ghcup-hs/app/ghcup-gen/Main.hs

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{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeApplications #-}
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module Main where
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import GHCup.Types
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import GHCup.Types.JSON ( )
import GHCup.Utils.Logger
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import Data.Char ( toLower )
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#if !MIN_VERSION_base(4,13,0)
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import Data.Semigroup ( (<>) )
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#endif
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import Options.Applicative hiding ( style )
import System.Console.Pretty
import System.Exit
import System.IO ( stdout )
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import Text.Regex.Posix
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import Validate
import qualified Data.ByteString as B
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import qualified Data.Yaml as Y
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data Options = Options
{ optCommand :: Command
}
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data Command = ValidateYAML ValidateYAMLOpts
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| ValidateTarballs ValidateYAMLOpts TarballFilter
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data Input
= FileInput FilePath -- optsparse-applicative doesn't handle ByteString correctly anyway
| StdInput
fileInput :: Parser Input
fileInput =
FileInput
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<$> strOption
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(long "file" <> short 'f' <> metavar "FILENAME" <> help
"Input file to validate"
)
stdInput :: Parser Input
stdInput = flag'
StdInput
(short 'i' <> long "stdin" <> help "Validate from stdin (default)")
inputP :: Parser Input
inputP = fileInput <|> stdInput
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data ValidateYAMLOpts = ValidateYAMLOpts
{ vInput :: Maybe Input
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}
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validateYAMLOpts :: Parser ValidateYAMLOpts
validateYAMLOpts = ValidateYAMLOpts <$> optional inputP
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tarballFilterP :: Parser TarballFilter
tarballFilterP = option readm $
long "tarball-filter" <> short 'u' <> metavar "<tool>-<version>" <> value def
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<> help "Only check certain tarballs (format: <tool>-<version>)"
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where
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def = TarballFilter Nothing (makeRegex ("" :: String))
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readm = do
s <- str
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case span (/= '-') s of
(_, []) -> fail "invalid format, missing '-' after the tool name"
(t, v) | [tool] <- [ tool | tool <- [minBound..maxBound], low (show tool) == low t ] ->
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pure (TarballFilter $ Just tool) <*> makeRegexOptsM compIgnoreCase execBlank (drop 1 v)
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_ -> fail "invalid tool"
low = fmap toLower
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opts :: Parser Options
opts = Options <$> com
com :: Parser Command
com = subparser
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( command
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"check"
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( ValidateYAML
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<$> info (validateYAMLOpts <**> helper)
(progDesc "Validate the YAML")
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)
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<> command
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"check-tarballs"
(info
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((ValidateTarballs <$> validateYAMLOpts <*> tarballFilterP) <**> helper)
(progDesc "Validate all tarballs (download and checksum)")
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)
)
main :: IO ()
main = do
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_ <- customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
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>>= \Options {..} -> case optCommand of
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ValidateYAML vopts -> case vopts of
ValidateYAMLOpts { vInput = Nothing } ->
B.getContents >>= valAndExit validate
ValidateYAMLOpts { vInput = Just StdInput } ->
B.getContents >>= valAndExit validate
ValidateYAMLOpts { vInput = Just (FileInput file) } ->
B.readFile file >>= valAndExit validate
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ValidateTarballs vopts tarballFilter -> case vopts of
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ValidateYAMLOpts { vInput = Nothing } ->
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B.getContents >>= valAndExit (validateTarballs tarballFilter)
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ValidateYAMLOpts { vInput = Just StdInput } ->
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B.getContents >>= valAndExit (validateTarballs tarballFilter)
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ValidateYAMLOpts { vInput = Just (FileInput file) } ->
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B.readFile file >>= valAndExit (validateTarballs tarballFilter)
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pure ()
where
valAndExit f contents = do
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(GHCupInfo _ av) <- case Y.decodeEither' contents of
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Right r -> pure r
Left e -> die (color Red $ show e)
myLoggerT (LoggerConfig True (B.hPut stdout) (\_ -> pure ())) (f av)
>>= exitWith