module Stack.Options.ResolverParser where

import Data.Monoid.Extra

import qualified Data.Text as T

import Options.Applicative

import Options.Applicative.Types (readerAsk)

import Stack.Options.Utils

import Stack.Types.Compiler

import Stack.Types.Resolver

-- | Parser for the resolver

abstractResolverOptsParser :: Bool -> Parser AbstractResolver

abstractResolverOptsParser hide =

option readAbstractResolver

(long "resolver" <>

metavar "RESOLVER" <>

help "Override resolver in project file" <>

hideMods hide)

compilerOptsParser :: Bool -> Parser CompilerVersion

compilerOptsParser hide =

option readCompilerVersion

(long "compiler" <>

metavar "COMPILER" <>

help "Use the specified compiler" <>

hideMods hide)

readCompilerVersion :: ReadM CompilerVersion

readCompilerVersion = do

s <- readerAsk

case parseCompilerVersion (T.pack s) of

Nothing -> readerError $ "Failed to parse compiler: " ++ s

Just x -> return x