X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=utils%2Fghc-pkg%2FMain.hs;h=0f026982264257b55eb931b1e7436a8d5a93cab7;hb=0202ff18c5c6c612a7a0518a1e0bdb54d879a1f7;hp=13b9e2ffdfe728821602b48f70fe4a36ed9fd946;hpb=9e3757d1db9c14f45fd59376c2cd594893bad5b3;p=ghc-hetmet.git diff --git a/utils/ghc-pkg/Main.hs b/utils/ghc-pkg/Main.hs index 13b9e2f..0f02698 100644 --- a/utils/ghc-pkg/Main.hs +++ b/utils/ghc-pkg/Main.hs @@ -16,10 +16,11 @@ module Main (main) where import Version ( version, targetOS, targetARCH ) -import Distribution.InstalledPackageInfo +import Distribution.InstalledPackageInfo hiding (depends) import Distribution.Compat.ReadP import Distribution.ParseUtils import Distribution.Package +import Distribution.Text import Distribution.Version import System.FilePath import System.Cmd ( rawSystem ) @@ -36,14 +37,14 @@ import Data.Maybe import Data.Char ( isSpace, toLower ) import Control.Monad -import System.Directory ( doesDirectoryExist, getDirectoryContents, +import System.Directory ( doesDirectoryExist, getDirectoryContents, doesFileExist, renameFile, removeFile ) import System.Exit ( exitWith, ExitCode(..) ) import System.Environment ( getArgs, getProgName, getEnv ) import System.IO import System.IO.Error (try) import Data.List ( isPrefixOf, isSuffixOf, intersperse, sortBy, nub, - unfoldr, break ) + unfoldr, break, partition ) #if __GLASGOW_HASKELL__ > 604 import Data.List ( isInfixOf ) #else @@ -101,6 +102,7 @@ data Flag | FlagSimpleOutput | FlagNamesOnly | FlagIgnoreCase + | FlagNoUserDb deriving Eq flags :: [OptDescr Flag] @@ -113,6 +115,8 @@ flags = [ "use the specified package config file", Option [] ["global-conf"] (ReqArg FlagGlobalConfig "FILE") "location of the global package config", + Option [] ["no-user-package-conf"] (NoArg FlagNoUserDb) + "never read the user package database", Option [] ["force"] (NoArg FlagForce) "ignore missing dependencies, directories, and libraries", Option [] ["force-files"] (NoArg FlagForceFiles) @@ -188,6 +192,11 @@ usageHeader prog = substProg prog $ " Extract the specified field of the package description for the\n" ++ " specified package. Accepts comma-separated multiple fields.\n" ++ "\n" ++ + " $p dump\n" ++ + " Dump the registered description for every package. This is like\n" ++ + " \"ghc-pkg describe '*'\", except that it is intended to be used\n" ++ + " by tools that parse the results, rather than humans.\n" ++ + "\n" ++ " Substring matching is supported for {module} in find-module and\n" ++ " for {pkg} in list, describe, and field, where a '*' indicates\n" ++ " open substring ends (prefix*, *suffix, *infix*).\n" ++ @@ -270,13 +279,13 @@ runit cli nonopts = do registerPackage filename cli auto_ghci_libs True force ["unregister", pkgid_str] -> do pkgid <- readGlobPkgId pkgid_str - unregisterPackage pkgid cli + unregisterPackage pkgid cli force ["expose", pkgid_str] -> do pkgid <- readGlobPkgId pkgid_str - exposePackage pkgid cli + exposePackage pkgid cli force ["hide", pkgid_str] -> do pkgid <- readGlobPkgId pkgid_str - hidePackage pkgid cli + hidePackage pkgid cli force ["list"] -> do listPackages cli Nothing Nothing ["list", pkgid_str] -> @@ -303,6 +312,10 @@ runit cli nonopts = do (splitFields fields) ["check"] -> do checkConsistency cli + + ["dump"] -> do + dumpPackages cli + [] -> do die ("missing command\n" ++ usageInfo (usageHeader prog) flags) @@ -321,9 +334,10 @@ readGlobPkgId str = parseCheck parseGlobPackageId str "package identifier" parseGlobPackageId :: ReadP r PackageIdentifier parseGlobPackageId = - parsePackageId + parse +++ - (do n <- parsePackageName; string "-*" + (do n <- parse + string "-*" return (PackageIdentifier{ pkgName = n, pkgVersion = globVersion })) -- globVersion means "all versions" @@ -349,19 +363,31 @@ type PackageDBStack = [(PackageDBName,PackageDB)] -- A stack of package databases. Convention: head is the topmost -- in the stack. Earlier entries override later one. +allPackagesInStack :: PackageDBStack -> [InstalledPackageInfo] +allPackagesInStack = concatMap snd + getPkgDatabases :: Bool -> [Flag] -> IO PackageDBStack -getPkgDatabases modify flags = do +getPkgDatabases modify my_flags = do -- first we determine the location of the global package config. On Windows, -- this is found relative to the ghc-pkg.exe binary, whereas on Unix the -- location is passed to the binary using the --global-config flag by the -- wrapper script. let err_msg = "missing --global-conf option, location of global package.conf unknown\n" global_conf <- - case [ f | FlagGlobalConfig f <- flags ] of + case [ f | FlagGlobalConfig f <- my_flags ] of [] -> do mb_dir <- getExecDir "/bin/ghc-pkg.exe" case mb_dir of Nothing -> die err_msg - Just dir -> return (dir "package.conf") + Just dir -> + do let path1 = dir "package.conf" + path2 = dir ".." ".." ".." + "inplace-datadir" + "package.conf" + exists1 <- doesFileExist path1 + exists2 <- doesFileExist path2 + if exists1 then return path1 + else if exists2 then return path2 + else die "Can't find package.conf" fs -> return (last fs) let global_conf_dir = global_conf ++ ".d" @@ -374,19 +400,28 @@ getPkgDatabases modify flags = do , isSuffixOf ".conf" file] else return [] - -- get the location of the user package database, and create it if necessary - appdir <- getAppUserDataDirectory "ghc" + let no_user_db = FlagNoUserDb `elem` my_flags - let - subdir = targetARCH ++ '-':targetOS ++ '-':Version.version - archdir = appdir subdir - user_conf = archdir "package.conf" - user_exists <- doesFileExist user_conf + -- get the location of the user package database, and create it if necessary + -- getAppUserDataDirectory can fail (e.g. if $HOME isn't set) + appdir <- try $ getAppUserDataDirectory "ghc" + + mb_user_conf <- + if no_user_db then return Nothing else + case appdir of + Right dir -> do + let subdir = targetARCH ++ '-':targetOS ++ '-':Version.version + user_conf = dir subdir "package.conf" + user_exists <- doesFileExist user_conf + return (Just (user_conf,user_exists)) + Left ex -> + return Nothing -- If the user database doesn't exist, and this command isn't a -- "modify" command, then we won't attempt to create or use it. let sys_databases - | modify || user_exists = user_conf : global_confs ++ [global_conf] + | Just (user_conf,user_exists) <- mb_user_conf, + modify || user_exists = user_conf : global_confs ++ [global_conf] | otherwise = global_confs ++ [global_conf] e_pkg_path <- try (System.Environment.getEnv "GHC_PACKAGE_PATH") @@ -402,8 +437,10 @@ getPkgDatabases modify flags = do -- This is the database we modify by default. virt_global_conf = last env_stack - let db_flags = [ f | Just f <- map is_db_flag flags ] - where is_db_flag FlagUser = Just user_conf + let db_flags = [ f | Just f <- map is_db_flag my_flags ] + where is_db_flag FlagUser + | Just (user_conf,user_exists) <- mb_user_conf + = Just user_conf is_db_flag FlagGlobal = Just virt_global_conf is_db_flag (FlagConfig f) = Just f is_db_flag _ = Nothing @@ -426,7 +463,7 @@ getPkgDatabases modify flags = do -- stack, unless any of them are present in the stack -- already. flag_stack = filter (`notElem` env_stack) - [ f | FlagConfig f <- reverse flags ] + [ f | FlagConfig f <- reverse my_flags ] ++ env_stack modifying f @@ -442,10 +479,10 @@ getPkgDatabases modify flags = do readParseDatabase :: PackageDBName -> IO (PackageDBName,PackageDB) readParseDatabase filename = do - str <- readFile filename `Exception.catch` \_ -> return emptyPackageConfig - let packages = read str + str <- readFile filename `catchIO` \_ -> return emptyPackageConfig + let packages = map convertPackageInfoIn $ read str Exception.evaluate packages - `Exception.catch` \e-> + `catchError` \e-> die ("error while parsing " ++ filename ++ ": " ++ show e) return (filename,packages) @@ -461,8 +498,8 @@ registerPackage :: FilePath -> Bool -- update -> Force -> IO () -registerPackage input flags auto_ghci_libs update force = do - db_stack <- getPkgDatabases True flags +registerPackage input my_flags auto_ghci_libs update force = do + db_stack <- getPkgDatabases True my_flags let db_to_operate_on = my_head "db" db_stack db_filename = fst db_to_operate_on @@ -485,8 +522,7 @@ registerPackage input flags auto_ghci_libs update force = do validatePackageConfig pkg db_stack auto_ghci_libs update force let new_details = filter not_this (snd db_to_operate_on) ++ [pkg] not_this p = package p /= package pkg - savingOldConfig db_filename $ - writeNewConfig db_filename new_details + writeNewConfig db_filename new_details parsePackageInfo :: String @@ -501,39 +537,49 @@ parsePackageInfo str = -- ----------------------------------------------------------------------------- -- Exposing, Hiding, Unregistering are all similar -exposePackage :: PackageIdentifier -> [Flag] -> IO () +exposePackage :: PackageIdentifier -> [Flag] -> Force -> IO () exposePackage = modifyPackage (\p -> [p{exposed=True}]) -hidePackage :: PackageIdentifier -> [Flag] -> IO () +hidePackage :: PackageIdentifier -> [Flag] -> Force -> IO () hidePackage = modifyPackage (\p -> [p{exposed=False}]) -unregisterPackage :: PackageIdentifier -> [Flag] -> IO () -unregisterPackage = modifyPackage (\p -> []) +unregisterPackage :: PackageIdentifier -> [Flag] -> Force -> IO () +unregisterPackage = modifyPackage (\_ -> []) modifyPackage :: (InstalledPackageInfo -> [InstalledPackageInfo]) -> PackageIdentifier -> [Flag] + -> Force -> IO () -modifyPackage fn pkgid flags = do - db_stack <- getPkgDatabases True{-modify-} flags - let ((db_name, pkgs) : _) = db_stack +modifyPackage fn pkgid my_flags force = do + db_stack <- getPkgDatabases True{-modify-} my_flags + let old_broken = brokenPackages (allPackagesInStack db_stack) + let ((db_name, pkgs) : rest_of_stack) = db_stack ps <- findPackages [(db_name,pkgs)] (Id pkgid) let pids = map package ps let new_config = concat (map modify pkgs) modify pkg | package pkg `elem` pids = fn pkg | otherwise = [pkg] - savingOldConfig db_name $ - writeNewConfig db_name new_config + let new_stack = (db_name,new_config) : rest_of_stack + new_broken = map package (brokenPackages (allPackagesInStack new_stack)) + newly_broken = filter (`notElem` map package old_broken) new_broken + + when (not (null newly_broken)) $ + dieOrForceAll force ("unregistering " ++ display pkgid ++ + " would break the following packages: " + ++ unwords (map display newly_broken)) + + writeNewConfig db_name new_config -- ----------------------------------------------------------------------------- -- Listing packages listPackages :: [Flag] -> Maybe PackageArg -> Maybe (String->Bool) -> IO () -listPackages flags mPackageName mModuleName = do - let simple_output = FlagSimpleOutput `elem` flags - db_stack <- getPkgDatabases False flags +listPackages my_flags mPackageName mModuleName = do + let simple_output = FlagSimpleOutput `elem` my_flags + db_stack <- getPkgDatabases False my_flags let db_stack_filtered -- if a package is given, filter out all other packages | Just this <- mPackageName = map (\(conf,pkgs) -> (conf, filter (this `matchesPkg`) pkgs)) @@ -553,9 +599,9 @@ listPackages flags mPackageName mModuleName = do EQ -> pkgVersion p1 `compare` pkgVersion p2 where (p1,p2) = (package pkg1, package pkg2) - match `exposedInPkg` pkg = any match (exposedModules pkg) + match `exposedInPkg` pkg = any match (map display $ exposedModules pkg) - pkg_map = map (\p -> (package p, p)) $ concatMap snd db_stack + pkg_map = allPackagesInStack db_stack show_func = if simple_output then show_simple else mapM_ (show_normal pkg_map) show_func (reverse db_stack_sorted) @@ -565,17 +611,18 @@ listPackages flags mPackageName mModuleName = do text db_name <> colon $$ nest 4 packages ) where packages = fsep (punctuate comma (map pp_pkg pkg_confs)) + broken = map package (brokenPackages pkg_map) pp_pkg p - | isBrokenPackage p pkg_map = braces doc + | package p `elem` broken = braces doc | exposed p = doc | otherwise = parens doc - where doc = text (showPackageId (package p)) + where doc = text (display (package p)) show_simple db_stack = do - let showPkg = if FlagNamesOnly `elem` flags then pkgName - else showPackageId + let showPkg = if FlagNamesOnly `elem` my_flags then display . pkgName + else display pkgs = map showPkg $ sortBy compPkgIdVer $ - map package (concatMap snd db_stack) + map package (allPackagesInStack db_stack) when (not (null pkgs)) $ hPutStrLn stdout $ concat $ intersperse " " pkgs @@ -583,32 +630,40 @@ listPackages flags mPackageName mModuleName = do -- Prints the highest (hidden or exposed) version of a package latestPackage :: [Flag] -> PackageIdentifier -> IO () -latestPackage flags pkgid = do - db_stack <- getPkgDatabases False flags +latestPackage my_flags pkgid = do + db_stack <- getPkgDatabases False my_flags ps <- findPackages db_stack (Id pkgid) show_pkg (sortBy compPkgIdVer (map package ps)) where show_pkg [] = die "no matches" - show_pkg pids = hPutStrLn stdout (showPackageId (last pids)) + show_pkg pids = hPutStrLn stdout (display (last pids)) -- ----------------------------------------------------------------------------- -- Describe describePackage :: [Flag] -> PackageArg -> IO () -describePackage flags pkgarg = do - db_stack <- getPkgDatabases False flags +describePackage my_flags pkgarg = do + db_stack <- getPkgDatabases False my_flags ps <- findPackages db_stack pkgarg - mapM_ (putStrLn . showInstalledPackageInfo) ps + doDump ps + +dumpPackages :: [Flag] -> IO () +dumpPackages my_flags = do + db_stack <- getPkgDatabases False my_flags + doDump (allPackagesInStack db_stack) + +doDump :: [InstalledPackageInfo] -> IO () +doDump = mapM_ putStrLn . intersperse "---" . map showInstalledPackageInfo -- PackageId is can have globVersion for the version findPackages :: PackageDBStack -> PackageArg -> IO [InstalledPackageInfo] findPackages db_stack pkgarg = case [ p | p <- all_pkgs, pkgarg `matchesPkg` p ] of - [] -> die ("cannot find package " ++ pkg_msg pkgarg) + [] -> dieWith 2 ("cannot find package " ++ pkg_msg pkgarg) ps -> return ps where - all_pkgs = concat (map snd db_stack) - pkg_msg (Id pkgid) = showPackageId pkgid + all_pkgs = allPackagesInStack db_stack + pkg_msg (Id pkgid) = display pkgid pkg_msg (Substring pkgpat _) = "matching "++pkgpat matches :: PackageIdentifier -> PackageIdentifier -> Bool @@ -618,7 +673,7 @@ pid `matches` pid' matchesPkg :: PackageArg -> InstalledPackageInfo -> Bool (Id pid) `matchesPkg` pkg = pid `matches` package pkg -(Substring _ m) `matchesPkg` pkg = m (showPackageId (package pkg)) +(Substring _ m) `matchesPkg` pkg = m (display (package pkg)) compPkgIdVer :: PackageIdentifier -> PackageIdentifier -> Ordering compPkgIdVer p1 p2 = pkgVersion p1 `compare` pkgVersion p2 @@ -627,8 +682,8 @@ compPkgIdVer p1 p2 = pkgVersion p1 `compare` pkgVersion p2 -- Field describeField :: [Flag] -> PackageArg -> [String] -> IO () -describeField flags pkgarg fields = do - db_stack <- getPkgDatabases False flags +describeField my_flags pkgarg fields = do + db_stack <- getPkgDatabases False my_flags fns <- toFields fields ps <- findPackages db_stack pkgarg let top_dir = takeDirectory (fst (last db_stack)) @@ -678,7 +733,7 @@ toField "hs_libraries" = Just $ strList . hsLibraries toField "extra_libraries" = Just $ strList . extraLibraries toField "include_dirs" = Just $ strList . includeDirs toField "c_includes" = Just $ strList . includes -toField "package_deps" = Just $ strList . map showPackageId. depends +toField "package_deps" = Just $ strList . map display. depends toField "extra_cc_opts" = Just $ strList . ccOptions toField "extra_ld_opts" = Just $ strList . ldOptions toField "framework_dirs" = Just $ strList . frameworkDirs @@ -693,90 +748,78 @@ strList = show -- Check: Check consistency of installed packages checkConsistency :: [Flag] -> IO () -checkConsistency flags = do - db_stack <- getPkgDatabases True flags +checkConsistency my_flags = do + db_stack <- getPkgDatabases True my_flags -- check behaves like modify for the purposes of deciding which -- databases to use, because ordering is important. - let pkgs = map (\p -> (package p, p)) $ concatMap snd db_stack - broken_pkgs = do - (pid, p) <- pkgs - let broken_deps = missingPackageDeps p pkgs - guard (not . null $ broken_deps) - return (pid, broken_deps) - mapM_ (putStrLn . render . show_func) broken_pkgs + let pkgs = allPackagesInStack db_stack + broken_pkgs = brokenPackages pkgs + broken_ids = map package broken_pkgs + broken_why = [ (package p, filter (`elem` broken_ids) (depends p)) + | p <- broken_pkgs ] + mapM_ (putStrLn . render . show_func) broken_why where - show_func | FlagSimpleOutput `elem` flags = show_simple + show_func | FlagSimpleOutput `elem` my_flags = show_simple | otherwise = show_normal show_simple (pid,deps) = - text (showPackageId pid) <> colon - <+> fsep (punctuate comma (map (text . showPackageId) deps)) + text (display pid) <> colon + <+> fsep (punctuate comma (map (text . display) deps)) show_normal (pid,deps) = - text "package" <+> text (showPackageId pid) <+> text "has missing dependencies:" - $$ nest 4 (fsep (punctuate comma (map (text . showPackageId) deps))) - -missingPackageDeps :: InstalledPackageInfo - -> [(PackageIdentifier, InstalledPackageInfo)] - -> [PackageIdentifier] -missingPackageDeps pkg pkg_map = - [ d | d <- depends pkg, isNothing (lookup d pkg_map)] ++ - [ d | d <- depends pkg, Just p <- return (lookup d pkg_map), - isBrokenPackage p pkg_map] - -isBrokenPackage :: InstalledPackageInfo -> [(PackageIdentifier, InstalledPackageInfo)] -> Bool -isBrokenPackage pkg pkg_map - = not . null $ missingPackageDeps pkg (filter notme pkg_map) - where notme (p,ipi) = package pkg /= p - -- remove p from the database when we invoke missingPackageDeps, - -- because we want mutually recursive groups of package to show up + text "package" <+> text (display pid) <+> text "has missing dependencies:" + $$ nest 4 (fsep (punctuate comma (map (text . display) deps))) + + +brokenPackages :: [InstalledPackageInfo] -> [InstalledPackageInfo] +brokenPackages pkgs = go [] pkgs + where + go avail not_avail = + case partition (depsAvailable avail) not_avail of + ([], not_avail) -> not_avail + (new_avail, not_avail) -> go (new_avail ++ avail) not_avail + + depsAvailable :: [InstalledPackageInfo] -> InstalledPackageInfo + -> Bool + depsAvailable pkgs_ok pkg = null dangling + where dangling = filter (`notElem` pids) (depends pkg) + pids = map package pkgs_ok + + -- we want mutually recursive groups of package to show up -- as broken. (#1750) -- ----------------------------------------------------------------------------- -- Manipulating package.conf files +type InstalledPackageInfoString = InstalledPackageInfo_ String + +convertPackageInfoOut :: InstalledPackageInfo -> InstalledPackageInfoString +convertPackageInfoOut + (pkgconf@(InstalledPackageInfo { exposedModules = e, + hiddenModules = h })) = + pkgconf{ exposedModules = map display e, + hiddenModules = map display h } + +convertPackageInfoIn :: InstalledPackageInfoString -> InstalledPackageInfo +convertPackageInfoIn + (pkgconf@(InstalledPackageInfo { exposedModules = e, + hiddenModules = h })) = + pkgconf{ exposedModules = map convert e, + hiddenModules = map convert h } + where convert = fromJust . simpleParse + writeNewConfig :: FilePath -> [InstalledPackageInfo] -> IO () writeNewConfig filename packages = do hPutStr stdout "Writing new package config file... " createDirectoryIfMissing True $ takeDirectory filename - h <- openFile filename WriteMode `catch` \e -> + let shown = concat $ intersperse ",\n " + $ map (show . convertPackageInfoOut) packages + fileContents = "[" ++ shown ++ "\n]" + writeFileAtomic filename fileContents + `catch` \e -> if isPermissionError e then die (filename ++ ": you don't have permission to modify this file") else ioError e - let shown = concat $ intersperse ",\n " $ map show packages - fileContents = "[" ++ shown ++ "\n]" - hPutStrLn h fileContents - hClose h hPutStrLn stdout "done." -savingOldConfig :: FilePath -> IO () -> IO () -savingOldConfig filename io = Exception.block $ do - hPutStr stdout "Saving old package config file... " - -- mv rather than cp because we've already done an hGetContents - -- on this file so we won't be able to open it for writing - -- unless we move the old one out of the way... - let oldFile = filename ++ ".old" - restore_on_error <- catch (renameFile filename oldFile >> return True) $ - \err -> do - unless (isDoesNotExistError err) $ do - hPutStrLn stderr (unwords ["Unable to rename", show filename, - "to", show oldFile]) - ioError err - return False - (do hPutStrLn stdout "done."; io) - `Exception.catch` \e -> do - hPutStr stdout ("WARNING: an error was encountered while writing " - ++ "the new configuration.\n") - -- remove any partially complete new version: - try (removeFile filename) - -- and attempt to restore the old one, if we had one: - when restore_on_error $ do - hPutStr stdout "Attempting to restore the old configuration... " - do renameFile oldFile filename - hPutStrLn stdout "done." - `catch` \err -> hPutStrLn stdout ("Failed: " ++ show err) - -- Note the above renameFile sometimes fails on Windows with - -- "permission denied", I have no idea why --SDM. - Exception.throwIO e - ----------------------------------------------------------------------------- -- Sanity-check a new package config, and automatically build GHCi libs -- if requested. @@ -805,8 +848,8 @@ validatePackageConfig pkg db_stack auto_ghci_libs update force = do -- we check that the package id can be parsed properly here. checkPackageId :: InstalledPackageInfo -> IO () checkPackageId ipi = - let str = showPackageId (package ipi) in - case [ x | (x,ys) <- readP_to_S parsePackageId str, all isSpace ys ] of + let str = display (package ipi) in + case [ x :: PackageIdentifier | (x,ys) <- readP_to_S parse str, all isSpace ys ] of [_] -> return () [] -> die ("invalid package identifier: " ++ str) _ -> die ("ambiguous package identifier: " ++ str) @@ -820,16 +863,16 @@ checkDuplicates db_stack pkg update force = do -- Check whether this package id already exists in this DB -- when (not update && (pkgid `elem` map package pkgs)) $ - die ("package " ++ showPackageId pkgid ++ " is already installed") + die ("package " ++ display pkgid ++ " is already installed") let - uncasep = map toLower . showPackageId + uncasep = map toLower . display dups = filter ((== uncasep pkgid) . uncasep) (map package pkgs) when (not update && not (null dups)) $ dieOrForceAll force $ "Package names may be treated case-insensitively in the future.\n"++ - "Package " ++ showPackageId pkgid ++ - " overlaps with: " ++ unwords (map showPackageId dups) + "Package " ++ display pkgid ++ + " overlaps with: " ++ unwords (map display dups) checkDir :: Force -> String -> IO () @@ -845,7 +888,7 @@ checkDir force d checkDep :: PackageDBStack -> Force -> PackageIdentifier -> IO () checkDep db_stack force pkgid | pkgid `elem` pkgids || (not real_version && name_exists) = return () - | otherwise = dieOrForceAll force ("dependency " ++ showPackageId pkgid + | otherwise = dieOrForceAll force ("dependency " ++ display pkgid ++ " doesn't exist") where -- for backwards compat, we treat 0.0 as a special version, @@ -855,7 +898,7 @@ checkDep db_stack force pkgid name_exists = any (\p -> pkgName (package p) == name) all_pkgs name = pkgName pkgid - all_pkgs = concat (map snd db_stack) + all_pkgs = allPackagesInStack db_stack pkgids = map package all_pkgs realVersion :: PackageIdentifier -> Bool @@ -948,7 +991,7 @@ okInModuleName c -- expanding environment variables in the package configuration expandEnvVars :: String -> Force -> IO String -expandEnvVars str force = go str "" +expandEnvVars str0 force = go str0 "" where go "" acc = return $! reverse acc go ('$':'{':str) acc | (var, '}':rest) <- break close str @@ -977,11 +1020,14 @@ bye :: String -> IO a bye s = putStr s >> exitWith ExitSuccess die :: String -> IO a -die s = do +die = dieWith 1 + +dieWith :: Int -> String -> IO a +dieWith ec s = do hFlush stdout prog <- getProgramName hPutStrLn stderr (prog ++ ": " ++ s) - exitWith (ExitFailure 1) + exitWith (ExitFailure ec) dieOrForceAll :: Force -> String -> IO () dieOrForceAll ForceAll s = ignoreError s @@ -999,8 +1045,8 @@ dieForcible :: String -> IO () dieForcible s = die (s ++ " (use --force to override)") my_head :: String -> [a] -> a -my_head s [] = error s -my_head s (x:xs) = x +my_head s [] = error s +my_head _ (x : _) = x ----------------------------------------- -- Cut and pasted from ghc/compiler/main/SysTools @@ -1067,3 +1113,70 @@ installSignalHandlers = do isInfixOf :: (Eq a) => [a] -> [a] -> Bool isInfixOf needle haystack = any (isPrefixOf needle) (tails haystack) #endif + +catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a +#if __GLASGOW_HASKELL__ >= 609 +catchIO = Exception.catch +#else +catchIO io handler = io `Exception.catch` handler' + where handler' (Exception.IOException ioe) = handler ioe + handler' e = Exception.throw e +#endif + +throwIOIO :: Exception.IOException -> IO a +#if __GLASGOW_HASKELL__ >= 609 +throwIOIO = Exception.throwIO +#else +throwIOIO ioe = Exception.throwIO (Exception.IOException ioe) +#endif + +catchError :: IO a -> (String -> IO a) -> IO a +#if __GLASGOW_HASKELL__ >= 609 +catchError io handler = io `Exception.catch` handler' + where handler' (Exception.ErrorCall err) = handler err +#else +catchError io handler = io `Exception.catch` handler' + where handler' (Exception.ErrorCall err) = handler err + handler' e = Exception.throw e +#endif + +onException :: IO a -> IO () -> IO a +#if __GLASGOW_HASKELL__ >= 609 +onException = Exception.onException +#else +onException io what = io `Exception.catch` \e -> do what + Exception.throw e +#endif + + +-- copied from Cabal's Distribution.Simple.Utils, except that we want +-- to use text files here, rather than binary files. +writeFileAtomic :: FilePath -> String -> IO () +writeFileAtomic targetFile content = do + (tmpFile, tmpHandle) <- openTempFile targetDir template + do hPutStr tmpHandle content + hClose tmpHandle +#if mingw32_HOST_OS || mingw32_TARGET_OS + renameFile tmpFile targetFile + -- If the targetFile exists then renameFile will fail + `catchIO` \err -> do + exists <- doesFileExist targetFile + if exists + then do removeFile targetFile + -- Big fat hairy race condition + renameFile tmpFile targetFile + -- If the removeFile succeeds and the renameFile fails + -- then we've lost the atomic property. + else throwIOIO err +#else + renameFile tmpFile targetFile +#endif + `onException` do hClose tmpHandle + removeFile tmpFile + where + template = targetName <.> "tmp" + targetDir | null targetDir_ = "." + | otherwise = targetDir_ + --TODO: remove this when takeDirectory/splitFileName is fixed + -- to always return a valid dir + (targetDir_,targetName) = splitFileName targetFile