65 lines
1.8 KiB
Haskell
65 lines
1.8 KiB
Haskell
{- git-annex-shell checks
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-
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- Copyright 2012 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module CmdLine.GitAnnexShell.Checks where
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import Annex.Common
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import Command
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import qualified Annex
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import Annex.Init
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import Utility.UserInfo
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import Utility.Env
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checkNotLimited :: IO ()
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checkNotLimited = checkEnv "GIT_ANNEX_SHELL_LIMITED"
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checkNotReadOnly :: IO ()
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checkNotReadOnly = checkEnv "GIT_ANNEX_SHELL_READONLY"
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checkEnv :: String -> IO ()
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checkEnv var = getEnv var >>= \case
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Nothing -> noop
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Just "" -> noop
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Just _ -> giveup $ "Action blocked by " ++ var
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checkDirectory :: Maybe FilePath -> IO ()
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checkDirectory mdir = do
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v <- getEnv "GIT_ANNEX_SHELL_DIRECTORY"
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case (v, mdir) of
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(Nothing, _) -> noop
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(Just d, Nothing) -> req d Nothing
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(Just d, Just dir)
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| d `equalFilePath` dir -> noop
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| otherwise -> do
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home <- myHomeDir
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d' <- canondir home d
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dir' <- canondir home dir
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if d' `equalFilePath` dir'
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then noop
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else req d' (Just dir')
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where
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req d mdir' = giveup $ unwords
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[ "Only allowed to access"
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, d
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, maybe "and could not determine directory from command line" ("not " ++) mdir'
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]
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{- A directory may start with ~/ or in some cases, even /~/,
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- or could just be relative to home, or of course could
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- be absolute. -}
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canondir home d
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| "~/" `isPrefixOf` d = return d
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| "/~/" `isPrefixOf` d = return $ drop 1 d
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| otherwise = relHome $ absPathFrom home d
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{- Modifies a Command to check that it is run in either a git-annex
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- repository, or a repository with a gcrypt-id set. -}
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gitAnnexShellCheck :: Command -> Command
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gitAnnexShellCheck = addCheck okforshell . dontCheck repoExists
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where
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okforshell = unlessM (isInitialized <||> isJust . gcryptId <$> Annex.getGitConfig) $
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giveup "Not a git-annex or gcrypt repository."
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