{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}

module Distribution.Types.BuildType
  ( BuildType (..)
  , knownBuildTypes
  ) where

import Distribution.Compat.Prelude
import Prelude ()

import Distribution.CabalSpecVersion (CabalSpecVersion (..))
import Distribution.Parsec
import Distribution.Pretty

import qualified Distribution.Compat.CharParsing as P
import qualified Text.PrettyPrint as Disp

-- | The type of build system used by this package.
data BuildType
  = -- | calls @Distribution.Simple.defaultMain@
    Simple
  | -- | calls @Distribution.Simple.defaultMainWithHooks defaultUserHooks@,
    -- which invokes @configure@ to generate additional build
    -- information used by later phases.
    Configure
  | -- | calls @Distribution.Make.defaultMain@
    Make
  | -- | uses user-supplied @Setup.hs@ or @Setup.lhs@ (default)
    Custom
  deriving ((forall x. BuildType -> Rep BuildType x)
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instance Binary BuildType
instance Structured BuildType
instance NFData BuildType where rnf :: BuildType -> ()
rnf = BuildType -> ()
forall a. (Generic a, GNFData (Rep a)) => a -> ()
genericRnf

knownBuildTypes :: [BuildType]
knownBuildTypes :: [BuildType]
knownBuildTypes = [BuildType
Simple, BuildType
Configure, BuildType
Make, BuildType
Custom]

instance Pretty BuildType where
  pretty :: BuildType -> Doc
pretty = String -> Doc
Disp.text (String -> Doc) -> (BuildType -> String) -> BuildType -> Doc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. BuildType -> String
forall a. Show a => a -> String
show

instance Parsec BuildType where
  parsec :: forall (m :: * -> *). CabalParsing m => m BuildType
parsec = do
    name <- (Char -> Bool) -> m String
forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m String
P.munch1 Char -> Bool
isAlphaNum
    case name of
      String
"Simple" -> BuildType -> m BuildType
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return BuildType
Simple
      String
"Configure" -> BuildType -> m BuildType
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return BuildType
Configure
      String
"Custom" -> BuildType -> m BuildType
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return BuildType
Custom
      String
"Make" -> BuildType -> m BuildType
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return BuildType
Make
      String
"Default" -> do
        v <- m CabalSpecVersion
forall (m :: * -> *). CabalParsing m => m CabalSpecVersion
askCabalSpecVersion
        if v <= CabalSpecV1_18 -- oldest version needing this, based on hackage-tests
          then do
            parsecWarning PWTBuildTypeDefault "build-type: Default is parsed as Custom for legacy reasons. See https://github.com/haskell/cabal/issues/5020"
            return Custom
          else fail ("unknown build-type: '" ++ name ++ "'")
      String
_ -> String -> m BuildType
forall a. String -> m a
forall (m :: * -> *) a. MonadFail m => String -> m a
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"unknown build-type: '" String -> ShowS
forall a. [a] -> [a] -> [a]
++ String
name String -> ShowS
forall a. [a] -> [a] -> [a]
++ String
"'")