{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
module Distribution.Types.PackageId
  ( PackageIdentifier(..)
  , PackageId
  ) where

import Distribution.Compat.Prelude
import Prelude ()

import Distribution.Parsec            (Parsec (..), simpleParsec)
import Distribution.Pretty
import Distribution.Types.PackageName
import Distribution.Version           (Version, nullVersion)

import qualified Data.List.NonEmpty              as NE
import qualified Distribution.Compat.CharParsing as P
import qualified Text.PrettyPrint                as Disp

-- | Type alias so we can use the shorter name PackageId.
type PackageId = PackageIdentifier

-- | The name and version of a package.
data PackageIdentifier
    = PackageIdentifier {
        PackageIdentifier -> PackageName
pkgName    :: PackageName, -- ^The name of this package, eg. foo
        PackageIdentifier -> Version
pkgVersion :: Version -- ^the version of this package, eg 1.2
     }
     deriving ((forall x. PackageIdentifier -> Rep PackageIdentifier x)
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instance Binary PackageIdentifier
instance Structured PackageIdentifier

instance Pretty PackageIdentifier where
  pretty :: PackageIdentifier -> Doc
pretty (PackageIdentifier PackageName
n Version
v)
    | Version
v Version -> Version -> Bool
forall a. Eq a => a -> a -> Bool
== Version
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forall a. Pretty a => a -> Doc
pretty PackageName
n -- if no version, don't show version.
    | Bool
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-- |
--
-- >>> simpleParsec "foo-bar-0" :: Maybe PackageIdentifier
-- Just (PackageIdentifier {pkgName = PackageName "foo-bar", pkgVersion = mkVersion [0]})
--
-- >>> simpleParsec "foo-bar" :: Maybe PackageIdentifier
-- Just (PackageIdentifier {pkgName = PackageName "foo-bar", pkgVersion = mkVersion []})
--
-- /Note:/ Stricter than 'Text' instance
--
-- >>> simpleParsec "foo-bar-0-0" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "foo-bar.0" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "foo-bar.4-2" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "1.2.3" :: Maybe PackageIdentifier
-- Nothing
--
instance Parsec PackageIdentifier where
  parsec :: forall (m :: * -> *). CabalParsing m => m PackageIdentifier
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c Bool -> Bool -> Bool
&& Bool -> Bool
not ((Char -> Bool) -> String -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
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isDigit String
c)) [String]
xs
      then PackageIdentifier -> m PackageIdentifier
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (PackageIdentifier -> m PackageIdentifier)
-> PackageIdentifier -> m PackageIdentifier
forall a b. (a -> b) -> a -> b
$ PackageName -> Version -> PackageIdentifier
PackageIdentifier (String -> PackageName
mkPackageName (String -> [String] -> String
forall a. [a] -> [[a]] -> [a]
intercalate  String
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xs)) Version
v
      else String -> m PackageIdentifier
forall a. String -> m a
forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"all digits or a dot in a portion of package name"
    where
      component :: m String
component = (Char -> Bool) -> m String
forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m String
P.munch1 (\Char
c ->  Char -> Bool
isAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'.')

instance NFData PackageIdentifier where
    rnf :: PackageIdentifier -> ()
rnf (PackageIdentifier PackageName
name Version
version) = PackageName -> ()
forall a. NFData a => a -> ()
rnf PackageName
name () -> () -> ()
forall a b. a -> b -> b
`seq` Version -> ()
forall a. NFData a => a -> ()
rnf Version
version