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|
module XMonad.Prompt.MySsh
( -- * Usage
-- $usage
sshPrompt,
Ssh,
Override (..),
mkOverride,
Conn (..),
moshCmd,
moshCmd',
sshCmd,
inTmux,
withEnv
) where
import XMonad
import XMonad.Util.Run
import XMonad.Prompt
import System.Directory
import System.Environment
import qualified Control.Exception as E
import Control.Monad
import Data.Maybe
import Text.Parsec.String
import Text.Parsec
import Data.Char (isSpace)
econst :: Monad m => a -> E.IOException -> m a
econst = const . return
-- $usage
-- 1. In your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Prompt
-- > import XMonad.Prompt.Ssh
--
-- 2. In your keybindings add something like:
--
-- > , ((modm .|. controlMask, xK_s), sshPrompt defaultXPConfig)
--
-- Keep in mind, that if you want to use the completion you have to
-- disable the "HashKnownHosts" option in your ssh_config
--
-- For detailed instruction on editing the key binding see
-- "XMonad.Doc.Extending#Editing_key_bindings".
data Override = Override
{ oUser :: Maybe String
, oHost :: String
, oPort :: Maybe Int
, oCommand :: Conn -> String
}
mkOverride = Override { oUser = Nothing, oHost = "", oPort = Nothing, oCommand = sshCmd }
sshCmd c = concat
[ "ssh -t "
, if isJust $ cUser c then (fromJust $ cUser c) ++ "@" else ""
, cHost c
, if isJust $ cPort c then " -p " ++ (show $ fromJust $ cPort c) else ""
, " -- "
, cCommand c
]
moshCmd c = concat
[ "mosh "
, if isJust $ cUser c then (fromJust $ cUser c) ++ "@" else ""
, cHost c
, if isJust $ cPort c then " --ssh=\"ssh -p " ++ (show $ fromJust $ cPort c) ++ "\"" else ""
, " -- "
, cCommand c
]
moshCmd' p c = concat
[ "mosh "
, "--server=" ++ p ++ " "
, if isJust $ cUser c then (fromJust $ cUser c) ++ "@" else ""
, cHost c
, if isJust $ cPort c then " --ssh=\"ssh -p " ++ (show $ fromJust $ cPort c) ++ "\"" else ""
, " -- "
, cCommand c
]
inTmux c = c { cCommand = "tmux new-session \"" ++ (cCommand c) ++ "\"" }
withEnv :: [(String, String)] -> Conn -> Conn
withEnv envs c = c { cCommand = "env" ++ (concat $ map (\(n, v) -> ' ' : (n ++ "=" ++ v)) envs) ++ " " ++ (cCommand c) }
data Conn = Conn
{ cUser :: Maybe String
, cHost :: String
, cPort :: Maybe Int
, cCommand :: String
} deriving (Eq, Show, Read)
data Ssh = Ssh
instance XPrompt Ssh where
showXPrompt Ssh = "SSH to: "
commandToComplete _ c = c
nextCompletion _ = getNextCompletion
toConn :: String -> Maybe Conn
toConn = toConn' . parse connParser "(unknown)"
toConn' :: Either ParseError Conn -> Maybe Conn
toConn' (Left _) = Nothing
toConn' (Right a) = Just a
connParser :: Parser Conn
connParser = do
spaces
user' <- optionMaybe $ try $ do
str <- many1 $ satisfy (\c -> (not $ isSpace c) && (c /= '@'))
char '@'
return str
host' <- many1 $ satisfy (not . isSpace)
port' <- optionMaybe $ try $ do
space
string "-p"
spaces
int <- many1 digit
(space >> return ()) <|> eof
return $ (read int :: Int)
spaces
command' <- many anyChar
eof
return $ Conn
{ cHost = host'
, cUser = user'
, cPort = port'
, cCommand = command'
}
sshPrompt :: [Override] -> XPConfig -> X ()
sshPrompt o c = do
sc <- io sshComplList
mkXPrompt Ssh c (mkComplFunFromList sc) $ ssh o
ssh :: [Override] -> String -> X ()
ssh overrides str = do
let cmd = applyOverrides overrides str
--liftIO $ putStr "SSH Command: "
--liftIO $ putStrLn cmd
runInTerm "" cmd
applyOverrides :: [Override] -> String -> String
applyOverrides [] str = "ssh " ++ str
applyOverrides (o:os) str = case (applyOverride o str) of
Just str -> str
Nothing -> applyOverrides os str
applyOverride :: Override -> String -> Maybe String
applyOverride o str = let
conn = toConn str
in
if isNothing conn then Nothing else
case (fromJust conn) `matches` o of
True -> Just $ (oCommand o) (fromJust conn)
False -> Nothing
matches :: Conn -> Override -> Bool
a `matches` b = and
[ justBool (cUser a) (oUser b) (==)
, (cHost a) == (oHost b)
, justBool (cPort a) (oPort b) (==)
]
justBool :: Eq a => Maybe a -> Maybe a -> (a -> a -> Bool) -> Bool
justBool Nothing _ _ = True
justBool _ Nothing _ = True
justBool (Just a) (Just b) match = a `match` b
sshComplList :: IO [String]
sshComplList = uniqSort `fmap` liftM2 (++) sshComplListLocal sshComplListGlobal
sshComplListLocal :: IO [String]
sshComplListLocal = do
h <- getEnv "HOME"
s1 <- sshComplListFile $ h ++ "/.ssh/known_hosts"
s2 <- sshComplListConf $ h ++ "/.ssh/config"
return $ s1 ++ s2
sshComplListGlobal :: IO [String]
sshComplListGlobal = do
env <- getEnv "SSH_KNOWN_HOSTS" `E.catch` econst "/nonexistent"
fs <- mapM fileExists [ env
, "/usr/local/etc/ssh/ssh_known_hosts"
, "/usr/local/etc/ssh_known_hosts"
, "/etc/ssh/ssh_known_hosts"
, "/etc/ssh_known_hosts"
]
case catMaybes fs of
[] -> return []
(f:_) -> sshComplListFile' f
sshComplListFile :: String -> IO [String]
sshComplListFile kh = do
f <- doesFileExist kh
if f then sshComplListFile' kh
else return []
sshComplListFile' :: String -> IO [String]
sshComplListFile' kh = do
l <- readFile kh
return $ map (getWithPort . takeWhile (/= ',') . concat . take 1 . words)
$ filter nonComment
$ lines l
sshComplListConf :: String -> IO [String]
sshComplListConf kh = do
f <- doesFileExist kh
if f then sshComplListConf' kh
else return []
sshComplListConf' :: String -> IO [String]
sshComplListConf' kh = do
l <- readFile kh
return $ map (!!1)
$ filter isHost
$ map words
$ lines l
where
isHost ws = take 1 ws == ["Host"] && length ws > 1
fileExists :: String -> IO (Maybe String)
fileExists kh = do
f <- doesFileExist kh
if f then return $ Just kh
else return Nothing
nonComment :: String -> Bool
nonComment [] = False
nonComment ('#':_) = False
nonComment ('|':_) = False -- hashed, undecodeable
nonComment _ = True
getWithPort :: String -> String
getWithPort ('[':str) = host ++ " -p " ++ port
where (host,p) = break (==']') str
port = case p of
']':':':x -> x
_ -> "22"
getWithPort str = str
|
