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|
-- cabal-helper: Simple interface to Cabal's configuration state
-- Copyright (C) 2015 Daniel Gröber <dxld ÄT darkboxed DOT org>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
{-# LANGUAGE RecordWildCards, FlexibleContexts #-}
module Main where
import Control.Applicative
import Control.Monad
import Data.Char
import Data.List
import Data.Maybe
import Data.String
import Text.Printf
import System.Console.GetOpt
import System.Environment
import System.Directory
import System.FilePath
import System.Process
import System.Exit
import System.IO
import Prelude
import Distribution.System (buildPlatform)
import Distribution.Text (display)
import Distribution.Verbosity (silent, deafening)
import Distribution.PackageDescription.Parse (readPackageDescription)
import Distribution.Package (packageName, packageVersion)
import Paths_cabal_helper (version)
import CabalHelper.Compiletime.Compat.Version
import CabalHelper.Compiletime.Compile
import CabalHelper.Compiletime.GuessGhc
import CabalHelper.Compiletime.Types
import CabalHelper.Shared.Common
import CabalHelper.Shared.InterfaceTypes
usage :: IO ()
usage = do
prog <- getProgName
hPutStr stderr $ "Usage: " ++ prog ++ " " ++ usageMsg
where
usageMsg = "\
\( print-appcachedir\n\
\| print-build-platform\n\
\| [--verbose]\n\
\ [--with-ghc=GHC_PATH]\n\
\ [--with-ghc-pkg=GHC_PKG_PATH]\n\
\ [--with-cabal=CABAL_PATH]\n\
\ [--with-cabal-version=VERSION]\n\
\ [--with-cabal-pkg-db=PKG_DB]\n\
\ PROJ_DIR DIST_DIR ( print-exe | package-id | [CABAL_HELPER_ARGS...] ) )\n"
globalArgSpec :: [OptDescr (Options -> Options)]
globalArgSpec =
[ option "" ["verbose"] "Be more verbose" $
NoArg $ \o -> o { verbose = True }
, option "" ["with-ghc"] "GHC executable to use" $
reqArg "PROG" $ \p o -> o { ghcProgram = p }
, option "" ["with-ghc-pkg"] "ghc-pkg executable to use (only needed when guessing from GHC path fails)" $
reqArg "PROG" $ \p o -> o { ghcPkgProgram = p }
, option "" ["with-cabal"] "cabal-install executable to use" $
reqArg "PROG" $ \p o -> o { cabalProgram = p }
, option "" ["with-cabal-version"] "Cabal library version to use" $
reqArg "VERSION" $ \p o -> o { cabalVersion = Just $ parseVer p }
, option "" ["with-cabal-pkg-db"] "package database to look for Cabal library in" $
reqArg "PKG_DB" $ \p o -> o { cabalPkgDb = Just (PackageDbDir p) }
]
where
option :: [Char] -> [String] -> String -> ArgDescr a -> OptDescr a
option s l udsc dsc = Option s l dsc udsc
reqArg :: String -> (String -> a) -> ArgDescr a
reqArg udsc dsc = ReqArg dsc udsc
parseCommandArgs :: Options -> [String] -> (Options, [String])
parseCommandArgs opts argv
= case getOpt RequireOrder globalArgSpec argv of
(o,r,[]) -> (foldr id opts o, r)
(_,_,errs) ->
panic $ "Parsing command options failed:\n" ++ concat errs
guessProgramPaths :: Options -> IO Options
guessProgramPaths opts = do
if not (same ghcProgram opts dopts) && same ghcPkgProgram opts dopts
then do
mghcPkg <- guessToolFromGhcPath "ghc-pkg" (ghcProgram opts)
return opts {
ghcPkgProgram = fromMaybe (ghcPkgProgram opts) mghcPkg
}
else return opts
where
same f o o' = f o == f o'
dopts = defaultOptions
overrideVerbosityEnvVar :: Options -> IO Options
overrideVerbosityEnvVar opts = do
x <- lookup "CABAL_HELPER_DEBUG" <$> getEnvironment
return $ case x of
Just _ -> opts { verbose = True }
Nothing -> opts
main :: IO ()
main = handlePanic $ do
(opts', args) <- parseCommandArgs defaultOptions <$> getArgs
opts <- overrideVerbosityEnvVar =<< guessProgramPaths opts'
case args of
[] -> usage
"help":[] -> usage
"version":[] -> putStrLn $ showVersion version
"print-appdatadir":[] -> putStrLn =<< appCacheDir
"print-appcachedir":[] -> putStrLn =<< appCacheDir
"print-build-platform":[] -> putStrLn $ display buildPlatform
projdir:_distdir:"package-id":[] -> do
let v | verbose opts = deafening
| otherwise = silent
-- ghc-mod will catch multiple cabal files existing before we get here
[cfile] <- filter isCabalFile <$> getDirectoryContents projdir
gpd <- readPackageDescription v (projdir </> cfile)
putStrLn $ show $
[Just $ ChResponseVersion (display (packageName gpd)) (toDataVersion $ packageVersion gpd)]
projdir:distdir:args' -> do
cfgf <- canonicalizePath (distdir </> "setup-config")
mhdr <- getCabalConfigHeader cfgf
case mhdr of
Nothing -> panic $ printf "\
\Could not read Cabal's persistent setup configuration header\n\
\- Check first line of: %s\n\
\- Maybe try: $ cabal configure" cfgf
Just (hdrCabalVersion, _) -> do
case cabalVersion opts of
Just ver | hdrCabalVersion /= ver -> panic $ printf "\
\Cabal version %s was requested but setup configuration was\n\
\written by version %s" (showVersion ver) (showVersion hdrCabalVersion)
_ -> do
eexe <- compileHelper opts hdrCabalVersion projdir distdir
case eexe of
Left e -> exitWith e
Right exe ->
case args' of
"print-exe":_ -> putStrLn exe
_ -> do
(_,_,_,h) <- createProcess $ proc exe args
exitWith =<< waitForProcess h
_ -> error "invalid command line"
|
