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-- | 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
{ unitPprId :: FastString -- ^ Identifier
, unitPprPackageName :: String -- ^ Source package name
, unitPprPackageVersion :: Version -- ^ Source package version
, unitPprComponentName :: Maybe String -- ^ Component name
}
instance Outputable UnitPprInfo where
ppr pprinfo = getPprDebug $ \debug ->
if debug
then ftext (unitPprId pprinfo)
else text $ mconcat
[ unitPprPackageName pprinfo
, case unitPprPackageVersion pprinfo of
Version [] [] -> ""
version -> "-" ++ showVersion version
, case unitPprComponentName pprinfo of
Nothing -> ""
Just cname -> ":" ++ cname
]
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