module Stack.PackageIndex
( updateAllIndices
, getPackageCaches
, getPackageCachesIO
, getPackageVersions
, getPackageVersionsIO
, lookupPackageVersions
) where
import qualified Codec.Archive.Tar as Tar
import Control.Exception (Exception)
import Control.Exception.Safe (tryIO)
import Control.Monad (unless, when, liftM, void)
import Control.Monad.Catch (throwM)
import qualified Control.Monad.Catch as C
import Control.Monad.IO.Class (MonadIO, liftIO)
import Control.Monad.Logger (logDebug, logInfo, logWarn, logError)
import Control.Monad.Reader (asks)
import Control.Monad.Trans.Control
import Data.Aeson.Extended
import qualified Data.ByteString.Lazy as L
import Data.Conduit (($$), (=$))
import Data.Conduit.Binary (sinkHandle, sourceHandle)
import Data.Conduit.Zlib (ungzip)
import Data.Foldable (forM_)
import Data.IORef
import Data.Int (Int64)
import Data.Map (Map)
import qualified Data.Map.Strict as Map
import Data.Monoid
import Data.Set (Set)
import qualified Data.Set as Set
import Data.Store.Version
import Data.Store.VersionTagged
import Data.Streaming.Process (ProcessExitedUnsuccessfully(..))
import Data.Text (Text)
import qualified Data.Text as T
import Data.Text.Unsafe (unsafeTail)
import Data.Traversable (forM)
import Data.Typeable (Typeable)
import Network.HTTP.Download
import Path (mkRelDir, mkRelFile, parent, parseRelDir, toFilePath, parseAbsFile, (</>))
import Path.IO
import Prelude
import Stack.Types.Config
import Stack.Types.PackageIdentifier
import Stack.Types.PackageIndex
import Stack.Types.PackageName
import Stack.Types.StackT
import Stack.Types.Version
import System.FilePath (takeBaseName, (<.>))
import System.IO (IOMode (ReadMode, WriteMode), withBinaryFile)
import System.Process.Read (EnvOverride, ReadProcessException(..), doesExecutableExist, readProcessNull, tryProcessStdout)
import System.Process.Run (Cmd(..), callProcessInheritStderrStdout)
import System.Exit (exitFailure)
populateCache
:: (StackMiniM env m, HasConfig env)
=> EnvOverride
-> PackageIndex
-> m (Map PackageIdentifier PackageCache)
populateCache menv index = do
requireIndex menv index
path <- configPackageIndex (indexName index)
let loadPIS = do
$logSticky "Populating index cache ..."
lbs <- liftIO $ L.readFile $ Path.toFilePath path
loop 0 Map.empty (Tar.read lbs)
pis <- loadPIS `C.catch` \e -> do
$logWarn $ "Exception encountered when parsing index tarball: "
<> T.pack (show (e :: Tar.FormatError))
$logWarn "Automatically updating index and trying again"
updateIndex menv index
loadPIS
when (indexRequireHashes index) $ forM_ (Map.toList pis) $ \(ident, pc) ->
case pcDownload pc of
Just _ -> return ()
Nothing -> throwM $ MissingRequiredHashes (indexName index) ident
$logStickyDone "Populated index cache."
return pis
where
loop !blockNo !m (Tar.Next e es) =
loop (blockNo + entrySizeInBlocks e) (goE blockNo m e) es
loop _ m Tar.Done = return m
loop _ _ (Tar.Fail e) = throwM e
goE blockNo m e =
case Tar.entryContent e of
Tar.NormalFile lbs size ->
case parseNameVersion $ Tar.entryPath e of
Just (ident, ".cabal") -> addCabal ident size
Just (ident, ".json") -> addJSON ident lbs
_ -> m
_ -> m
where
addCabal ident size = Map.insertWith
(\_ pcOld -> pcNew { pcDownload = pcDownload pcOld })
ident
pcNew
m
where
pcNew = PackageCache
{ pcOffset = (blockNo + 1) * 512
, pcSize = size
, pcDownload = Nothing
}
addJSON ident lbs =
case decode lbs of
Nothing -> m
Just !pd -> Map.insertWith
(\_ pc -> pc { pcDownload = Just pd })
ident
PackageCache
{ pcOffset = 0
, pcSize = 0
, pcDownload = Just pd
}
m
breakSlash x
| T.null z = Nothing
| otherwise = Just (y, unsafeTail z)
where
(y, z) = T.break (== '/') x
parseNameVersion t1 = do
(p', t3) <- breakSlash
$ T.map (\c -> if c == '\\' then '/' else c)
$ T.pack t1
p <- parsePackageName p'
(v', t5) <- breakSlash t3
v <- parseVersion v'
let (t6, suffix) = T.break (== '.') t5
if t6 == p'
then return (PackageIdentifier p v, suffix)
else Nothing
data PackageIndexException
= GitNotAvailable IndexName
| MissingRequiredHashes IndexName PackageIdentifier
deriving Typeable
instance Exception PackageIndexException
instance Show PackageIndexException where
show (GitNotAvailable name) = concat
[ "Package index "
, T.unpack $ indexNameText name
, " only provides Git access, and you do not have"
, " the git executable on your PATH"
]
show (MissingRequiredHashes name ident) = concat
[ "Package index "
, T.unpack $ indexNameText name
, " is configured to require package hashes, but no"
, " hash is available for "
, packageIdentifierString ident
]
requireIndex :: (StackMiniM env m, HasConfig env)
=> EnvOverride -> PackageIndex -> m ()
requireIndex menv index = do
tarFile <- configPackageIndex $ indexName index
exists <- doesFileExist tarFile
unless exists $ updateIndex menv index
updateAllIndices :: (StackMiniM env m, HasConfig env)
=> EnvOverride -> m ()
updateAllIndices menv = do
clearPackageCaches
asks (configPackageIndices . getConfig) >>= mapM_ (updateIndex menv)
updateIndex :: (StackMiniM env m, HasConfig env)
=> EnvOverride -> PackageIndex -> m ()
updateIndex menv index =
do let name = indexName index
logUpdate mirror = $logSticky $ "Updating package index " <> indexNameText (indexName index) <> " (mirrored at " <> mirror <> ") ..."
git <- isGitInstalled menv
case (git, indexLocation index) of
(True, ILGit url) -> logUpdate url >> updateIndexGit menv name index url
(True, ILGitHttp url _) -> logUpdate url >> updateIndexGit menv name index url
(_, ILHttp url) -> logUpdate url >> updateIndexHTTP name index url
(False, ILGitHttp _ url) -> logUpdate url >> updateIndexHTTP name index url
(False, ILGit url) -> logUpdate url >> throwM (GitNotAvailable name)
updateIndexGit :: (StackMiniM env m, HasConfig env)
=> EnvOverride
-> IndexName
-> PackageIndex
-> Text
-> m ()
updateIndexGit menv indexName' index gitUrl = do
tarFile <- configPackageIndex indexName'
let idxPath = parent tarFile
ensureDir idxPath
do
repoName <- parseRelDir $ takeBaseName $ T.unpack gitUrl
let cloneArgs =
["clone"
,T.unpack gitUrl
,toFilePath repoName
,"-b"
,"display"]
sDir <- configPackageIndexRoot indexName'
let suDir =
sDir </>
$(mkRelDir "git-update")
acfDir = suDir </> repoName
repoExists <- doesDirExist acfDir
let doClone = readProcessNull (Just suDir) menv "git" cloneArgs
unless repoExists doClone
isShallow <- doesFileExist $ acfDir </> $(mkRelDir ".git") </> $(mkRelFile "shallow")
when isShallow $ do
$logWarn "Shallow package index repo detected, transitioning to a full clone..."
let handleUnshallowError =
C.handle $ \case
ProcessFailed{} -> do
$logInfo $ "Failed to convert to full clone, deleting and re-cloning."
ignoringAbsence (removeDirRecur acfDir)
doClone
err -> throwM err
handleUnshallowError $
readProcessNull (Just acfDir) menv "git"
["--git-dir=.git", "fetch", "--unshallow"]
$logSticky "Fetching package index ..."
let runFetch = callProcessInheritStderrStdout
(Cmd (Just acfDir) "git" menv ["--git-dir=.git","fetch","--tags"])
runFetch `C.catch` \(ex :: ProcessExitedUnsuccessfully) -> do
$logWarn (T.pack (show ex))
$logStickyDone "Failed to fetch package index, retrying."
removeDirRecur acfDir
readProcessNull (Just suDir) menv "git" cloneArgs
$logSticky "Fetching package index ..."
runFetch
$logStickyDone "Fetched package index."
when (indexGpgVerify index) $ do
result <- C.try $ readProcessNull (Just acfDir) menv "git" ["--git-dir=.git","tag","-v","current-hackage"]
case result of
Left ex -> do
$logError (T.pack (show ex))
case ex of
ProcessFailed{} -> $logError $ T.unlines
["Signature verification failed. "
,"Please ensure you've set up your"
,"GPG keychain to accept the D6CF60FD signing key."
,"For more information, see:"
,"https://github.com/fpco/stackage-update#readme"]
_ -> return ()
liftIO exitFailure
Right () -> return ()
tarId <- getTarCommitId (toFilePath tarFile)
cloneId <- getCloneCommitId acfDir
unless (tarId `equals` cloneId)
(generateArchive acfDir tarFile)
where
getTarCommitId fp =
tryProcessStdout Nothing menv "sh" ["-c","git get-tar-commit-id < "++fp]
getCloneCommitId dir =
tryProcessStdout (Just dir) menv "git" ["rev-parse","current-hackage^{}"]
equals (Right cid1) (Right cid2) = cid1 == cid2
equals _ _ = False
generateArchive acfDir tarFile = do
ignoringAbsence (removeFile tarFile)
deleteCache indexName'
$logDebug ("Exporting a tarball to " <> (T.pack . toFilePath) tarFile)
let tarFileTmp = toFilePath tarFile ++ ".tmp"
readProcessNull (Just acfDir) menv
"git" ["--git-dir=.git","archive","--format=tar","-o",tarFileTmp,"current-hackage"]
tarFileTmpPath <- parseAbsFile tarFileTmp
renameFile tarFileTmpPath tarFile
updateIndexHTTP :: (StackMiniM env m, HasConfig env)
=> IndexName
-> PackageIndex
-> Text
-> m ()
updateIndexHTTP indexName' index url = do
req <- parseRequest $ T.unpack url
$logInfo ("Downloading package index from " <> url)
gz <- configPackageIndexGz indexName'
tar <- configPackageIndex indexName'
wasDownloaded <- redownload req gz
toUnpack <-
if wasDownloaded
then return True
else not `liftM` doesFileExist tar
when toUnpack $ do
let tmp = toFilePath tar <.> "tmp"
tmpPath <- parseAbsFile tmp
deleteCache indexName'
liftIO $ do
withBinaryFile (toFilePath gz) ReadMode $ \input ->
withBinaryFile tmp WriteMode $ \output ->
sourceHandle input
$$ ungzip
=$ sinkHandle output
renameFile tmpPath tar
when (indexGpgVerify index)
$ $logWarn
$ "You have enabled GPG verification of the package index, " <>
"but GPG verification only works with Git downloading"
isGitInstalled :: MonadIO m
=> EnvOverride
-> m Bool
isGitInstalled = flip doesExecutableExist "git"
deleteCache
:: (StackMiniM env m, HasConfig env)
=> IndexName -> m ()
deleteCache indexName' = do
fp <- configPackageIndexCache indexName'
eres <- liftIO $ tryIO $ removeFile fp
case eres of
Left e -> $logDebug $ "Could not delete cache: " <> T.pack (show e)
Right () -> $logDebug $ "Deleted index cache at " <> T.pack (toFilePath fp)
getPackageVersionsIO
:: (StackMiniM env m, HasConfig env)
=> m (PackageName -> IO (Set Version))
getPackageVersionsIO = do
getCaches <- getPackageCachesIO
return $ \name ->
fmap (lookupPackageVersions name) getCaches
getPackageVersions
:: (StackMiniM env m, HasConfig env)
=> PackageName
-> m (Set Version)
getPackageVersions pkgName =
fmap (lookupPackageVersions pkgName) getPackageCaches
lookupPackageVersions :: PackageName -> Map PackageIdentifier a -> Set Version
lookupPackageVersions pkgName pkgCaches =
Set.fromList [v | PackageIdentifier n v <- Map.keys pkgCaches, n == pkgName]
getPackageCachesIO
:: (StackMiniM env m, HasConfig env)
=> m (IO (Map PackageIdentifier (PackageIndex, PackageCache)))
getPackageCachesIO = toIO getPackageCaches
where
toIO :: (MonadIO m, MonadBaseControl IO m) => m a -> m (IO a)
toIO m = do
runInBase <- liftBaseWith $ \run -> return (void . run)
return $ do
i <- newIORef (error "Impossible evaluation in toIO")
runInBase $ do
x <- m
liftIO $ writeIORef i x
readIORef i
getPackageCaches
:: (StackMiniM env m, HasConfig env)
=> m (Map PackageIdentifier (PackageIndex, PackageCache))
getPackageCaches = do
menv <- getMinimalEnvOverride
config <- askConfig
mcached <- liftIO $ readIORef (configPackageCaches config)
case mcached of
Just cached -> return cached
Nothing -> do
result <- liftM mconcat $ forM (configPackageIndices config) $ \index -> do
fp <- configPackageIndexCache (indexName index)
PackageCacheMap pis' <-
$(versionedDecodeOrLoad (storeVersionConfig "pkg-v1" "aHzcZ6_w3rL6NtEJUqEfh6fcjAc="
:: VersionConfig PackageCacheMap))
fp
(liftM PackageCacheMap (populateCache menv index))
return (fmap (index,) pis')
liftIO $ writeIORef (configPackageCaches config) (Just result)
return result
clearPackageCaches :: (StackMiniM env m, HasConfig env) => m ()
clearPackageCaches = do
cacheRef <- asks (configPackageCaches . getConfig)
liftIO $ writeIORef cacheRef Nothing
entrySizeInBlocks :: Tar.Entry -> Int64
entrySizeInBlocks entry = 1 + case Tar.entryContent entry of
Tar.NormalFile _ size -> bytesToBlocks size
Tar.OtherEntryType _ _ size -> bytesToBlocks size
_ -> 0
where
bytesToBlocks s = 1 + ((fromIntegral s 1) `div` 512)