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-rw-r--r--apps/ListPath.hs27
-rw-r--r--windows-env.cabal1
2 files changed, 24 insertions, 4 deletions
diff --git a/apps/ListPath.hs b/apps/ListPath.hs
index ebc9188..65d374b 100644
--- a/apps/ListPath.hs
+++ b/apps/ListPath.hs
@@ -7,9 +7,12 @@
module Main (main) where
import Control.Monad (filterM)
+import Control.Monad.Trans.Class (lift)
+import Control.Monad.Trans.Except (runExceptT)
import Data.Maybe (fromMaybe)
import System.Directory (doesDirectoryExist)
import System.Environment (lookupEnv)
+import System.IO.Error (ioError)
import Options.Applicative
@@ -23,15 +26,20 @@ shouldListPath All = return . const True
shouldListPath ExistingOnly = doesDirectoryExist
shouldListPath MissingOnly = fmap not . doesDirectoryExist
+data Source = Environment | Registry Env.Profile
+ deriving (Eq, Show)
+
data Options = Options
{ optName :: Env.VarName
, optWhichPaths :: WhichPaths
+ , optSource :: Source
} deriving (Eq, Show)
optionParser :: Parser Options
optionParser = Options
<$> optNameDesc
<*> optWhichPathsDesc
+ <*> optSourceDesc
where
optNameDesc = strOption
$ long "name" <> short 'n'
@@ -42,6 +50,11 @@ optionParser = Options
<> help "List existing paths only")
<|> flag' MissingOnly (long "missing" <> short 'm'
<> help "List missing paths only")
+ optSourceDesc = pure Environment
+ <|> flag' (Registry Env.CurrentUser) (long "user" <> short 'u'
+ <> help "List current user's paths only")
+ <|> flag' (Registry Env.AllUsers) (long "global" <> short 'g'
+ <> help "List global (all users') paths only")
main :: IO ()
main = execParser parser >>= listPath
@@ -50,14 +63,20 @@ main = execParser parser >>= listPath
fullDesc <> progDesc "List directories in your PATH"
listPath :: Options -> IO ()
-listPath options = do
- oldValue <- query
- printPaths $ Env.pathSplit oldValue
+listPath options = runExceptT doListPath >>= either ioError return
where
varName = optName options
whichPaths = optWhichPaths options
+ source = optSource options
+
+ query = queryFrom source
+
+ queryFrom Environment = lift $ fromMaybe "" <$> lookupEnv varName
+ queryFrom (Registry profile) = Env.query profile varName
- query = fromMaybe "" <$> lookupEnv varName
+ doListPath = do
+ paths <- query
+ lift $ printPaths $ Env.pathSplit paths
printPaths paths =
filterM (shouldListPath whichPaths) paths >>= mapM_ putStrLn
diff --git a/windows-env.cabal b/windows-env.cabal
index 6209a1d..2a00ff5 100644
--- a/windows-env.cabal
+++ b/windows-env.cabal
@@ -44,6 +44,7 @@ executable paths
ghc-options: -Wall -Werror -threaded -rtsopts -with-rtsopts=-N
build-depends: base, directory
, optparse-applicative
+ , transformers
, windows-env
default-language: Haskell2010