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authorGravatar Joey Hess <joey@kitenet.net>2012-01-10 15:29:10 -0400
committerGravatar Joey Hess <joey@kitenet.net>2012-01-10 15:29:10 -0400
commit16e7178f207b0472346c06f30aa210cebe373c36 (patch)
tree1d9f91d5ef3f5a72adf4e0df0b38d362649a2200 /Annex/Ssh.hs
parent07cacbeee95b377e1bf4111e4d4b30190956c585 (diff)
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-{- git-annex remote access with ssh
- -
- - Copyright 2011 Joey Hess <joey@kitenet.net>
- -
- - Licensed under the GNU GPL version 3 or higher.
- -}
-
-module Annex.Ssh where
-
-import Common
-import qualified Git
-import qualified Git.Url
-import Types
-import Config
-import Annex.UUID
-
-{- Generates parameters to ssh to a repository's host and run a command.
- - Caller is responsible for doing any neccessary shellEscaping of the
- - passed command. -}
-sshToRepo :: Git.Repo -> [CommandParam] -> Annex [CommandParam]
-sshToRepo repo sshcmd = do
- s <- getConfig repo "ssh-options" ""
- let sshoptions = map Param (words s)
- let sshport = case Git.Url.port repo of
- Nothing -> []
- Just p -> [Param "-p", Param (show p)]
- let sshhost = Param $ Git.Url.hostuser repo
- return $ sshoptions ++ sshport ++ [sshhost] ++ sshcmd
-
-{- Generates parameters to run a git-annex-shell command on a remote
- - repository. -}
-git_annex_shell :: Git.Repo -> String -> [CommandParam] -> Annex (Maybe (FilePath, [CommandParam]))
-git_annex_shell r command params
- | not $ Git.repoIsUrl r = return $ Just (shellcmd, shellopts)
- | Git.repoIsSsh r = do
- uuid <- getRepoUUID r
- sshparams <- sshToRepo r [Param $ sshcmd uuid ]
- return $ Just ("ssh", sshparams)
- | otherwise = return Nothing
- where
- dir = Git.workTree r
- shellcmd = "git-annex-shell"
- shellopts = Param command : File dir : params
- sshcmd uuid = unwords $
- shellcmd : map shellEscape (toCommand shellopts) ++
- uuidcheck uuid
- uuidcheck NoUUID = []
- uuidcheck (UUID u) = ["--uuid", u]
-
-{- Uses a supplied function (such as boolSystem) to run a git-annex-shell
- - command on a remote.
- -
- - Or, if the remote does not support running remote commands, returns
- - a specified error value. -}
-onRemote
- :: Git.Repo
- -> (FilePath -> [CommandParam] -> IO a, a)
- -> String
- -> [CommandParam]
- -> Annex a
-onRemote r (with, errorval) command params = do
- s <- git_annex_shell r command params
- case s of
- Just (c, ps) -> liftIO $ with c ps
- Nothing -> return errorval