propellor/PrivData.hs

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module PrivData where
import qualified Data.Map as M
import Control.Applicative
import System.FilePath
import System.IO
import System.Directory
import Data.Maybe
import Control.Monad
import Types
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import Property
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import Utility.Monad
import Utility.PartialPrelude
import Utility.Exception
import Utility.Process
import Utility.Tmp
import Utility.SafeCommand
{- Note that removing or changing field names will break the
- serialized privdata files, so don't do that!
- It's fine to add new fields. -}
data PrivDataField
= DockerAuthentication
| SshPrivKey UserName
| Password UserName
deriving (Read, Show, Ord, Eq)
withPrivData :: PrivDataField -> (String -> IO Result) -> IO Result
withPrivData field a = maybe missing a =<< getPrivData field
where
missing = do
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warningMessage $ "Missing privdata " ++ show field
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return FailedChange
getPrivData :: PrivDataField -> IO (Maybe String)
getPrivData field = do
m <- catchDefaultIO Nothing $ readish <$> readFile privDataLocal
return $ maybe Nothing (M.lookup field) m
setPrivData :: HostName -> PrivDataField -> String -> IO ()
setPrivData host field value = do
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makePrivDataDir
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let f = privDataFile host
m <- fromMaybe M.empty . readish <$> gpgDecrypt f
let m' = M.insert field value m
gpgEncrypt f (show m')
void $ boolSystem "git" [Param "add", File f]
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makePrivDataDir :: IO ()
makePrivDataDir = createDirectoryIfMissing False privDataDir
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privDataDir :: FilePath
privDataDir = "privdata"
privDataFile :: HostName -> FilePath
privDataFile host = privDataDir </> host ++ ".gpg"
privDataLocal :: FilePath
privDataLocal = privDataDir </> "local"
privDataMarker :: String
privDataMarker = "PRIVDATA "
gpgDecrypt :: FilePath -> IO String
gpgDecrypt f = ifM (doesFileExist f)
( readProcess "gpg" ["--decrypt", f]
, return ""
)
gpgEncrypt :: FilePath -> String -> IO ()
gpgEncrypt f s = do
encrypted <- writeReadProcessEnv "gpg"
[ "--default-recipient-self"
, "--armor"
, "--encrypt"
]
Nothing
(Just $ flip hPutStr s)
Nothing
viaTmp writeFile f encrypted