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|
{- git-annex command line -}
module Commands (parseCmd) where
import System.Console.GetOpt
import Control.Monad.State (liftIO)
import System.Posix.Files
import System.Directory
import System.Path
import Data.String.Utils
import List
import IO
import qualified GitRepo as Git
import qualified Annex
import Utility
import Locations
import qualified Backend
import UUID
import LocationLog
import Types
import Core
import qualified Remotes
import qualified TypeInternals
data CmdWants = FilesInGit | FilesNotInGit | RepoName | SingleString
data Command = Command {
cmdname :: String,
cmdaction :: (String -> Annex ()),
cmdwants :: CmdWants,
cmddesc :: String
}
cmds :: [Command]
cmds = [
(Command "add" addCmd FilesNotInGit
"add files to annex")
, (Command "get" getCmd FilesInGit
"make content of annexed files available")
, (Command "drop" dropCmd FilesInGit
"indicate content of files not currently wanted")
, (Command "unannex" unannexCmd FilesInGit
"undo accidential add command")
, (Command "init" initCmd SingleString
"initialize git-annex with repository description")
, (Command "fix" fixCmd FilesInGit
"fix up files' symlinks to point to annexed content")
]
options = [
Option ['f'] ["force"] (NoArg Force) "allow actions that may lose annexed data"
]
header = "Usage: git-annex " ++ (join "|" $ map cmdname cmds) ++ " [path ...]"
usage = usageInfo header options ++ "\nSubcommands:\n" ++ cmddescs
where
cmddescs = unlines $ map (\c -> indent $ showcmd c) cmds
showcmd c =
(cmdname c) ++
(take (10 - (length (cmdname c))) $ repeat ' ') ++
(cmddesc c)
indent l = " " ++ l
{- Finds the type of parameters a command wants, from among the passed
- parameter list. -}
findWanted :: CmdWants -> [String] -> Git.Repo -> IO [String]
findWanted FilesNotInGit params repo = do
files <- mapM (Git.notInRepo repo) params
return $ foldl (++) [] files
findWanted FilesInGit params repo = do
files <- mapM (Git.inRepo repo) params
return $ foldl (++) [] files
findWanted SingleString params _ = do
return $ [unwords params]
findWanted RepoName params _ = do
return $ params
{- Parses command line and returns a list of flags and a list of
- actions to be run in the Annex monad. -}
parseCmd :: [String] -> AnnexState -> IO ([Flag], [Annex ()])
parseCmd argv state = do
(flags, params) <- getopt
case (length params) of
0 -> error usage
_ -> case (lookupCmd (params !! 0)) of
[] -> error usage
[Command _ action want _] -> do
f <- findWanted want (drop 1 params)
(TypeInternals.repo state)
return (flags, map action $ filter notstate f)
where
-- never include files from the state directory
notstate f = stateLoc /= take (length stateLoc) f
getopt = case getOpt Permute options argv of
(flags, params, []) -> return (flags, params)
(_, _, errs) -> ioError (userError (concat errs ++ usage))
lookupCmd cmd = filter (\c -> cmd == cmdname c) cmds
{- Annexes a file, storing it in a backend, and then moving it into
- the annex directory and setting up the symlink pointing to its content. -}
addCmd :: FilePath -> Annex ()
addCmd file = inBackend file $ do
s <- liftIO $ getSymbolicLinkStatus file
if ((isSymbolicLink s) || (not $ isRegularFile s))
then return ()
else do
showStart "add" file
g <- Annex.gitRepo
stored <- Backend.storeFileKey file
case (stored) of
Nothing -> showEndFail
Just (key, backend) -> do
logStatus key ValuePresent
setup g key
where
setup g key = do
let dest = annexLocation g key
liftIO $ createDirectoryIfMissing True (parentDir dest)
liftIO $ renameFile file dest
link <- calcGitLink file key
liftIO $ createSymbolicLink link file
liftIO $ Git.run g ["add", file]
showEndOk
{- Undo addCmd. -}
unannexCmd :: FilePath -> Annex ()
unannexCmd file = notinBackend file $ \(key, backend) -> do
showStart "unannex" file
Annex.flagChange Force True -- force backend to always remove
Backend.removeKey backend key
logStatus key ValueMissing
g <- Annex.gitRepo
let src = annexLocation g key
moveout g src
where
moveout g src = do
liftIO $ removeFile file
liftIO $ Git.run g ["rm", "--quiet", file]
-- git rm deletes empty directories;
-- put them back
liftIO $ createDirectoryIfMissing True (parentDir file)
liftIO $ renameFile src file
showEndOk
{- Gets an annexed file from one of the backends. -}
getCmd :: FilePath -> Annex ()
getCmd file = notinBackend file $ \(key, backend) -> do
inannex <- inAnnex key
if (inannex)
then return ()
else do
showStart "get" file
g <- Annex.gitRepo
let dest = annexLocation g key
let tmp = (annexTmpLocation g) ++ (keyFile key)
liftIO $ createDirectoryIfMissing True (parentDir tmp)
success <- Backend.retrieveKeyFile backend key tmp
if (success)
then do
liftIO $ renameFile tmp dest
logStatus key ValuePresent
showEndOk
else do
showEndFail
{- Indicates a file's content is not wanted anymore, and should be removed
- if it's safe to do so. -}
dropCmd :: FilePath -> Annex ()
dropCmd file = notinBackend file $ \(key, backend) -> do
inbackend <- Backend.hasKey key
if (not inbackend)
then return () -- no-op
else do
showStart "drop" file
success <- Backend.removeKey backend key
if (success)
then do
cleanup key
showEndOk
else showEndFail
where
cleanup key = do
logStatus key ValueMissing
inannex <- inAnnex key
if (inannex)
then do
g <- Annex.gitRepo
let loc = annexLocation g key
liftIO $ removeFile loc
return ()
else return ()
{- Fixes the symlink to an annexed file. -}
fixCmd :: String -> Annex ()
fixCmd file = notinBackend file $ \(key, backend) -> do
link <- calcGitLink file key
l <- liftIO $ readSymbolicLink file
if (link == l)
then return ()
else do
showStart "fix" file
liftIO $ createDirectoryIfMissing True (parentDir file)
liftIO $ removeFile file
liftIO $ createSymbolicLink link file
g <- Annex.gitRepo
liftIO $ Git.run g ["add", file]
showEndOk
{- Stores description for the repository. -}
initCmd :: String -> Annex ()
initCmd description = do
if (0 == length description)
then error $
"please specify a description of this repository\n" ++
usage
else do
g <- Annex.gitRepo
u <- getUUID g
describeUUID u description
log <- uuidLog
liftIO $ Git.run g ["add", log]
liftIO $ Git.run g ["commit", "-m", "git annex init", log]
liftIO $ putStrLn "description set"
-- helpers
inBackend file a = do
r <- Backend.lookupFile file
case (r) of
Just v -> return ()
Nothing -> a
notinBackend file a = do
r <- Backend.lookupFile file
case (r) of
Just v -> a v
Nothing -> return ()
|
