40ecf58d4bThis does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
72 lines
2.1 KiB
Haskell
72 lines
2.1 KiB
Haskell
{- GIT_SSH and GIT_SSH_COMMAND support
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-
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- Copyright 2017 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Git.Ssh (module Git.Ssh, module Utility.SshHost) where
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import Common
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import Utility.Env
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import Utility.SshHost
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import Data.Char
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gitSshEnv :: String
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gitSshEnv = "GIT_SSH"
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gitSshCommandEnv :: String
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gitSshCommandEnv = "GIT_SSH_COMMAND"
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gitSshEnvSet :: IO Bool
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gitSshEnvSet = anyM (isJust <$$> getEnv) [gitSshEnv, gitSshCommandEnv]
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type SshPort = Integer
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-- Command to run on the remote host. It is run by the shell
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-- there, so any necessary shell escaping of parameters in it should
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-- already be done.
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type SshCommand = String
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-- | Checks for GIT_SSH and GIT_SSH_COMMAND and if set, returns
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-- a command and parameters to run to ssh.
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gitSsh :: SshHost -> Maybe SshPort -> SshCommand -> IO (Maybe (FilePath, [CommandParam]))
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gitSsh host mp cmd = gitSsh' host mp cmd []
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gitSsh' :: SshHost -> Maybe SshPort -> SshCommand -> [CommandParam] -> IO (Maybe (FilePath, [CommandParam]))
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gitSsh' host mp cmd extrasshparams = do
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gsc <- getEnv gitSshCommandEnv
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case gsc of
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Just c
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-- git only runs the command with the shell
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-- when it contains spaces; otherwise it's
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-- treated the same as GIT_SSH
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| any isSpace c -> ret "sh"
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[ Param "-c"
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, Param (shellcmd c sshps)
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]
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| otherwise -> ret c sshps
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Nothing -> do
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gs <- getEnv gitSshEnv
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case gs of
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Just c -> ret c sshps
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Nothing -> return Nothing
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where
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ret c l = return $ Just (c, l)
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-- Git passes exactly these parameters to the ssh command.
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gitps = map Param $ case mp of
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Nothing -> [fromSshHost host, cmd]
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Just p -> [fromSshHost host, "-p", show p, cmd]
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-- Passing any extra parameters to the ssh command may
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-- break some commands.
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sshps = extrasshparams ++ gitps
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-- The shell command to run with sh -c is constructed
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-- this way, rather than using "$@" because there could be some
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-- unwanted parameters passed to the command, and this way they
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-- are ignored. For example, when Utility.Rsync.rsyncShell is
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-- used, rsync adds some parameters after the command.
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shellcmd c ps = c ++ " " ++ unwords (map shellEscape (toCommand ps))
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