-- | Unit identifier pretty-printing
module GHC.Unit.Ppr
   ( UnitPprInfo (..)
   )
where

import GHC.Prelude
import GHC.Data.FastString
import GHC.Utils.Outputable
import Data.Version

-- | Subset of UnitInfo: just enough to pretty-print a unit-id
--
-- Instead of printing the unit-id which may contain a hash, we print:
--    package-version:componentname
--
data UnitPprInfo = UnitPprInfo
   { UnitPprInfo -> FastString
unitPprId             :: FastString   -- ^ Identifier
   , UnitPprInfo -> String
unitPprPackageName    :: String       -- ^ Source package name
   , UnitPprInfo -> Version
unitPprPackageVersion :: Version      -- ^ Source package version
   , UnitPprInfo -> Maybe String
unitPprComponentName  :: Maybe String -- ^ Component name
   }

instance Outputable UnitPprInfo where
  ppr :: UnitPprInfo -> SDoc
ppr UnitPprInfo
pprinfo = (Bool -> SDoc) -> SDoc
getPprDebug forall a b. (a -> b) -> a -> b
$ \Bool
debug ->
    if Bool
debug
       then FastString -> SDoc
ftext (UnitPprInfo -> FastString
unitPprId UnitPprInfo
pprinfo)
       else String -> SDoc
text forall a b. (a -> b) -> a -> b
$ forall a. Monoid a => [a] -> a
mconcat
         [ UnitPprInfo -> String
unitPprPackageName UnitPprInfo
pprinfo
         , case UnitPprInfo -> Version
unitPprPackageVersion UnitPprInfo
pprinfo of
            Version [] [] -> String
""
            Version
version       -> String
"-" forall a. [a] -> [a] -> [a]
++ Version -> String
showVersion Version
version
         , case UnitPprInfo -> Maybe String
unitPprComponentName UnitPprInfo
pprinfo of
            Maybe String
Nothing    -> String
""
            Just String
cname -> String
":" forall a. [a] -> [a] -> [a]
++ String
cname
         ]