add --version flag to executables

5 files changed, 46 insertions, 11 deletions

diff --git a/app/AddPath.hs b/app/AddPath.hs
index cf8aa7c..3e8bbd8 100644
--- a/app/AddPath.hs
+++ b/app/AddPath.hs
@@ -9,12 +9,14 @@ module Main (main) where
 
 import Control.Monad   (when, void)
 import Control.Monad.Trans.Except (catchE, runExceptT, throwE)
-import Data.Monoid     ((<>))
 import Data.List       (nub)
+import Data.Monoid     ((<>))
+import Data.Version    (showVersion)
 import System.IO.Error (ioError, isDoesNotExistError)
 
 import Options.Applicative
 
+import qualified Paths_windows_env as Meta
 import qualified WindowsEnv
 
 import Utils.Path
@@ -57,8 +59,13 @@ optionParser = Options
 main :: IO ()
 main = execParser parser >>= addPath
   where
-    parser = info (helper <*> optionParser) $
-        fullDesc <> progDesc "Add directories to your PATH"
+    parser = info (helper <*> versioner <*> optionParser)
+         $ fullDesc
+        <> progDesc "Add directories to your PATH"
+    versioner = infoOption (showVersion Meta.version)
+         $ long "version"
+        <> help "Show version"
+        <> hidden
 
 addPath :: Options -> IO ()
 addPath options = runExceptT doAddPath >>= either ioError return
diff --git a/app/ListPaths.hs b/app/ListPaths.hs
index e075f9f..b7d9c37 100644
--- a/app/ListPaths.hs
+++ b/app/ListPaths.hs
@@ -12,12 +12,14 @@ import Control.Monad.Trans.Class  (lift)
 import Control.Monad.Trans.Except (runExceptT)
 import Data.Maybe         (fromMaybe)
 import Data.Monoid        ((<>))
+import Data.Version       (showVersion)
 import System.Directory   (doesDirectoryExist)
 import System.Environment (lookupEnv)
 import System.IO.Error    (ioError)
 
 import Options.Applicative
 
+import qualified Paths_windows_env as Meta
 import qualified WindowsEnv
 
 import Utils.Path
@@ -63,8 +65,13 @@ optionParser = Options
 main :: IO ()
 main = execParser parser >>= listPaths
   where
-    parser = info (helper <*> optionParser) $
-        fullDesc <> progDesc "List directories in your PATH"
+    parser = info (helper <*> versioner <*> optionParser)
+         $ fullDesc
+        <> progDesc "List directories in your PATH"
+    versioner = infoOption (showVersion Meta.version)
+         $ long "version"
+        <> help "Show version"
+        <> hidden
 
 listPaths :: Options -> IO ()
 listPaths options = runExceptT doListPaths >>= either ioError return
diff --git a/app/RemovePath.hs b/app/RemovePath.hs
index ed29f3a..6954359 100644
--- a/app/RemovePath.hs
+++ b/app/RemovePath.hs
@@ -10,10 +10,12 @@ module Main (main) where
 import Control.Monad   (void, when)
 import Control.Monad.Trans.Except (catchE, runExceptT, throwE)
 import Data.Monoid     ((<>))
+import Data.Version    (showVersion)
 import System.IO.Error (ioError, isDoesNotExistError)
 
 import Options.Applicative
 
+import qualified Paths_windows_env as Meta
 import qualified WindowsEnv
 
 import Utils.Prompt
@@ -50,8 +52,13 @@ optionParser = Options
 main :: IO ()
 main = execParser parser >>= removePath
   where
-    parser = info (helper <*> optionParser) $
-        fullDesc <> progDesc "Remove directories from your PATH"
+    parser = info (helper <*> versioner <*> optionParser)
+         $ fullDesc
+        <> progDesc "Remove directories from your PATH"
+    versioner = infoOption (showVersion Meta.version)
+         $ long "version"
+        <> help "Show version"
+        <> hidden
 
 removePath :: Options -> IO ()
 removePath options = runExceptT doRemovePath >>= either ioError return
diff --git a/app/SetEnv.hs b/app/SetEnv.hs
index 6c941af..ac8fa93 100644
--- a/app/SetEnv.hs
+++ b/app/SetEnv.hs
@@ -10,10 +10,12 @@ module Main (main) where
 import Control.Monad   (void)
 import Control.Monad.Trans.Except (runExceptT)
 import Data.Monoid     ((<>))
+import Data.Version    (showVersion)
 import System.IO.Error (ioError)
 
 import Options.Applicative
 
+import qualified Paths_windows_env as Meta
 import qualified WindowsEnv
 
 import Utils.Prompt
@@ -49,8 +51,13 @@ optionParser = Options
 main :: IO ()
 main = execParser parser >>= setEnv
   where
-    parser = info (helper <*> optionParser) $
-        fullDesc <> progDesc "Define environment variables"
+    parser = info (helper <*> versioner <*> optionParser)
+         $ fullDesc
+        <> progDesc "Define environment variables"
+    versioner = infoOption (showVersion Meta.version)
+         $ long "version"
+        <> help "Show version"
+        <> hidden
 
 setEnv :: Options -> IO ()
 setEnv options = runExceptT doSetEnv >>= either ioError return
diff --git a/app/UnsetEnv.hs b/app/UnsetEnv.hs
index 5ab28d5..c1e904d 100644
--- a/app/UnsetEnv.hs
+++ b/app/UnsetEnv.hs
@@ -10,10 +10,12 @@ module Main (main) where
 import Control.Monad   (void)
 import Control.Monad.Trans.Except (runExceptT)
 import Data.Monoid     ((<>))
+import Data.Version    (showVersion)
 import System.IO.Error (ioError)
 
 import Options.Applicative
 
+import qualified Paths_windows_env as Meta
 import qualified WindowsEnv
 
 import Utils.Prompt
@@ -44,8 +46,13 @@ optionParser = Options
 main :: IO ()
 main = execParser parser >>= unsetEnv
   where
-    parser = info (helper <*> optionParser) $
-        fullDesc <> progDesc "Delete environment variables"
+    parser = info (helper <*> versioner <*> optionParser)
+         $ fullDesc
+        <> progDesc "Delete environment variables"
+    versioner = infoOption (showVersion Meta.version)
+         $ long "version"
+        <> help "Show version"
+        <> hidden
 
 unsetEnv :: Options -> IO ()
 unsetEnv options = runExceptT doUnsetEnv >>= either ioError return