Safe Haskell	None
Language	Haskell2010

Packages

Contents

Reading the package config, and processing cmdline args
Querying the package config
Inspecting the set of packages in scope
Utils

Description

Package manipulation

Synopsis

module PackageConfig
data PackageState
data PackageConfigMap
emptyPackageState :: PackageState
initPackages :: DynFlags -> IO (DynFlags, [PreloadUnitId])
readPackageConfigs :: DynFlags -> IO [(FilePath, [PackageConfig])]
getPackageConfRefs :: DynFlags -> IO [PkgConfRef]
resolvePackageConfig :: DynFlags -> PkgConfRef -> IO (Maybe FilePath)
readPackageConfig :: DynFlags -> FilePath -> IO (FilePath, [PackageConfig])
listPackageConfigMap :: DynFlags -> [PackageConfig]
lookupPackage :: DynFlags -> UnitId -> Maybe PackageConfig
lookupPackage' :: Bool -> PackageConfigMap -> UnitId -> Maybe PackageConfig
lookupInstalledPackage :: DynFlags -> InstalledUnitId -> Maybe PackageConfig
lookupPackageName :: DynFlags -> PackageName -> Maybe ComponentId
improveUnitId :: PackageConfigMap -> UnitId -> UnitId
searchPackageId :: DynFlags -> SourcePackageId -> [PackageConfig]
getPackageDetails :: DynFlags -> UnitId -> PackageConfig
getInstalledPackageDetails :: DynFlags -> InstalledUnitId -> PackageConfig
componentIdString :: DynFlags -> ComponentId -> Maybe String
displayInstalledUnitId :: DynFlags -> InstalledUnitId -> Maybe String
listVisibleModuleNames :: DynFlags -> [ModuleName]
lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(Module, PackageConfig)]
lookupModuleWithSuggestions :: DynFlags -> ModuleName -> Maybe FastString -> LookupResult
lookupPluginModuleWithSuggestions :: DynFlags -> ModuleName -> Maybe FastString -> LookupResult
data LookupResult
- = LookupFound Module PackageConfig
- | LookupMultiple [(Module, ModuleOrigin)]
- | LookupHidden [(Module, ModuleOrigin)] [(Module, ModuleOrigin)]
- | LookupNotFound [ModuleSuggestion]
data ModuleSuggestion
- = SuggestVisible ModuleName Module ModuleOrigin
- | SuggestHidden ModuleName Module ModuleOrigin
data ModuleOrigin
- = ModHidden
- | ModOrigin {
  - fromOrigPackage :: Maybe Bool
  - fromExposedReexport :: [PackageConfig]
  - fromHiddenReexport :: [PackageConfig]
  - fromPackageFlag :: Bool
  }
getPackageIncludePath :: DynFlags -> [PreloadUnitId] -> IO [String]
getPackageLibraryPath :: DynFlags -> [PreloadUnitId] -> IO [String]
getPackageLinkOpts :: DynFlags -> [PreloadUnitId] -> IO ([String], [String], [String])
getPackageExtraCcOpts :: DynFlags -> [PreloadUnitId] -> IO [String]
getPackageFrameworkPath :: DynFlags -> [PreloadUnitId] -> IO [String]
getPackageFrameworks :: DynFlags -> [PreloadUnitId] -> IO [String]
getPackageConfigMap :: DynFlags -> PackageConfigMap
getPreloadPackagesAnd :: DynFlags -> [PreloadUnitId] -> IO [PackageConfig]
collectArchives :: DynFlags -> PackageConfig -> IO [FilePath]
collectIncludeDirs :: [PackageConfig] -> [FilePath]
collectLibraryPaths :: DynFlags -> [PackageConfig] -> [FilePath]
collectLinkOpts :: DynFlags -> [PackageConfig] -> ([String], [String], [String])
packageHsLibs :: DynFlags -> PackageConfig -> [String]
unwireUnitId :: DynFlags -> UnitId -> UnitId
pprFlag :: PackageFlag -> SDoc
pprPackages :: DynFlags -> SDoc
pprPackagesSimple :: DynFlags -> SDoc
pprModuleMap :: ModuleToPkgConfAll -> SDoc
isDllName :: DynFlags -> Module -> Name -> Bool

Documentation

module PackageConfig

Reading the package config, and processing cmdline args

data PackageState Source #

data PackageConfigMap Source #

UniqFM map from UnitId to PackageConfig, plus the transitive closure of preload packages.

emptyPackageState :: PackageState Source #

initPackages :: DynFlags -> IO (DynFlags, [PreloadUnitId]) Source #

Call this after parseDynFlags. It reads the package database files, and sets up various internal tables of package information, according to the package-related flags on the command-line (-package, -hide-package etc.)

Returns a list of packages to link in if we're doing dynamic linking. This list contains the packages that the user explicitly mentioned with -package flags.

initPackages can be called again subsequently after updating the packageFlags field of the DynFlags, and it will update the pkgState in DynFlags and return a list of packages to link in.

readPackageConfigs :: DynFlags -> IO [(FilePath, [PackageConfig])] Source #

getPackageConfRefs :: DynFlags -> IO [PkgConfRef] Source #

resolvePackageConfig :: DynFlags -> PkgConfRef -> IO (Maybe FilePath) Source #

readPackageConfig :: DynFlags -> FilePath -> IO (FilePath, [PackageConfig]) Source #

listPackageConfigMap :: DynFlags -> [PackageConfig] Source #

Get a list of entries from the package database. NB: be careful with this function, although all packages in this map are "visible", this does not imply that the exposed-modules of the package are available (they may have been thinned or renamed).

Querying the package config

lookupPackage :: DynFlags -> UnitId -> Maybe PackageConfig Source #

Find the package we know about with the given unit id, if any

lookupPackage' :: Bool -> PackageConfigMap -> UnitId -> Maybe PackageConfig Source #

A more specialized interface, which takes a boolean specifying whether or not to look for on-the-fly renamed interfaces, and just a PackageConfigMap rather than a DynFlags (so it can be used while we're initializing DynFlags

lookupInstalledPackage :: DynFlags -> InstalledUnitId -> Maybe PackageConfig Source #

lookupPackageName :: DynFlags -> PackageName -> Maybe ComponentId Source #

Find the package 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)

improveUnitId :: PackageConfigMap -> UnitId -> UnitId Source #

Given a fully instantiated UnitId, improve it into a InstalledUnitId if we can find it in the package database.

searchPackageId :: DynFlags -> SourcePackageId -> [PackageConfig] Source #

Search for packages with a given package ID (e.g. "foo-0.1")

getPackageDetails :: DynFlags -> UnitId -> PackageConfig Source #

Looks up the package with the given id in the package state, panicing if it is not found

getInstalledPackageDetails :: DynFlags -> InstalledUnitId -> PackageConfig Source #

componentIdString :: DynFlags -> ComponentId -> Maybe String Source #

displayInstalledUnitId :: DynFlags -> InstalledUnitId -> Maybe String Source #

listVisibleModuleNames :: DynFlags -> [ModuleName] Source #

lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(Module, PackageConfig)] Source #

Takes a ModuleName, and if the module is in any package returns list of modules which take that name.

lookupModuleWithSuggestions :: DynFlags -> ModuleName -> Maybe FastString -> LookupResult Source #

lookupPluginModuleWithSuggestions :: DynFlags -> ModuleName -> Maybe FastString -> LookupResult Source #

data LookupResult Source #

The result of performing a lookup

Constructors

LookupFound Module PackageConfig	Found the module uniquely, nothing else to do
LookupMultiple [(Module, ModuleOrigin)]	Multiple modules with the same name in scope
LookupHidden [(Module, ModuleOrigin)] [(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
LookupNotFound [ModuleSuggestion]	Nothing found, here are some suggested different names

data ModuleSuggestion Source #

Constructors

SuggestVisible ModuleName Module ModuleOrigin
SuggestHidden ModuleName Module ModuleOrigin

data ModuleOrigin Source #

Package state is all stored in DynFlags, including the details of all packages, which packages are exposed, and which modules they provide.

The package state is computed by initPackages, and kept in DynFlags. It is influenced by various package 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 package state has the following properties.

Let exposedPackages be the set of packages thus exposed. Let depExposedPackages be the transitive closure from exposedPackages of their dependencies.
When searching for a module from a preload import declaration, only the exposed modules in exposedPackages are valid.
When searching for a module from an implicit import, all modules from depExposedPackages 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.

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!

Constructors

ModHidden	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.)
ModOrigin	Module is public, and could have come from some places.
Fields fromOrigPackage :: Maybe Bool `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. fromExposedReexport :: [PackageConfig] Is the module available from a reexport of an exposed package? There could be multiple. fromHiddenReexport :: [PackageConfig] Is the module available from a reexport of a hidden package? fromPackageFlag :: Bool Did the module export come from a package flag? (ToDo: track more information.

Instances

Semigroup ModuleOrigin Source #
Instance details Methods (<>) :: ModuleOrigin -> ModuleOrigin -> ModuleOrigin Source # sconcat :: NonEmpty ModuleOrigin -> ModuleOrigin Source # stimes :: Integral b => b -> ModuleOrigin -> ModuleOrigin Source #
Monoid ModuleOrigin Source #
Instance details Methods mempty :: ModuleOrigin Source # mappend :: ModuleOrigin -> ModuleOrigin -> ModuleOrigin Source # mconcat :: [ModuleOrigin] -> ModuleOrigin Source #
Outputable ModuleOrigin Source #
Instance details Methods ppr :: ModuleOrigin -> SDoc Source # pprPrec :: Rational -> ModuleOrigin -> SDoc Source #

Inspecting the set of packages in scope

getPackageIncludePath :: DynFlags -> [PreloadUnitId] -> IO [String] Source #

Find all the include directories in these and the preload packages

getPackageLibraryPath :: DynFlags -> [PreloadUnitId] -> IO [String] Source #

Find all the library paths in these and the preload packages

getPackageLinkOpts :: DynFlags -> [PreloadUnitId] -> IO ([String], [String], [String]) Source #

Find all the link options in these and the preload packages, returning (package hs lib options, extra library options, other flags)

getPackageExtraCcOpts :: DynFlags -> [PreloadUnitId] -> IO [String] Source #

Find all the C-compiler options in these and the preload packages

getPackageFrameworkPath :: DynFlags -> [PreloadUnitId] -> IO [String] Source #

Find all the package framework paths in these and the preload packages

getPackageFrameworks :: DynFlags -> [PreloadUnitId] -> IO [String] Source #

Find all the package frameworks in these and the preload packages

getPackageConfigMap :: DynFlags -> PackageConfigMap Source #

Retrieve the PackageConfigMap from DynFlags; used in the hs-boot loop-breaker.

getPreloadPackagesAnd :: DynFlags -> [PreloadUnitId] -> IO [PackageConfig] Source #

Find all the PackageConfig in both the preload packages from DynFlags and corresponding to the list of PackageConfigs

collectArchives :: DynFlags -> PackageConfig -> IO [FilePath] Source #

collectIncludeDirs :: [PackageConfig] -> [FilePath] Source #

collectLibraryPaths :: DynFlags -> [PackageConfig] -> [FilePath] Source #

collectLinkOpts :: DynFlags -> [PackageConfig] -> ([String], [String], [String]) Source #

packageHsLibs :: DynFlags -> PackageConfig -> [String] Source #

Utils

unwireUnitId :: DynFlags -> UnitId -> UnitId Source #

Given a wired-in UnitId, "unwire" it into the UnitId that it was recorded as in the package database.

pprFlag :: PackageFlag -> SDoc Source #

pprPackages :: DynFlags -> SDoc Source #

Show (very verbose) package info

pprPackagesSimple :: DynFlags -> SDoc Source #

Show simplified package info.

The idea is to only print package id, and any information that might be different from the package databases (exposure, trust)

pprModuleMap :: ModuleToPkgConfAll -> SDoc Source #

Show the mapping of modules to where they come from.

isDllName :: DynFlags -> Module -> Name -> Bool Source #

Will the Name come from a dynamically linked library?