73 lines
2.3 KiB
Haskell
73 lines
2.3 KiB
Haskell
{- git-annex remote access with ssh
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-
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- Copyright 2011,2012 Joey Hess <joey@kitenet.net>
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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 Remote.Helper.Ssh where
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import Common.Annex
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import qualified Git
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import qualified Git.Url
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import Annex.UUID
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import Annex.Ssh
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import Fields
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import Types.GitConfig
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{- Generates parameters to ssh to a repository's host and run a command.
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- Caller is responsible for doing any neccessary shellEscaping of the
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- passed command. -}
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sshToRepo :: Git.Repo -> [CommandParam] -> Annex [CommandParam]
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sshToRepo repo sshcmd = do
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g <- fromRepo id
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let c = extractRemoteGitConfig g (Git.repoDescribe repo)
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let opts = map Param $ remoteAnnexSshOptions c
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let host = Git.Url.hostuser repo
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params <- sshCachingOptions (host, Git.Url.port repo) opts
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return $ params ++ Param host : sshcmd
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{- Generates parameters to run a git-annex-shell command on a remote
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- repository. -}
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git_annex_shell :: Git.Repo -> String -> [CommandParam] -> [(Field, String)] -> Annex (Maybe (FilePath, [CommandParam]))
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git_annex_shell r command params fields
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| not $ Git.repoIsUrl r = return $ Just (shellcmd, shellopts ++ fieldopts)
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| Git.repoIsSsh r = do
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uuid <- getRepoUUID r
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sshparams <- sshToRepo r [Param $ sshcmd uuid ]
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return $ Just ("ssh", sshparams)
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| otherwise = return Nothing
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where
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dir = Git.repoPath r
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shellcmd = "git-annex-shell"
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shellopts = Param command : File dir : params
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sshcmd uuid = unwords $
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shellcmd : map shellEscape (toCommand shellopts) ++
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uuidcheck uuid ++
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map shellEscape (toCommand fieldopts)
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uuidcheck NoUUID = []
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uuidcheck (UUID u) = ["--uuid", u]
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fieldopts
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| null fields = []
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| otherwise = fieldsep : map fieldopt fields ++ [fieldsep]
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fieldsep = Param "--"
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fieldopt (field, value) = Param $
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fieldName field ++ "=" ++ value
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{- Uses a supplied function (such as boolSystem) to run a git-annex-shell
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- command on a remote.
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-
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- Or, if the remote does not support running remote commands, returns
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- a specified error value. -}
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onRemote
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:: Git.Repo
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-> (FilePath -> [CommandParam] -> IO a, a)
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-> String
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-> [CommandParam]
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-> [(Field, String)]
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-> Annex a
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onRemote r (with, errorval) command params fields = do
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s <- git_annex_shell r command params fields
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case s of
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Just (c, ps) -> liftIO $ with c ps
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Nothing -> return errorval
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