase (..),
        UnitErr (..),
        emptyUnitState,
        initUnits,
        readUnitDatabases,
        readUnitDatabase,
        getUnitDbRefs,
        resolveUnitDatabase,
        listUnitInfo,

        -- * Querying the package config
        UnitInfoMap,
        lookupUnit,
        lookupUnit',
        unsafeLookupUnit,
        lookupUnitId,
        lookupUnitId',
        unsafeLookupUnitId,

        lookupPackageName,
        resolvePackageImport,
        improveUnit,
        searchPackageId,
        listVisibleModuleNames,
        lookupModuleInAllUnits,
        lookupModuleWithSuggestions,
        lookupModulePackage,
        lookupPluginModuleWithSuggestions,
        requirementMerges,
        LookupResult(..),
        ModuleSuggestion(..),
        ModuleOrigin(..),
        UnusableUnit(..),
        UnusableUnitReason(..),
        pprReason,

        closeUnitDeps,
        closeUnitDeps',
        mayThrowUnitErr,

        -- * Module hole substitution
        ShHoleSubst,
        renameHoleUnit,
        renameHoleModule,
        renameHoleUnit',
        renameHoleModule',
        instUnitToUnit,
        instModuleToModule,

        -- * Pretty-printing
        pprFlag,
        pprUnits,
        pprUnitsSimple,
        pprUnitIdForUser,
        pprUnitInfoForUser,
        pprModuleMap,
        pprWithUnitState,

        -- * Utils
        unwireUnit)
where

import GHC.Prelude

import GHC.Driver.DynFlags

import GHC.Platform
import GHC.Platform.Ways

import GHC.Unit.Database
import GHC.Unit.Info
import GHC.Unit.Ppr
import GHC.Unit.Types
import GHC.Unit.Module
import GHC.Unit.Home

import GHC.Types.Unique.FM
import GHC.Types.Unique.DFM
import GHC.Types.Unique.Set
import GHC.Types.Unique.DSet
import GHC.Types.Unique.Map
import GHC.Types.Unique
import GHC.Types.PkgQual

import GHC.Utils.Misc
import GHC.Utils.Panic
import GHC.Utils.Outputable as Outputable
import GHC.Data.Maybe

import System.Environment ( getEnv )
import GHC.Data.FastString
import qualified GHC.Data.ShortText as ST
import GHC.Utils.Logger
import GHC.Utils.Error
import GHC.Utils.Exception

import System.Directory
import System.FilePath as FilePath
import Control.Monad
import Data.Graph (stronglyConnComp, SCC(..))
import Data.Char ( toUpper )
import Data.List ( intersperse, partition, sortBy, isSuffixOf, sortOn )
import Data.Set (Set)
import Data.Monoid (First(..))
import qualified Data.Semigroup as Semigroup
import qualified Data.Set as Set
import Control.Applicative

-- ---------------------------------------------------------------------------
-- The Unit state

-- The unit state is computed by 'initUnits', and kept in HscEnv.
-- It is influenced by various command-line flags:
--
--   * @-package \<pkg>@ and @-package-id \<pkg>@ cause @\<pkg>@ to become exposed.
--     If @-hide-all-packages@ was not specified, these commands also cause
--      all other packages with the same name to become hidden.
--
--   * @-hide-package \<pkg>@ causes @\<pkg>@ to become hidden.
--
--   * (there are a few more flags, check below for their semantics)
--
-- The unit state has the following properties.
--
--   * Let @exposedUnits@ be the set of packages thus exposed.
--     Let @depExposedUnits@ be the transitive closure from @exposedUnits@ of
--     their dependencies.
--
--   * When searching for a module from a preload import declaration,
--     only the exposed modules in @exposedUnits@ are valid.
--
--   * When searching for a module from an implicit import, all modules
--     from @depExposedUnits@ are valid.
--
--   * When linking in a compilation manager mode, we link in packages the
--     program depends on (the compiler knows this list by the
--     time it gets to the link step).  Also, we link in all packages
--     which were mentioned with preload @-package@ flags on the command-line,
--     or are a transitive dependency of same, or are \"base\"\/\"rts\".
--     The reason for this is that we might need packages which don't
--     contain any Haskell modules, and therefore won't be discovered
--     by the normal mechanism of dependency tracking.

-- Notes on DLLs
-- ~~~~~~~~~~~~~
-- When compiling module A, which imports module B, we need to
-- know whether B will be in the same DLL as A.
--      If it's in the same DLL, we refer to B_f_closure
--      If it isn't, we refer to _imp__B_f_closure
-- When compiling A, we record in B's Module value whether it's
-- in a different DLL, by setting the DLL flag.

-- | Given a module name, there may be multiple ways it came into scope,
-- possibly simultaneously.  This data type tracks all the possible ways
-- it could have come into scope.  Warning: don't use the record functions,
-- they're partial!
data ModuleOrigin =
    -- | Module is hidden, and thus never will be available for import.
    -- (But maybe the user didn't realize), so we'll still keep track
    -- of these modules.)
    ModHidden

    -- | Module is unavailable because the unit is unusable.
  | ModUnusable !UnusableUnit

    -- | Module is public, and could have come from some places.
  | ModOrigin {
        -- | @Just False@ means that this module is in
        -- someone's @exported-modules@ list, but that package is hidden;
        -- @Just True@ means that it is available; @Nothing@ means neither
        -- applies.
        ModuleOrigin -> Maybe Bool
fromOrigUnit :: Maybe Bool
        -- | Is the module available from a reexport of an exposed package?
        -- There could be multiple.
      , ModuleOrigin -> [UnitInfo]
fromExposedReexport :: [UnitInfo]
        -- | Is the module available from a reexport of a hidden package?
      , ModuleOrigin -> [UnitInfo]
fromHiddenReexport :: [UnitInfo]
        -- | Did the module export come from a package flag? (ToDo: track
        -- more information.
      , ModuleOrigin -> Bool
fromPackageFlag :: Bool
      }

-- | A unusable unit module origin
data UnusableUnit = UnusableUnit
  { UnusableUnit -> Unit
uuUnit        :: !Unit               -- ^ Unusable unit
  , UnusableUnit -> UnusableUnitReason
uuReason      :: !UnusableUnitReason -- ^ Reason
  , UnusableUnit -> Bool
uuIsReexport  :: !Bool               -- ^ Is the "module" a reexport?
  }

instance Outputable ModuleOrigin where
    ppr :: ModuleOrigin -> SDoc
ppr ModuleOrigin
ModHidden = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"hidden module"
    ppr (ModUnusable UnusableUnit
_) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"unusable module"
    ppr (ModOrigin Maybe Bool
e [UnitInfo]
res [UnitInfo]
rhs Bool
f) = [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep (SDoc -> [SDoc] -> [SDoc]
forall doc. IsLine doc => doc -> [doc] -> [doc]
punctuate SDoc
forall doc. IsLine doc => doc
comma (
        (case Maybe Bool
e of
            Maybe Bool
Nothing -> []
            Just Bool
False -> [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"hidden package"]
            Just Bool
True -> [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"exposed package"]) [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++
        (if [UnitInfo] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [UnitInfo]
res
            then []
            else [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"reexport by" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
                    [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep ((UnitInfo -> SDoc) -> [UnitInfo] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Unit -> SDoc) -> (UnitInfo -> Unit) -> UnitInfo -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfo -> Unit
mkUnit) [UnitInfo]
res)]) [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++
        (if [UnitInfo] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [UnitInfo]
rhs
            then []
            else [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"hidden reexport by" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
                    [SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
sep ((UnitInfo -> SDoc) -> [UnitInfo] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Unit -> SDoc) -> (UnitInfo -> Unit) -> UnitInfo -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfo -> Unit
mkUnit) [UnitInfo]
res)]) [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++
        (if Bool
f then [String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"package flag"] else [])
        ))

-- | Smart constructor for a module which is in @exposed-modules@.  Takes
-- as an argument whether or not the defining package is exposed.
fromExposedModules :: Bool -> ModuleOrigin
fromExposedModules :: Bool -> ModuleOrigin
fromExposedModules Bool
e = Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin (Bool -> Maybe Bool
forall a. a -> Maybe a
Just Bool
e) [] [] Bool
False

-- | Smart constructor for a module which is in @reexported-modules@.  Takes
-- as an argument whether or not the reexporting package is exposed, and
-- also its 'UnitInfo'.
fromReexportedModules :: Bool -> UnitInfo -> ModuleOrigin
fromReexportedModules :: Bool -> UnitInfo -> ModuleOrigin
fromReexportedModules Bool
True UnitInfo
pkg = Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin Maybe Bool
forall a. Maybe a
Nothing [UnitInfo
pkg] [] Bool
False
fromReexportedModules Bool
False UnitInfo
pkg = Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin Maybe Bool
forall a. Maybe a
Nothing [] [UnitInfo
pkg] Bool
False

-- | Smart constructor for a module which was bound by a package flag.
fromFlag :: ModuleOrigin
fromFlag :: ModuleOrigin
fromFlag = Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin Maybe Bool
forall a. Maybe a
Nothing [] [] Bool
True

instance Semigroup ModuleOrigin where
    x :: ModuleOrigin
x@(ModOrigin Maybe Bool
e [UnitInfo]
res [UnitInfo]
rhs Bool
f) <> :: ModuleOrigin -> ModuleOrigin -> ModuleOrigin
<> y :: ModuleOrigin
y@(ModOrigin Maybe Bool
e' [UnitInfo]
res' [UnitInfo]
rhs' Bool
f') =
        Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin (Maybe Bool -> Maybe Bool -> Maybe Bool
g Maybe Bool
e Maybe Bool
e') ([UnitInfo]
res [UnitInfo] -> [UnitInfo] -> [UnitInfo]
forall a. [a] -> [a] -> [a]
++ [UnitInfo]
res') ([UnitInfo]
rhs [UnitInfo] -> [UnitInfo] -> [UnitInfo]
forall a. [a] -> [a] -> [a]
++ [UnitInfo]
rhs') (Bool
f Bool -> Bool -> Bool
|| Bool
f')
      where g :: Maybe Bool -> Maybe Bool -> Maybe Bool
g (Just Bool
b) (Just Bool
b')
                | Bool
b Bool -> Bool -> Bool
forall a. Eq a => a -> a -> Bool
== Bool
b'   = Bool -> Maybe Bool
forall a. a -> Maybe a
Just Bool
b
                | Bool
otherwise = String -> SDoc -> Maybe Bool
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"ModOrigin: package both exposed/hidden" (SDoc -> Maybe Bool) -> SDoc -> Maybe Bool
forall a b. (a -> b) -> a -> b
$
                    String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"x: " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> ModuleOrigin -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleOrigin
x SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"y: " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> ModuleOrigin -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleOrigin
y
            g Maybe Bool
Nothing Maybe Bool
x = Maybe Bool
x
            g Maybe Bool
x Maybe Bool
Nothing = Maybe Bool
x

    ModuleOrigin
x <> ModuleOrigin
y = String -> SDoc -> ModuleOrigin
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"ModOrigin: module origin mismatch" (SDoc -> ModuleOrigin) -> SDoc -> ModuleOrigin
forall a b. (a -> b) -> a -> b
$
                 String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"x: " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> ModuleOrigin -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleOrigin
x SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"y: " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> ModuleOrigin -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleOrigin
y

instance Monoid ModuleOrigin where
    mempty :: ModuleOrigin
mempty = Maybe Bool -> [UnitInfo] -> [UnitInfo] -> Bool -> ModuleOrigin
ModOrigin Maybe Bool
forall a. Maybe a
Nothing [] [] Bool
False
    mappend :: ModuleOrigin -> ModuleOrigin -> ModuleOrigin
mappend = ModuleOrigin -> ModuleOrigin -> ModuleOrigin
forall a. Semigroup a => a -> a -> a
(Semigroup.<>)

-- | Is the name from the import actually visible? (i.e. does it cause
-- ambiguity, or is it only relevant when we're making suggestions?)
originVisible :: ModuleOrigin -> Bool
originVisible :: ModuleOrigin -> Bool
originVisible ModuleOrigin
ModHidden = Bool
False
originVisible (ModUnusable UnusableUnit
_) = Bool
False
originVisible (ModOrigin Maybe Bool
b [UnitInfo]
res [UnitInfo]
_ Bool
f) = Maybe Bool
b Maybe Bool -> Maybe Bool -> Bool
forall a. Eq a => a -> a -> Bool
== Bool -> Maybe Bool
forall a. a -> Maybe a
Just Bool
True Bool -> Bool -> Bool
|| Bool -> Bool
not ([UnitInfo] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [UnitInfo]
res) Bool -> Bool -> Bool
|| Bool
f

-- | Are there actually no providers for this module?  This will never occur
-- except when we're filtering based on package imports.
originEmpty :: ModuleOrigin -> Bool
originEmpty :: ModuleOrigin -> Bool
originEmpty (ModOrigin Maybe Bool
Nothing [] [] Bool
False) = Bool
True
originEmpty ModuleOrigin
_ = Bool
False

type PreloadUnitClosure = UniqSet UnitId

-- | 'UniqFM' map from 'Unit' to a 'UnitVisibility'.
type VisibilityMap = UniqMap Unit UnitVisibility

-- | 'UnitVisibility' records the various aspects of visibility of a particular
-- 'Unit'.
data UnitVisibility = UnitVisibility
    { UnitVisibility -> Bool
uv_expose_all :: Bool
      --  ^ Should all modules in exposed-modules should be dumped into scope?
    , UnitVisibility -> [(ModuleName, ModuleName)]
uv_renamings :: [(ModuleName, ModuleName)]
      -- ^ Any custom renamings that should bring extra 'ModuleName's into
      -- scope.
    , UnitVisibility -> First FastString
uv_package_name :: First FastString
      -- ^ The package name associated with the 'Unit'.  This is used
      -- to implement legacy behavior where @-package foo-0.1@ implicitly
      -- hides any packages named @foo@
    , UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule)
uv_requirements :: UniqMap ModuleName (Set InstantiatedModule)
      -- ^ The signatures which are contributed to the requirements context
      -- from this unit ID.
    , UnitVisibility -> Maybe PackageArg
uv_explicit :: Maybe PackageArg
      -- ^ Whether or not this unit was explicitly brought into scope,
      -- as opposed to implicitly via the 'exposed' fields in the
      -- package database (when @-hide-all-packages@ is not passed.)
    }

instance Outputable UnitVisibility where
    ppr :: UnitVisibility -> SDoc
ppr (UnitVisibility {
        uv_expose_all :: UnitVisibility -> Bool
uv_expose_all = Bool
b,
        uv_renamings :: UnitVisibility -> [(ModuleName, ModuleName)]
uv_renamings = [(ModuleName, ModuleName)]
rns,
        uv_package_name :: UnitVisibility -> First FastString
uv_package_name = First Maybe FastString
mb_pn,
        uv_requirements :: UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule)
uv_requirements = UniqMap ModuleName (Set InstantiatedModule)
reqs,
        uv_explicit :: UnitVisibility -> Maybe PackageArg
uv_explicit = Maybe PackageArg
explicit
    }) = (Bool, [(ModuleName, ModuleName)], Maybe FastString,
 UniqMap ModuleName (Set InstantiatedModule), Maybe PackageArg)
-> SDoc
forall a. Outputable a => a -> SDoc
ppr (Bool
b, [(ModuleName, ModuleName)]
rns, Maybe FastString
mb_pn, UniqMap ModuleName (Set InstantiatedModule)
reqs, Maybe PackageArg
explicit)

instance Semigroup UnitVisibility where
    UnitVisibility
uv1 <> :: UnitVisibility -> UnitVisibility -> UnitVisibility
<> UnitVisibility
uv2
        = UnitVisibility
          { uv_expose_all :: Bool
uv_expose_all = UnitVisibility -> Bool
uv_expose_all UnitVisibility
uv1 Bool -> Bool -> Bool
|| UnitVisibility -> Bool
uv_expose_all UnitVisibility
uv2
          , uv_renamings :: [(ModuleName, ModuleName)]
uv_renamings = UnitVisibility -> [(ModuleName, ModuleName)]
uv_renamings UnitVisibility
uv1 [(ModuleName, ModuleName)]
-> [(ModuleName, ModuleName)] -> [(ModuleName, ModuleName)]
forall a. [a] -> [a] -> [a]
++ UnitVisibility -> [(ModuleName, ModuleName)]
uv_renamings UnitVisibility
uv2
          , uv_package_name :: First FastString
uv_package_name = First FastString -> First FastString -> First FastString
forall a. Monoid a => a -> a -> a
mappend (UnitVisibility -> First FastString
uv_package_name UnitVisibility
uv1) (UnitVisibility -> First FastString
uv_package_name UnitVisibility
uv2)
          , uv_requirements :: UniqMap ModuleName (Set InstantiatedModule)
uv_requirements = (Set InstantiatedModule
 -> Set InstantiatedModule -> Set InstantiatedModule)
-> UniqMap ModuleName (Set InstantiatedModule)
-> UniqMap ModuleName (Set InstantiatedModule)
-> UniqMap ModuleName (Set InstantiatedModule)
forall a k.
(a -> a -> a) -> UniqMap k a -> UniqMap k a -> UniqMap k a
plusUniqMap_C Set InstantiatedModule
-> Set InstantiatedModule -> Set InstantiatedModule
forall a. Ord a => Set a -> Set a -> Set a
Set.union (UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule)
uv_requirements UnitVisibility
uv2) (UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule)
uv_requirements UnitVisibility
uv1)
          , uv_explicit :: Maybe PackageArg
uv_explicit = UnitVisibility -> Maybe PackageArg
uv_explicit UnitVisibility
uv1 Maybe PackageArg -> Maybe PackageArg -> Maybe PackageArg
forall a. Maybe a -> Maybe a -> Maybe a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> UnitVisibility -> Maybe PackageArg
uv_explicit UnitVisibility
uv2
          }

instance Monoid UnitVisibility where
    mempty :: UnitVisibility
mempty = UnitVisibility
             { uv_expose_all :: Bool
uv_expose_all = Bool
False
             , uv_renamings :: [(ModuleName, ModuleName)]
uv_renamings = []
             , uv_package_name :: First FastString
uv_package_name = Maybe FastString -> First FastString
forall a. Maybe a -> First a
First Maybe FastString
forall a. Maybe a
Nothing
             , uv_requirements :: UniqMap ModuleName (Set InstantiatedModule)
uv_requirements = UniqMap ModuleName (Set InstantiatedModule)
forall k a. UniqMap k a
emptyUniqMap
             , uv_explicit :: Maybe PackageArg
uv_explicit = Maybe PackageArg
forall a. Maybe a
Nothing
             }
    mappend :: UnitVisibility -> UnitVisibility -> UnitVisibility
mappend = UnitVisibility -> UnitVisibility -> UnitVisibility
forall a. Semigroup a => a -> a -> a
(Semigroup.<>)


-- | Unit configuration
data UnitConfig = UnitConfig
   { UnitConfig -> ArchOS
unitConfigPlatformArchOS :: !ArchOS        -- ^ Platform arch and OS
   , UnitConfig -> Ways
unitConfigWays           :: !Ways          -- ^ Ways to use

   , UnitConfig -> Bool
unitConfigAllowVirtual   :: !Bool          -- ^ Allow virtual units
      -- ^ Do we allow the use of virtual units instantiated on-the-fly (see
      -- Note [About units] in GHC.Unit). This should only be true when we are
      -- type-checking an indefinite unit (not producing any code).

   , UnitConfig -> String
unitConfigProgramName    :: !String
      -- ^ Name of the compiler (e.g. "GHC", "GHCJS"). Used to fetch environment
      -- variables such as "GHC[JS]_PACKAGE_PATH".

   , UnitConfig -> String
unitConfigGlobalDB :: !FilePath    -- ^ Path to global DB
   , UnitConfig -> String
unitConfigGHCDir   :: !FilePath    -- ^ Main GHC dir: contains settings, etc.
   , UnitConfig -> String
unitConfigDBName   :: !String      -- ^ User DB name (e.g. "package.conf.d")

   , UnitConfig -> [UnitId]
unitConfigAutoLink       :: ![UnitId] -- ^ Units to link automatically (e.g. base, rts)
   , UnitConfig -> Bool
unitConfigDistrustAll    :: !Bool     -- ^ Distrust all units by default
   , UnitConfig -> Bool
unitConfigHideAll        :: !Bool     -- ^ Hide all units by default
   , UnitConfig -> Bool
unitConfigHideAllPlugins :: !Bool     -- ^ Hide all plugins units by default

   , UnitConfig -> Maybe [UnitDatabase UnitId]
unitConfigDBCache      :: Maybe [UnitDatabase UnitId]
      -- ^ Cache of databases to use, in the order they were specified on the
      -- command line (later databases shadow earlier ones).
      -- If Nothing, databases will be found using `unitConfigFlagsDB`.

   -- command-line flags
   , UnitConfig -> [PackageDBFlag]
unitConfigFlagsDB      :: [PackageDBFlag]     -- ^ Unit databases flags
   , UnitConfig -> [PackageFlag]
unitConfigFlagsExposed :: [PackageFlag]       -- ^ Exposed units
   , UnitConfig -> [IgnorePackageFlag]
unitConfigFlagsIgnored :: [IgnorePackageFlag] -- ^ Ignored units
   , UnitConfig -> [TrustFlag]
unitConfigFlagsTrusted :: [TrustFlag]         -- ^ Trusted units
   , UnitConfig -> [PackageFlag]
unitConfigFlagsPlugins :: [PackageFlag]       -- ^ Plugins exposed units
   , UnitConfig -> Set UnitId
unitConfigHomeUnits    :: Set.Set UnitId
   }

initUnitConfig :: DynFlags -> Maybe [UnitDatabase UnitId] -> Set.Set UnitId -> UnitConfig
initUnitConfig :: DynFlags -> Maybe [UnitDatabase UnitId] -> Set UnitId -> UnitConfig
initUnitConfig DynFlags
dflags Maybe [UnitDatabase UnitId]
cached_dbs Set UnitId
home_units =
   let !hu_id :: UnitId
hu_id             = DynFlags -> UnitId
homeUnitId_ DynFlags
dflags
       !hu_instanceof :: Maybe UnitId
hu_instanceof     = DynFlags -> Maybe UnitId
homeUnitInstanceOf_ DynFlags
dflags
       !hu_instantiations :: [(ModuleName, Module)]
hu_instantiations = DynFlags -> [(ModuleName, Module)]
homeUnitInstantiations_ DynFlags
dflags

       autoLink :: [UnitId]
autoLink
         | Bool -> Bool
not (GeneralFlag -> DynFlags -> Bool
gopt GeneralFlag
Opt_AutoLinkPackages DynFlags
dflags) = []
         -- By default we add ghc-internal & rts to the preload units (when they are
         -- found in the unit database) except when we are building them
         | Bool
otherwise = (UnitId -> Bool) -> [UnitId] -> [UnitId]
forall a. (a -> Bool) -> [a] -> [a]
filter (UnitId
hu_id UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
/=) [UnitId
ghcInternalUnitId, UnitId
rtsUnitId]

       -- if the home unit is indefinite, it means we are type-checking it only
       -- (not producing any code). Hence we can use virtual units instantiated
       -- on-the-fly. See Note [About units] in GHC.Unit
       allow_virtual_units :: Bool
allow_virtual_units = case (Maybe UnitId
hu_instanceof, [(ModuleName, Module)]
hu_instantiations) of
            (Just UnitId
u, [(ModuleName, Module)]
is) -> UnitId
u UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitId
hu_id Bool -> Bool -> Bool
&& ((ModuleName, Module) -> Bool) -> [(ModuleName, Module)] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any (Module -> Bool
forall u. GenModule (GenUnit u) -> Bool
isHoleModule (Module -> Bool)
-> ((ModuleName, Module) -> Module) -> (ModuleName, Module) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (ModuleName, Module) -> Module
forall a b. (a, b) -> b
snd) [(ModuleName, Module)]
is
            (Maybe UnitId, [(ModuleName, Module)])
_            -> Bool
False

   in UnitConfig
      { unitConfigPlatformArchOS :: ArchOS
unitConfigPlatformArchOS = Platform -> ArchOS
platformArchOS (DynFlags -> Platform
targetPlatform DynFlags
dflags)
      , unitConfigProgramName :: String
unitConfigProgramName    = DynFlags -> String
programName DynFlags
dflags
      , unitConfigWays :: Ways
unitConfigWays           = DynFlags -> Ways
ways DynFlags
dflags
      , unitConfigAllowVirtual :: Bool
unitConfigAllowVirtual   = Bool
allow_virtual_units

      , unitConfigGlobalDB :: String
unitConfigGlobalDB       = DynFlags -> String
globalPackageDatabasePath DynFlags
dflags
      , unitConfigGHCDir :: String
unitConfigGHCDir         = DynFlags -> String
topDir DynFlags
dflags
      , unitConfigDBName :: String
unitConfigDBName         = String
"package.conf.d"

      , unitConfigAutoLink :: [UnitId]
unitConfigAutoLink       = [UnitId]
autoLink
      , unitConfigDistrustAll :: Bool
unitConfigDistrustAll    = GeneralFlag -> DynFlags -> Bool
gopt GeneralFlag
Opt_DistrustAllPackages DynFlags
dflags
      , unitConfigHideAll :: Bool
unitConfigHideAll        = GeneralFlag -> DynFlags -> Bool
gopt GeneralFlag
Opt_HideAllPackages DynFlags
dflags
      , unitConfigHideAllPlugins :: Bool
unitConfigHideAllPlugins = GeneralFlag -> DynFlags -> Bool
gopt GeneralFlag
Opt_HideAllPluginPackages DynFlags
dflags

      , unitConfigDBCache :: Maybe [UnitDatabase UnitId]
unitConfigDBCache      = Maybe [UnitDatabase UnitId]
cached_dbs
      , unitConfigFlagsDB :: [PackageDBFlag]
unitConfigFlagsDB      = (PackageDBFlag -> PackageDBFlag)
-> [PackageDBFlag] -> [PackageDBFlag]
forall a b. (a -> b) -> [a] -> [b]
map (Maybe String -> PackageDBFlag -> PackageDBFlag
offsetPackageDb (DynFlags -> Maybe String
workingDirectory DynFlags
dflags)) ([PackageDBFlag] -> [PackageDBFlag])
-> [PackageDBFlag] -> [PackageDBFlag]
forall a b. (a -> b) -> a -> b
$ DynFlags -> [PackageDBFlag]
packageDBFlags DynFlags
dflags
      , unitConfigFlagsExposed :: [PackageFlag]
unitConfigFlagsExposed = DynFlags -> [PackageFlag]
packageFlags DynFlags
dflags
      , unitConfigFlagsIgnored :: [IgnorePackageFlag]
unitConfigFlagsIgnored = DynFlags -> [IgnorePackageFlag]
ignorePackageFlags DynFlags
dflags
      , unitConfigFlagsTrusted :: [TrustFlag]
unitConfigFlagsTrusted = DynFlags -> [TrustFlag]
trustFlags DynFlags
dflags
      , unitConfigFlagsPlugins :: [PackageFlag]
unitConfigFlagsPlugins = DynFlags -> [PackageFlag]
pluginPackageFlags DynFlags
dflags
      , unitConfigHomeUnits :: Set UnitId
unitConfigHomeUnits    = Set UnitId
home_units

      }

  where
    offsetPackageDb :: Maybe FilePath -> PackageDBFlag -> PackageDBFlag
    offsetPackageDb :: Maybe String -> PackageDBFlag -> PackageDBFlag
offsetPackageDb (Just String
offset) (PackageDB (PkgDbPath String
p)) | String -> Bool
isRelative String
p = PkgDbRef -> PackageDBFlag
PackageDB (String -> PkgDbRef
PkgDbPath (String
offset String -> String -> String
</> String
p))
    offsetPackageDb Maybe String
_ PackageDBFlag
p = PackageDBFlag
p


-- | Map from 'ModuleName' to a set of module providers (i.e. a 'Module' and
-- its 'ModuleOrigin').
--
-- NB: the set is in fact a 'Map Module ModuleOrigin', probably to keep only one
-- origin for a given 'Module'

type ModuleNameProvidersMap =
    UniqMap ModuleName (UniqMap Module ModuleOrigin)

data UnitState = UnitState {
  -- | A mapping of 'Unit' to 'UnitInfo'.  This list is adjusted
  -- so that only valid units are here.  'UnitInfo' reflects
  -- what was stored *on disk*, except for the 'trusted' flag, which
  -- is adjusted at runtime.  (In particular, some units in this map
  -- may have the 'exposed' flag be 'False'.)
  UnitState -> UnitInfoMap
unitInfoMap :: UnitInfoMap,

  -- | The set of transitively reachable units according
  -- to the explicitly provided command line arguments.
  -- A fully instantiated VirtUnit may only be replaced by a RealUnit from
  -- this set.
  -- See Note [VirtUnit to RealUnit improvement]
  UnitState -> PreloadUnitClosure
preloadClosure :: PreloadUnitClosure,

  -- | A mapping of 'PackageName' to 'UnitId'. If several units have the same
  -- package name (e.g. different instantiations), then we return one of them...
  -- This is used when users refer to packages in Backpack includes.
  -- And also to resolve package qualifiers with the PackageImports extension.
  UnitState -> UniqFM PackageName UnitId
packageNameMap            :: UniqFM PackageName UnitId,

  -- | A mapping from database unit keys to wired in unit ids.
  UnitState -> UniqMap UnitId UnitId
wireMap :: UniqMap UnitId UnitId,

  -- | A mapping from wired in unit ids to unit keys from the database.
  UnitState -> UniqMap UnitId UnitId
unwireMap :: UniqMap UnitId UnitId,

  -- | The units we're going to link in eagerly.  This list
  -- should be in reverse dependency order; that is, a unit
  -- is always mentioned before the units it depends on.
  UnitState -> [UnitId]
preloadUnits      :: [UnitId],

  -- | Units which we explicitly depend on (from a command line flag).
  -- We'll use this to generate version macros and the unused packages warning. The
  -- original flag which was used to bring the unit into scope is recorded for the
  -- -Wunused-packages warning.
  UnitState -> [(Unit, Maybe PackageArg)]
explicitUnits :: [(Unit, Maybe PackageArg)],

  UnitState -> [UnitId]
homeUnitDepends    :: [UnitId],

  -- | This is a full map from 'ModuleName' to all modules which may possibly
  -- be providing it.  These providers may be hidden (but we'll still want
  -- to report them in error messages), or it may be an ambiguous import.
  UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap    :: !ModuleNameProvidersMap,

  -- | A map, like 'moduleNameProvidersMap', but controlling plugin visibility.
  UnitState -> ModuleNameProvidersMap
pluginModuleNameProvidersMap    :: !ModuleNameProvidersMap,

  -- | A map saying, for each requirement, what interfaces must be merged
  -- together when we use them.  For example, if our dependencies
  -- are @p[A=\<A>]@ and @q[A=\<A>,B=r[C=\<A>]:B]@, then the interfaces
  -- to merge for A are @p[A=\<A>]:A@, @q[A=\<A>,B=r[C=\<A>]:B]:A@
  -- and @r[C=\<A>]:C@.
  --
  -- There's an entry in this map for each hole in our home library.
  UnitState -> UniqMap ModuleName [InstantiatedModule]
requirementContext :: UniqMap ModuleName [InstantiatedModule],

  -- | Indicate if we can instantiate units on-the-fly.
  --
  -- This should only be true when we are type-checking an indefinite unit.
  -- See Note [About units] in GHC.Unit.
  UnitState -> Bool
allowVirtualUnits :: !Bool
  }

emptyUnitState :: UnitState
emptyUnitState :: UnitState
emptyUnitState = UnitState {
    unitInfoMap :: UnitInfoMap
unitInfoMap    = UnitInfoMap
forall k a. UniqMap k a
emptyUniqMap,
    preloadClosure :: PreloadUnitClosure
preloadClosure = PreloadUnitClosure
forall a. UniqSet a
emptyUniqSet,
    packageNameMap :: UniqFM PackageName UnitId
packageNameMap = UniqFM PackageName UnitId
forall {k} (key :: k) elt. UniqFM key elt
emptyUFM,
    wireMap :: UniqMap UnitId UnitId
wireMap        = UniqMap UnitId UnitId
forall k a. UniqMap k a
emptyUniqMap,
    unwireMap :: UniqMap UnitId UnitId
unwireMap      = UniqMap UnitId UnitId
forall k a. UniqMap k a
emptyUniqMap,
    preloadUnits :: [UnitId]
preloadUnits   = [],
    explicitUnits :: [(Unit, Maybe PackageArg)]
explicitUnits  = [],
    homeUnitDepends :: [UnitId]
homeUnitDepends = [],
    moduleNameProvidersMap :: ModuleNameProvidersMap
moduleNameProvidersMap       = ModuleNameProvidersMap
forall k a. UniqMap k a
emptyUniqMap,
    pluginModuleNameProvidersMap :: ModuleNameProvidersMap
pluginModuleNameProvidersMap = ModuleNameProvidersMap
forall k a. UniqMap k a
emptyUniqMap,
    requirementContext :: UniqMap ModuleName [InstantiatedModule]
requirementContext           = UniqMap ModuleName [InstantiatedModule]
forall k a. UniqMap k a
emptyUniqMap,
    allowVirtualUnits :: Bool
allowVirtualUnits = Bool
False
    }

-- | Unit database
data UnitDatabase unit = UnitDatabase
   { forall unit. UnitDatabase unit -> String
unitDatabasePath  :: FilePath
   , forall unit. UnitDatabase unit -> [GenUnitInfo unit]
unitDatabaseUnits :: [GenUnitInfo unit]
   }

instance Outputable u => Outputable (UnitDatabase u) where
  ppr :: UnitDatabase u -> SDoc
ppr (UnitDatabase String
fp [GenUnitInfo u]
_u) = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"DB:" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
fp

type UnitInfoMap = UniqMap UnitId UnitInfo

-- | Find the unit we know about with the given unit, if any
lookupUnit :: UnitState -> Unit -> Maybe UnitInfo
lookupUnit :: UnitState -> Unit -> Maybe UnitInfo
lookupUnit UnitState
pkgs = Bool -> UnitInfoMap -> PreloadUnitClosure -> Unit -> Maybe UnitInfo
lookupUnit' (UnitState -> Bool
allowVirtualUnits UnitState
pkgs) (UnitState -> UnitInfoMap
unitInfoMap UnitState
pkgs) (UnitState -> PreloadUnitClosure
preloadClosure UnitState
pkgs)

-- | A more specialized interface, which doesn't require a 'UnitState' (so it
-- can be used while we're initializing 'DynFlags')
--
-- Parameters:
--    * a boolean specifying whether or not to look for on-the-fly renamed interfaces
--    * a 'UnitInfoMap'
--    * a 'PreloadUnitClosure'
lookupUnit' :: Bool -> UnitInfoMap -> PreloadUnitClosure -> Unit -> Maybe UnitInfo
lookupUnit' :: Bool -> UnitInfoMap -> PreloadUnitClosure -> Unit -> Maybe UnitInfo
lookupUnit' Bool
allowOnTheFlyInst UnitInfoMap
pkg_map PreloadUnitClosure
closure Unit
u = case Unit
u of
   Unit
HoleUnit   -> String -> Maybe UnitInfo
forall a. HasCallStack => String -> a
error String
"Hole unit"
   RealUnit Definite UnitId
i -> UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
pkg_map (Definite UnitId -> UnitId
forall unit. Definite unit -> unit
unDefinite Definite UnitId
i)
   VirtUnit GenInstantiatedUnit UnitId
i
      | Bool
allowOnTheFlyInst
      -> -- lookup UnitInfo of the indefinite unit to be instantiated and
         -- instantiate it on-the-fly
         (UnitInfo -> UnitInfo) -> Maybe UnitInfo -> Maybe UnitInfo
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (UnitInfoMap
-> PreloadUnitClosure
-> [(ModuleName, Module)]
-> UnitInfo
-> UnitInfo
renameUnitInfo UnitInfoMap
pkg_map PreloadUnitClosure
closure (GenInstantiatedUnit UnitId -> [(ModuleName, Module)]
forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts GenInstantiatedUnit UnitId
i))
           (UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
pkg_map (GenInstantiatedUnit UnitId -> UnitId
forall unit. GenInstantiatedUnit unit -> unit
instUnitInstanceOf GenInstantiatedUnit UnitId
i))

      | Bool
otherwise
      -> -- lookup UnitInfo by virtual UnitId. This is used to find indefinite
         -- units. Even if they are real, installed units, they can't use the
         -- `RealUnit` constructor (it is reserved for definite units) so we use
         -- the `VirtUnit` constructor.
         UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
pkg_map (GenInstantiatedUnit UnitId -> UnitId
virtualUnitId GenInstantiatedUnit UnitId
i)

-- | Find the unit we know about with the given unit id, if any
lookupUnitId :: UnitState -> UnitId -> Maybe UnitInfo
lookupUnitId :: UnitState -> UnitId -> Maybe UnitInfo
lookupUnitId UnitState
state UnitId
uid = UnitInfoMap -> UnitId -> Maybe UnitInfo
lookupUnitId' (UnitState -> UnitInfoMap
unitInfoMap UnitState
state) UnitId
uid

-- | Find the unit we know about with the given unit id, if any
lookupUnitId' :: UnitInfoMap -> UnitId -> Maybe UnitInfo
lookupUnitId' :: UnitInfoMap -> UnitId -> Maybe UnitInfo
lookupUnitId' UnitInfoMap
db UnitId
uid = UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
db UnitId
uid


-- | Looks up the given unit in the unit state, panicking if it is not found
unsafeLookupUnit :: HasDebugCallStack => UnitState -> Unit -> UnitInfo
unsafeLookupUnit :: HasDebugCallStack => UnitState -> Unit -> UnitInfo
unsafeLookupUnit UnitState
state Unit
u = case UnitState -> Unit -> Maybe UnitInfo
lookupUnit UnitState
state Unit
u of
   Just UnitInfo
info -> UnitInfo
info
   Maybe UnitInfo
Nothing   -> String -> SDoc -> UnitInfo
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"unsafeLookupUnit" (Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr Unit
u)

-- | Looks up the given unit id in the unit state, panicking if it is not found
unsafeLookupUnitId :: HasDebugCallStack => UnitState -> UnitId -> UnitInfo
unsafeLookupUnitId :: HasDebugCallStack => UnitState -> UnitId -> UnitInfo
unsafeLookupUnitId UnitState
state UnitId
uid = case UnitState -> UnitId -> Maybe UnitInfo
lookupUnitId UnitState
state UnitId
uid of
   Just UnitInfo
info -> UnitInfo
info
   Maybe UnitInfo
Nothing   -> String -> SDoc -> UnitInfo
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"unsafeLookupUnitId" (UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
uid)


-- | Find the unit we know about with the given package name (e.g. @foo@), if any
-- (NB: there might be a locally defined unit name which overrides this)
-- This function is unsafe to use in general because it doesn't respect package
-- visibility.
lookupPackageName :: UnitState -> PackageName -> Maybe UnitId
lookupPackageName :: UnitState -> PackageName -> Maybe UnitId
lookupPackageName UnitState
pkgstate PackageName
n = UniqFM PackageName UnitId -> PackageName -> Maybe UnitId
forall key elt. Uniquable key => UniqFM key elt -> key -> Maybe elt
lookupUFM (UnitState -> UniqFM PackageName UnitId
packageNameMap UnitState
pkgstate) PackageName
n

-- | Search for units with a given package ID (e.g. \"foo-0.1\")
searchPackageId :: UnitState -> PackageId -> [UnitInfo]
searchPackageId :: UnitState -> PackageId -> [UnitInfo]
searchPackageId UnitState
pkgstate PackageId
pid = (UnitInfo -> Bool) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> Bool) -> [a] -> [a]
filter ((PackageId
pid PackageId -> PackageId -> Bool
forall a. Eq a => a -> a -> Bool
==) (PackageId -> Bool) -> (UnitInfo -> PackageId) -> UnitInfo -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfo -> PackageId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> srcpkgid
unitPackageId)
                               (UnitState -> [UnitInfo]
listUnitInfo UnitState
pkgstate)

-- | Find the UnitId which an import qualified by a package import comes from.
-- Compared to 'lookupPackageName', this function correctly accounts for visibility,
-- renaming and thinning.
resolvePackageImport :: UnitState -> ModuleName -> PackageName -> Maybe UnitId
resolvePackageImport :: UnitState -> ModuleName -> PackageName -> Maybe UnitId
resolvePackageImport UnitState
unit_st ModuleName
mn PackageName
pn = do
  -- 1. Find all modules providing the ModuleName (this accounts for visibility/thinning etc)
  providers <- (ModuleOrigin -> Bool)
-> UniqMap Module ModuleOrigin -> UniqMap Module ModuleOrigin
forall a k. (a -> Bool) -> UniqMap k a -> UniqMap k a
filterUniqMap ModuleOrigin -> Bool
originVisible (UniqMap Module ModuleOrigin -> UniqMap Module ModuleOrigin)
-> Maybe (UniqMap Module ModuleOrigin)
-> Maybe (UniqMap Module ModuleOrigin)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> ModuleNameProvidersMap
-> ModuleName -> Maybe (UniqMap Module ModuleOrigin)
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap (UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap UnitState
unit_st) ModuleName
mn
  -- 2. Get the UnitIds of the candidates
  let candidates_uid = ((Module, ModuleOrigin) -> [UnitId])
-> [(Module, ModuleOrigin)] -> [UnitId]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap (Module, ModuleOrigin) -> [UnitId]
to_uid ([(Module, ModuleOrigin)] -> [UnitId])
-> [(Module, ModuleOrigin)] -> [UnitId]
forall a b. (a -> b) -> a -> b
$ ((Module, ModuleOrigin) -> Module)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall b a. Ord b => (a -> b) -> [a] -> [a]
sortOn (Module, ModuleOrigin) -> Module
forall a b. (a, b) -> a
fst ([(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)])
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a b. (a -> b) -> a -> b
$ UniqMap Module ModuleOrigin -> [(Module, ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap Module ModuleOrigin
providers
  -- 3. Get the package names of the candidates
  let candidates_units = (UnitInfo -> (PackageName, UnitId))
-> [UnitInfo] -> [(PackageName, UnitId)]
forall a b. (a -> b) -> [a] -> [b]
map (\UnitInfo
ui -> ((UnitInfo -> PackageName
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> srcpkgname
unitPackageName UnitInfo
ui), UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
ui))
                              ([UnitInfo] -> [(PackageName, UnitId)])
-> [UnitInfo] -> [(PackageName, UnitId)]
forall a b. (a -> b) -> a -> b
$ (UnitId -> Maybe UnitInfo) -> [UnitId] -> [UnitInfo]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe (\UnitId
uid -> UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap (UnitState -> UnitInfoMap
unitInfoMap UnitState
unit_st) UnitId
uid) [UnitId]
candidates_uid
  -- 4. Check to see if the PackageName helps us disambiguate any candidates.
  lookup pn candidates_units

  where

    -- Get the UnitId from which a visible identifier is from
    to_uid :: (Module, ModuleOrigin) -> [UnitId]
    to_uid :: (Module, ModuleOrigin) -> [UnitId]
to_uid (Module
mod, ModOrigin Maybe Bool
mo [UnitInfo]
re_exps [UnitInfo]
_ Bool
_) =
      case Maybe Bool
mo of
        -- Available directly, but also potentially from re-exports
        Just Bool
True ->  (Unit -> UnitId
toUnitId (Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit Module
mod)) UnitId -> [UnitId] -> [UnitId]
forall a. a -> [a] -> [a]
: (UnitInfo -> UnitId) -> [UnitInfo] -> [UnitId]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId [UnitInfo]
re_exps
        -- Just available from these re-exports
        Maybe Bool
_ -> (UnitInfo -> UnitId) -> [UnitInfo] -> [UnitId]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId [UnitInfo]
re_exps
    to_uid (Module, ModuleOrigin)
_ = []

-- | Create a Map UnitId UnitInfo
--
-- For each instantiated unit, we add two map keys:
--    * the real unit id
--    * the virtual unit id made from its instantiation
--
-- We do the same thing for fully indefinite units (which are "instantiated"
-- with module holes).
--
mkUnitInfoMap :: [UnitInfo] -> UnitInfoMap
mkUnitInfoMap :: [UnitInfo] -> UnitInfoMap
mkUnitInfoMap [UnitInfo]
infos = (UnitInfoMap -> UnitInfo -> UnitInfoMap)
-> UnitInfoMap -> [UnitInfo] -> UnitInfoMap
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' UnitInfoMap -> UnitInfo -> UnitInfoMap
forall {srcpkgid} {srcpkgname}.
UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
-> GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UniqMap
     UnitId
     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
add UnitInfoMap
forall k a. UniqMap k a
emptyUniqMap [UnitInfo]
infos
  where
   mkVirt :: GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
mkVirt      GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p = GenInstantiatedUnit UnitId -> UnitId
virtualUnitId (UnitId -> [(ModuleName, Module)] -> GenInstantiatedUnit UnitId
forall u.
IsUnitId u =>
u -> GenInstantiations u -> GenInstantiatedUnit u
mkInstantiatedUnit (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitInstanceOf GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p) (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> [(ModuleName, Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, mod)]
unitInstantiations GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p))
   add :: UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
-> GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UniqMap
     UnitId
     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
add UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
pkg_map GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p
      | Bool -> Bool
not ([(ModuleName, Module)] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> [(ModuleName, Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, mod)]
unitInstantiations GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p))
      = UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
-> UnitId
-> GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UniqMap
     UnitId
     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
forall k a. Uniquable k => UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap (UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
-> UnitId
-> GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UniqMap
     UnitId
     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
forall k a. Uniquable k => UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
pkg_map (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
forall {srcpkgid} {srcpkgname}.
GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
mkVirt GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p) GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p)
                     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p) GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p
      | Bool
otherwise
      = UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
-> UnitId
-> GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UniqMap
     UnitId
     (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
forall k a. Uniquable k => UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap UniqMap
  UnitId
  (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module)
pkg_map (GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
-> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p) GenericUnitInfo srcpkgid srcpkgname UnitId ModuleName Module
p

-- | Get a list of entries from the unit database.  NB: be careful with
-- this function, although all units in this map are "visible", this
-- does not imply that the exposed-modules of the unit are available
-- (they may have been thinned or renamed).
listUnitInfo :: UnitState -> [UnitInfo]
listUnitInfo :: UnitState -> [UnitInfo]
listUnitInfo UnitState
state = UnitInfoMap -> [UnitInfo]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap (UnitState -> UnitInfoMap
unitInfoMap UnitState
state)

-- ----------------------------------------------------------------------------
-- Loading the unit db files and building up the unit state

-- | Read the unit database files, and sets up various internal tables of
-- unit information, according to the unit-related flags on the
-- command-line (@-package@, @-hide-package@ etc.)
--
-- 'initUnits' can be called again subsequently after updating the
-- 'packageFlags' field of the 'DynFlags', and it will update the
-- 'unitState' in 'DynFlags'.
initUnits :: Logger -> DynFlags -> Maybe [UnitDatabase UnitId] -> Set.Set UnitId -> IO ([UnitDatabase UnitId], UnitState, HomeUnit, Maybe PlatformConstants)
initUnits :: Logger
-> DynFlags
-> Maybe [UnitDatabase UnitId]
-> Set UnitId
-> IO
     ([UnitDatabase UnitId], UnitState, HomeUnit,
      Maybe PlatformConstants)
initUnits Logger
logger DynFlags
dflags Maybe [UnitDatabase UnitId]
cached_dbs Set UnitId
home_units = do

  let forceUnitInfoMap :: (UnitState, b) -> ()
forceUnitInfoMap (UnitState
state, b
_) = UnitState -> UnitInfoMap
unitInfoMap UnitState
state UnitInfoMap -> () -> ()
forall a b. a -> b -> b
`seq` ()

  (unit_state,dbs) <- Logger
-> SDoc
-> ((UnitState, [UnitDatabase UnitId]) -> ())
-> IO (UnitState, [UnitDatabase UnitId])
-> IO (UnitState, [UnitDatabase UnitId])
forall (m :: * -> *) a.
MonadIO m =>
Logger -> SDoc -> (a -> ()) -> m a -> m a
withTiming Logger
logger (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"initializing unit database")
                   (UnitState, [UnitDatabase UnitId]) -> ()
forall {b}. (UnitState, b) -> ()
forceUnitInfoMap
                 (IO (UnitState, [UnitDatabase UnitId])
 -> IO (UnitState, [UnitDatabase UnitId]))
-> IO (UnitState, [UnitDatabase UnitId])
-> IO (UnitState, [UnitDatabase UnitId])
forall a b. (a -> b) -> a -> b
$ Logger -> UnitConfig -> IO (UnitState, [UnitDatabase UnitId])
mkUnitState Logger
logger (DynFlags -> Maybe [UnitDatabase UnitId] -> Set UnitId -> UnitConfig
initUnitConfig DynFlags
dflags Maybe [UnitDatabase UnitId]
cached_dbs Set UnitId
home_units)

  putDumpFileMaybe logger Opt_D_dump_mod_map "Module Map"
    FormatText (updSDocContext (\SDocContext
ctx -> SDocContext
ctx {sdocLineLength = 200})
                $ pprModuleMap (moduleNameProvidersMap unit_state))

  let home_unit = UnitState
-> UnitId -> Maybe UnitId -> [(ModuleName, Module)] -> HomeUnit
mkHomeUnit UnitState
unit_state
                             (DynFlags -> UnitId
homeUnitId_ DynFlags
dflags)
                             (DynFlags -> Maybe UnitId
homeUnitInstanceOf_ DynFlags
dflags)
                             (DynFlags -> [(ModuleName, Module)]
homeUnitInstantiations_ DynFlags
dflags)

  -- Try to find platform constants
  --
  -- See Note [Platform constants] in GHC.Platform
  mconstants <- if homeUnitId_ dflags == rtsUnitId
    then do
      -- we're building the RTS! Lookup DerivedConstants.h in the include paths
      lookupPlatformConstants (includePathsGlobal (includePaths dflags))
    else
      -- lookup the DerivedConstants.h header bundled with the RTS unit. We
      -- don't fail if we can't find the RTS unit as it can be a valid (but
      -- uncommon) case, e.g. building a C utility program (not depending on the
      -- RTS) before building the RTS. In any case, we will fail later on if we
      -- really need to use the platform constants but they have not been loaded.
      case lookupUnitId unit_state rtsUnitId of
        Maybe UnitInfo
Nothing   -> Maybe PlatformConstants -> IO (Maybe PlatformConstants)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe PlatformConstants
forall a. Maybe a
Nothing
        Just UnitInfo
info -> [String] -> IO (Maybe PlatformConstants)
lookupPlatformConstants ((ShortText -> String) -> [ShortText] -> [String]
forall a b. (a -> b) -> [a] -> [b]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ShortText -> String
ST.unpack (UnitInfo -> [ShortText]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [ShortText]
unitIncludeDirs UnitInfo
info))

  return (dbs,unit_state,home_unit,mconstants)

mkHomeUnit
    :: UnitState
    -> UnitId                 -- ^ Home unit id
    -> Maybe UnitId           -- ^ Home unit instance of
    -> [(ModuleName, Module)] -- ^ Home unit instantiations
    -> HomeUnit
mkHomeUnit :: UnitState
-> UnitId -> Maybe UnitId -> [(ModuleName, Module)] -> HomeUnit
mkHomeUnit UnitState
unit_state UnitId
hu_id Maybe UnitId
hu_instanceof [(ModuleName, Module)]
hu_instantiations_ =
    let
        -- Some wired units can be used to instantiate the home unit. We need to
        -- replace their unit keys with their wired unit ids.
        wmap :: UniqMap UnitId UnitId
wmap              = UnitState -> UniqMap UnitId UnitId
wireMap UnitState
unit_state
        hu_instantiations :: [(ModuleName, Module)]
hu_instantiations = ((ModuleName, Module) -> (ModuleName, Module))
-> [(ModuleName, Module)] -> [(ModuleName, Module)]
forall a b. (a -> b) -> [a] -> [b]
map ((Module -> Module) -> (ModuleName, Module) -> (ModuleName, Module)
forall a b. (a -> b) -> (ModuleName, a) -> (ModuleName, b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (UniqMap UnitId UnitId -> Module -> Module
upd_wired_in_mod UniqMap UnitId UnitId
wmap)) [(ModuleName, Module)]
hu_instantiations_
    in case (Maybe UnitId
hu_instanceof, [(ModuleName, Module)]
hu_instantiations) of
      (Maybe UnitId
Nothing,[]) -> UnitId -> Maybe (UnitId, [(ModuleName, Module)]) -> HomeUnit
forall u. UnitId -> Maybe (u, GenInstantiations u) -> GenHomeUnit u
DefiniteHomeUnit UnitId
hu_id Maybe (UnitId, [(ModuleName, Module)])
forall a. Maybe a
Nothing
      (Maybe UnitId
Nothing, [(ModuleName, Module)]
_) -> GhcException -> HomeUnit
forall a. GhcException -> a
throwGhcException (GhcException -> HomeUnit) -> GhcException -> HomeUnit
forall a b. (a -> b) -> a -> b
$ String -> GhcException
CmdLineError (String
"Use of -instantiated-with requires -this-component-id")
      (Just UnitId
_, []) -> GhcException -> HomeUnit
forall a. GhcException -> a
throwGhcException (GhcException -> HomeUnit) -> GhcException -> HomeUnit
forall a b. (a -> b) -> a -> b
$ String -> GhcException
CmdLineError (String
"Use of -this-component-id requires -instantiated-with")
      (Just UnitId
u, [(ModuleName, Module)]
is)
         -- detect fully indefinite units: all their instantiations are hole
         -- modules and the home unit id is the same as the instantiating unit
         -- id (see Note [About units] in GHC.Unit)
         | ((ModuleName, Module) -> Bool) -> [(ModuleName, Module)] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (Module -> Bool
forall u. GenModule (GenUnit u) -> Bool
isHoleModule (Module -> Bool)
-> ((ModuleName, Module) -> Module) -> (ModuleName, Module) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (ModuleName, Module) -> Module
forall a b. (a, b) -> b
snd) [(ModuleName, Module)]
is Bool -> Bool -> Bool
&& UnitId
u UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitId
hu_id
         -> UnitId -> [(ModuleName, Module)] -> HomeUnit
forall u. UnitId -> GenInstantiations u -> GenHomeUnit u
IndefiniteHomeUnit UnitId
u [(ModuleName, Module)]
is
         -- otherwise it must be that we (fully) instantiate an indefinite unit
         -- to make it definite.
         -- TODO: error when the unit is partially instantiated??
         | Bool
otherwise
         -> UnitId -> Maybe (UnitId, [(ModuleName, Module)]) -> HomeUnit
forall u. UnitId -> Maybe (u, GenInstantiations u) -> GenHomeUnit u
DefiniteHomeUnit UnitId
hu_id ((UnitId, [(ModuleName, Module)])
-> Maybe (UnitId, [(ModuleName, Module)])
forall a. a -> Maybe a
Just (UnitId
u, [(ModuleName, Module)]
is))

-- -----------------------------------------------------------------------------
-- Reading the unit database(s)

readUnitDatabases :: Logger -> UnitConfig -> IO [UnitDatabase UnitId]
readUnitDatabases :: Logger -> UnitConfig -> IO [UnitDatabase UnitId]
readUnitDatabases Logger
logger UnitConfig
cfg = do
  conf_refs <- UnitConfig -> IO [PkgDbRef]
getUnitDbRefs UnitConfig
cfg
  confs     <- liftM catMaybes $ mapM (resolveUnitDatabase cfg) conf_refs
  mapM (readUnitDatabase logger cfg) confs


getUnitDbRefs :: UnitConfig -> IO [PkgDbRef]
getUnitDbRefs :: UnitConfig -> IO [PkgDbRef]
getUnitDbRefs UnitConfig
cfg = do
  let system_conf_refs :: [PkgDbRef]
system_conf_refs = [PkgDbRef
UserPkgDb, PkgDbRef
GlobalPkgDb]

  e_pkg_path <- IO String -> IO (Either IOException String)
forall a. IO a -> IO (Either IOException a)
tryIO (String -> IO String
getEnv (String -> IO String) -> String -> IO String
forall a b. (a -> b) -> a -> b
$ (Char -> Char) -> String -> String
forall a b. (a -> b) -> [a] -> [b]
map Char -> Char
toUpper (UnitConfig -> String
unitConfigProgramName UnitConfig
cfg) String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
"_PACKAGE_PATH")
  let base_conf_refs = case Either IOException String
e_pkg_path of
        Left IOException
_ -> [PkgDbRef]
system_conf_refs
        Right String
path
         | Just (String
xs, Char
x) <- String -> Maybe (String, Char)
forall a. [a] -> Maybe ([a], a)
snocView String
path, Char -> Bool
isSearchPathSeparator Char
x
         -> (String -> PkgDbRef) -> [String] -> [PkgDbRef]
forall a b. (a -> b) -> [a] -> [b]
map String -> PkgDbRef
PkgDbPath (String -> [String]
splitSearchPath String
xs) [PkgDbRef] -> [PkgDbRef] -> [PkgDbRef]
forall a. [a] -> [a] -> [a]
++ [PkgDbRef]
system_conf_refs
         | Bool
otherwise
         -> (String -> PkgDbRef) -> [String] -> [PkgDbRef]
forall a b. (a -> b) -> [a] -> [b]
map String -> PkgDbRef
PkgDbPath (String -> [String]
splitSearchPath String
path)

  -- Apply the package DB-related flags from the command line to get the
  -- final list of package DBs.
  --
  -- Notes on ordering:
  --  * The list of flags is reversed (later ones first)
  --  * We work with the package DB list in "left shadows right" order
  --  * and finally reverse it at the end, to get "right shadows left"
  --
  return $ reverse (foldr doFlag base_conf_refs (unitConfigFlagsDB cfg))
 where
  doFlag :: PackageDBFlag -> [PkgDbRef] -> [PkgDbRef]
doFlag (PackageDB PkgDbRef
p) [PkgDbRef]
dbs = PkgDbRef
p PkgDbRef -> [PkgDbRef] -> [PkgDbRef]
forall a. a -> [a] -> [a]
: [PkgDbRef]
dbs
  doFlag PackageDBFlag
NoUserPackageDB [PkgDbRef]
dbs = (PkgDbRef -> Bool) -> [PkgDbRef] -> [PkgDbRef]
forall a. (a -> Bool) -> [a] -> [a]
filter PkgDbRef -> Bool
isNotUser [PkgDbRef]
dbs
  doFlag PackageDBFlag
NoGlobalPackageDB [PkgDbRef]
dbs = (PkgDbRef -> Bool) -> [PkgDbRef] -> [PkgDbRef]
forall a. (a -> Bool) -> [a] -> [a]
filter PkgDbRef -> Bool
isNotGlobal [PkgDbRef]
dbs
  doFlag PackageDBFlag
ClearPackageDBs [PkgDbRef]
_ = []

  isNotUser :: PkgDbRef -> Bool
isNotUser PkgDbRef
UserPkgDb = Bool
False
  isNotUser PkgDbRef
_ = Bool
True

  isNotGlobal :: PkgDbRef -> Bool
isNotGlobal PkgDbRef
GlobalPkgDb = Bool
False
  isNotGlobal PkgDbRef
_ = Bool
True

-- | Return the path of a package database from a 'PkgDbRef'. Return 'Nothing'
-- when the user database filepath is expected but the latter doesn't exist.
--
-- NB: This logic is reimplemented in Cabal, so if you change it,
-- make sure you update Cabal. (Or, better yet, dump it in the
-- compiler info so Cabal can use the info.)
resolveUnitDatabase :: UnitConfig -> PkgDbRef -> IO (Maybe FilePath)
resolveUnitDatabase :: UnitConfig -> PkgDbRef -> IO (Maybe String)
resolveUnitDatabase UnitConfig
cfg PkgDbRef
GlobalPkgDb = Maybe String -> IO (Maybe String)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Maybe String -> IO (Maybe String))
-> Maybe String -> IO (Maybe String)
forall a b. (a -> b) -> a -> b
$ String -> Maybe String
forall a. a -> Maybe a
Just (UnitConfig -> String
unitConfigGlobalDB UnitConfig
cfg)
resolveUnitDatabase UnitConfig
cfg PkgDbRef
UserPkgDb = MaybeT IO String -> IO (Maybe String)
forall (m :: * -> *) a. MaybeT m a -> m (Maybe a)
runMaybeT (MaybeT IO String -> IO (Maybe String))
-> MaybeT IO String -> IO (Maybe String)
forall a b. (a -> b) -> a -> b
$ do
  dir <- String -> ArchOS -> MaybeT IO String
versionedAppDir (UnitConfig -> String
unitConfigProgramName UnitConfig
cfg) (UnitConfig -> ArchOS
unitConfigPlatformArchOS UnitConfig
cfg)
  let pkgconf = String
dir String -> String -> String
</> UnitConfig -> String
unitConfigDBName UnitConfig
cfg
  exist <- tryMaybeT $ doesDirectoryExist pkgconf
  if exist then return pkgconf else mzero
resolveUnitDatabase UnitConfig
_ (PkgDbPath String
name) = Maybe String -> IO (Maybe String)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Maybe String -> IO (Maybe String))
-> Maybe String -> IO (Maybe String)
forall a b. (a -> b) -> a -> b
$ String -> Maybe String
forall a. a -> Maybe a
Just String
name

readUnitDatabase :: Logger -> UnitConfig -> FilePath -> IO (UnitDatabase UnitId)
readUnitDatabase :: Logger -> UnitConfig -> String -> IO (UnitDatabase UnitId)
readUnitDatabase Logger
logger UnitConfig
cfg String
conf_file = do
  isdir <- String -> IO Bool
doesDirectoryExist String
conf_file

  proto_pkg_configs <-
    if isdir
       then readDirStyleUnitInfo conf_file
       else do
            isfile <- doesFileExist conf_file
            if isfile
               then do
                 mpkgs <- tryReadOldFileStyleUnitInfo
                 case mpkgs of
                   Just [DbUnitInfo]
pkgs -> [DbUnitInfo] -> IO [DbUnitInfo]
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return [DbUnitInfo]
pkgs
                   Maybe [DbUnitInfo]
Nothing   -> GhcException -> IO [DbUnitInfo]
forall a. GhcException -> IO a
throwGhcExceptionIO (GhcException -> IO [DbUnitInfo])
-> GhcException -> IO [DbUnitInfo]
forall a b. (a -> b) -> a -> b
$ String -> GhcException
InstallationError (String -> GhcException) -> String -> GhcException
forall a b. (a -> b) -> a -> b
$
                      String
"ghc no longer supports single-file style package " String -> String -> String
forall a. [a] -> [a] -> [a]
++
                      String
"databases (" String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
conf_file String -> String -> String
forall a. [a] -> [a] -> [a]
++
                      String
") use 'ghc-pkg init' to create the database with " String -> String -> String
forall a. [a] -> [a] -> [a]
++
                      String
"the correct format."
               else throwGhcExceptionIO $ InstallationError $
                      "can't find a package database at " ++ conf_file

  let
      -- Fix #16360: remove trailing slash from conf_file before calculating pkgroot
      conf_file' = String -> String
dropTrailingPathSeparator String
conf_file
      top_dir = UnitConfig -> String
unitConfigGHCDir UnitConfig
cfg
      pkgroot = String -> String
takeDirectory String
conf_file'
      pkg_configs1 = (DbUnitInfo -> UnitInfo) -> [DbUnitInfo] -> [UnitInfo]
forall a b. (a -> b) -> [a] -> [b]
map (String -> String -> UnitInfo -> UnitInfo
mungeUnitInfo String
top_dir String
pkgroot (UnitInfo -> UnitInfo)
-> (DbUnitInfo -> UnitInfo) -> DbUnitInfo -> UnitInfo
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (UnitKey -> UnitId) -> GenUnitInfo UnitKey -> UnitInfo
forall v u.
IsUnitId v =>
(u -> v) -> GenUnitInfo u -> GenUnitInfo v
mapUnitInfo (\(UnitKey FastString
x) -> FastString -> UnitId
UnitId FastString
x) (GenUnitInfo UnitKey -> UnitInfo)
-> (DbUnitInfo -> GenUnitInfo UnitKey) -> DbUnitInfo -> UnitInfo
forall b c a. (b -> c) -> (a -> b) -> a -> c
. DbUnitInfo -> GenUnitInfo UnitKey
mkUnitKeyInfo)
                         [DbUnitInfo]
proto_pkg_configs
  --
  return $ UnitDatabase conf_file' pkg_configs1
  where
    readDirStyleUnitInfo :: String -> IO [DbUnitInfo]
readDirStyleUnitInfo String
conf_dir = do
      let filename :: String
filename = String
conf_dir String -> String -> String
</> String
"package.cache"
      cache_exists <- String -> IO Bool
doesFileExist String
filename
      if cache_exists
        then do
          debugTraceMsg logger 2 $ text "Using binary package database:" <+> text filename
          readPackageDbForGhc filename
        else do
          -- If there is no package.cache file, we check if the database is not
          -- empty by inspecting if the directory contains any .conf file. If it
          -- does, something is wrong and we fail. Otherwise we assume that the
          -- database is empty.
          debugTraceMsg logger 2 $ text "There is no package.cache in"
                      <+> text conf_dir
                       <> text ", checking if the database is empty"
          db_empty <- all (not . isSuffixOf ".conf")
                   <$> getDirectoryContents conf_dir
          if db_empty
            then do
              debugTraceMsg logger 3 $ text "There are no .conf files in"
                          <+> text conf_dir <> text ", treating"
                          <+> text "package database as empty"
              return []
            else
              throwGhcExceptionIO $ InstallationError $
                "there is no package.cache in " ++ conf_dir ++
                " even though package database is not empty"


    -- Single-file style package dbs have been deprecated for some time, but
    -- it turns out that Cabal was using them in one place. So this is a
    -- workaround to allow older Cabal versions to use this newer ghc.
    -- We check if the file db contains just "[]" and if so, we look for a new
    -- dir-style db in conf_file.d/, ie in a dir next to the given file.
    -- We cannot just replace the file with a new dir style since Cabal still
    -- assumes it's a file and tries to overwrite with 'writeFile'.
    -- ghc-pkg also cooperates with this workaround.
    tryReadOldFileStyleUnitInfo :: IO (Maybe [DbUnitInfo])
tryReadOldFileStyleUnitInfo = do
      content <- String -> IO String
readFile String
conf_file IO String -> (IOException -> IO String) -> IO String
forall a. IO a -> (IOException -> IO a) -> IO a
`catchIO` \IOException
_ -> String -> IO String
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return String
""
      if take 2 content == "[]"
        then do
          let conf_dir = String
conf_file String -> String -> String
<.> String
"d"
          direxists <- doesDirectoryExist conf_dir
          if direxists
             then do debugTraceMsg logger 2 (text "Ignoring old file-style db and trying:" <+> text conf_dir)
                     liftM Just (readDirStyleUnitInfo conf_dir)
             else return (Just []) -- ghc-pkg will create it when it's updated
        else return Nothing

distrustAllUnits :: [UnitInfo] -> [UnitInfo]
distrustAllUnits :: [UnitInfo] -> [UnitInfo]
distrustAllUnits [UnitInfo]
pkgs = (UnitInfo -> UnitInfo) -> [UnitInfo] -> [UnitInfo]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitInfo
forall {srcpkgid} {srcpkgname} {uid} {modulename} {mod}.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> GenericUnitInfo srcpkgid srcpkgname uid modulename mod
distrust [UnitInfo]
pkgs
  where
    distrust :: GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> GenericUnitInfo srcpkgid srcpkgname uid modulename mod
distrust GenericUnitInfo srcpkgid srcpkgname uid modulename mod
pkg = GenericUnitInfo srcpkgid srcpkgname uid modulename mod
pkg{ unitIsTrusted = False }

mungeUnitInfo :: FilePath -> FilePath
                   -> UnitInfo -> UnitInfo
mungeUnitInfo :: String -> String -> UnitInfo -> UnitInfo
mungeUnitInfo String
top_dir String
pkgroot =
    UnitInfo -> UnitInfo
mungeDynLibFields
  (UnitInfo -> UnitInfo)
-> (UnitInfo -> UnitInfo) -> UnitInfo -> UnitInfo
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ShortText -> ShortText -> UnitInfo -> UnitInfo
forall a b c d e.
ShortText
-> ShortText
-> GenericUnitInfo a b c d e
-> GenericUnitInfo a b c d e
mungeUnitInfoPaths (String -> ShortText
ST.pack String
top_dir) (String -> ShortText
ST.pack String
pkgroot)

mungeDynLibFields :: UnitInfo -> UnitInfo
mungeDynLibFields :: UnitInfo -> UnitInfo
mungeDynLibFields UnitInfo
pkg =
    UnitInfo
pkg {
      unitLibraryDynDirs = case unitLibraryDynDirs pkg of
         [] -> UnitInfo -> [ShortText]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [ShortText]
unitLibraryDirs UnitInfo
pkg
         [ShortText]
ds -> [ShortText]
ds
    }

-- -----------------------------------------------------------------------------
-- Modify our copy of the unit database based on trust flags,
-- -trust and -distrust.

applyTrustFlag
   :: UnitPrecedenceMap
   -> UnusableUnits
   -> [UnitInfo]
   -> TrustFlag
   -> MaybeErr UnitErr [UnitInfo]
applyTrustFlag :: UnitPrecedenceMap
-> UnusableUnits
-> [UnitInfo]
-> TrustFlag
-> MaybeErr UnitErr [UnitInfo]
applyTrustFlag UnitPrecedenceMap
prec_map UnusableUnits
unusable [UnitInfo]
pkgs TrustFlag
flag =
  case TrustFlag
flag of
    -- we trust all matching packages. Maybe should only trust first one?
    -- and leave others the same or set them untrusted
    TrustPackage String
str ->
       case UnitPrecedenceMap
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] ([UnitInfo], [UnitInfo])
selectPackages UnitPrecedenceMap
prec_map (String -> PackageArg
PackageArg String
str) [UnitInfo]
pkgs UnusableUnits
unusable of
         Left [(UnitInfo, UnusableUnitReason)]
ps       -> UnitErr -> MaybeErr UnitErr [UnitInfo]
forall err val. err -> MaybeErr err val
Failed (TrustFlag -> [(UnitInfo, UnusableUnitReason)] -> UnitErr
TrustFlagErr TrustFlag
flag [(UnitInfo, UnusableUnitReason)]
ps)
         Right ([UnitInfo]
ps,[UnitInfo]
qs) -> [UnitInfo] -> MaybeErr UnitErr [UnitInfo]
forall err val. val -> MaybeErr err val
Succeeded ((UnitInfo -> UnitInfo) -> [UnitInfo] -> [UnitInfo]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitInfo
forall {srcpkgid} {srcpkgname} {uid} {modulename} {mod}.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> GenericUnitInfo srcpkgid srcpkgname uid modulename mod
trust [UnitInfo]
ps [UnitInfo] -> [UnitInfo] -> [UnitInfo]
forall a. [a] -> [a] -> [a]
++ [UnitInfo]
qs)
          where trust :: GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> GenericUnitInfo srcpkgid srcpkgname uid modulename mod
trust GenericUnitInfo srcpkgid srcpkgname uid modulename mod
p = GenericUnitInfo srcpkgid srcpkgname uid modulename mod
p {unitIsTrusted=True}

    DistrustPackage String
str ->
       case UnitPrecedenceMap
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] ([UnitInfo], [UnitInfo])
selectPackages UnitPrecedenceMap
prec_map (String -> PackageArg
PackageArg String
str) [UnitInfo]
pkgs UnusableUnits
unusable of
         Left [(UnitInfo, UnusableUnitReason)]
ps       -> UnitErr -> MaybeErr UnitErr [UnitInfo]
forall err val. err -> MaybeErr err val
Failed (TrustFlag -> [(UnitInfo, UnusableUnitReason)] -> UnitErr
TrustFlagErr TrustFlag
flag [(UnitInfo, UnusableUnitReason)]
ps)
         Right ([UnitInfo]
ps,[UnitInfo]
qs) -> [UnitInfo] -> MaybeErr UnitErr [UnitInfo]
forall err val. val -> MaybeErr err val
Succeeded ([UnitInfo] -> [UnitInfo]
distrustAllUnits [UnitInfo]
ps [UnitInfo] -> [UnitInfo] -> [UnitInfo]
forall a. [a] -> [a] -> [a]
++ [UnitInfo]
qs)

applyPackageFlag
   :: UnitPrecedenceMap
   -> UnitInfoMap
   -> PreloadUnitClosure
   -> UnusableUnits
   -> Bool -- if False, if you expose a package, it implicitly hides
           -- any previously exposed packages with the same name
   -> [UnitInfo]
   -> VisibilityMap           -- Initially exposed
   -> PackageFlag             -- flag to apply
   -> MaybeErr UnitErr VisibilityMap -- Now exposed

applyPackageFlag :: UnitPrecedenceMap
-> UnitInfoMap
-> PreloadUnitClosure
-> UnusableUnits
-> Bool
-> [UnitInfo]
-> VisibilityMap
-> PackageFlag
-> MaybeErr UnitErr VisibilityMap
applyPackageFlag UnitPrecedenceMap
prec_map UnitInfoMap
pkg_map PreloadUnitClosure
closure UnusableUnits
unusable Bool
no_hide_others [UnitInfo]
pkgs VisibilityMap
vm PackageFlag
flag =
  case PackageFlag
flag of
    ExposePackage String
_ PackageArg
arg (ModRenaming Bool
b [(ModuleName, ModuleName)]
rns) ->
       case UnitPrecedenceMap
-> UnitInfoMap
-> PreloadUnitClosure
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
findPackages UnitPrecedenceMap
prec_map UnitInfoMap
pkg_map PreloadUnitClosure
closure PackageArg
arg [UnitInfo]
pkgs UnusableUnits
unusable of
         Left [(UnitInfo, UnusableUnitReason)]
ps     -> UnitErr -> MaybeErr UnitErr VisibilityMap
forall err val. err -> MaybeErr err val
Failed (PackageFlag -> [(UnitInfo, UnusableUnitReason)] -> UnitErr
PackageFlagErr PackageFlag
flag [(UnitInfo, UnusableUnitReason)]
ps)
         Right (UnitInfo
p:[UnitInfo]
_) -> VisibilityMap -> MaybeErr UnitErr VisibilityMap
forall err val. val -> MaybeErr err val
Succeeded VisibilityMap
vm'
          where
           n :: FastString
n = UnitInfo -> FastString
fsPackageName UnitInfo
p

           -- If a user says @-unit-id p[A=<A>]@, this imposes
           -- a requirement on us: whatever our signature A is,
           -- it must fulfill all of p[A=<A>]:A's requirements.
           -- This method is responsible for computing what our
           -- inherited requirements are.
           reqs :: UniqMap ModuleName (Set InstantiatedModule)
reqs | UnitIdArg Unit
orig_uid <- PackageArg
arg = Unit -> UniqMap ModuleName (Set InstantiatedModule)
forall {u}.
GenUnit u
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
collectHoles Unit
orig_uid
                | Bool
otherwise                 = UniqMap ModuleName (Set InstantiatedModule)
forall k a. UniqMap k a
emptyUniqMap

           collectHoles :: GenUnit u
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
collectHoles GenUnit u
uid = case GenUnit u
uid of
             GenUnit u
HoleUnit       -> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
forall k a. UniqMap k a
emptyUniqMap
             RealUnit {}    -> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
forall k a. UniqMap k a
emptyUniqMap -- definite units don't have holes
             VirtUnit GenInstantiatedUnit u
indef ->
                  let local :: [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
local = [ ModuleName
-> Set (GenModule (GenInstantiatedUnit u))
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
forall k a. Uniquable k => k -> a -> UniqMap k a
unitUniqMap
                                  (GenModule (GenUnit u) -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName GenModule (GenUnit u)
mod)
                                  (GenModule (GenInstantiatedUnit u)
-> Set (GenModule (GenInstantiatedUnit u))
forall a. a -> Set a
Set.singleton (GenModule (GenInstantiatedUnit u)
 -> Set (GenModule (GenInstantiatedUnit u)))
-> GenModule (GenInstantiatedUnit u)
-> Set (GenModule (GenInstantiatedUnit u))
forall a b. (a -> b) -> a -> b
$ GenInstantiatedUnit u
-> ModuleName -> GenModule (GenInstantiatedUnit u)
forall unit. unit -> ModuleName -> GenModule unit
Module GenInstantiatedUnit u
indef ModuleName
mod_name)
                              | (ModuleName
mod_name, GenModule (GenUnit u)
mod) <- GenInstantiatedUnit u -> GenInstantiations u
forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts GenInstantiatedUnit u
indef
                              , GenModule (GenUnit u) -> Bool
forall u. GenModule (GenUnit u) -> Bool
isHoleModule GenModule (GenUnit u)
mod ]
                      recurse :: [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
recurse = [ GenUnit u
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
collectHoles (GenModule (GenUnit u) -> GenUnit u
forall unit. GenModule unit -> unit
moduleUnit GenModule (GenUnit u)
mod)
                                | (ModuleName
_, GenModule (GenUnit u)
mod) <- GenInstantiatedUnit u -> GenInstantiations u
forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts GenInstantiatedUnit u
indef ]
                  in (Set (GenModule (GenInstantiatedUnit u))
 -> Set (GenModule (GenInstantiatedUnit u))
 -> Set (GenModule (GenInstantiatedUnit u)))
-> [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
forall a k. (a -> a -> a) -> [UniqMap k a] -> UniqMap k a
plusUniqMapListWith Set (GenModule (GenInstantiatedUnit u))
-> Set (GenModule (GenInstantiatedUnit u))
-> Set (GenModule (GenInstantiatedUnit u))
forall a. Ord a => Set a -> Set a -> Set a
Set.union ([UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
 -> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u))))
-> [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
-> UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))
forall a b. (a -> b) -> a -> b
$ [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
local [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
-> [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
-> [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
forall a. [a] -> [a] -> [a]
++ [UniqMap ModuleName (Set (GenModule (GenInstantiatedUnit u)))]
recurse

           uv :: UnitVisibility
uv = UnitVisibility
                { uv_expose_all :: Bool
uv_expose_all = Bool
b
                , uv_renamings :: [(ModuleName, ModuleName)]
uv_renamings = [(ModuleName, ModuleName)]
rns
                , uv_package_name :: First FastString
uv_package_name = Maybe FastString -> First FastString
forall a. Maybe a -> First a
First (FastString -> Maybe FastString
forall a. a -> Maybe a
Just FastString
n)
                , uv_requirements :: UniqMap ModuleName (Set InstantiatedModule)
uv_requirements = UniqMap ModuleName (Set InstantiatedModule)
reqs
                , uv_explicit :: Maybe PackageArg
uv_explicit = PackageArg -> Maybe PackageArg
forall a. a -> Maybe a
Just PackageArg
arg
                }
           vm' :: VisibilityMap
vm' = (UnitVisibility -> UnitVisibility -> UnitVisibility)
-> VisibilityMap -> Unit -> UnitVisibility -> VisibilityMap
forall k a.
Uniquable k =>
(a -> a -> a) -> UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap_C UnitVisibility -> UnitVisibility -> UnitVisibility
forall a. Monoid a => a -> a -> a
mappend VisibilityMap
vm_cleared (UnitInfo -> Unit
mkUnit UnitInfo
p) UnitVisibility
uv
           -- In the old days, if you said `ghc -package p-0.1 -package p-0.2`
           -- (or if p-0.1 was registered in the pkgdb as exposed: True),
           -- the second package flag would override the first one and you
           -- would only see p-0.2 in exposed modules.  This is good for
           -- usability.
           --
           -- However, with thinning and renaming (or Backpack), there might be
           -- situations where you legitimately want to see two versions of a
           -- package at the same time, and this behavior would make it
           -- impossible to do so.  So we decided that if you pass
           -- -hide-all-packages, this should turn OFF the overriding behavior
           -- where an exposed package hides all other packages with the same
           -- name.  This should not affect Cabal at all, which only ever
           -- exposes one package at a time.
           --
           -- NB: Why a variable no_hide_others?  We have to apply this logic to
           -- -plugin-package too, and it's more consistent if the switch in
           -- behavior is based off of
           -- -hide-all-packages/-hide-all-plugin-packages depending on what
           -- flag is in question.
           vm_cleared :: VisibilityMap
vm_cleared | Bool
no_hide_others = VisibilityMap
vm
                      -- NB: renamings never clear
                      | ((ModuleName, ModuleName)
_:[(ModuleName, ModuleName)]
_) <- [(ModuleName, ModuleName)]
rns = VisibilityMap
vm
                      | Bool
otherwise = (Unit -> UnitVisibility -> Bool) -> VisibilityMap -> VisibilityMap
forall k a. (k -> a -> Bool) -> UniqMap k a -> UniqMap k a
filterWithKeyUniqMap
                            (\Unit
k UnitVisibility
uv -> Unit
k Unit -> Unit -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> Unit
mkUnit UnitInfo
p
                                   Bool -> Bool -> Bool
|| Maybe FastString -> First FastString
forall a. Maybe a -> First a
First (FastString -> Maybe FastString
forall a. a -> Maybe a
Just FastString
n) First FastString -> First FastString -> Bool
forall a. Eq a => a -> a -> Bool
/= UnitVisibility -> First FastString
uv_package_name UnitVisibility
uv) VisibilityMap
vm
         Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
_ -> String -> MaybeErr UnitErr VisibilityMap
forall a. HasCallStack => String -> a
panic String
"applyPackageFlag"

    HidePackage String
str ->
       case UnitPrecedenceMap
-> UnitInfoMap
-> PreloadUnitClosure
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
findPackages UnitPrecedenceMap
prec_map UnitInfoMap
pkg_map PreloadUnitClosure
closure (String -> PackageArg
PackageArg String
str) [UnitInfo]
pkgs UnusableUnits
unusable of
         Left [(UnitInfo, UnusableUnitReason)]
ps  -> UnitErr -> MaybeErr UnitErr VisibilityMap
forall err val. err -> MaybeErr err val
Failed (PackageFlag -> [(UnitInfo, UnusableUnitReason)] -> UnitErr
PackageFlagErr PackageFlag
flag [(UnitInfo, UnusableUnitReason)]
ps)
         Right [UnitInfo]
ps -> VisibilityMap -> MaybeErr UnitErr VisibilityMap
forall err val. val -> MaybeErr err val
Succeeded (VisibilityMap -> MaybeErr UnitErr VisibilityMap)
-> VisibilityMap -> MaybeErr UnitErr VisibilityMap
forall a b. (a -> b) -> a -> b
$ (VisibilityMap -> Unit -> VisibilityMap)
-> VisibilityMap -> [Unit] -> VisibilityMap
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' VisibilityMap -> Unit -> VisibilityMap
forall k a. Uniquable k => UniqMap k a -> k -> UniqMap k a
delFromUniqMap VisibilityMap
vm ((UnitInfo -> Unit) -> [UnitInfo] -> [Unit]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> Unit
mkUnit [UnitInfo]
ps)

-- | Like 'selectPackages', but doesn't return a list of unmatched
-- packages.  Furthermore, any packages it returns are *renamed*
-- if the 'UnitArg' has a renaming associated with it.
findPackages :: UnitPrecedenceMap
             -> UnitInfoMap
             -> PreloadUnitClosure
             -> PackageArg -> [UnitInfo]
             -> UnusableUnits
             -> Either [(UnitInfo, UnusableUnitReason)]
                [UnitInfo]
findPackages :: UnitPrecedenceMap
-> UnitInfoMap
-> PreloadUnitClosure
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
findPackages UnitPrecedenceMap
prec_map UnitInfoMap
pkg_map PreloadUnitClosure
closure PackageArg
arg [UnitInfo]
pkgs UnusableUnits
unusable
  = let ps :: [UnitInfo]
ps = (UnitInfo -> Maybe UnitInfo) -> [UnitInfo] -> [UnitInfo]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe (PackageArg -> UnitInfo -> Maybe UnitInfo
finder PackageArg
arg) [UnitInfo]
pkgs
    in if [UnitInfo] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [UnitInfo]
ps
        then [(UnitInfo, UnusableUnitReason)]
-> Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
forall a b. a -> Either a b
Left (((UnitInfo, UnusableUnitReason)
 -> Maybe (UnitInfo, UnusableUnitReason))
-> [(UnitInfo, UnusableUnitReason)]
-> [(UnitInfo, UnusableUnitReason)]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe (\(UnitInfo
x,UnusableUnitReason
y) -> PackageArg -> UnitInfo -> Maybe UnitInfo
finder PackageArg
arg UnitInfo
x Maybe UnitInfo
-> (UnitInfo -> Maybe (UnitInfo, UnusableUnitReason))
-> Maybe (UnitInfo, UnusableUnitReason)
forall a b. Maybe a -> (a -> Maybe b) -> Maybe b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \UnitInfo
x' -> (UnitInfo, UnusableUnitReason)
-> Maybe (UnitInfo, UnusableUnitReason)
forall a. a -> Maybe a
forall (m :: * -> *) a. Monad m => a -> m a
return (UnitInfo
x',UnusableUnitReason
y))
                            (UnusableUnits -> [(UnitInfo, UnusableUnitReason)]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnusableUnits
unusable))
        else [UnitInfo] -> Either [(UnitInfo, UnusableUnitReason)] [UnitInfo]
forall a b. b -> Either a b
Right (UnitPrecedenceMap -> [UnitInfo] -> [UnitInfo]
sortByPreference UnitPrecedenceMap
prec_map [UnitInfo]
ps)
  where
    finder :: PackageArg -> UnitInfo -> Maybe UnitInfo
finder (PackageArg String
str) UnitInfo
p
      = if String -> UnitInfo -> Bool
matchingStr String
str UnitInfo
p
          then UnitInfo -> Maybe UnitInfo
forall a. a -> Maybe a
Just UnitInfo
p
          else Maybe UnitInfo
forall a. Maybe a
Nothing
    finder (UnitIdArg Unit
uid) UnitInfo
p
      = case Unit
uid of
          RealUnit (Definite UnitId
iuid)
            | UnitId
iuid UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
p
            -> UnitInfo -> Maybe UnitInfo
forall a. a -> Maybe a
Just UnitInfo
p
          VirtUnit GenInstantiatedUnit UnitId
inst
            | GenInstantiatedUnit UnitId -> UnitId
forall unit. GenInstantiatedUnit unit -> unit
instUnitInstanceOf GenInstantiatedUnit UnitId
inst UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
p
            -> UnitInfo -> Maybe UnitInfo
forall a. a -> Maybe a
Just (UnitInfoMap
-> PreloadUnitClosure
-> [(ModuleName, Module)]
-> UnitInfo
-> UnitInfo
renameUnitInfo UnitInfoMap
pkg_map PreloadUnitClosure
closure (GenInstantiatedUnit UnitId -> [(ModuleName, Module)]
forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts GenInstantiatedUnit UnitId
inst) UnitInfo
p)
          Unit
_ -> Maybe UnitInfo
forall a. Maybe a
Nothing

selectPackages :: UnitPrecedenceMap -> PackageArg -> [UnitInfo]
               -> UnusableUnits
               -> Either [(UnitInfo, UnusableUnitReason)]
                  ([UnitInfo], [UnitInfo])
selectPackages :: UnitPrecedenceMap
-> PackageArg
-> [UnitInfo]
-> UnusableUnits
-> Either [(UnitInfo, UnusableUnitReason)] ([UnitInfo], [UnitInfo])
selectPackages UnitPrecedenceMap
prec_map PackageArg
arg [UnitInfo]
pkgs UnusableUnits
unusable
  = let matches :: UnitInfo -> Bool
matches = PackageArg -> UnitInfo -> Bool
matching PackageArg
arg
        ([UnitInfo]
ps,[UnitInfo]
rest) = (UnitInfo -> Bool) -> [UnitInfo] -> ([UnitInfo], [UnitInfo])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition UnitInfo -> Bool
matches [UnitInfo]
pkgs
    in if [UnitInfo] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [UnitInfo]
ps
        then [(UnitInfo, UnusableUnitReason)]
-> Either [(UnitInfo, UnusableUnitReason)] ([UnitInfo], [UnitInfo])
forall a b. a -> Either a b
Left (((UnitInfo, UnusableUnitReason) -> Bool)
-> [(UnitInfo, UnusableUnitReason)]
-> [(UnitInfo, UnusableUnitReason)]
forall a. (a -> Bool) -> [a] -> [a]
filter (UnitInfo -> Bool
matches(UnitInfo -> Bool)
-> ((UnitInfo, UnusableUnitReason) -> UnitInfo)
-> (UnitInfo, UnusableUnitReason)
-> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
.(UnitInfo, UnusableUnitReason) -> UnitInfo
forall a b. (a, b) -> a
fst) (UnusableUnits -> [(UnitInfo, UnusableUnitReason)]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnusableUnits
unusable))
        else ([UnitInfo], [UnitInfo])
-> Either [(UnitInfo, UnusableUnitReason)] ([UnitInfo], [UnitInfo])
forall a b. b -> Either a b
Right (UnitPrecedenceMap -> [UnitInfo] -> [UnitInfo]
sortByPreference UnitPrecedenceMap
prec_map [UnitInfo]
ps, [UnitInfo]
rest)

-- | Rename a 'UnitInfo' according to some module instantiation.
renameUnitInfo :: UnitInfoMap -> PreloadUnitClosure -> [(ModuleName, Module)] -> UnitInfo -> UnitInfo
renameUnitInfo :: UnitInfoMap
-> PreloadUnitClosure
-> [(ModuleName, Module)]
-> UnitInfo
-> UnitInfo
renameUnitInfo UnitInfoMap
pkg_map PreloadUnitClosure
closure [(ModuleName, Module)]
insts UnitInfo
conf =
    let hsubst :: UniqFM ModuleName Module
hsubst = [(ModuleName, Module)] -> UniqFM ModuleName Module
forall key elt. Uniquable key => [(key, elt)] -> UniqFM key elt
listToUFM [(ModuleName, Module)]
insts
        smod :: Module -> Module
smod  = UnitInfoMap
-> PreloadUnitClosure
-> UniqFM ModuleName Module
-> Module
-> Module
renameHoleModule' UnitInfoMap
pkg_map PreloadUnitClosure
closure UniqFM ModuleName Module
hsubst
        new_insts :: [(ModuleName, Module)]
new_insts = ((ModuleName, Module) -> (ModuleName, Module))
-> [(ModuleName, Module)] -> [(ModuleName, Module)]
forall a b. (a -> b) -> [a] -> [b]
map (\(ModuleName
k,Module
v) -> (ModuleName
k,Module -> Module
smod Module
v)) (UnitInfo -> [(ModuleName, Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, mod)]
unitInstantiations UnitInfo
conf)
    in UnitInfo
conf {
        unitInstantiations = new_insts,
        unitExposedModules = map (\(ModuleName
mod_name, Maybe Module
mb_mod) -> (ModuleName
mod_name, (Module -> Module) -> Maybe Module -> Maybe Module
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Module -> Module
smod Maybe Module
mb_mod))
                             (unitExposedModules conf)
    }


-- A package named on the command line can either include the
-- version, or just the name if it is unambiguous.
matchingStr :: String -> UnitInfo -> Bool
matchingStr :: String -> UnitInfo -> Bool
matchingStr String
str UnitInfo
p
        =  String
str String -> String -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> String
forall u. GenUnitInfo u -> String
unitPackageIdString UnitInfo
p
        Bool -> Bool -> Bool
|| String
str String -> String -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> String
forall u. GenUnitInfo u -> String
unitPackageNameString UnitInfo
p

matchingId :: UnitId -> UnitInfo -> Bool
matchingId :: UnitId -> UnitInfo -> Bool
matchingId UnitId
uid UnitInfo
p = UnitId
uid UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
p

matching :: PackageArg -> UnitInfo -> Bool
matching :: PackageArg -> UnitInfo -> Bool
matching (PackageArg String
str) = String -> UnitInfo -> Bool
matchingStr String
str
matching (UnitIdArg (RealUnit (Definite UnitId
uid))) = UnitId -> UnitInfo -> Bool
matchingId UnitId
uid
matching (UnitIdArg Unit
_)  = \UnitInfo
_ -> Bool
False -- TODO: warn in this case

-- | This sorts a list of packages, putting "preferred" packages first.
-- See 'compareByPreference' for the semantics of "preference".
sortByPreference :: UnitPrecedenceMap -> [UnitInfo] -> [UnitInfo]
sortByPreference :: UnitPrecedenceMap -> [UnitInfo] -> [UnitInfo]
sortByPreference UnitPrecedenceMap
prec_map = (UnitInfo -> UnitInfo -> Ordering) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> a -> Ordering) -> [a] -> [a]
sortBy ((UnitInfo -> UnitInfo -> Ordering)
-> UnitInfo -> UnitInfo -> Ordering
forall a b c. (a -> b -> c) -> b -> a -> c
flip (UnitPrecedenceMap -> UnitInfo -> UnitInfo -> Ordering
compareByPreference UnitPrecedenceMap
prec_map))

-- | Returns 'GT' if @pkg@ should be preferred over @pkg'@ when picking
-- which should be "active".  Here is the order of preference:
--
--      1. First, prefer the latest version
--      2. If the versions are the same, prefer the package that
--      came in the latest package database.
--
-- Pursuant to #12518, we could change this policy to, for example, remove
-- the version preference, meaning that we would always prefer the units
-- in later unit database.
compareByPreference
    :: UnitPrecedenceMap
    -> UnitInfo
    -> UnitInfo
    -> Ordering
compareByPreference :: UnitPrecedenceMap -> UnitInfo -> UnitInfo -> Ordering
compareByPreference UnitPrecedenceMap
prec_map UnitInfo
pkg UnitInfo
pkg'
  = case (UnitInfo -> Version) -> UnitInfo -> UnitInfo -> Ordering
forall a t. Ord a => (t -> a) -> t -> t -> Ordering
comparing UnitInfo -> Version
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Version
unitPackageVersion UnitInfo
pkg UnitInfo
pkg' of
        Ordering
GT -> Ordering
GT
        Ordering
EQ | Just Int
prec  <- UnitPrecedenceMap -> UnitId -> Maybe Int
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitPrecedenceMap
prec_map (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg)
           , Just Int
prec' <- UnitPrecedenceMap -> UnitId -> Maybe Int
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitPrecedenceMap
prec_map (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg')
           -- Prefer the unit from the later DB flag (i.e., higher
           -- precedence)
           -> Int -> Int -> Ordering
forall a. Ord a => a -> a -> Ordering
compare Int
prec Int
prec'
           | Bool
otherwise
           -> Ordering
EQ
        Ordering
LT -> Ordering
LT

comparing :: Ord a => (t -> a) -> t -> t -> Ordering
comparing :: forall a t. Ord a => (t -> a) -> t -> t -> Ordering
comparing t -> a
f t
a t
b = t -> a
f t
a a -> a -> Ordering
forall a. Ord a => a -> a -> Ordering
`compare` t -> a
f t
b

pprFlag :: PackageFlag -> SDoc
pprFlag :: PackageFlag -> SDoc
pprFlag PackageFlag
flag = case PackageFlag
flag of
    HidePackage String
p   -> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"-hide-package " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
p
    ExposePackage String
doc PackageArg
_ ModRenaming
_ -> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
doc

pprTrustFlag :: TrustFlag -> SDoc
pprTrustFlag :: TrustFlag -> SDoc
pprTrustFlag TrustFlag
flag = case TrustFlag
flag of
    TrustPackage String
p    -> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"-trust " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
p
    DistrustPackage String
p -> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"-distrust " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
p

-- -----------------------------------------------------------------------------
-- Wired-in units
--
-- See Note [Wired-in units] in GHC.Unit.Types

type WiringMap = UniqMap UnitId UnitId

findWiredInUnits
   :: Logger
   -> UnitPrecedenceMap
   -> [UnitInfo]           -- database
   -> VisibilityMap             -- info on what units are visible
                                -- for wired in selection
   -> IO ([UnitInfo],  -- unit database updated for wired in
          WiringMap)   -- map from unit id to wired identity

findWiredInUnits :: Logger
-> UnitPrecedenceMap
-> [UnitInfo]
-> VisibilityMap
-> IO ([UnitInfo], UniqMap UnitId UnitId)
findWiredInUnits Logger
logger UnitPrecedenceMap
prec_map [UnitInfo]
pkgs VisibilityMap
vis_map = do
  -- Now we must find our wired-in units, and rename them to
  -- their canonical names (eg. base-1.0 ==> base), as described
  -- in Note [Wired-in units] in GHC.Unit.Types
  let
        matches :: UnitInfo -> UnitId -> Bool
        UnitInfo
pc matches :: UnitInfo -> UnitId -> Bool
`matches` UnitId
pid = UnitInfo -> PackageName
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> srcpkgname
unitPackageName UnitInfo
pc PackageName -> PackageName -> Bool
forall a. Eq a => a -> a -> Bool
== FastString -> PackageName
PackageName (UnitId -> FastString
unitIdFS UnitId
pid)

        -- find which package corresponds to each wired-in package
        -- delete any other packages with the same name
        -- update the package and any dependencies to point to the new
        -- one.
        --
        -- When choosing which package to map to a wired-in package
        -- name, we try to pick the latest version of exposed packages.
        -- However, if there are no exposed wired in packages available
        -- (e.g. -hide-all-packages was used), we can't bail: we *have*
        -- to assign a package for the wired-in package: so we try again
        -- with hidden packages included to (and pick the latest
        -- version).
        --
        -- You can also override the default choice by using -ignore-package:
        -- this works even when there is no exposed wired in package
        -- available.
        --
        findWiredInUnit :: [UnitInfo] -> UnitId -> IO (Maybe (UnitId, UnitInfo))
        findWiredInUnit :: [UnitInfo] -> UnitId -> IO (Maybe (UnitId, UnitInfo))
findWiredInUnit [UnitInfo]
pkgs UnitId
wired_pkg = [IO (Maybe (UnitId, UnitInfo))] -> IO (Maybe (UnitId, UnitInfo))
forall (m :: * -> *) (f :: * -> *) a.
(Monad m, Foldable f) =>
f (m (Maybe a)) -> m (Maybe a)
firstJustsM [[UnitInfo] -> IO (Maybe (UnitId, UnitInfo))
try [UnitInfo]
all_exposed_ps, [UnitInfo] -> IO (Maybe (UnitId, UnitInfo))
try [UnitInfo]
all_ps, IO (Maybe (UnitId, UnitInfo))
notfound]
          where
                all_ps :: [UnitInfo]
all_ps = [ UnitInfo
p | UnitInfo
p <- [UnitInfo]
pkgs, UnitInfo
p UnitInfo -> UnitId -> Bool
`matches` UnitId
wired_pkg ]
                all_exposed_ps :: [UnitInfo]
all_exposed_ps = [ UnitInfo
p | UnitInfo
p <- [UnitInfo]
all_ps, (UnitInfo -> Unit
mkUnit UnitInfo
p) Unit -> VisibilityMap -> Bool
forall k a. Uniquable k => k -> UniqMap k a -> Bool
`elemUniqMap` VisibilityMap
vis_map ]

                try :: [UnitInfo] -> IO (Maybe (UnitId, UnitInfo))
try [UnitInfo]
ps = case UnitPrecedenceMap -> [UnitInfo] -> [UnitInfo]
sortByPreference UnitPrecedenceMap
prec_map [UnitInfo]
ps of
                    UnitInfo
p:[UnitInfo]
_ -> (UnitId, UnitInfo) -> Maybe (UnitId, UnitInfo)
forall a. a -> Maybe a
Just ((UnitId, UnitInfo) -> Maybe (UnitId, UnitInfo))
-> IO (UnitId, UnitInfo) -> IO (Maybe (UnitId, UnitInfo))
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> UnitInfo -> IO (UnitId, UnitInfo)
pick UnitInfo
p
                    [UnitInfo]
_ -> Maybe (UnitId, UnitInfo) -> IO (Maybe (UnitId, UnitInfo))
forall a. a -> IO a
forall (f :: * -> *) a. Applicative f => a -> f a
pure Maybe (UnitId, UnitInfo)
forall a. Maybe a
Nothing

                notfound :: IO (Maybe (UnitId, UnitInfo))
notfound = do
                          Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
                            String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"wired-in package "
                                 SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext (UnitId -> FastString
unitIdFS UnitId
wired_pkg)
                                 SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
" not found."
                          Maybe (UnitId, UnitInfo) -> IO (Maybe (UnitId, UnitInfo))
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe (UnitId, UnitInfo)
forall a. Maybe a
Nothing
                pick :: UnitInfo -> IO (UnitId, UnitInfo)
                pick :: UnitInfo -> IO (UnitId, UnitInfo)
pick UnitInfo
pkg = do
                        Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
                            String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"wired-in package "
                                 SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext (UnitId -> FastString
unitIdFS UnitId
wired_pkg)
                                 SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
" mapped to "
                                 SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg)
                        (UnitId, UnitInfo) -> IO (UnitId, UnitInfo)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (UnitId
wired_pkg, UnitInfo
pkg)


  mb_wired_in_pkgs <- (UnitId -> IO (Maybe (UnitId, UnitInfo)))
-> [UnitId] -> IO [Maybe (UnitId, UnitInfo)]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM ([UnitInfo] -> UnitId -> IO (Maybe (UnitId, UnitInfo))
findWiredInUnit [UnitInfo]
pkgs) [UnitId]
wiredInUnitIds
  let
        wired_in_pkgs = [Maybe (UnitId, UnitInfo)] -> [(UnitId, UnitInfo)]
forall a. [Maybe a] -> [a]
catMaybes [Maybe (UnitId, UnitInfo)]
mb_wired_in_pkgs

        wiredInMap :: UniqMap UnitId UnitId
        wiredInMap = [(UnitId, UnitId)] -> UniqMap UnitId UnitId
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap
          [ (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
realUnitInfo, UnitId
wiredInUnitId)
          | (UnitId
wiredInUnitId, UnitInfo
realUnitInfo) <- [(UnitId, UnitInfo)]
wired_in_pkgs
          , Bool -> Bool
not (UnitInfo -> Bool
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
unitIsIndefinite UnitInfo
realUnitInfo)
          ]

        updateWiredInDependencies [GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module]
pkgs = (GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
 -> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module)
-> [GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module]
-> [GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module]
forall a b. (a -> b) -> [a] -> [b]
map (GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
forall {srcpkgid} {srcpkgname} {modulename}.
GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
upd_deps (GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
 -> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module)
-> (GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
    -> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module)
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
forall b c a. (b -> c) -> (a -> b) -> a -> c
. GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
forall {srcpkgid} {srcpkgname} {modulename} {mod}.
GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
upd_pkg) [GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module]
pkgs
          where upd_pkg :: GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
upd_pkg GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
pkg
                  | Just UnitId
wiredInUnitId <- UniqMap UnitId UnitId -> UnitId -> Maybe UnitId
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UniqMap UnitId UnitId
wiredInMap (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
pkg)
                  = GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
pkg { unitId         = wiredInUnitId
                        , unitInstanceOf = wiredInUnitId
                           -- every non instantiated unit is an instance of
                           -- itself (required by Backpack...)
                           --
                           -- See Note [About units] in GHC.Unit
                        }
                  | Bool
otherwise
                  = GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
pkg
                upd_deps :: GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
-> GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
upd_deps GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
pkg = GenericUnitInfo srcpkgid srcpkgname UnitId modulename Module
pkg {
                      unitDepends = map (upd_wired_in wiredInMap) (unitDepends pkg),
                      unitExposedModules
                        = map (\(modulename
k,Maybe Module
v) -> (modulename
k, (Module -> Module) -> Maybe Module -> Maybe Module
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (UniqMap UnitId UnitId -> Module -> Module
upd_wired_in_mod UniqMap UnitId UnitId
wiredInMap) Maybe Module
v))
                              (unitExposedModules pkg)
                    }


  return (updateWiredInDependencies pkgs, wiredInMap)

-- Helper functions for rewiring Module and Unit.  These
-- rewrite Units of modules in wired-in packages to the form known to the
-- compiler, as described in Note [Wired-in units] in GHC.Unit.Types.
--
-- For instance, base-4.9.0.0 will be rewritten to just base, to match
-- what appears in GHC.Builtin.Names.

upd_wired_in_mod :: WiringMap -> Module -> Module
upd_wired_in_mod :: UniqMap UnitId UnitId -> Module -> Module
upd_wired_in_mod UniqMap UnitId UnitId
wiredInMap (Module Unit
uid ModuleName
m) = Unit -> ModuleName -> Module
forall unit. unit -> ModuleName -> GenModule unit
Module (UniqMap UnitId UnitId -> Unit -> Unit
upd_wired_in_uid UniqMap UnitId UnitId
wiredInMap Unit
uid) ModuleName
m

upd_wired_in_uid :: WiringMap -> Unit -> Unit
upd_wired_in_uid :: UniqMap UnitId UnitId -> Unit -> Unit
upd_wired_in_uid UniqMap UnitId UnitId
wiredInMap Unit
u = case Unit
u of
   Unit
HoleUnit -> Unit
forall uid. GenUnit uid
HoleUnit
   RealUnit (Definite UnitId
uid) -> Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite (UniqMap UnitId UnitId -> UnitId -> UnitId
upd_wired_in UniqMap UnitId UnitId
wiredInMap UnitId
uid))
   VirtUnit GenInstantiatedUnit UnitId
indef_uid ->
      GenInstantiatedUnit UnitId -> Unit
forall uid. GenInstantiatedUnit uid -> GenUnit uid
VirtUnit (GenInstantiatedUnit UnitId -> Unit)
-> GenInstantiatedUnit UnitId -> Unit
forall a b. (a -> b) -> a -> b
$ UnitId -> [(ModuleName, Module)] -> GenInstantiatedUnit UnitId
forall u.
IsUnitId u =>
u -> GenInstantiations u -> GenInstantiatedUnit u
mkInstantiatedUnit
        (GenInstantiatedUnit UnitId -> UnitId
forall unit. GenInstantiatedUnit unit -> unit
instUnitInstanceOf GenInstantiatedUnit UnitId
indef_uid)
        (((ModuleName, Module) -> (ModuleName, Module))
-> [(ModuleName, Module)] -> [(ModuleName, Module)]
forall a b. (a -> b) -> [a] -> [b]
map (\(ModuleName
x,Module
y) -> (ModuleName
x,UniqMap UnitId UnitId -> Module -> Module
upd_wired_in_mod UniqMap UnitId UnitId
wiredInMap Module
y)) (GenInstantiatedUnit UnitId -> [(ModuleName, Module)]
forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts GenInstantiatedUnit UnitId
indef_uid))

upd_wired_in :: WiringMap -> UnitId -> UnitId
upd_wired_in :: UniqMap UnitId UnitId -> UnitId -> UnitId
upd_wired_in UniqMap UnitId UnitId
wiredInMap UnitId
key
    | Just UnitId
key' <- UniqMap UnitId UnitId -> UnitId -> Maybe UnitId
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UniqMap UnitId UnitId
wiredInMap UnitId
key = UnitId
key'
    | Bool
otherwise = UnitId
key

updateVisibilityMap :: WiringMap -> VisibilityMap -> VisibilityMap
updateVisibilityMap :: UniqMap UnitId UnitId -> VisibilityMap -> VisibilityMap
updateVisibilityMap UniqMap UnitId UnitId
wiredInMap VisibilityMap
vis_map = (VisibilityMap -> (UnitId, UnitId) -> VisibilityMap)
-> VisibilityMap -> [(UnitId, UnitId)] -> VisibilityMap
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' VisibilityMap -> (UnitId, UnitId) -> VisibilityMap
f VisibilityMap
vis_map (UniqMap UnitId UnitId -> [(UnitId, UnitId)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap UnitId UnitId
wiredInMap)
  where f :: VisibilityMap -> (UnitId, UnitId) -> VisibilityMap
f VisibilityMap
vm (UnitId
from, UnitId
to) = case VisibilityMap -> Unit -> Maybe UnitVisibility
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap VisibilityMap
vis_map (Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite UnitId
from)) of
                    Maybe UnitVisibility
Nothing -> VisibilityMap
vm
                    Just UnitVisibility
r -> VisibilityMap -> Unit -> UnitVisibility -> VisibilityMap
forall k a. Uniquable k => UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap (VisibilityMap -> Unit -> VisibilityMap
forall k a. Uniquable k => UniqMap k a -> k -> UniqMap k a
delFromUniqMap VisibilityMap
vm (Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite UnitId
from)))
                              (Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite UnitId
to)) UnitVisibility
r

  -- ----------------------------------------------------------------------------

-- | The reason why a unit is unusable.
data UnusableUnitReason
  = -- | We ignored it explicitly using @-ignore-package@.
    IgnoredWithFlag
    -- | This unit transitively depends on a unit that was never present
    -- in any of the provided databases.
  | BrokenDependencies   [UnitId]
    -- | This unit transitively depends on a unit involved in a cycle.
    -- Note that the list of 'UnitId' reports the direct dependencies
    -- of this unit that (transitively) depended on the cycle, and not
    -- the actual cycle itself (which we report separately at high verbosity.)
  | CyclicDependencies   [UnitId]
    -- | This unit transitively depends on a unit which was ignored.
  | IgnoredDependencies  [UnitId]
    -- | This unit transitively depends on a unit which was
    -- shadowed by an ABI-incompatible unit.
  | ShadowedDependencies [UnitId]

instance Outputable UnusableUnitReason where
    ppr :: UnusableUnitReason -> SDoc
ppr UnusableUnitReason
IgnoredWithFlag = String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"[ignored with flag]"
    ppr (BrokenDependencies [UnitId]
uids)   = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"broken" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> [UnitId] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
uids)
    ppr (CyclicDependencies [UnitId]
uids)   = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"cyclic" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> [UnitId] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
uids)
    ppr (IgnoredDependencies [UnitId]
uids)  = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"ignored" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> [UnitId] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
uids)
    ppr (ShadowedDependencies [UnitId]
uids) = SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
brackets (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"shadowed" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> [UnitId] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
uids)

type UnusableUnits = UniqMap UnitId (UnitInfo, UnusableUnitReason)

pprReason :: SDoc -> UnusableUnitReason -> SDoc
pprReason :: SDoc -> UnusableUnitReason -> SDoc
pprReason SDoc
pref UnusableUnitReason
reason = case UnusableUnitReason
reason of
  UnusableUnitReason
IgnoredWithFlag ->
      SDoc
pref SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"ignored due to an -ignore-package flag"
  BrokenDependencies [UnitId]
deps ->
      SDoc
pref SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"unusable due to missing dependencies:" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
        Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hsep ((UnitId -> SDoc) -> [UnitId] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
deps))
  CyclicDependencies [UnitId]
deps ->
      SDoc
pref SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"unusable due to cyclic dependencies:" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
        Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hsep ((UnitId -> SDoc) -> [UnitId] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
deps))
  IgnoredDependencies [UnitId]
deps ->
      SDoc
pref SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text (String
"unusable because the -ignore-package flag was used to " String -> String -> String
forall a. [a] -> [a] -> [a]
++
                     String
"ignore at least one of its dependencies:") SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
        Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hsep ((UnitId -> SDoc) -> [UnitId] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
deps))
  ShadowedDependencies [UnitId]
deps ->
      SDoc
pref SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"unusable due to shadowed dependencies:" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
        Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hsep ((UnitId -> SDoc) -> [UnitId] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr [UnitId]
deps))

reportCycles :: Logger -> [SCC UnitInfo] -> IO ()
reportCycles :: Logger -> [SCC UnitInfo] -> IO ()
reportCycles Logger
logger [SCC UnitInfo]
sccs = (SCC UnitInfo -> IO ()) -> [SCC UnitInfo] -> IO ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ SCC UnitInfo -> IO ()
report [SCC UnitInfo]
sccs
  where
    report :: SCC UnitInfo -> IO ()
report (AcyclicSCC UnitInfo
_) = () -> IO ()
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
    report (CyclicSCC [UnitInfo]
vs) =
        Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
          String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"these packages are involved in a cycle:" SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
            Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
forall doc. IsLine doc => [doc] -> doc
hsep ((UnitInfo -> SDoc) -> [UnitInfo] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr (UnitId -> SDoc) -> (UnitInfo -> UnitId) -> UnitInfo -> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId) [UnitInfo]
vs))

reportUnusable :: Logger -> UnusableUnits -> IO ()
reportUnusable :: Logger -> UnusableUnits -> IO ()
reportUnusable Logger
logger UnusableUnits
pkgs = ((UnitId, (UnitInfo, UnusableUnitReason)) -> IO ())
-> [(UnitId, (UnitInfo, UnusableUnitReason))] -> IO ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ (UnitId, (UnitInfo, UnusableUnitReason)) -> IO ()
report (UnusableUnits -> [(UnitId, (UnitInfo, UnusableUnitReason))]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UnusableUnits
pkgs)
  where
    report :: (UnitId, (UnitInfo, UnusableUnitReason)) -> IO ()
report (UnitId
ipid, (UnitInfo
_, UnusableUnitReason
reason)) =
       Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
         SDoc -> UnusableUnitReason -> SDoc
pprReason
           (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"package" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
ipid SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"is") UnusableUnitReason
reason

-- ----------------------------------------------------------------------------
--
-- Utilities on the database
--

-- | A reverse dependency index, mapping an 'UnitId' to
-- the 'UnitId's which have a dependency on it.
type RevIndex = UniqMap UnitId [UnitId]

-- | Compute the reverse dependency index of a unit database.
reverseDeps :: UnitInfoMap -> RevIndex
reverseDeps :: UnitInfoMap -> RevIndex
reverseDeps UnitInfoMap
db = ((UnitId, UnitInfo) -> RevIndex -> RevIndex)
-> RevIndex -> UnitInfoMap -> RevIndex
forall k a b. ((k, a) -> b -> b) -> b -> UniqMap k a -> b
nonDetFoldUniqMap (UnitId, UnitInfo) -> RevIndex -> RevIndex
go RevIndex
forall k a. UniqMap k a
emptyUniqMap UnitInfoMap
db
  where
    go :: (UnitId, UnitInfo) -> RevIndex -> RevIndex
    go :: (UnitId, UnitInfo) -> RevIndex -> RevIndex
go (UnitId
_uid, UnitInfo
pkg) RevIndex
r = (RevIndex -> UnitId -> RevIndex)
-> RevIndex -> [UnitId] -> RevIndex
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' (UnitId -> RevIndex -> UnitId -> RevIndex
forall {k} {a}.
Uniquable k =>
a -> UniqMap k [a] -> k -> UniqMap k [a]
go' (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg)) RevIndex
r (UnitInfo -> [UnitId]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> [uid]
unitDepends UnitInfo
pkg)
    go' :: a -> UniqMap k [a] -> k -> UniqMap k [a]
go' a
from UniqMap k [a]
r k
to = ([a] -> [a] -> [a]) -> UniqMap k [a] -> k -> [a] -> UniqMap k [a]
forall k a.
Uniquable k =>
(a -> a -> a) -> UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap_C [a] -> [a] -> [a]
forall a. [a] -> [a] -> [a]
(++) UniqMap k [a]
r k
to [a
from]

-- | Given a list of 'UnitId's to remove, a database,
-- and a reverse dependency index (as computed by 'reverseDeps'),
-- remove those units, plus any units which depend on them.
-- Returns the pruned database, as well as a list of 'UnitInfo's
-- that was removed.
removeUnits :: [UnitId] -> RevIndex
               -> UnitInfoMap
               -> (UnitInfoMap, [UnitInfo])
removeUnits :: [UnitId] -> RevIndex -> UnitInfoMap -> (UnitInfoMap, [UnitInfo])
removeUnits [UnitId]
uids RevIndex
index UnitInfoMap
m = [UnitId] -> (UnitInfoMap, [UnitInfo]) -> (UnitInfoMap, [UnitInfo])
go [UnitId]
uids (UnitInfoMap
m,[])
  where
    go :: [UnitId] -> (UnitInfoMap, [UnitInfo]) -> (UnitInfoMap, [UnitInfo])
go [] (UnitInfoMap
m,[UnitInfo]
pkgs) = (UnitInfoMap
m,[UnitInfo]
pkgs)
    go (UnitId
uid:[UnitId]
uids) (UnitInfoMap
m,[UnitInfo]
pkgs)
        | Just UnitInfo
pkg <- UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
m UnitId
uid
        = case RevIndex -> UnitId -> Maybe [UnitId]
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap RevIndex
index UnitId
uid of
            Maybe [UnitId]
Nothing    -> [UnitId] -> (UnitInfoMap, [UnitInfo]) -> (UnitInfoMap, [UnitInfo])
go [UnitId]
uids (UnitInfoMap -> UnitId -> UnitInfoMap
forall k a. Uniquable k => UniqMap k a -> k -> UniqMap k a
delFromUniqMap UnitInfoMap
m UnitId
uid, UnitInfo
pkgUnitInfo -> [UnitInfo] -> [UnitInfo]
forall a. a -> [a] -> [a]
:[UnitInfo]
pkgs)
            Just [UnitId]
rdeps -> [UnitId] -> (UnitInfoMap, [UnitInfo]) -> (UnitInfoMap, [UnitInfo])
go ([UnitId]
rdeps [UnitId] -> [UnitId] -> [UnitId]
forall a. [a] -> [a] -> [a]
++ [UnitId]
uids) (UnitInfoMap -> UnitId -> UnitInfoMap
forall k a. Uniquable k => UniqMap k a -> k -> UniqMap k a
delFromUniqMap UnitInfoMap
m UnitId
uid, UnitInfo
pkgUnitInfo -> [UnitInfo] -> [UnitInfo]
forall a. a -> [a] -> [a]
:[UnitInfo]
pkgs)
        | Bool
otherwise
        = [UnitId] -> (UnitInfoMap, [UnitInfo]) -> (UnitInfoMap, [UnitInfo])
go [UnitId]
uids (UnitInfoMap
m,[UnitInfo]
pkgs)

-- | Given a 'UnitInfo' from some 'UnitInfoMap', return all entries in 'depends'
-- which correspond to units that do not exist in the index.
depsNotAvailable :: UnitInfoMap
                 -> UnitInfo
                 -> [UnitId]
depsNotAvailable :: UnitInfoMap -> UnitInfo -> [UnitId]
depsNotAvailable UnitInfoMap
pkg_map UnitInfo
pkg = (UnitId -> Bool) -> [UnitId] -> [UnitId]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (UnitId -> Bool) -> UnitId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (UnitId -> UnitInfoMap -> Bool
forall k a. Uniquable k => k -> UniqMap k a -> Bool
`elemUniqMap` UnitInfoMap
pkg_map)) (UnitInfo -> [UnitId]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> [uid]
unitDepends UnitInfo
pkg)

-- | Given a 'UnitInfo' from some 'UnitInfoMap' return all entries in
-- 'unitAbiDepends' which correspond to units that do not exist, OR have
-- mismatching ABIs.
depsAbiMismatch :: UnitInfoMap
                -> UnitInfo
                -> [UnitId]
depsAbiMismatch :: UnitInfoMap -> UnitInfo -> [UnitId]
depsAbiMismatch UnitInfoMap
pkg_map UnitInfo
pkg = ((UnitId, ShortText) -> UnitId)
-> [(UnitId, ShortText)] -> [UnitId]
forall a b. (a -> b) -> [a] -> [b]
map (UnitId, ShortText) -> UnitId
forall a b. (a, b) -> a
fst ([(UnitId, ShortText)] -> [UnitId])
-> ([(UnitId, ShortText)] -> [(UnitId, ShortText)])
-> [(UnitId, ShortText)]
-> [UnitId]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((UnitId, ShortText) -> Bool)
-> [(UnitId, ShortText)] -> [(UnitId, ShortText)]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool)
-> ((UnitId, ShortText) -> Bool) -> (UnitId, ShortText) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (UnitId, ShortText) -> Bool
abiMatch) ([(UnitId, ShortText)] -> [UnitId])
-> [(UnitId, ShortText)] -> [UnitId]
forall a b. (a -> b) -> a -> b
$ UnitInfo -> [(UnitId, ShortText)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(uid, ShortText)]
unitAbiDepends UnitInfo
pkg
  where
    abiMatch :: (UnitId, ShortText) -> Bool
abiMatch (UnitId
dep_uid, ShortText
abi)
        | Just UnitInfo
dep_pkg <- UnitInfoMap -> UnitId -> Maybe UnitInfo
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap UnitInfoMap
pkg_map UnitId
dep_uid
        = UnitInfo -> ShortText
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> ShortText
unitAbiHash UnitInfo
dep_pkg ShortText -> ShortText -> Bool
forall a. Eq a => a -> a -> Bool
== ShortText
abi
        | Bool
otherwise
        = Bool
False

-- -----------------------------------------------------------------------------
-- Ignore units

ignoreUnits :: [IgnorePackageFlag] -> [UnitInfo] -> UnusableUnits
ignoreUnits :: [IgnorePackageFlag] -> [UnitInfo] -> UnusableUnits
ignoreUnits [IgnorePackageFlag]
flags [UnitInfo]
pkgs = [(UnitId, (UnitInfo, UnusableUnitReason))] -> UnusableUnits
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap ((IgnorePackageFlag -> [(UnitId, (UnitInfo, UnusableUnitReason))])
-> [IgnorePackageFlag]
-> [(UnitId, (UnitInfo, UnusableUnitReason))]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap IgnorePackageFlag -> [(UnitId, (UnitInfo, UnusableUnitReason))]
doit [IgnorePackageFlag]
flags)
  where
  doit :: IgnorePackageFlag -> [(UnitId, (UnitInfo, UnusableUnitReason))]
doit (IgnorePackage String
str) =
     case (UnitInfo -> Bool) -> [UnitInfo] -> ([UnitInfo], [UnitInfo])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition (String -> UnitInfo -> Bool
matchingStr String
str) [UnitInfo]
pkgs of
         ([UnitInfo]
ps, [UnitInfo]
_) -> [ (UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
p, (UnitInfo
p, UnusableUnitReason
IgnoredWithFlag))
                    | UnitInfo
p <- [UnitInfo]
ps ]
        -- missing unit is not an error for -ignore-package,
        -- because a common usage is to -ignore-package P as
        -- a preventative measure just in case P exists.

-- ----------------------------------------------------------------------------
--
-- Merging databases
--

-- | For each unit, a mapping from uid -> i indicates that this
-- unit was brought into GHC by the ith @-package-db@ flag on
-- the command line.  We use this mapping to make sure we prefer
-- units that were defined later on the command line, if there
-- is an ambiguity.
type UnitPrecedenceMap = UniqMap UnitId Int

-- | Given a list of databases, merge them together, where
-- units with the same unit id in later databases override
-- earlier ones.  This does NOT check if the resulting database
-- makes sense (that's done by 'validateDatabase').
mergeDatabases :: Logger -> [UnitDatabase UnitId]
               -> IO (UnitInfoMap, UnitPrecedenceMap)
mergeDatabases :: Logger
-> [UnitDatabase UnitId] -> IO (UnitInfoMap, UnitPrecedenceMap)
mergeDatabases Logger
logger = ((UnitInfoMap, UnitPrecedenceMap)
 -> (Int, UnitDatabase UnitId)
 -> IO (UnitInfoMap, UnitPrecedenceMap))
-> (UnitInfoMap, UnitPrecedenceMap)
-> [(Int, UnitDatabase UnitId)]
-> IO (UnitInfoMap, UnitPrecedenceMap)
forall (t :: * -> *) (m :: * -> *) b a.
(Foldable t, Monad m) =>
(b -> a -> m b) -> b -> t a -> m b
foldM (UnitInfoMap, UnitPrecedenceMap)
-> (Int, UnitDatabase UnitId)
-> IO (UnitInfoMap, UnitPrecedenceMap)
merge (UnitInfoMap
forall k a. UniqMap k a
emptyUniqMap, UnitPrecedenceMap
forall k a. UniqMap k a
emptyUniqMap) ([(Int, UnitDatabase UnitId)]
 -> IO (UnitInfoMap, UnitPrecedenceMap))
-> ([UnitDatabase UnitId] -> [(Int, UnitDatabase UnitId)])
-> [UnitDatabase UnitId]
-> IO (UnitInfoMap, UnitPrecedenceMap)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. [Int] -> [UnitDatabase UnitId] -> [(Int, UnitDatabase UnitId)]
forall a b. [a] -> [b] -> [(a, b)]
zip [Int
1..]
  where
    merge :: (UnitInfoMap, UnitPrecedenceMap)
-> (Int, UnitDatabase UnitId)
-> IO (UnitInfoMap, UnitPrecedenceMap)
merge (UnitInfoMap
pkg_map, UnitPrecedenceMap
prec_map) (Int
i, UnitDatabase String
db_path [UnitInfo]
db) = do
      Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
          String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"loading package database" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
db_path
      [UnitId] -> (UnitId -> IO ()) -> IO ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (Set UnitId -> [UnitId]
forall a. Set a -> [a]
Set.toList Set UnitId
override_set) ((UnitId -> IO ()) -> IO ()) -> (UnitId -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \UnitId
pkg ->
          Logger -> Int -> SDoc -> IO ()
debugTraceMsg Logger
logger Int
2 (SDoc -> IO ()) -> SDoc -> IO ()
forall a b. (a -> b) -> a -> b
$
              String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"package" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
pkg SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
              String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"overrides a previously defined package"
      (UnitInfoMap, UnitPrecedenceMap)
-> IO (UnitInfoMap, UnitPrecedenceMap)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (UnitInfoMap
pkg_map', UnitPrecedenceMap
prec_map')
     where
      db_map :: UnitInfoMap
db_map = [UnitInfo] -> UnitInfoMap
forall {srcpkgid} {srcpkgname} {modulename} {mod}.
[GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod]
-> UniqMap
     UnitId (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)
mk_pkg_map [UnitInfo]
db
      mk_pkg_map :: [GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod]
-> UniqMap
     UnitId (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)
mk_pkg_map = [(UnitId,
  GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)]
-> UniqMap
     UnitId (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap ([(UnitId,
   GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)]
 -> UniqMap
      UnitId (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod))
-> ([GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod]
    -> [(UnitId,
         GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)])
-> [GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod]
-> UniqMap
     UnitId (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
 -> (UnitId,
     GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod))
-> [GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod]
-> [(UnitId,
     GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod)]
forall a b. (a -> b) -> [a] -> [b]
map (\GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
p -> (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
p, GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
p))

      -- The set of UnitIds which appear in both db and pkgs.  These are the
      -- ones that get overridden.  Compute this just to give some
      -- helpful debug messages at -v2
      override_set :: Set UnitId
      override_set :: Set UnitId
override_set = Set UnitId -> Set UnitId -> Set UnitId
forall a. Ord a => Set a -> Set a -> Set a
Set.intersection (UnitInfoMap -> Set UnitId
forall k a. Ord k => UniqMap k a -> Set k
nonDetUniqMapToKeySet UnitInfoMap
db_map)
                                      (UnitInfoMap -> Set UnitId
forall k a. Ord k => UniqMap k a -> Set k
nonDetUniqMapToKeySet UnitInfoMap
pkg_map)

      -- Now merge the sets together (NB: in case of duplicate,
      -- first argument preferred)
      pkg_map' :: UnitInfoMap
      pkg_map' :: UnitInfoMap
pkg_map' = UnitInfoMap
pkg_map UnitInfoMap -> UnitInfoMap -> UnitInfoMap
forall k a. UniqMap k a -> UniqMap k a -> UniqMap k a
`plusUniqMap` UnitInfoMap
db_map

      prec_map' :: UnitPrecedenceMap
      prec_map' :: UnitPrecedenceMap
prec_map' = UnitPrecedenceMap
prec_map UnitPrecedenceMap -> UnitPrecedenceMap -> UnitPrecedenceMap
forall k a. UniqMap k a -> UniqMap k a -> UniqMap k a
`plusUniqMap` ((UnitInfo -> Int) -> UnitInfoMap -> UnitPrecedenceMap
forall a b k. (a -> b) -> UniqMap k a -> UniqMap k b
mapUniqMap (Int -> UnitInfo -> Int
forall a b. a -> b -> a
const Int
i) UnitInfoMap
db_map)

-- | Validates a database, removing unusable units from it
-- (this includes removing units that the user has explicitly
-- ignored.)  Our general strategy:
--
-- 1. Remove all broken units (dangling dependencies)
-- 2. Remove all units that are cyclic
-- 3. Apply ignore flags
-- 4. Remove all units which have deps with mismatching ABIs
--
validateDatabase :: UnitConfig -> UnitInfoMap
                 -> (UnitInfoMap, UnusableUnits, [SCC UnitInfo])
validateDatabase :: UnitConfig
-> UnitInfoMap -> (UnitInfoMap, UnusableUnits, [SCC UnitInfo])
validateDatabase UnitConfig
cfg UnitInfoMap
pkg_map1 =
    (UnitInfoMap
pkg_map5, UnusableUnits
unusable, [SCC UnitInfo]
sccs)
  where
    ignore_flags :: [IgnorePackageFlag]
ignore_flags = [IgnorePackageFlag] -> [IgnorePackageFlag]
forall a. [a] -> [a]
reverse (UnitConfig -> [IgnorePackageFlag]
unitConfigFlagsIgnored UnitConfig
cfg)

    -- Compute the reverse dependency index
    index :: RevIndex
index = UnitInfoMap -> RevIndex
reverseDeps UnitInfoMap
pkg_map1

    -- Helper function
    mk_unusable :: (t -> b)
-> (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t)
-> t
-> [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
mk_unusable t -> b
mk_err t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t
dep_matcher t
m [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
uids =
      [(k, (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b))]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap [ (GenericUnitInfo srcpkgid srcpkgname k modulename mod -> k
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname k modulename mod
pkg, (GenericUnitInfo srcpkgid srcpkgname k modulename mod
pkg, t -> b
mk_err (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t
dep_matcher t
m GenericUnitInfo srcpkgid srcpkgname k modulename mod
pkg)))
                    | GenericUnitInfo srcpkgid srcpkgname k modulename mod
pkg <- [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
uids
                    ]

    -- Find broken units
    directly_broken :: [UnitInfo]
directly_broken = (UnitInfo -> Bool) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (UnitInfo -> Bool) -> UnitInfo -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. [UnitId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null ([UnitId] -> Bool) -> (UnitInfo -> [UnitId]) -> UnitInfo -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfoMap -> UnitInfo -> [UnitId]
depsNotAvailable UnitInfoMap
pkg_map1)
                             (UnitInfoMap -> [UnitInfo]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnitInfoMap
pkg_map1)
    (UnitInfoMap
pkg_map2, [UnitInfo]
broken) = [UnitId] -> RevIndex -> UnitInfoMap -> (UnitInfoMap, [UnitInfo])
removeUnits ((UnitInfo -> UnitId) -> [UnitInfo] -> [UnitId]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId [UnitInfo]
directly_broken) RevIndex
index UnitInfoMap
pkg_map1
    unusable_broken :: UnusableUnits
unusable_broken = ([UnitId] -> UnusableUnitReason)
-> (UnitInfoMap -> UnitInfo -> [UnitId])
-> UnitInfoMap
-> [UnitInfo]
-> UnusableUnits
forall {k} {t} {b} {t} {srcpkgid} {srcpkgname} {modulename} {mod}.
Uniquable k =>
(t -> b)
-> (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t)
-> t
-> [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
mk_unusable [UnitId] -> UnusableUnitReason
BrokenDependencies UnitInfoMap -> UnitInfo -> [UnitId]
depsNotAvailable UnitInfoMap
pkg_map2 [UnitInfo]
broken

    -- Find recursive units
    sccs :: [SCC UnitInfo]
sccs = [(UnitInfo, UnitId, [UnitId])] -> [SCC UnitInfo]
forall key node. Ord key => [(node, key, [key])] -> [SCC node]
stronglyConnComp [ (UnitInfo
pkg, UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg, UnitInfo -> [UnitId]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> [uid]
unitDepends UnitInfo
pkg)
                            | UnitInfo
pkg <- UnitInfoMap -> [UnitInfo]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnitInfoMap
pkg_map2 ]
    getCyclicSCC :: SCC (GenericUnitInfo srcpkgid srcpkgname b modulename mod) -> [b]
getCyclicSCC (CyclicSCC [GenericUnitInfo srcpkgid srcpkgname b modulename mod]
vs) = (GenericUnitInfo srcpkgid srcpkgname b modulename mod -> b)
-> [GenericUnitInfo srcpkgid srcpkgname b modulename mod] -> [b]
forall a b. (a -> b) -> [a] -> [b]
map GenericUnitInfo srcpkgid srcpkgname b modulename mod -> b
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId [GenericUnitInfo srcpkgid srcpkgname b modulename mod]
vs
    getCyclicSCC (AcyclicSCC GenericUnitInfo srcpkgid srcpkgname b modulename mod
_) = []
    (UnitInfoMap
pkg_map3, [UnitInfo]
cyclic) = [UnitId] -> RevIndex -> UnitInfoMap -> (UnitInfoMap, [UnitInfo])
removeUnits ((SCC UnitInfo -> [UnitId]) -> [SCC UnitInfo] -> [UnitId]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap SCC UnitInfo -> [UnitId]
forall {srcpkgid} {srcpkgname} {b} {modulename} {mod}.
SCC (GenericUnitInfo srcpkgid srcpkgname b modulename mod) -> [b]
getCyclicSCC [SCC UnitInfo]
sccs) RevIndex
index UnitInfoMap
pkg_map2
    unusable_cyclic :: UnusableUnits
unusable_cyclic = ([UnitId] -> UnusableUnitReason)
-> (UnitInfoMap -> UnitInfo -> [UnitId])
-> UnitInfoMap
-> [UnitInfo]
-> UnusableUnits
forall {k} {t} {b} {t} {srcpkgid} {srcpkgname} {modulename} {mod}.
Uniquable k =>
(t -> b)
-> (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t)
-> t
-> [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
mk_unusable [UnitId] -> UnusableUnitReason
CyclicDependencies UnitInfoMap -> UnitInfo -> [UnitId]
depsNotAvailable UnitInfoMap
pkg_map3 [UnitInfo]
cyclic

    -- Apply ignore flags
    directly_ignored :: UnusableUnits
directly_ignored = [IgnorePackageFlag] -> [UnitInfo] -> UnusableUnits
ignoreUnits [IgnorePackageFlag]
ignore_flags (UnitInfoMap -> [UnitInfo]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnitInfoMap
pkg_map3)
    (UnitInfoMap
pkg_map4, [UnitInfo]
ignored) = [UnitId] -> RevIndex -> UnitInfoMap -> (UnitInfoMap, [UnitInfo])
removeUnits (UnusableUnits -> [UnitId]
forall k a. UniqMap k a -> [k]
nonDetKeysUniqMap UnusableUnits
directly_ignored) RevIndex
index UnitInfoMap
pkg_map3
    unusable_ignored :: UnusableUnits
unusable_ignored = ([UnitId] -> UnusableUnitReason)
-> (UnitInfoMap -> UnitInfo -> [UnitId])
-> UnitInfoMap
-> [UnitInfo]
-> UnusableUnits
forall {k} {t} {b} {t} {srcpkgid} {srcpkgname} {modulename} {mod}.
Uniquable k =>
(t -> b)
-> (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t)
-> t
-> [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
mk_unusable [UnitId] -> UnusableUnitReason
IgnoredDependencies UnitInfoMap -> UnitInfo -> [UnitId]
depsNotAvailable UnitInfoMap
pkg_map4 [UnitInfo]
ignored

    -- Knock out units whose dependencies don't agree with ABI
    -- (i.e., got invalidated due to shadowing)
    directly_shadowed :: [UnitInfo]
directly_shadowed = (UnitInfo -> Bool) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (UnitInfo -> Bool) -> UnitInfo -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. [UnitId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null ([UnitId] -> Bool) -> (UnitInfo -> [UnitId]) -> UnitInfo -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfoMap -> UnitInfo -> [UnitId]
depsAbiMismatch UnitInfoMap
pkg_map4)
                               (UnitInfoMap -> [UnitInfo]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap UnitInfoMap
pkg_map4)
    (UnitInfoMap
pkg_map5, [UnitInfo]
shadowed) = [UnitId] -> RevIndex -> UnitInfoMap -> (UnitInfoMap, [UnitInfo])
removeUnits ((UnitInfo -> UnitId) -> [UnitInfo] -> [UnitId]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId [UnitInfo]
directly_shadowed) RevIndex
index UnitInfoMap
pkg_map4
    unusable_shadowed :: UnusableUnits
unusable_shadowed = ([UnitId] -> UnusableUnitReason)
-> (UnitInfoMap -> UnitInfo -> [UnitId])
-> UnitInfoMap
-> [UnitInfo]
-> UnusableUnits
forall {k} {t} {b} {t} {srcpkgid} {srcpkgname} {modulename} {mod}.
Uniquable k =>
(t -> b)
-> (t -> GenericUnitInfo srcpkgid srcpkgname k modulename mod -> t)
-> t
-> [GenericUnitInfo srcpkgid srcpkgname k modulename mod]
-> UniqMap
     k (GenericUnitInfo srcpkgid srcpkgname k modulename mod, b)
mk_unusable [UnitId] -> UnusableUnitReason
ShadowedDependencies UnitInfoMap -> UnitInfo -> [UnitId]
depsAbiMismatch UnitInfoMap
pkg_map5 [UnitInfo]
shadowed

    -- combine all unusables. The order is important for shadowing.
    -- plusUniqMapList folds using plusUFM which is right biased (opposite of
    -- Data.Map.union) so the head of the list should be the least preferred
    unusable :: UnusableUnits
unusable = [UnusableUnits] -> UnusableUnits
forall k a. [UniqMap k a] -> UniqMap k a
plusUniqMapList [ UnusableUnits
unusable_shadowed
                               , UnusableUnits
unusable_cyclic
                               , UnusableUnits
unusable_broken
                               , UnusableUnits
unusable_ignored
                               , UnusableUnits
directly_ignored
                               ]

-- -----------------------------------------------------------------------------
-- When all the command-line options are in, we can process our unit
-- settings and populate the unit state.

mkUnitState
    :: Logger
    -> UnitConfig
    -> IO (UnitState,[UnitDatabase UnitId])
mkUnitState :: Logger -> UnitConfig -> IO (UnitState, [UnitDatabase UnitId])
mkUnitState Logger
logger UnitConfig
cfg = do
{-
   Plan.

   There are two main steps for making the package state:

    1. We want to build a single, unified package database based
       on all of the input databases, which upholds the invariant that
       there is only one package per any UnitId and there are no
       dangling dependencies.  We'll do this by merging, and
       then successively filtering out bad dependencies.

       a) Merge all the databases together.
          If an input database defines unit ID that is already in
          the unified database, that package SHADOWS the existing
          package in the current unified database.  Note that
          order is important: packages defined later in the list of
          command line arguments shadow those defined earlier.

       b) Remove all packages with missing dependencies, or
          mutually recursive dependencies.

       b) Remove packages selected by -ignore-package from input database

       c) Remove all packages which depended on packages that are now
          shadowed by an ABI-incompatible package

       d) report (with -v) any packages that were removed by steps 1-3

    2. We want to look at the flags controlling package visibility,
       and build a mapping of what module names are in scope and
       where they live.

       a) on the final, unified database, we apply -trust/-distrust
          flags directly, modifying the database so that the 'trusted'
          field has the correct value.

       b) we use the -package/-hide-package flags to compute a
          visibility map, stating what packages are "exposed" for
          the purposes of computing the module map.
          * if any flag refers to a package which was removed by 1-5, then
            we can give an error message explaining why
          * if -hide-all-packages was not specified, this step also
            hides packages which are superseded by later exposed packages
          * this step is done TWICE if -plugin-package/-hide-all-plugin-packages
            are used

       c) based on the visibility map, we pick wired packages and rewrite
          them to have the expected unitId.

       d) finally, using the visibility map and the package database,
          we build a mapping saying what every in scope module name points to.
-}

  -- if databases have not been provided, read the database flags
  raw_dbs <- case UnitConfig -> Maybe [UnitDatabase UnitId]
unitConfigDBCache UnitConfig
cfg of
               Maybe [UnitDatabase UnitId]
Nothing  -> Logger -> UnitConfig -> IO [UnitDatabase UnitId]
readUnitDatabases Logger
logger UnitConfig
cfg
               Just [UnitDatabase UnitId]
dbs -> [UnitDatabase UnitId] -> IO [UnitDatabase UnitId]
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return [UnitDatabase UnitId]
dbs

  -- distrust all units if the flag is set
  let distrust_all UnitDatabase UnitId
db = UnitDatabase UnitId
db { unitDatabaseUnits = distrustAllUnits (unitDatabaseUnits db) }
      dbs | UnitConfig -> Bool
unitConfigDistrustAll UnitConfig
cfg = (UnitDatabase UnitId -> UnitDatabase UnitId)
-> [UnitDatabase UnitId] -> [UnitDatabase UnitId]
forall a b. (a -> b) -> [a] -> [b]
map UnitDatabase UnitId -> UnitDatabase UnitId
distrust_all [UnitDatabase UnitId]
raw_dbs
          | Bool
otherwise                 = [UnitDatabase UnitId]
raw_dbs


  -- This, and the other reverse's that you will see, are due to the fact that
  -- packageFlags, pluginPackageFlags, etc. are all specified in *reverse* order
  -- than they are on the command line.
  let raw_other_flags = [PackageFlag] -> [PackageFlag]
forall a. [a] -> [a]
reverse (UnitConfig -> [PackageFlag]
unitConfigFlagsExposed UnitConfig
cfg)
      (hpt_flags, other_flags) = partition (selectHptFlag (unitConfigHomeUnits cfg)) raw_other_flags
  debugTraceMsg logger 2 $
      text "package flags" <+> ppr other_flags

  let home_unit_deps = Set UnitId -> [PackageFlag] -> Set UnitId
selectHomeUnits (UnitConfig -> Set UnitId
unitConfigHomeUnits UnitConfig
cfg) [PackageFlag]
hpt_flags

  -- Merge databases together, without checking validity
  (pkg_map1, prec_map) <- mergeDatabases logger dbs

  -- Now that we've merged everything together, prune out unusable
  -- packages.
  let (pkg_map2, unusable, sccs) = validateDatabase cfg pkg_map1

  reportCycles   logger sccs
  reportUnusable logger unusable

  -- Apply trust flags (these flags apply regardless of whether
  -- or not packages are visible or not)
  pkgs1 <- mayThrowUnitErr
            $ foldM (applyTrustFlag prec_map unusable)
                 (nonDetEltsUniqMap pkg_map2) (reverse (unitConfigFlagsTrusted cfg))
  let prelim_pkg_db = [UnitInfo] -> UnitInfoMap
mkUnitInfoMap [UnitInfo]
pkgs1

  --
  -- Calculate the initial set of units from package databases, prior to any package flags.
  --
  -- Conceptually, we select the latest versions of all valid (not unusable) *packages*
  -- (not units). This is empty if we have -hide-all-packages.
  --
  -- Then we create an initial visibility map with default visibilities for all
  -- exposed, definite units which belong to the latest valid packages.
  --
  let preferLater UnitInfo
unit UnitInfo
unit' =
        case UnitPrecedenceMap -> UnitInfo -> UnitInfo -> Ordering
compareByPreference UnitPrecedenceMap
prec_map UnitInfo
unit UnitInfo
unit' of
            Ordering
GT -> UnitInfo
unit
            Ordering
_  -> UnitInfo
unit'
      addIfMorePreferable UniqDFM FastString UnitInfo
m UnitInfo
unit = (UnitInfo -> UnitInfo -> UnitInfo)
-> UniqDFM FastString UnitInfo
-> FastString
-> UnitInfo
-> UniqDFM FastString UnitInfo
forall key elt.
Uniquable key =>
(elt -> elt -> elt)
-> UniqDFM key elt -> key -> elt -> UniqDFM key elt
addToUDFM_C UnitInfo -> UnitInfo -> UnitInfo
preferLater UniqDFM FastString UnitInfo
m (UnitInfo -> FastString
fsPackageName UnitInfo
unit) UnitInfo
unit
      -- This is the set of maximally preferable packages. In fact, it is a set of
      -- most preferable *units* keyed by package name, which act as stand-ins in
      -- for "a package in a database". We use units here because we don't have
      -- "a package in a database" as a type currently.
      mostPreferablePackageReps = if UnitConfig -> Bool
unitConfigHideAll UnitConfig
cfg
                    then UniqDFM FastString UnitInfo
forall {k} (key :: k) elt. UniqDFM key elt
emptyUDFM
                    else (UniqDFM FastString UnitInfo
 -> UnitInfo -> UniqDFM FastString UnitInfo)
-> UniqDFM FastString UnitInfo
-> [UnitInfo]
-> UniqDFM FastString UnitInfo
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' UniqDFM FastString UnitInfo
-> UnitInfo -> UniqDFM FastString UnitInfo
addIfMorePreferable UniqDFM FastString UnitInfo
forall {k} (key :: k) elt. UniqDFM key elt
emptyUDFM [UnitInfo]
pkgs1
      -- When exposing units, we want to consider all of those in the most preferable
      -- packages. We can implement that by looking for units that are equi-preferable
      -- with the most preferable unit for package. Being equi-preferable means that
      -- they must be in the same database, with the same version, and the same package name.
      --
      -- We must take care to consider all these units and not just the most
      -- preferable one, otherwise we can end up with problems like #16228.
      mostPreferable UnitInfo
u =
        case UniqDFM FastString UnitInfo -> FastString -> Maybe UnitInfo
forall key elt.
Uniquable key =>
UniqDFM key elt -> key -> Maybe elt
lookupUDFM UniqDFM FastString UnitInfo
mostPreferablePackageReps (UnitInfo -> FastString
fsPackageName UnitInfo
u) of
          Maybe UnitInfo
Nothing -> Bool
False
          Just UnitInfo
u' -> UnitPrecedenceMap -> UnitInfo -> UnitInfo -> Ordering
compareByPreference UnitPrecedenceMap
prec_map UnitInfo
u UnitInfo
u' Ordering -> Ordering -> Bool
forall a. Eq a => a -> a -> Bool
== Ordering
EQ
      vis_map1 = (VisibilityMap -> UnitInfo -> VisibilityMap)
-> VisibilityMap -> [UnitInfo] -> VisibilityMap
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' (\VisibilityMap
vm UnitInfo
p ->
                            -- Note: we NEVER expose indefinite packages by
                            -- default, because it's almost assuredly not
                            -- what you want (no mix-in linking has occurred).
                            if UnitInfo -> Bool
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
unitIsExposed UnitInfo
p Bool -> Bool -> Bool
&& Unit -> Bool
unitIsDefinite (UnitInfo -> Unit
mkUnit UnitInfo
p) Bool -> Bool -> Bool
&& UnitInfo -> Bool
mostPreferable UnitInfo
p
                               then VisibilityMap -> Unit -> UnitVisibility -> VisibilityMap
forall k a. Uniquable k => UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap VisibilityMap
vm (UnitInfo -> Unit
mkUnit UnitInfo
p)
                                               UnitVisibility {
                                                 uv_expose_all :: Bool
uv_expose_all = Bool
True,
                                                 uv_renamings :: [(ModuleName, ModuleName)]
uv_renamings = [],
                                                 uv_package_name :: First FastString
uv_package_name = Maybe FastString -> First FastString
forall a. Maybe a -> First a
First (FastString -> Maybe FastString
forall a. a -> Maybe a
Just (UnitInfo -> FastString
fsPackageName UnitInfo
p)),
                                                 uv_requirements :: UniqMap ModuleName (Set InstantiatedModule)
uv_requirements = UniqMap ModuleName (Set InstantiatedModule)
forall k a. UniqMap k a
emptyUniqMap,
                                                 uv_explicit :: Maybe PackageArg
uv_explicit = Maybe PackageArg
forall a. Maybe a
Nothing
                                               }
                               else VisibilityMap
vm)
                         VisibilityMap
forall k a. UniqMap k a
emptyUniqMap [UnitInfo]
pkgs1

  --
  -- Compute a visibility map according to the command-line flags (-package,
  -- -hide-package).  This needs to know about the unusable packages, since if a
  -- user tries to enable an unusable package, we should let them know.
  --
  vis_map2 <- mayThrowUnitErr
                $ foldM (applyPackageFlag prec_map prelim_pkg_db emptyUniqSet unusable
                        (unitConfigHideAll cfg) pkgs1)
                            vis_map1 other_flags

  --
  -- Sort out which packages are wired in. This has to be done last, since
  -- it modifies the unit ids of wired in packages, but when we process
  -- package arguments we need to key against the old versions.
  --
  (pkgs2, wired_map) <- findWiredInUnits logger prec_map pkgs1 vis_map2
  let pkg_db = [UnitInfo] -> UnitInfoMap
mkUnitInfoMap [UnitInfo]
pkgs2

  -- Update the visibility map, so we treat wired packages as visible.
  let vis_map = UniqMap UnitId UnitId -> VisibilityMap -> VisibilityMap
updateVisibilityMap UniqMap UnitId UnitId
wired_map VisibilityMap
vis_map2

  let hide_plugin_pkgs = UnitConfig -> Bool
unitConfigHideAllPlugins UnitConfig
cfg
  plugin_vis_map <-
    case unitConfigFlagsPlugins cfg of
        -- common case; try to share the old vis_map
        [] | Bool -> Bool
not Bool
hide_plugin_pkgs -> VisibilityMap -> IO VisibilityMap
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return VisibilityMap
vis_map
           | Bool
otherwise -> VisibilityMap -> IO VisibilityMap
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return VisibilityMap
forall k a. UniqMap k a
emptyUniqMap
        [PackageFlag]
_ -> do let plugin_vis_map1 :: VisibilityMap
plugin_vis_map1
                        | Bool
hide_plugin_pkgs = VisibilityMap
forall k a. UniqMap k a
emptyUniqMap
                        -- Use the vis_map PRIOR to wired in,
                        -- because otherwise applyPackageFlag
                        -- won't work.
                        | Bool
otherwise = VisibilityMap
vis_map2
                plugin_vis_map2
                    <- MaybeErr UnitErr VisibilityMap -> IO VisibilityMap
forall a. MaybeErr UnitErr a -> IO a
mayThrowUnitErr
                        (MaybeErr UnitErr VisibilityMap -> IO VisibilityMap)
-> MaybeErr UnitErr VisibilityMap -> IO VisibilityMap
forall a b. (a -> b) -> a -> b
$ (VisibilityMap -> PackageFlag -> MaybeErr UnitErr VisibilityMap)
-> VisibilityMap -> [PackageFlag] -> MaybeErr UnitErr VisibilityMap
forall (t :: * -> *) (m :: * -> *) b a.
(Foldable t, Monad m) =>
(b -> a -> m b) -> b -> t a -> m b
foldM (UnitPrecedenceMap
-> UnitInfoMap
-> PreloadUnitClosure
-> UnusableUnits
-> Bool
-> [UnitInfo]
-> VisibilityMap
-> PackageFlag
-> MaybeErr UnitErr VisibilityMap
applyPackageFlag UnitPrecedenceMap
prec_map UnitInfoMap
prelim_pkg_db PreloadUnitClosure
forall a. UniqSet a
emptyUniqSet UnusableUnits
unusable
                                Bool
hide_plugin_pkgs [UnitInfo]
pkgs1)
                             VisibilityMap
plugin_vis_map1
                             ([PackageFlag] -> [PackageFlag]
forall a. [a] -> [a]
reverse (UnitConfig -> [PackageFlag]
unitConfigFlagsPlugins UnitConfig
cfg))
                -- Updating based on wired in packages is mostly
                -- good hygiene, because it won't matter: no wired in
                -- package has a compiler plugin.
                -- TODO: If a wired in package had a compiler plugin,
                -- and you tried to pick different wired in packages
                -- with the plugin flags and the normal flags... what
                -- would happen?  I don't know!  But this doesn't seem
                -- likely to actually happen.
                return (updateVisibilityMap wired_map plugin_vis_map2)

  let pkgname_map = [(PackageName, UnitId)] -> UniqFM PackageName UnitId
forall key elt. Uniquable key => [(key, elt)] -> UniqFM key elt
listToUFM [ (UnitInfo -> PackageName
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> srcpkgname
unitPackageName UnitInfo
p, UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitInstanceOf UnitInfo
p)
                              | UnitInfo
p <- [UnitInfo]
pkgs2
                              ]
  -- The explicitUnits accurately reflects the set of units we have turned
  -- on; as such, it also is the only way one can come up with requirements.
  -- The requirement context is directly based off of this: we simply
  -- look for nested unit IDs that are directly fed holes: the requirements
  -- of those units are precisely the ones we need to track
  let explicit_pkgs = [(Unit
k, UnitVisibility -> Maybe PackageArg
uv_explicit UnitVisibility
v) | (Unit
k, UnitVisibility
v) <- VisibilityMap -> [(Unit, UnitVisibility)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList VisibilityMap
vis_map]
      req_ctx = (Set InstantiatedModule -> [InstantiatedModule])
-> UniqMap ModuleName (Set InstantiatedModule)
-> UniqMap ModuleName [InstantiatedModule]
forall a b k. (a -> b) -> UniqMap k a -> UniqMap k b
mapUniqMap (Set InstantiatedModule -> [InstantiatedModule]
forall a. Set a -> [a]
Set.toList)
              (UniqMap ModuleName (Set InstantiatedModule)
 -> UniqMap ModuleName [InstantiatedModule])
-> UniqMap ModuleName (Set InstantiatedModule)
-> UniqMap ModuleName [InstantiatedModule]
forall a b. (a -> b) -> a -> b
$ (Set InstantiatedModule
 -> Set InstantiatedModule -> Set InstantiatedModule)
-> [UniqMap ModuleName (Set InstantiatedModule)]
-> UniqMap ModuleName (Set InstantiatedModule)
forall a k. (a -> a -> a) -> [UniqMap k a] -> UniqMap k a
plusUniqMapListWith Set InstantiatedModule
-> Set InstantiatedModule -> Set InstantiatedModule
forall a. Ord a => Set a -> Set a -> Set a
Set.union ((UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule))
-> [UnitVisibility]
-> [UniqMap ModuleName (Set InstantiatedModule)]
forall a b. (a -> b) -> [a] -> [b]
map UnitVisibility -> UniqMap ModuleName (Set InstantiatedModule)
uv_requirements (VisibilityMap -> [UnitVisibility]
forall k a. UniqMap k a -> [a]
nonDetEltsUniqMap VisibilityMap
vis_map))


  --
  -- Here we build up a set of the packages mentioned in -package
  -- flags on the command line; these are called the "preload"
  -- packages.  we link these packages in eagerly.  The preload set
  -- should contain at least rts & base, which is why we pretend that
  -- the command line contains -package rts & -package base.
  --
  -- NB: preload IS important even for type-checking, because we
  -- need the correct include path to be set.
  --
  let preload1 = VisibilityMap -> [Unit]
forall k a. UniqMap k a -> [k]
nonDetKeysUniqMap ((UnitVisibility -> Bool) -> VisibilityMap -> VisibilityMap
forall a k. (a -> Bool) -> UniqMap k a -> UniqMap k a
filterUniqMap (Maybe PackageArg -> Bool
forall a. Maybe a -> Bool
isJust (Maybe PackageArg -> Bool)
-> (UnitVisibility -> Maybe PackageArg) -> UnitVisibility -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitVisibility -> Maybe PackageArg
uv_explicit) VisibilityMap
vis_map)

      -- add default preload units if they can be found in the db
      basicLinkedUnits = (UnitId -> Unit) -> [UnitId] -> [Unit]
forall a b. (a -> b) -> [a] -> [b]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (Definite UnitId -> Unit)
-> (UnitId -> Definite UnitId) -> UnitId -> Unit
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite)
                         ([UnitId] -> [Unit]) -> [UnitId] -> [Unit]
forall a b. (a -> b) -> a -> b
$ (UnitId -> Bool) -> [UnitId] -> [UnitId]
forall a. (a -> Bool) -> [a] -> [a]
filter ((UnitId -> UnitInfoMap -> Bool) -> UnitInfoMap -> UnitId -> Bool
forall a b c. (a -> b -> c) -> b -> a -> c
flip UnitId -> UnitInfoMap -> Bool
forall k a. Uniquable k => k -> UniqMap k a -> Bool
elemUniqMap UnitInfoMap
pkg_db)
                         ([UnitId] -> [UnitId]) -> [UnitId] -> [UnitId]
forall a b. (a -> b) -> a -> b
$ UnitConfig -> [UnitId]
unitConfigAutoLink UnitConfig
cfg
      preload3 = [Unit] -> [Unit]
forall a. Ord a => [a] -> [a]
ordNub ([Unit] -> [Unit]) -> [Unit] -> [Unit]
forall a b. (a -> b) -> a -> b
$ ([Unit]
basicLinkedUnits [Unit] -> [Unit] -> [Unit]
forall a. [a] -> [a] -> [a]
++ [Unit]
preload1)

  -- Close the preload packages with their dependencies
  dep_preload <- mayThrowUnitErr
                    $ closeUnitDeps pkg_db
                    $ zip (map toUnitId preload3) (repeat Nothing)

  let mod_map1 = Logger
-> UnitConfig
-> UnitInfoMap
-> PreloadUnitClosure
-> VisibilityMap
-> ModuleNameProvidersMap
mkModuleNameProvidersMap Logger
logger UnitConfig
cfg UnitInfoMap
pkg_db PreloadUnitClosure
forall a. UniqSet a
emptyUniqSet VisibilityMap
vis_map
      mod_map2 = UnusableUnits -> ModuleNameProvidersMap
mkUnusableModuleNameProvidersMap UnusableUnits
unusable
      mod_map = ModuleNameProvidersMap
mod_map2 ModuleNameProvidersMap
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
forall k a. UniqMap k a -> UniqMap k a -> UniqMap k a
`plusUniqMap` ModuleNameProvidersMap
mod_map1

  -- Force the result to avoid leaking input parameters
  let !state = UnitState
         { preloadUnits :: [UnitId]
preloadUnits                 = [UnitId]
dep_preload
         , explicitUnits :: [(Unit, Maybe PackageArg)]
explicitUnits                = [(Unit, Maybe PackageArg)]
explicit_pkgs
         , homeUnitDepends :: [UnitId]
homeUnitDepends              = Set UnitId -> [UnitId]
forall a. Set a -> [a]
Set.toList Set UnitId
home_unit_deps
         , unitInfoMap :: UnitInfoMap
unitInfoMap                  = UnitInfoMap
pkg_db
         , preloadClosure :: PreloadUnitClosure
preloadClosure               = PreloadUnitClosure
forall a. UniqSet a
emptyUniqSet
         , moduleNameProvidersMap :: ModuleNameProvidersMap
moduleNameProvidersMap       = ModuleNameProvidersMap
mod_map
         , pluginModuleNameProvidersMap :: ModuleNameProvidersMap
pluginModuleNameProvidersMap = Logger
-> UnitConfig
-> UnitInfoMap
-> PreloadUnitClosure
-> VisibilityMap
-> ModuleNameProvidersMap
mkModuleNameProvidersMap Logger
logger UnitConfig
cfg UnitInfoMap
pkg_db PreloadUnitClosure
forall a. UniqSet a
emptyUniqSet VisibilityMap
plugin_vis_map
         , packageNameMap :: UniqFM PackageName UnitId
packageNameMap               = UniqFM PackageName UnitId
pkgname_map
         , wireMap :: UniqMap UnitId UnitId
wireMap                      = UniqMap UnitId UnitId
wired_map
         , unwireMap :: UniqMap UnitId UnitId
unwireMap                    = [(UnitId, UnitId)] -> UniqMap UnitId UnitId
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap [ (UnitId
v,UnitId
k) | (UnitId
k,UnitId
v) <- UniqMap UnitId UnitId -> [(UnitId, UnitId)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap UnitId UnitId
wired_map ]
         , requirementContext :: UniqMap ModuleName [InstantiatedModule]
requirementContext           = UniqMap ModuleName [InstantiatedModule]
req_ctx
         , allowVirtualUnits :: Bool
allowVirtualUnits            = UnitConfig -> Bool
unitConfigAllowVirtual UnitConfig
cfg
         }
  return (state, raw_dbs)

selectHptFlag :: Set.Set UnitId -> PackageFlag -> Bool
selectHptFlag :: Set UnitId -> PackageFlag -> Bool
selectHptFlag Set UnitId
home_units (ExposePackage String
_ (UnitIdArg Unit
uid) ModRenaming
_) | Unit -> UnitId
toUnitId Unit
uid UnitId -> Set UnitId -> Bool
forall a. Ord a => a -> Set a -> Bool
`Set.member` Set UnitId
home_units = Bool
True
selectHptFlag Set UnitId
_ PackageFlag
_ = Bool
False

selectHomeUnits :: Set.Set UnitId -> [PackageFlag] -> Set.Set UnitId
selectHomeUnits :: Set UnitId -> [PackageFlag] -> Set UnitId
selectHomeUnits Set UnitId
home_units [PackageFlag]
flags = (Set UnitId -> PackageFlag -> Set UnitId)
-> Set UnitId -> [PackageFlag] -> Set UnitId
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' Set UnitId -> PackageFlag -> Set UnitId
go Set UnitId
forall a. Set a
Set.empty [PackageFlag]
flags
  where
    go :: Set.Set UnitId -> PackageFlag -> Set.Set UnitId
    go :: Set UnitId -> PackageFlag -> Set UnitId
go Set UnitId
cur (ExposePackage String
_ (UnitIdArg Unit
uid) ModRenaming
_) | Unit -> UnitId
toUnitId Unit
uid UnitId -> Set UnitId -> Bool
forall a. Ord a => a -> Set a -> Bool
`Set.member` Set UnitId
home_units = UnitId -> Set UnitId -> Set UnitId
forall a. Ord a => a -> Set a -> Set a
Set.insert (Unit -> UnitId
toUnitId Unit
uid) Set UnitId
cur
    -- MP: This does not yet support thinning/renaming
    go Set UnitId
cur PackageFlag
_ = Set UnitId
cur


-- | Given a wired-in 'Unit', "unwire" it into the 'Unit'
-- that it was recorded as in the package database.
unwireUnit :: UnitState -> Unit -> Unit
unwireUnit :: UnitState -> Unit -> Unit
unwireUnit UnitState
state uid :: Unit
uid@(RealUnit (Definite UnitId
def_uid)) =
    Unit -> (UnitId -> Unit) -> Maybe UnitId -> Unit
forall b a. b -> (a -> b) -> Maybe a -> b
maybe Unit
uid (Definite UnitId -> Unit
forall uid. Definite uid -> GenUnit uid
RealUnit (Definite UnitId -> Unit)
-> (UnitId -> Definite UnitId) -> UnitId -> Unit
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitId -> Definite UnitId
forall unit. unit -> Definite unit
Definite) (UniqMap UnitId UnitId -> UnitId -> Maybe UnitId
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap (UnitState -> UniqMap UnitId UnitId
unwireMap UnitState
state) UnitId
def_uid)
unwireUnit UnitState
_ Unit
uid = Unit
uid

-- -----------------------------------------------------------------------------
-- | Makes the mapping from ModuleName to package info

-- Slight irritation: we proceed by leafing through everything
-- in the installed package database, which makes handling indefinite
-- packages a bit bothersome.

mkModuleNameProvidersMap
  :: Logger
  -> UnitConfig
  -> UnitInfoMap
  -> PreloadUnitClosure
  -> VisibilityMap
  -> ModuleNameProvidersMap
mkModuleNameProvidersMap :: Logger
-> UnitConfig
-> UnitInfoMap
-> PreloadUnitClosure
-> VisibilityMap
-> ModuleNameProvidersMap
mkModuleNameProvidersMap Logger
logger UnitConfig
cfg UnitInfoMap
pkg_map PreloadUnitClosure
closure VisibilityMap
vis_map =
    -- What should we fold on?  Both situations are awkward:
    --
    --    * Folding on the visibility map means that we won't create
    --      entries for packages that aren't mentioned in vis_map
    --      (e.g., hidden packages, causing #14717)
    --
    --    * Folding on pkg_map is awkward because if we have an
    --      Backpack instantiation, we need to possibly add a
    --      package from pkg_map multiple times to the actual
    --      ModuleNameProvidersMap.  Also, we don't really want
    --      definite package instantiations to show up in the
    --      list of possibilities.
    --
    -- So what will we do instead?  We'll extend vis_map with
    -- entries for every definite (for non-Backpack) and
    -- indefinite (for Backpack) package, so that we get the
    -- hidden entries we need.
    ((Unit, UnitVisibility)
 -> ModuleNameProvidersMap -> ModuleNameProvidersMap)
-> ModuleNameProvidersMap
-> VisibilityMap
-> ModuleNameProvidersMap
forall k a b. ((k, a) -> b -> b) -> b -> UniqMap k a -> b
nonDetFoldUniqMap (Unit, UnitVisibility)
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
extend_modmap ModuleNameProvidersMap
forall k a. UniqMap k a
emptyMap VisibilityMap
vis_map_extended
 where
  vis_map_extended :: VisibilityMap
vis_map_extended = {- preferred -} VisibilityMap
default_vis VisibilityMap -> VisibilityMap -> VisibilityMap
forall k a. UniqMap k a -> UniqMap k a -> UniqMap k a
`plusUniqMap` VisibilityMap
vis_map

  default_vis :: VisibilityMap
default_vis = [(Unit, UnitVisibility)] -> VisibilityMap
forall k a. Uniquable k => [(k, a)] -> UniqMap k a
listToUniqMap
                  [ (UnitInfo -> Unit
mkUnit UnitInfo
pkg, UnitVisibility
forall a. Monoid a => a
mempty)
                  | (UnitId
_, UnitInfo
pkg) <- UnitInfoMap -> [(UnitId, UnitInfo)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UnitInfoMap
pkg_map
                  -- Exclude specific instantiations of an indefinite
                  -- package
                  , UnitInfo -> Bool
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
unitIsIndefinite UnitInfo
pkg Bool -> Bool -> Bool
|| [(ModuleName, Module)] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null (UnitInfo -> [(ModuleName, Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, mod)]
unitInstantiations UnitInfo
pkg)
                  ]

  emptyMap :: UniqMap k a
emptyMap = UniqMap k a
forall k a. UniqMap k a
emptyUniqMap
  setOrigins :: f a -> b -> f b
setOrigins f a
m b
os = (a -> b) -> f a -> f b
forall a b. (a -> b) -> f a -> f b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (b -> a -> b
forall a b. a -> b -> a
const b
os) f a
m
  extend_modmap :: (Unit, UnitVisibility)
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
extend_modmap (Unit
uid, UnitVisibility { uv_expose_all :: UnitVisibility -> Bool
uv_expose_all = Bool
b, uv_renamings :: UnitVisibility -> [(ModuleName, ModuleName)]
uv_renamings = [(ModuleName, ModuleName)]
rns }) ModuleNameProvidersMap
modmap
    = ModuleNameProvidersMap
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> ModuleNameProvidersMap
forall a k1 k2.
(Monoid a, Ord k1, Ord k2, Uniquable k1, Uniquable k2) =>
UniqMap k1 (UniqMap k2 a)
-> [(k1, UniqMap k2 a)] -> UniqMap k1 (UniqMap k2 a)
addListTo ModuleNameProvidersMap
modmap [(ModuleName, UniqMap Module ModuleOrigin)]
theBindings
   where
    pkg :: UnitInfo
pkg = Unit -> UnitInfo
unit_lookup Unit
uid

    theBindings :: [(ModuleName, UniqMap Module ModuleOrigin)]
    theBindings :: [(ModuleName, UniqMap Module ModuleOrigin)]
theBindings = Bool
-> [(ModuleName, ModuleName)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
newBindings Bool
b [(ModuleName, ModuleName)]
rns

    newBindings :: Bool
                -> [(ModuleName, ModuleName)]
                -> [(ModuleName, UniqMap Module ModuleOrigin)]
    newBindings :: Bool
-> [(ModuleName, ModuleName)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
newBindings Bool
e [(ModuleName, ModuleName)]
rns  = Bool -> [(ModuleName, UniqMap Module ModuleOrigin)]
es Bool
e [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a. [a] -> [a] -> [a]
++ [(ModuleName, UniqMap Module ModuleOrigin)]
hiddens [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a. [a] -> [a] -> [a]
++ ((ModuleName, ModuleName)
 -> (ModuleName, UniqMap Module ModuleOrigin))
-> [(ModuleName, ModuleName)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName, ModuleName)
-> (ModuleName, UniqMap Module ModuleOrigin)
rnBinding [(ModuleName, ModuleName)]
rns

    rnBinding :: (ModuleName, ModuleName)
              -> (ModuleName, UniqMap Module ModuleOrigin)
    rnBinding :: (ModuleName, ModuleName)
-> (ModuleName, UniqMap Module ModuleOrigin)
rnBinding (ModuleName
orig, ModuleName
new) = (ModuleName
new, UniqMap Module ModuleOrigin
-> ModuleOrigin -> UniqMap Module ModuleOrigin
forall {f :: * -> *} {a} {b}. Functor f => f a -> b -> f b
setOrigins UniqMap Module ModuleOrigin
origEntry ModuleOrigin
fromFlag)
     where origEntry :: UniqMap Module ModuleOrigin
origEntry = case UniqFM ModuleName (UniqMap Module ModuleOrigin)
-> ModuleName -> Maybe (UniqMap Module ModuleOrigin)
forall key elt. Uniquable key => UniqFM key elt -> key -> Maybe elt
lookupUFM UniqFM ModuleName (UniqMap Module ModuleOrigin)
esmap ModuleName
orig of
            Just UniqMap Module ModuleOrigin
r -> UniqMap Module ModuleOrigin
r
            Maybe (UniqMap Module ModuleOrigin)
Nothing -> GhcException -> UniqMap Module ModuleOrigin
forall a. GhcException -> a
throwGhcException (String -> GhcException
CmdLineError (SDocContext -> SDoc -> String
renderWithContext
                        (LogFlags -> SDocContext
log_default_user_context (Logger -> LogFlags
logFlags Logger
logger))
                        (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"package flag: could not find module name" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
                            ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
orig SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"in package" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr Unit
pk)))

    es :: Bool -> [(ModuleName, UniqMap Module ModuleOrigin)]
    es :: Bool -> [(ModuleName, UniqMap Module ModuleOrigin)]
es Bool
e = do
     (m, exposedReexport) <- [(ModuleName, Maybe Module)]
exposed_mods
     let (pk', m', origin') =
          case exposedReexport of
           Maybe Module
Nothing -> (Unit
pk, ModuleName
m, Bool -> ModuleOrigin
fromExposedModules Bool
e)
           Just (Module Unit
pk' ModuleName
m') ->
              (Unit
pk', ModuleName
m', Bool -> UnitInfo -> ModuleOrigin
fromReexportedModules Bool
e UnitInfo
pkg)
     return (m, mkModMap pk' m' origin')

    esmap :: UniqFM ModuleName (UniqMap Module ModuleOrigin)
    esmap :: UniqFM ModuleName (UniqMap Module ModuleOrigin)
esmap = [(ModuleName, UniqMap Module ModuleOrigin)]
-> UniqFM ModuleName (UniqMap Module ModuleOrigin)
forall key elt. Uniquable key => [(key, elt)] -> UniqFM key elt
listToUFM (Bool -> [(ModuleName, UniqMap Module ModuleOrigin)]
es Bool
False) -- parameter here doesn't matter, orig will
                                 -- be overwritten

    hiddens :: [(ModuleName, UniqMap Module ModuleOrigin)]
hiddens = [(ModuleName
m, Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap Unit
pk ModuleName
m ModuleOrigin
ModHidden) | ModuleName
m <- [ModuleName]
hidden_mods]

    pk :: Unit
pk = UnitInfo -> Unit
mkUnit UnitInfo
pkg
    unit_lookup :: Unit -> UnitInfo
unit_lookup Unit
uid = Bool -> UnitInfoMap -> PreloadUnitClosure -> Unit -> Maybe UnitInfo
lookupUnit' (UnitConfig -> Bool
unitConfigAllowVirtual UnitConfig
cfg) UnitInfoMap
pkg_map PreloadUnitClosure
closure Unit
uid
                        Maybe UnitInfo -> UnitInfo -> UnitInfo
forall a. Maybe a -> a -> a
`orElse` String -> SDoc -> UnitInfo
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"unit_lookup" (Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr Unit
uid)

    exposed_mods :: [(ModuleName, Maybe Module)]
exposed_mods = UnitInfo -> [(ModuleName, Maybe Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, Maybe mod)]
unitExposedModules UnitInfo
pkg
    hidden_mods :: [ModuleName]
hidden_mods  = UnitInfo -> [ModuleName]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [modulename]
unitHiddenModules UnitInfo
pkg

-- | Make a 'ModuleNameProvidersMap' covering a set of unusable packages.
mkUnusableModuleNameProvidersMap :: UnusableUnits -> ModuleNameProvidersMap
mkUnusableModuleNameProvidersMap :: UnusableUnits -> ModuleNameProvidersMap
mkUnusableModuleNameProvidersMap UnusableUnits
unusables =
    ((UnitId, (UnitInfo, UnusableUnitReason))
 -> ModuleNameProvidersMap -> ModuleNameProvidersMap)
-> ModuleNameProvidersMap
-> UnusableUnits
-> ModuleNameProvidersMap
forall k a b. ((k, a) -> b -> b) -> b -> UniqMap k a -> b
nonDetFoldUniqMap (UnitId, (UnitInfo, UnusableUnitReason))
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
forall {a}.
(a, (UnitInfo, UnusableUnitReason))
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
extend_modmap ModuleNameProvidersMap
forall k a. UniqMap k a
emptyUniqMap UnusableUnits
unusables
 where
    extend_modmap :: (a, (UnitInfo, UnusableUnitReason))
-> ModuleNameProvidersMap -> ModuleNameProvidersMap
extend_modmap (a
_uid, (UnitInfo
unit_info, UnusableUnitReason
reason)) ModuleNameProvidersMap
modmap = ModuleNameProvidersMap
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> ModuleNameProvidersMap
forall a k1 k2.
(Monoid a, Ord k1, Ord k2, Uniquable k1, Uniquable k2) =>
UniqMap k1 (UniqMap k2 a)
-> [(k1, UniqMap k2 a)] -> UniqMap k1 (UniqMap k2 a)
addListTo ModuleNameProvidersMap
modmap [(ModuleName, UniqMap Module ModuleOrigin)]
bindings
      where bindings :: [(ModuleName, UniqMap Module ModuleOrigin)]
            bindings :: [(ModuleName, UniqMap Module ModuleOrigin)]
bindings = [(ModuleName, UniqMap Module ModuleOrigin)]
exposed [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a. [a] -> [a] -> [a]
++ [(ModuleName, UniqMap Module ModuleOrigin)]
hidden

            origin_reexport :: ModuleOrigin
origin_reexport =  UnusableUnit -> ModuleOrigin
ModUnusable (Unit -> UnusableUnitReason -> Bool -> UnusableUnit
UnusableUnit Unit
unit UnusableUnitReason
reason Bool
True)
            origin_normal :: ModuleOrigin
origin_normal   =  UnusableUnit -> ModuleOrigin
ModUnusable (Unit -> UnusableUnitReason -> Bool -> UnusableUnit
UnusableUnit Unit
unit UnusableUnitReason
reason Bool
False)
            unit :: Unit
unit = UnitInfo -> Unit
mkUnit UnitInfo
unit_info

            exposed :: [(ModuleName, UniqMap Module ModuleOrigin)]
exposed = ((ModuleName, Maybe Module)
 -> (ModuleName, UniqMap Module ModuleOrigin))
-> [(ModuleName, Maybe Module)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName, Maybe Module)
-> (ModuleName, UniqMap Module ModuleOrigin)
get_exposed [(ModuleName, Maybe Module)]
exposed_mods
            hidden :: [(ModuleName, UniqMap Module ModuleOrigin)]
hidden = [(ModuleName
m, Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap Unit
unit ModuleName
m ModuleOrigin
origin_normal) | ModuleName
m <- [ModuleName]
hidden_mods]

            -- with re-exports, c:Foo can be reexported from two (or more)
            -- unusable packages:
            --  Foo -> a:Foo (unusable reason A) -> c:Foo
            --      -> b:Foo (unusable reason B) -> c:Foo
            --
            -- We must be careful to not record the following (#21097):
            --  Foo -> c:Foo (unusable reason A)
            --      -> c:Foo (unusable reason B)
            -- But:
            --  Foo -> a:Foo (unusable reason A)
            --      -> b:Foo (unusable reason B)
            --
            get_exposed :: (ModuleName, Maybe Module)
-> (ModuleName, UniqMap Module ModuleOrigin)
get_exposed (ModuleName
mod, Just Module
_) = (ModuleName
mod, Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap Unit
unit ModuleName
mod ModuleOrigin
origin_reexport)
            get_exposed (ModuleName
mod, Maybe Module
_) = (ModuleName
mod, Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap Unit
unit ModuleName
mod ModuleOrigin
origin_normal)
              -- in the reexport case, we create a virtual module that doesn't
              -- exist but we don't care as it's only used as a key in the map.

            exposed_mods :: [(ModuleName, Maybe Module)]
exposed_mods = UnitInfo -> [(ModuleName, Maybe Module)]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [(modulename, Maybe mod)]
unitExposedModules UnitInfo
unit_info
            hidden_mods :: [ModuleName]
hidden_mods  = UnitInfo -> [ModuleName]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> [modulename]
unitHiddenModules  UnitInfo
unit_info

-- | Add a list of key/value pairs to a nested map.
--
-- The outer map is processed with 'Data.Map.Strict' to prevent memory leaks
-- when reloading modules in GHCi (see #4029). This ensures that each
-- value is forced before installing into the map.
addListTo :: (Monoid a, Ord k1, Ord k2, Uniquable k1, Uniquable k2)
          => UniqMap k1 (UniqMap k2 a)
          -> [(k1, UniqMap k2 a)]
          -> UniqMap k1 (UniqMap k2 a)
addListTo :: forall a k1 k2.
(Monoid a, Ord k1, Ord k2, Uniquable k1, Uniquable k2) =>
UniqMap k1 (UniqMap k2 a)
-> [(k1, UniqMap k2 a)] -> UniqMap k1 (UniqMap k2 a)
addListTo = (UniqMap k1 (UniqMap k2 a)
 -> (k1, UniqMap k2 a) -> UniqMap k1 (UniqMap k2 a))
-> UniqMap k1 (UniqMap k2 a)
-> [(k1, UniqMap k2 a)]
-> UniqMap k1 (UniqMap k2 a)
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' UniqMap k1 (UniqMap k2 a)
-> (k1, UniqMap k2 a) -> UniqMap k1 (UniqMap k2 a)
forall {k} {a} {k}.
(Uniquable k, Monoid a) =>
UniqMap k (UniqMap k a)
-> (k, UniqMap k a) -> UniqMap k (UniqMap k a)
merge
  where merge :: UniqMap k (UniqMap k a)
-> (k, UniqMap k a) -> UniqMap k (UniqMap k a)
merge UniqMap k (UniqMap k a)
m (k
k, UniqMap k a
v) = (UniqMap k a -> UniqMap k a -> UniqMap k a)
-> UniqMap k (UniqMap k a)
-> k
-> UniqMap k a
-> UniqMap k (UniqMap k a)
forall k a.
Uniquable k =>
(a -> a -> a) -> UniqMap k a -> k -> a -> UniqMap k a
addToUniqMap_C ((a -> a -> a) -> UniqMap k a -> UniqMap k a -> UniqMap k a
forall a k.
(a -> a -> a) -> UniqMap k a -> UniqMap k a -> UniqMap k a
plusUniqMap_C a -> a -> a
forall a. Monoid a => a -> a -> a
mappend) UniqMap k (UniqMap k a)
m k
k UniqMap k a
v

-- | Create a singleton module mapping
mkModMap :: Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap :: Unit -> ModuleName -> ModuleOrigin -> UniqMap Module ModuleOrigin
mkModMap Unit
pkg ModuleName
mod = Module -> ModuleOrigin -> UniqMap Module ModuleOrigin
forall k a. Uniquable k => k -> a -> UniqMap k a
unitUniqMap (Unit -> ModuleName -> Module
forall unit. unit -> ModuleName -> GenModule unit
mkModule Unit
pkg ModuleName
mod)


-- -----------------------------------------------------------------------------
-- Package Utils

-- | Takes a 'ModuleName', and if the module is in any package returns
-- list of modules which take that name.
lookupModuleInAllUnits :: UnitState
                          -> ModuleName
                          -> [(Module, UnitInfo)]
lookupModuleInAllUnits :: UnitState -> ModuleName -> [(Module, UnitInfo)]
lookupModuleInAllUnits UnitState
pkgs ModuleName
m
  = case UnitState -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions UnitState
pkgs ModuleName
m PkgQual
NoPkgQual of
      LookupFound Module
a (UnitInfo, ModuleOrigin)
b -> [(Module
a,(UnitInfo, ModuleOrigin) -> UnitInfo
forall a b. (a, b) -> a
fst (UnitInfo, ModuleOrigin)
b)]
      LookupMultiple [(Module, ModuleOrigin)]
rs -> ((Module, ModuleOrigin) -> (Module, UnitInfo))
-> [(Module, ModuleOrigin)] -> [(Module, UnitInfo)]
forall a b. (a -> b) -> [a] -> [b]
map (Module, ModuleOrigin) -> (Module, UnitInfo)
f [(Module, ModuleOrigin)]
rs
        where f :: (Module, ModuleOrigin) -> (Module, UnitInfo)
f (Module
m,ModuleOrigin
_) = (Module
m, String -> Maybe UnitInfo -> UnitInfo
forall a. HasDebugCallStack => String -> Maybe a -> a
expectJust String
"lookupModule" (UnitState -> Unit -> Maybe UnitInfo
lookupUnit UnitState
pkgs
                                                         (Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit Module
m)))
      LookupResult
_ -> []

-- | The result of performing a lookup
data LookupResult =
    -- | Found the module uniquely, nothing else to do
    LookupFound Module (UnitInfo, ModuleOrigin)
    -- | Multiple modules with the same name in scope
  | LookupMultiple [(Module, ModuleOrigin)]
    -- | No modules found, but there were some hidden ones with
    -- an exact name match.  First is due to package hidden, second
    -- is due to module being hidden
  | LookupHidden [(Module, ModuleOrigin)] [(Module, ModuleOrigin)]
    -- | No modules found, but there were some unusable ones with
    -- an exact name match
  | LookupUnusable [(Module, ModuleOrigin)]
    -- | Nothing found, here are some suggested different names
  | LookupNotFound [ModuleSuggestion] -- suggestions

data ModuleSuggestion = SuggestVisible ModuleName Module ModuleOrigin
                      | SuggestHidden ModuleName Module ModuleOrigin

lookupModuleWithSuggestions :: UnitState
                            -> ModuleName
                            -> PkgQual
                            -> LookupResult
lookupModuleWithSuggestions :: UnitState -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions UnitState
pkgs
  = UnitState
-> ModuleNameProvidersMap -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions' UnitState
pkgs (UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap UnitState
pkgs)

-- | The package which the module **appears** to come from, this could be
-- the one which reexports the module from it's original package. This function
-- is currently only used for -Wunused-packages
lookupModulePackage :: UnitState -> ModuleName -> PkgQual -> Maybe [UnitInfo]
lookupModulePackage :: UnitState -> ModuleName -> PkgQual -> Maybe [UnitInfo]
lookupModulePackage UnitState
pkgs ModuleName
mn PkgQual
mfs =
    case UnitState
-> ModuleNameProvidersMap -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions' UnitState
pkgs (UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap UnitState
pkgs) ModuleName
mn PkgQual
mfs of
      LookupFound Module
_ (UnitInfo
orig_unit, ModuleOrigin
origin) ->
        case ModuleOrigin
origin of
          ModOrigin {Maybe Bool
fromOrigUnit :: ModuleOrigin -> Maybe Bool
fromOrigUnit :: Maybe Bool
fromOrigUnit, [UnitInfo]
fromExposedReexport :: ModuleOrigin -> [UnitInfo]
fromExposedReexport :: [UnitInfo]
fromExposedReexport} ->
            case Maybe Bool
fromOrigUnit of
              -- Just True means, the import is available from its original location
              Just Bool
True ->
                [UnitInfo] -> Maybe [UnitInfo]
forall a. a -> Maybe a
forall (f :: * -> *) a. Applicative f => a -> f a
pure [UnitInfo
orig_unit]
              -- Otherwise, it must be available from a reexport
              Maybe Bool
_ -> [UnitInfo] -> Maybe [UnitInfo]
forall a. a -> Maybe a
forall (f :: * -> *) a. Applicative f => a -> f a
pure [UnitInfo]
fromExposedReexport

          ModuleOrigin
_ -> Maybe [UnitInfo]
forall a. Maybe a
Nothing

      LookupResult
_ -> Maybe [UnitInfo]
forall a. Maybe a
Nothing

lookupPluginModuleWithSuggestions :: UnitState
                                  -> ModuleName
                                  -> PkgQual
                                  -> LookupResult
lookupPluginModuleWithSuggestions :: UnitState -> ModuleName -> PkgQual -> LookupResult
lookupPluginModuleWithSuggestions UnitState
pkgs
  = UnitState
-> ModuleNameProvidersMap -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions' UnitState
pkgs (UnitState -> ModuleNameProvidersMap
pluginModuleNameProvidersMap UnitState
pkgs)

lookupModuleWithSuggestions' :: UnitState
                            -> ModuleNameProvidersMap
                            -> ModuleName
                            -> PkgQual
                            -> LookupResult
lookupModuleWithSuggestions' :: UnitState
-> ModuleNameProvidersMap -> ModuleName -> PkgQual -> LookupResult
lookupModuleWithSuggestions' UnitState
pkgs ModuleNameProvidersMap
mod_map ModuleName
m PkgQual
mb_pn
  = case ModuleNameProvidersMap
-> ModuleName -> Maybe (UniqMap Module ModuleOrigin)
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap ModuleNameProvidersMap
mod_map ModuleName
m of
        Maybe (UniqMap Module ModuleOrigin)
Nothing -> [ModuleSuggestion] -> LookupResult
LookupNotFound [ModuleSuggestion]
suggestions
        Just UniqMap Module ModuleOrigin
xs ->
          case (([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
  [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
 -> (Module, ModuleOrigin)
 -> ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
     [(Module, ModuleOrigin)], [(Module, ModuleOrigin)]))
-> ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
    [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
-> [(Module, ModuleOrigin)]
-> ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
    [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
forall b a. (b -> a -> b) -> b -> [a] -> b
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl' ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
 [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
-> (Module, ModuleOrigin)
-> ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
    [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
classify ([],[],[], []) (((Module, ModuleOrigin) -> Module)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall b a. Ord b => (a -> b) -> [a] -> [a]
sortOn (Module, ModuleOrigin) -> Module
forall a b. (a, b) -> a
fst ([(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)])
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a b. (a -> b) -> a -> b
$ UniqMap Module ModuleOrigin -> [(Module, ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap Module ModuleOrigin
xs) of
            ([], [], [], []) -> [ModuleSuggestion] -> LookupResult
LookupNotFound [ModuleSuggestion]
suggestions
            ([(Module, ModuleOrigin)]
_, [(Module, ModuleOrigin)]
_, [(Module, ModuleOrigin)]
_, [(Module
m, ModuleOrigin
o)])             -> Module -> (UnitInfo, ModuleOrigin) -> LookupResult
LookupFound Module
m (Module -> UnitInfo
mod_unit Module
m, ModuleOrigin
o)
            ([(Module, ModuleOrigin)]
_, [(Module, ModuleOrigin)]
_, [(Module, ModuleOrigin)]
_, exposed :: [(Module, ModuleOrigin)]
exposed@((Module, ModuleOrigin)
_:[(Module, ModuleOrigin)]
_))        -> [(Module, ModuleOrigin)] -> LookupResult
LookupMultiple [(Module, ModuleOrigin)]
exposed
            ([], [], unusable :: [(Module, ModuleOrigin)]
unusable@((Module, ModuleOrigin)
_:[(Module, ModuleOrigin)]
_), [])    -> [(Module, ModuleOrigin)] -> LookupResult
LookupUnusable [(Module, ModuleOrigin)]
unusable
            ([(Module, ModuleOrigin)]
hidden_pkg, [(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
_, []) ->
              [(Module, ModuleOrigin)]
-> [(Module, ModuleOrigin)] -> LookupResult
LookupHidden [(Module, ModuleOrigin)]
hidden_pkg [(Module, ModuleOrigin)]
hidden_mod
  where
    classify :: ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
 [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
-> (Module, ModuleOrigin)
-> ([(Module, ModuleOrigin)], [(Module, ModuleOrigin)],
    [(Module, ModuleOrigin)], [(Module, ModuleOrigin)])
classify ([(Module, ModuleOrigin)]
hidden_pkg, [(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
unusable, [(Module, ModuleOrigin)]
exposed) (Module
m, ModuleOrigin
origin0) =
      let origin :: ModuleOrigin
origin = PkgQual -> UnitInfo -> ModuleOrigin -> ModuleOrigin
filterOrigin PkgQual
mb_pn (Module -> UnitInfo
mod_unit Module
m) ModuleOrigin
origin0
          x :: (Module, ModuleOrigin)
x = (Module
m, ModuleOrigin
origin)
      in case ModuleOrigin
origin of
          ModuleOrigin
ModHidden
            -> ([(Module, ModuleOrigin)]
hidden_pkg, (Module, ModuleOrigin)
x(Module, ModuleOrigin)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a. a -> [a] -> [a]
:[(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
unusable, [(Module, ModuleOrigin)]
exposed)
          ModUnusable UnusableUnit
_
            -> ([(Module, ModuleOrigin)]
hidden_pkg, [(Module, ModuleOrigin)]
hidden_mod, (Module, ModuleOrigin)
x(Module, ModuleOrigin)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a. a -> [a] -> [a]
:[(Module, ModuleOrigin)]
unusable, [(Module, ModuleOrigin)]
exposed)
          ModuleOrigin
_ | ModuleOrigin -> Bool
originEmpty ModuleOrigin
origin
            -> ([(Module, ModuleOrigin)]
hidden_pkg,   [(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
unusable, [(Module, ModuleOrigin)]
exposed)
            | ModuleOrigin -> Bool
originVisible ModuleOrigin
origin
            -> ([(Module, ModuleOrigin)]
hidden_pkg, [(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
unusable, (Module, ModuleOrigin)
x(Module, ModuleOrigin)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a. a -> [a] -> [a]
:[(Module, ModuleOrigin)]
exposed)
            | Bool
otherwise
            -> ((Module, ModuleOrigin)
x(Module, ModuleOrigin)
-> [(Module, ModuleOrigin)] -> [(Module, ModuleOrigin)]
forall a. a -> [a] -> [a]
:[(Module, ModuleOrigin)]
hidden_pkg, [(Module, ModuleOrigin)]
hidden_mod, [(Module, ModuleOrigin)]
unusable, [(Module, ModuleOrigin)]
exposed)

    unit_lookup :: Unit -> UnitInfo
unit_lookup Unit
p = UnitState -> Unit -> Maybe UnitInfo
lookupUnit UnitState
pkgs Unit
p Maybe UnitInfo -> UnitInfo -> UnitInfo
forall a. Maybe a -> a -> a
`orElse` String -> SDoc -> UnitInfo
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"lookupModuleWithSuggestions" (Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr Unit
p SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
m)
    mod_unit :: Module -> UnitInfo
mod_unit = Unit -> UnitInfo
unit_lookup (Unit -> UnitInfo) -> (Module -> Unit) -> Module -> UnitInfo
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit

    -- Filters out origins which are not associated with the given package
    -- qualifier.  No-op if there is no package qualifier.  Test if this
    -- excluded all origins with 'originEmpty'.
    filterOrigin :: PkgQual
                 -> UnitInfo
                 -> ModuleOrigin
                 -> ModuleOrigin
    filterOrigin :: PkgQual -> UnitInfo -> ModuleOrigin -> ModuleOrigin
filterOrigin PkgQual
NoPkgQual UnitInfo
_ ModuleOrigin
o = ModuleOrigin
o
    filterOrigin (ThisPkg UnitId
_) UnitInfo
_ ModuleOrigin
o = ModuleOrigin
o
    filterOrigin (OtherPkg UnitId
u) UnitInfo
pkg ModuleOrigin
o =
      let match_pkg :: UnitInfo -> Bool
match_pkg UnitInfo
p = UnitId
u UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
== UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
p
      in case ModuleOrigin
o of
          ModuleOrigin
ModHidden
            | UnitInfo -> Bool
match_pkg UnitInfo
pkg -> ModuleOrigin
ModHidden
            | Bool
otherwise     -> ModuleOrigin
forall a. Monoid a => a
mempty
          ModUnusable UnusableUnit
_
            | UnitInfo -> Bool
match_pkg UnitInfo
pkg -> ModuleOrigin
o
            | Bool
otherwise     -> ModuleOrigin
forall a. Monoid a => a
mempty
          ModOrigin { fromOrigUnit :: ModuleOrigin -> Maybe Bool
fromOrigUnit = Maybe Bool
e, fromExposedReexport :: ModuleOrigin -> [UnitInfo]
fromExposedReexport = [UnitInfo]
res,
                      fromHiddenReexport :: ModuleOrigin -> [UnitInfo]
fromHiddenReexport = [UnitInfo]
rhs }
            -> ModOrigin
                { fromOrigUnit :: Maybe Bool
fromOrigUnit        = if UnitInfo -> Bool
match_pkg UnitInfo
pkg then Maybe Bool
e else Maybe Bool
forall a. Maybe a
Nothing
                , fromExposedReexport :: [UnitInfo]
fromExposedReexport = (UnitInfo -> Bool) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> Bool) -> [a] -> [a]
filter UnitInfo -> Bool
match_pkg [UnitInfo]
res
                , fromHiddenReexport :: [UnitInfo]
fromHiddenReexport  = (UnitInfo -> Bool) -> [UnitInfo] -> [UnitInfo]
forall a. (a -> Bool) -> [a] -> [a]
filter UnitInfo -> Bool
match_pkg [UnitInfo]
rhs
                , fromPackageFlag :: Bool
fromPackageFlag     = Bool
False -- always excluded
                }

    suggestions :: [ModuleSuggestion]
suggestions = String -> [(String, ModuleSuggestion)] -> [ModuleSuggestion]
forall a. String -> [(String, a)] -> [a]
fuzzyLookup (ModuleName -> String
moduleNameString ModuleName
m) [(String, ModuleSuggestion)]
all_mods

    all_mods :: [(String, ModuleSuggestion)]     -- All modules
    all_mods :: [(String, ModuleSuggestion)]
all_mods = ((String, ModuleSuggestion)
 -> (String, ModuleSuggestion) -> Ordering)
-> [(String, ModuleSuggestion)] -> [(String, ModuleSuggestion)]
forall a. (a -> a -> Ordering) -> [a] -> [a]
sortBy (((String, ModuleSuggestion) -> String)
-> (String, ModuleSuggestion)
-> (String, ModuleSuggestion)
-> Ordering
forall a t. Ord a => (t -> a) -> t -> t -> Ordering
comparing (String, ModuleSuggestion) -> String
forall a b. (a, b) -> a
fst) ([(String, ModuleSuggestion)] -> [(String, ModuleSuggestion)])
-> [(String, ModuleSuggestion)] -> [(String, ModuleSuggestion)]
forall a b. (a -> b) -> a -> b
$
        [ (ModuleName -> String
moduleNameString ModuleName
m, ModuleSuggestion
suggestion)
        | (ModuleName
m, UniqMap Module ModuleOrigin
e) <- ModuleNameProvidersMap
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList (UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap UnitState
pkgs)
        , ModuleSuggestion
suggestion <- ((Module, ModuleOrigin) -> ModuleSuggestion)
-> [(Module, ModuleOrigin)] -> [ModuleSuggestion]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName -> (Module, ModuleOrigin) -> ModuleSuggestion
getSuggestion ModuleName
m) (UniqMap Module ModuleOrigin -> [(Module, ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap Module ModuleOrigin
e)
        ]
    getSuggestion :: ModuleName -> (Module, ModuleOrigin) -> ModuleSuggestion
getSuggestion ModuleName
name (Module
mod, ModuleOrigin
origin) =
        (if ModuleOrigin -> Bool
originVisible ModuleOrigin
origin then ModuleName -> Module -> ModuleOrigin -> ModuleSuggestion
SuggestVisible else ModuleName -> Module -> ModuleOrigin -> ModuleSuggestion
SuggestHidden)
            ModuleName
name Module
mod ModuleOrigin
origin

listVisibleModuleNames :: UnitState -> [ModuleName]
listVisibleModuleNames :: UnitState -> [ModuleName]
listVisibleModuleNames UnitState
state =
    ((ModuleName, UniqMap Module ModuleOrigin) -> ModuleName)
-> [(ModuleName, UniqMap Module ModuleOrigin)] -> [ModuleName]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName, UniqMap Module ModuleOrigin) -> ModuleName
forall a b. (a, b) -> a
fst (((ModuleName, UniqMap Module ModuleOrigin) -> Bool)
-> [(ModuleName, UniqMap Module ModuleOrigin)]
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall a. (a -> Bool) -> [a] -> [a]
filter (ModuleName, UniqMap Module ModuleOrigin) -> Bool
forall {a} {k}. (a, UniqMap k ModuleOrigin) -> Bool
visible (ModuleNameProvidersMap
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList (UnitState -> ModuleNameProvidersMap
moduleNameProvidersMap UnitState
state)))
  where visible :: (a, UniqMap k ModuleOrigin) -> Bool
visible (a
_, UniqMap k ModuleOrigin
ms) = (ModuleOrigin -> Bool) -> UniqMap k ModuleOrigin -> Bool
forall a k. (a -> Bool) -> UniqMap k a -> Bool
anyUniqMap ModuleOrigin -> Bool
originVisible UniqMap k ModuleOrigin
ms

-- | Takes a list of UnitIds (and their "parent" dependency, used for error
-- messages), and returns the list with dependencies included, in reverse
-- dependency order (a units appears before those it depends on).
closeUnitDeps :: UnitInfoMap -> [(UnitId,Maybe UnitId)] -> MaybeErr UnitErr [UnitId]
closeUnitDeps :: UnitInfoMap
-> [(UnitId, Maybe UnitId)] -> MaybeErr UnitErr [UnitId]
closeUnitDeps UnitInfoMap
pkg_map [(UnitId, Maybe UnitId)]
ps = UnitInfoMap
-> [UnitId]
-> [(UnitId, Maybe UnitId)]
-> MaybeErr UnitErr [UnitId]
closeUnitDeps' UnitInfoMap
pkg_map [] [(UnitId, Maybe UnitId)]
ps

-- | Similar to closeUnitDeps but takes a list of already loaded units as an
-- additional argument.
closeUnitDeps' :: UnitInfoMap -> [UnitId] -> [(UnitId,Maybe UnitId)] -> MaybeErr UnitErr [UnitId]
closeUnitDeps' :: UnitInfoMap
-> [UnitId]
-> [(UnitId, Maybe UnitId)]
-> MaybeErr UnitErr [UnitId]
closeUnitDeps' UnitInfoMap
pkg_map [UnitId]
current_ids [(UnitId, Maybe UnitId)]
ps = ([UnitId] -> (UnitId, Maybe UnitId) -> MaybeErr UnitErr [UnitId])
-> [UnitId]
-> [(UnitId, Maybe UnitId)]
-> MaybeErr UnitErr [UnitId]
forall (t :: * -> *) (m :: * -> *) b a.
(Foldable t, Monad m) =>
(b -> a -> m b) -> b -> t a -> m b
foldM ((UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId])
-> (UnitId, Maybe UnitId) -> MaybeErr UnitErr [UnitId]
forall a b c. (a -> b -> c) -> (a, b) -> c
uncurry ((UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId])
 -> (UnitId, Maybe UnitId) -> MaybeErr UnitErr [UnitId])
-> ([UnitId]
    -> UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId])
-> [UnitId]
-> (UnitId, Maybe UnitId)
-> MaybeErr UnitErr [UnitId]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. UnitInfoMap
-> [UnitId] -> UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId]
add_unit UnitInfoMap
pkg_map) [UnitId]
current_ids [(UnitId, Maybe UnitId)]
ps

-- | Add a UnitId and those it depends on (recursively) to the given list of
-- UnitIds if they are not already in it. Return a list in reverse dependency
-- order (a unit appears before those it depends on).
--
-- The UnitId is looked up in the given UnitInfoMap (to find its dependencies).
-- It it's not found, the optional parent unit is used to return a more precise
-- error message ("dependency of <PARENT>").
add_unit :: UnitInfoMap
            -> [UnitId]
            -> UnitId
            -> Maybe UnitId
            -> MaybeErr UnitErr [UnitId]
add_unit :: UnitInfoMap
-> [UnitId] -> UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId]
add_unit UnitInfoMap
pkg_map [UnitId]
ps UnitId
p Maybe UnitId
mb_parent
  | UnitId
p UnitId -> [UnitId] -> Bool
forall a. Eq a => a -> [a] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem` [UnitId]
ps = [UnitId] -> MaybeErr UnitErr [UnitId]
forall a. a -> MaybeErr UnitErr a
forall (m :: * -> *) a. Monad m => a -> m a
return [UnitId]
ps     -- Check if we've already added this unit
  | Bool
otherwise   = case UnitInfoMap -> UnitId -> Maybe UnitInfo
lookupUnitId' UnitInfoMap
pkg_map UnitId
p of
      Maybe UnitInfo
Nothing   -> UnitErr -> MaybeErr UnitErr [UnitId]
forall err val. err -> MaybeErr err val
Failed (UnitId -> Maybe UnitId -> UnitErr
CloseUnitErr UnitId
p Maybe UnitId
mb_parent)
      Just UnitInfo
info -> do
         -- Add the unit's dependents also
         ps' <- ([UnitId] -> UnitId -> MaybeErr UnitErr [UnitId])
-> [UnitId] -> [UnitId] -> MaybeErr UnitErr [UnitId]
forall (t :: * -> *) (m :: * -> *) b a.
(Foldable t, Monad m) =>
(b -> a -> m b) -> b -> t a -> m b
foldM [UnitId] -> UnitId -> MaybeErr UnitErr [UnitId]
add_unit_key [UnitId]
ps (UnitInfo -> [UnitId]
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> [uid]
unitDepends UnitInfo
info)
         return (p : ps')
        where
          add_unit_key :: [UnitId] -> UnitId -> MaybeErr UnitErr [UnitId]
add_unit_key [UnitId]
xs UnitId
key
            = UnitInfoMap
-> [UnitId] -> UnitId -> Maybe UnitId -> MaybeErr UnitErr [UnitId]
add_unit UnitInfoMap
pkg_map [UnitId]
xs UnitId
key (UnitId -> Maybe UnitId
forall a. a -> Maybe a
Just UnitId
p)

data UnitErr
  = CloseUnitErr !UnitId !(Maybe UnitId)
  | PackageFlagErr !PackageFlag ![(UnitInfo,UnusableUnitReason)]
  | TrustFlagErr   !TrustFlag   ![(UnitInfo,UnusableUnitReason)]

mayThrowUnitErr :: MaybeErr UnitErr a -> IO a
mayThrowUnitErr :: forall a. MaybeErr UnitErr a -> IO a
mayThrowUnitErr = \case
    Failed UnitErr
e    -> GhcException -> IO a
forall a. GhcException -> IO a
throwGhcExceptionIO
                    (GhcException -> IO a) -> GhcException -> IO a
forall a b. (a -> b) -> a -> b
$ String -> GhcException
CmdLineError
                    (String -> GhcException) -> String -> GhcException
forall a b. (a -> b) -> a -> b
$ SDocContext -> SDoc -> String
renderWithContext SDocContext
defaultSDocContext
                    (SDoc -> String) -> SDoc -> String
forall a b. (a -> b) -> a -> b
$ PprStyle -> SDoc -> SDoc
withPprStyle PprStyle
defaultUserStyle
                    (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$ UnitErr -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitErr
e
    Succeeded a
a -> a -> IO a
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return a
a

instance Outputable UnitErr where
    ppr :: UnitErr -> SDoc
ppr = \case
        CloseUnitErr UnitId
p Maybe UnitId
mb_parent
            -> (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"unknown unit:" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
p)
               SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> case Maybe UnitId
mb_parent of
                     Maybe UnitId
Nothing     -> SDoc
forall doc. IsOutput doc => doc
Outputable.empty
                     Just UnitId
parent -> SDoc
forall doc. IsLine doc => doc
space SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"dependency of"
                                              SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext (UnitId -> FastString
unitIdFS UnitId
parent))
        PackageFlagErr PackageFlag
flag [(UnitInfo, UnusableUnitReason)]
reasons
            -> SDoc -> [(UnitInfo, UnusableUnitReason)] -> SDoc
forall {a} {srcpkgid} {srcpkgname} {modulename} {mod}.
Outputable a =>
SDoc
-> [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
     UnusableUnitReason)]
-> SDoc
flag_err (PackageFlag -> SDoc
pprFlag PackageFlag
flag) [(UnitInfo, UnusableUnitReason)]
reasons

        TrustFlagErr TrustFlag
flag [(UnitInfo, UnusableUnitReason)]
reasons
            -> SDoc -> [(UnitInfo, UnusableUnitReason)] -> SDoc
forall {a} {srcpkgid} {srcpkgname} {modulename} {mod}.
Outputable a =>
SDoc
-> [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
     UnusableUnitReason)]
-> SDoc
flag_err (TrustFlag -> SDoc
pprTrustFlag TrustFlag
flag) [(UnitInfo, UnusableUnitReason)]
reasons
      where
        flag_err :: SDoc
-> [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
     UnusableUnitReason)]
-> SDoc
flag_err SDoc
flag_doc [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
  UnusableUnitReason)]
reasons =
            String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"cannot satisfy "
            SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> SDoc
flag_doc
            SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> (if [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
  UnusableUnitReason)]
-> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
  UnusableUnitReason)]
reasons then SDoc
forall doc. IsOutput doc => doc
Outputable.empty else String -> SDoc
forall doc. IsLine doc => String -> doc
text String
": ")
            SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ Int -> SDoc -> SDoc
nest Int
4 ([SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat (((GenericUnitInfo srcpkgid srcpkgname a modulename mod,
  UnusableUnitReason)
 -> SDoc)
-> [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
     UnusableUnitReason)]
-> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (GenericUnitInfo srcpkgid srcpkgname a modulename mod,
 UnusableUnitReason)
-> SDoc
forall {a} {srcpkgid} {srcpkgname} {modulename} {mod}.
Outputable a =>
(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
 UnusableUnitReason)
-> SDoc
ppr_reason [(GenericUnitInfo srcpkgid srcpkgname a modulename mod,
  UnusableUnitReason)]
reasons) SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$
                      String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"(use -v for more information)")

        ppr_reason :: (GenericUnitInfo srcpkgid srcpkgname a modulename mod,
 UnusableUnitReason)
-> SDoc
ppr_reason (GenericUnitInfo srcpkgid srcpkgname a modulename mod
p, UnusableUnitReason
reason) =
            SDoc -> UnusableUnitReason -> SDoc
pprReason (a -> SDoc
forall a. Outputable a => a -> SDoc
ppr (GenericUnitInfo srcpkgid srcpkgname a modulename mod -> a
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname a modulename mod
p) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"is") UnusableUnitReason
reason

-- | Return this list of requirement interfaces that need to be merged
-- to form @mod_name@, or @[]@ if this is not a requirement.
requirementMerges :: UnitState -> ModuleName -> [InstantiatedModule]
requirementMerges :: UnitState -> ModuleName -> [InstantiatedModule]
requirementMerges UnitState
pkgstate ModuleName
mod_name =
  [InstantiatedModule]
-> Maybe [InstantiatedModule] -> [InstantiatedModule]
forall a. a -> Maybe a -> a
fromMaybe [] (UniqMap ModuleName [InstantiatedModule]
-> ModuleName -> Maybe [InstantiatedModule]
forall k a. Uniquable k => UniqMap k a -> k -> Maybe a
lookupUniqMap (UnitState -> UniqMap ModuleName [InstantiatedModule]
requirementContext UnitState
pkgstate) ModuleName
mod_name)

-- -----------------------------------------------------------------------------

-- | Pretty-print a UnitId for the user.
--
-- Cabal packages may contain several components (programs, libraries, etc.).
-- As far as GHC is concerned, installed package components ("units") are
-- identified by an opaque UnitId string provided by Cabal. As the string
-- contains a hash, we don't want to display it to users so GHC queries the
-- database to retrieve some infos about the original source package (name,
-- version, component name).
--
-- Instead we want to display: packagename-version[:componentname]
--
-- Component name is only displayed if it isn't the default library
--
-- To do this we need to query a unit database.
pprUnitIdForUser :: UnitState -> UnitId -> SDoc
pprUnitIdForUser :: UnitState -> UnitId -> SDoc
pprUnitIdForUser UnitState
state uid :: UnitId
uid@(UnitId FastString
fs) =
   case UnitState -> UnitId -> Maybe UnitPprInfo
lookupUnitPprInfo UnitState
state UnitId
uid of
      Maybe UnitPprInfo
Nothing -> FastString -> SDoc
forall doc. IsLine doc => FastString -> doc
ftext FastString
fs -- we didn't find the unit at all
      Just UnitPprInfo
i  -> UnitPprInfo -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitPprInfo
i

pprUnitInfoForUser :: UnitInfo -> SDoc
pprUnitInfoForUser :: UnitInfo -> SDoc
pprUnitInfoForUser UnitInfo
info = UnitPprInfo -> SDoc
forall a. Outputable a => a -> SDoc
ppr ((UnitId -> FastString) -> UnitInfo -> UnitPprInfo
forall u. (u -> FastString) -> GenUnitInfo u -> UnitPprInfo
mkUnitPprInfo UnitId -> FastString
unitIdFS UnitInfo
info)

lookupUnitPprInfo :: UnitState -> UnitId -> Maybe UnitPprInfo
lookupUnitPprInfo :: UnitState -> UnitId -> Maybe UnitPprInfo
lookupUnitPprInfo UnitState
state UnitId
uid = (UnitInfo -> UnitPprInfo) -> Maybe UnitInfo -> Maybe UnitPprInfo
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ((UnitId -> FastString) -> UnitInfo -> UnitPprInfo
forall u. (u -> FastString) -> GenUnitInfo u -> UnitPprInfo
mkUnitPprInfo UnitId -> FastString
unitIdFS) (UnitState -> UnitId -> Maybe UnitInfo
lookupUnitId UnitState
state UnitId
uid)

-- -----------------------------------------------------------------------------
-- Displaying packages

-- | Show (very verbose) package info
pprUnits :: UnitState -> SDoc
pprUnits :: UnitState -> SDoc
pprUnits = (UnitInfo -> SDoc) -> UnitState -> SDoc
pprUnitsWith UnitInfo -> SDoc
pprUnitInfo

pprUnitsWith :: (UnitInfo -> SDoc) -> UnitState -> SDoc
pprUnitsWith :: (UnitInfo -> SDoc) -> UnitState -> SDoc
pprUnitsWith UnitInfo -> SDoc
pprIPI UnitState
pkgstate =
    [SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat (SDoc -> [SDoc] -> [SDoc]
forall a. a -> [a] -> [a]
intersperse (String -> SDoc
forall doc. IsLine doc => String -> doc
text String
"---") ((UnitInfo -> SDoc) -> [UnitInfo] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map UnitInfo -> SDoc
pprIPI (UnitState -> [UnitInfo]
listUnitInfo UnitState
pkgstate)))

-- | Show simplified unit info.
--
-- The idea is to only print package id, and any information that might
-- be different from the package databases (exposure, trust)
pprUnitsSimple :: UnitState -> SDoc
pprUnitsSimple :: UnitState -> SDoc
pprUnitsSimple = (UnitInfo -> SDoc) -> UnitState -> SDoc
pprUnitsWith UnitInfo -> SDoc
forall {doc} {srcpkgid} {srcpkgname} {modulename} {mod}.
IsLine doc =>
GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> doc
pprIPI
    where pprIPI :: GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> doc
pprIPI GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
ipi = let i :: FastString
i = UnitId -> FastString
unitIdFS (GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
ipi)
                           e :: doc
e = if GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> Bool
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
unitIsExposed GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
ipi then String -> doc
forall doc. IsLine doc => String -> doc
text String
"E" else String -> doc
forall doc. IsLine doc => String -> doc
text String
" "
                           t :: doc
t = if GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod -> Bool
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool
unitIsTrusted GenericUnitInfo srcpkgid srcpkgname UnitId modulename mod
ipi then String -> doc
forall doc. IsLine doc => String -> doc
text String
"T" else String -> doc
forall doc. IsLine doc => String -> doc
text String
" "
                       in doc
e doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> doc
t doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> String -> doc
forall doc. IsLine doc => String -> doc
text String
"  " doc -> doc -> doc
forall doc. IsLine doc => doc -> doc -> doc
<> FastString -> doc
forall doc. IsLine doc => FastString -> doc
ftext FastString
i

-- | Show the mapping of modules to where they come from.
pprModuleMap :: ModuleNameProvidersMap -> SDoc
pprModuleMap :: ModuleNameProvidersMap -> SDoc
pprModuleMap ModuleNameProvidersMap
mod_map =
  [SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat (((ModuleName, UniqMap Module ModuleOrigin) -> SDoc)
-> [(ModuleName, UniqMap Module ModuleOrigin)] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName, UniqMap Module ModuleOrigin) -> SDoc
forall {a}. Outputable a => (ModuleName, UniqMap Module a) -> SDoc
pprLine (ModuleNameProvidersMap
-> [(ModuleName, UniqMap Module ModuleOrigin)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList ModuleNameProvidersMap
mod_map))
    where
      pprLine :: (ModuleName, UniqMap Module a) -> SDoc
pprLine (ModuleName
m,UniqMap Module a
e) = ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
m SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ Int -> SDoc -> SDoc
nest Int
50 ([SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat (((Module, a) -> SDoc) -> [(Module, a)] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (ModuleName -> (Module, a) -> SDoc
forall a. Outputable a => ModuleName -> (Module, a) -> SDoc
pprEntry ModuleName
m) (UniqMap Module a -> [(Module, a)]
forall k a. UniqMap k a -> [(k, a)]
nonDetUniqMapToList UniqMap Module a
e)))
      pprEntry :: Outputable a => ModuleName -> (Module, a) -> SDoc
      pprEntry :: forall a. Outputable a => ModuleName -> (Module, a) -> SDoc
pprEntry ModuleName
m (Module
m',a
o)
        | ModuleName
m ModuleName -> ModuleName -> Bool
forall a. Eq a => a -> a -> Bool
== Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m' = Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit Module
m') SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
o)
        | Bool
otherwise = Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr Module
m' SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
o)

fsPackageName :: UnitInfo -> FastString
fsPackageName :: UnitInfo -> FastString
fsPackageName UnitInfo
info = FastString
fs
   where
      PackageName FastString
fs = UnitInfo -> PackageName
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod
-> srcpkgname
unitPackageName UnitInfo
info


-- | Given a fully instantiated 'InstantiatedUnit', improve it into a
-- 'RealUnit' if we can find it in the package database.
improveUnit :: UnitState -> Unit -> Unit
improveUnit :: UnitState -> Unit -> Unit
improveUnit UnitState
state Unit
u = UnitInfoMap -> PreloadUnitClosure -> Unit -> Unit
improveUnit' (UnitState -> UnitInfoMap
unitInfoMap UnitState
state) (UnitState -> PreloadUnitClosure
preloadClosure UnitState
state) Unit
u

-- | Given a fully instantiated 'InstantiatedUnit', improve it into a
-- 'RealUnit' if we can find it in the package database.
improveUnit' :: UnitInfoMap -> PreloadUnitClosure -> Unit -> Unit
improveUnit' :: UnitInfoMap -> PreloadUnitClosure -> Unit -> Unit
improveUnit' UnitInfoMap
_       PreloadUnitClosure
_       uid :: Unit
uid@(RealUnit Definite UnitId
_) = Unit
uid -- short circuit
improveUnit' UnitInfoMap
pkg_map PreloadUnitClosure
closure Unit
uid =
    -- Do NOT lookup indefinite ones, they won't be useful!
    case Bool -> UnitInfoMap -> PreloadUnitClosure -> Unit -> Maybe UnitInfo
lookupUnit' Bool
False UnitInfoMap
pkg_map PreloadUnitClosure
closure Unit
uid of
        Maybe UnitInfo
Nothing  -> Unit
uid
        Just UnitInfo
pkg ->
            -- Do NOT improve if the indefinite unit id is not
            -- part of the closure unique set.  See
            -- Note [VirtUnit to RealUnit improvement]
            if UnitInfo -> UnitId
forall srcpkgid srcpkgname uid modulename mod.
GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> uid
unitId UnitInfo
pkg UnitId -> PreloadUnitClosure -> Bool
forall a. Uniquable a => a -> UniqSet a -> Bool
`elementOfUniqSet` PreloadUnitClosure
closure
                then UnitInfo -> Unit
mkUnit UnitInfo
pkg
                else Unit
uid

-- | Check the database to see if we already have an installed unit that
-- corresponds to the given 'InstantiatedUnit'.
--
-- Return a `UnitId` which either wraps the `InstantiatedUnit` unchanged or
-- references a matching installed unit.
--
-- See Note [VirtUnit to RealUnit improvement]
instUnitToUnit :: UnitState -> InstantiatedUnit -> Unit
instUnitToUnit :: UnitState -> GenInstantiatedUnit UnitId -> Unit
instUnitToUnit UnitState
state GenInstantiatedUnit UnitId
iuid =
    -- NB: suppose that we want to compare the instantiated
    -- unit p[H=impl:H] against p+abcd (where p+abcd
    -- happens to be the existing, installed version of
    -- p[H=impl:H].  If we *only* wrap in p[H=impl:H]
    -- VirtUnit, they won't compare equal; only
    -- after improvement will the equality hold.
    UnitState -> Unit -> Unit
improveUnit UnitState
state (Unit -> Unit) -> Unit -> Unit
forall a b. (a -> b) -> a -> b
$ GenInstantiatedUnit UnitId -> Unit
forall uid. GenInstantiatedUnit uid -> GenUnit uid
VirtUnit GenInstantiatedUnit UnitId
iuid


-- | Substitution on module variables, mapping module names to module
-- identifiers.
type ShHoleSubst = ModuleNameEnv Module

-- | Substitutes holes in a 'Module'.  NOT suitable for being called
-- directly on a 'nameModule', see Note [Representation of module/name variables].
-- @p[A=\<A>]:B@ maps to @p[A=q():A]:B@ with @A=q():A@;
-- similarly, @\<A>@ maps to @q():A@.
renameHoleModule :: UnitState -> ShHoleSubst -> Module -> Module
renameHoleModule :: UnitState -> UniqFM ModuleName Module -> Module -> Module
renameHoleModule UnitState
state = UnitInfoMap
-> PreloadUnitClosure
-> UniqFM ModuleName Module
-> Module
-> Module
renameHoleModule' (UnitState -> UnitInfoMap
unitInfoMap UnitState
state) (UnitState -> PreloadUnitClosure
preloadClosure UnitState
state)

-- | Substitutes holes in a 'Unit', suitable for renaming when
-- an include occurs; see Note [Representation of module/name variables].
--
-- @p[A=\<A>]@ maps to @p[A=\<B>]@ with @A=\<B>@.
renameHoleUnit :: UnitState -> ShHoleSubst -> Unit -> Unit
renameHoleUnit :: UnitState -> UniqFM ModuleName Module -> Unit -> Unit
renameHoleUnit UnitState
state = UnitInfoMap
-> PreloadUnitClosure -> UniqFM ModuleName Module -> Unit -> Unit
renameHoleUnit' (UnitState -> UnitInfoMap
unitInfoMap UnitState
state) (UnitState -> PreloadUnitClosure
preloadClosure UnitState
state)

-- | Like 'renameHoleModule', but requires only 'ClosureUnitInfoMap'
-- so it can be used by "GHC.Unit.State".
renameHoleModule' :: UnitInfoMap -> PreloadUnitClosure -> ShHoleSubst -> Module -> Module
renameHoleModule' :: UnitInfoMap
-> PreloadUnitClosure
-> UniqFM ModuleName Module
-> Module
-> Module
renameHoleModule' UnitInfoMap
pkg_map PreloadUnitClosure
closure UniqFM ModuleName Module
env Module
m
  | Bool -> Bool
not (Module -> Bool
forall u. GenModule (GenUnit u) -> Bool
isHoleModule Module
m) =
        let uid :: Unit
uid = UnitInfoMap
-> PreloadUnitClosure -> UniqFM ModuleName Module -> Unit -> Unit
renameHoleUnit' UnitInfoMap
pkg_map PreloadUnitClosure
closure UniqFM ModuleName Module
env (Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit Module
m)
        in Unit -> ModuleName -> Module
forall unit. unit -> ModuleName -> GenModule unit
mkModule Unit
uid (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m)
  | Just Module
m' <- UniqFM ModuleName Module -> ModuleName -> Maybe Module
forall key elt. Uniquable key => UniqFM key elt -> key -> Maybe elt
lookupUFM UniqFM ModuleName Module
env (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m) = Module
m'
  -- NB m = <Blah>, that's what's in scope.
  | Bool
otherwise = Module
m

-- | Like 'renameHoleUnit, but requires only 'ClosureUnitInfoMap'
-- so it can be used by "GHC.Unit.State".
renameHoleUnit' :: UnitInfoMap -> PreloadUnitClosure -> ShHoleSubst -> Unit -> Unit
renameHoleUnit' :: UnitInfoMap
-> PreloadUnitClosure -> UniqFM ModuleName Module -> Unit -> Unit
renameHoleUnit' UnitInfoMap
pkg_map PreloadUnitClosure
closure UniqFM ModuleName Module
env Unit
uid =
    case Unit
uid of
      (VirtUnit
        InstantiatedUnit{ instUnitInstanceOf :: forall unit. GenInstantiatedUnit unit -> unit
instUnitInstanceOf = UnitId
cid
                        , instUnitInsts :: forall unit. GenInstantiatedUnit unit -> GenInstantiations unit
instUnitInsts      = [(ModuleName, Module)]
insts
                        , instUnitHoles :: forall unit. GenInstantiatedUnit unit -> UniqDSet ModuleName
instUnitHoles      = UniqDSet ModuleName
fh })
          -> if UniqFM ModuleName ModuleName -> Bool
forall {k} (key :: k) elt. UniqFM key elt -> Bool
isNullUFM ((ModuleName -> Module -> ModuleName)
-> UniqFM ModuleName ModuleName
-> UniqFM ModuleName Module
-> UniqFM ModuleName ModuleName
forall {k} elt1 elt2 elt3 (key :: k).
(elt1 -> elt2 -> elt3)
-> UniqFM key elt1 -> UniqFM key elt2 -> UniqFM key elt3
intersectUFM_C ModuleName -> Module -> ModuleName
forall a b. a -> b -> a
const (UniqDFM ModuleName ModuleName -> UniqFM ModuleName ModuleName
forall {k} (key :: k) elt. UniqDFM key elt -> UniqFM key elt
udfmToUfm (UniqDSet ModuleName -> UniqDFM ModuleName ModuleName
forall a. UniqDSet a -> UniqDFM a a
getUniqDSet UniqDSet ModuleName
fh)) UniqFM ModuleName Module
env)
                then Unit
uid
                -- Functorially apply the substitution to the instantiation,
                -- then check the 'ClosureUnitInfoMap' to see if there is
                -- a compiled version of this 'InstantiatedUnit' we can improve to.
                -- See Note [VirtUnit to RealUnit improvement]
                else UnitInfoMap -> PreloadUnitClosure -> Unit -> Unit
improveUnit' UnitInfoMap
pkg_map PreloadUnitClosure
closure (Unit -> Unit) -> Unit -> Unit
forall a b. (a -> b) -> a -> b
$
                        UnitId -> [(ModuleName, Module)] -> Unit
forall u.
IsUnitId u =>
u -> [(ModuleName, GenModule (GenUnit u))] -> GenUnit u
mkVirtUnit UnitId
cid
                            (((ModuleName, Module) -> (ModuleName, Module))
-> [(ModuleName, Module)] -> [(ModuleName, Module)]
forall a b. (a -> b) -> [a] -> [b]
map (\(ModuleName
k,Module
v) -> (ModuleName
k, UnitInfoMap
-> PreloadUnitClosure
-> UniqFM ModuleName Module
-> Module
-> Module
renameHoleModule' UnitInfoMap
pkg_map PreloadUnitClosure
closure UniqFM ModuleName Module
env Module
v)) [(ModuleName, Module)]
insts)
      Unit
_ -> Unit
uid

-- | Injects an 'InstantiatedModule' to 'Module' (see also
-- 'instUnitToUnit'.
instModuleToModule :: UnitState -> InstantiatedModule -> Module
instModuleToModule :: UnitState -> InstantiatedModule -> Module
instModuleToModule UnitState
pkgstate (Module GenInstantiatedUnit UnitId
iuid ModuleName
mod_name) =
    Unit -> ModuleName -> Module
forall unit. unit -> ModuleName -> GenModule unit
mkModule (UnitState -> GenInstantiatedUnit UnitId -> Unit
instUnitToUnit UnitState
pkgstate GenInstantiatedUnit UnitId
iuid) ModuleName
mod_name

-- | Print unit-ids with UnitInfo found in the given UnitState
pprWithUnitState :: UnitState -> SDoc -> SDoc
pprWithUnitState :: UnitState -> SDoc -> SDoc
pprWithUnitState UnitState
state = (SDocContext -> SDocContext) -> SDoc -> SDoc
updSDocContext (\SDocContext
ctx -> SDocContext
ctx
   { sdocUnitIdForUser = \FastString
fs -> UnitState -> UnitId -> SDoc
pprUnitIdForUser UnitState
state (FastString -> UnitId
UnitId FastString
fs)
   })