gkleen@sif: import

1 files changed, 94 insertions, 0 deletions

diff --git a/accounts/gkleen@sif/xmonad/lib/XMonad/Prompt/MyPass.hs b/accounts/gkleen@sif/xmonad/lib/XMonad/Prompt/MyPass.hs
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+++ b/accounts/gkleen@sif/xmonad/lib/XMonad/Prompt/MyPass.hs
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+module XMonad.Prompt.MyPass
+  (
+    -- * Usages
+    -- $usages
+    mkPassPrompt
+  ) where
+
+import Control.Monad (liftM)
+import XMonad.Core
+import XMonad.Prompt ( XPrompt
+                     , showXPrompt
+                     , commandToComplete
+                     , nextCompletion
+                     , getNextCompletion
+                     , XPConfig
+                     , mkXPrompt
+                     , searchPredicate)
+import System.Directory (getHomeDirectory)
+import System.FilePath (takeExtension, dropExtension, combine)
+import System.Posix.Env (getEnv)
+import XMonad.Util.Run (runProcessWithInput)
+
+-- $usages
+-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
+--
+-- > import XMonad.Prompt.Pass
+--
+-- Then add a keybinding for 'passPrompt', 'passGeneratePrompt' or 'passRemovePrompt':
+--
+-- >   , ((modMask x , xK_p)                              , passPrompt xpconfig)
+-- >   , ((modMask x .|. controlMask, xK_p)               , passGeneratePrompt xpconfig)
+-- >   , ((modMask x .|. controlMask  .|. shiftMask, xK_p), passRemovePrompt xpconfig)
+--
+-- For detailed instructions on:
+--
+-- - editing your key bindings, see "XMonad.Doc.Extending#Editing_key_bindings".
+--
+-- - how to setup the password storage, see <http://git.zx2c4.com/password-store/about/>
+--
+
+type Predicate = String -> String -> Bool
+
+getPassCompl :: [String] -> Predicate -> String -> IO [String]
+getPassCompl compls p s
+  | length s <= minL
+  , all ((> minL) . length) compls = return []
+  | otherwise = do return $ filter (p s) compls
+  where
+    minL = 3
+
+type PromptLabel = String
+
+data Pass = Pass PromptLabel
+
+instance XPrompt Pass where
+  showXPrompt       (Pass prompt) = prompt ++ ": "
+  commandToComplete _ c           = c
+  nextCompletion      _           = getNextCompletion
+
+-- | Default password store folder in $HOME/.password-store
+--
+passwordStoreFolderDefault :: String -> String
+passwordStoreFolderDefault home = combine home ".password-store"
+
+-- | Compute the password store's location.
+-- Use the PASSWORD_STORE_DIR environment variable to set the password store.
+-- If empty, return the password store located in user's home.
+--
+passwordStoreFolder :: IO String
+passwordStoreFolder =
+  getEnv "PASSWORD_STORE_DIR" >>= computePasswordStoreDir
+  where computePasswordStoreDir Nothing         = liftM passwordStoreFolderDefault getHomeDirectory
+        computePasswordStoreDir (Just storeDir) = return storeDir
+
+-- | A pass prompt factory
+--
+mkPassPrompt :: PromptLabel -> (String -> X ()) -> XPConfig -> X ()
+mkPassPrompt promptLabel passwordFunction xpconfig = do
+  passwords <- io (passwordStoreFolder >>= getPasswords)
+  mkXPrompt (Pass promptLabel) xpconfig (getPassCompl passwords $ searchPredicate xpconfig) passwordFunction
+
+-- | Retrieve the list of passwords from the password storage 'passwordStoreDir
+getPasswords :: FilePath -> IO [String]
+getPasswords passwordStoreDir = do
+  files <- runProcessWithInput "find" [
+    passwordStoreDir,
+    "-type", "f",
+    "-name", "*.gpg",
+    "-printf", "%P\n"] []
+  return $ map removeGpgExtension $ lines files
+
+removeGpgExtension :: String -> String
+removeGpgExtension file | takeExtension file == ".gpg" = dropExtension file
+                        | otherwise                    = file