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-rw-r--r--src/Environment.hs61
-rw-r--r--src/Registry.hs133
-rw-r--r--src/Utils.hs24
3 files changed, 112 insertions, 106 deletions
diff --git a/src/Environment.hs b/src/Environment.hs
index 0690278..2b53258 100644
--- a/src/Environment.hs
+++ b/src/Environment.hs
@@ -4,29 +4,32 @@
- See LICENSE.txt for details.
-}
-module Environment ( saveToRegistry
- , saveToRegistryWithPrompt
- , queryFromRegistry
- , wipeFromRegistry
- , wipeFromRegistryWithPrompt
- , getEnv
- , splitPaths
- , joinPaths
- , RegistryBasedEnvironment(..) ) where
-
-import Control.Monad ( liftM, when )
-import Data.List ( intercalate )
-import Data.List.Split ( splitOn )
-import Data.Maybe ( fromMaybe )
-import qualified System.Environment ( lookupEnv )
-import System.IO.Error ( catchIOError, isDoesNotExistError )
+module Environment
+ ( saveToRegistry
+ , saveToRegistryWithPrompt
+ , queryFromRegistry
+ , wipeFromRegistry
+ , wipeFromRegistryWithPrompt
+ , getEnv
+ , splitPaths
+ , joinPaths
+ , RegistryBasedEnvironment(..)
+ ) where
+
+import Control.Monad (liftM, when)
+import Data.List (intercalate)
+import Data.List.Split (splitOn)
+import Data.Maybe (fromMaybe)
+import qualified System.Environment (lookupEnv)
+import System.IO.Error (catchIOError, isDoesNotExistError)
import qualified Registry
-import qualified Utils ( promptToContinue )
+import qualified Utils (promptToContinue)
-data RegistryBasedEnvironment = CurrentUserEnvironment
- | AllUsersEnvironment
- deriving (Eq, Show)
+data RegistryBasedEnvironment
+ = CurrentUserEnvironment
+ | AllUsersEnvironment
+ deriving (Eq, Show)
registrySubKeyPath :: RegistryBasedEnvironment -> String
registrySubKeyPath CurrentUserEnvironment = "Environment"
@@ -45,12 +48,12 @@ saveToRegistry env = Registry.setString (registryKey env) (registrySubKeyPath en
saveToRegistryWithPrompt :: RegistryBasedEnvironment -> String -> String -> IO ()
saveToRegistryWithPrompt env name value = do
- putStrLn $ "Saving variable '" ++ name ++ "' to '" ++ registryKeyPath env ++ "'..."
- oldValue <- queryFromRegistry env name
- putStrLn $ "\tOld value: " ++ oldValue
- putStrLn $ "\tNew value: " ++ value
- agreed <- Utils.promptToContinue
- when agreed $ saveToRegistry env name value
+ putStrLn $ "Saving variable '" ++ name ++ "' to '" ++ registryKeyPath env ++ "'..."
+ oldValue <- queryFromRegistry env name
+ putStrLn $ "\tOld value: " ++ oldValue
+ putStrLn $ "\tNew value: " ++ value
+ agreed <- Utils.promptToContinue
+ when agreed $ saveToRegistry env name value
queryFromRegistry :: RegistryBasedEnvironment -> String -> IO String
queryFromRegistry env name = catchIOError (Registry.getString (registryKey env) (registrySubKeyPath env) name) emptyIfDoesNotExist
@@ -66,9 +69,9 @@ wipeFromRegistry env name = catchIOError (Registry.delValue (registryKey env) (r
wipeFromRegistryWithPrompt :: RegistryBasedEnvironment -> String -> IO ()
wipeFromRegistryWithPrompt env name = do
- putStrLn $ "Deleting variable '" ++ name ++ "' from '" ++ registryKeyPath env ++ "'..."
- agreed <- Utils.promptToContinue
- when agreed $ wipeFromRegistry env name
+ putStrLn $ "Deleting variable '" ++ name ++ "' from '" ++ registryKeyPath env ++ "'..."
+ agreed <- Utils.promptToContinue
+ when agreed $ wipeFromRegistry env name
getEnv :: String -> IO String
getEnv = liftM (fromMaybe "") . System.Environment.lookupEnv
diff --git a/src/Registry.hs b/src/Registry.hs
index d6c3f26..a38ef00 100644
--- a/src/Registry.hs
+++ b/src/Registry.hs
@@ -4,21 +4,24 @@
- See LICENSE.txt for details.
-}
-module Registry ( delValue
- , getString
- , hkcu
- , hklm
- , setString
- , KeyHandle ) where
+module Registry
+ ( KeyHandle
+ , delValue
+ , getString
+ , setString
+ , hkcu
+ , hklm
+ ) where
+
+import Control.Exception (bracket)
+import Data.Maybe (fromMaybe)
+import Foreign.ForeignPtr (withForeignPtr)
+import Foreign.Marshal.Alloc (alloca, allocaBytes)
+import Foreign.Ptr (castPtr, plusPtr)
+import Foreign.Storable (peek, poke, sizeOf)
+import Graphics.Win32.Window (sendMessage)
+import System.IO.Error (mkIOError, doesNotExistErrorType)
-import Control.Exception ( bracket )
-import Data.Maybe ( fromMaybe )
-import Foreign.ForeignPtr ( withForeignPtr )
-import Foreign.Marshal.Alloc ( alloca, allocaBytes )
-import Foreign.Ptr ( castPtr, plusPtr )
-import Foreign.Storable ( peek, poke, sizeOf )
-import Graphics.Win32.Window ( sendMessage )
-import System.IO.Error ( mkIOError, doesNotExistErrorType )
import System.Win32.Types
import System.Win32.Registry
@@ -26,69 +29,69 @@ newtype KeyHandle = KeyHandle HKEY
getType :: HKEY -> String -> String -> IO (Maybe RegValueType)
getType key subKeyPath valueName =
- bracket (regOpenKey key subKeyPath) regCloseKey $ \hKey ->
- withForeignPtr hKey $ \p_key ->
- withTString valueName $ \p_valueName ->
- alloca $ \p_type -> do
- ret <- c_RegQueryValueEx p_key p_valueName nullPtr p_type nullPtr nullPtr
- case ret of
- 0x0 -> do
- type_ <- peek p_type
- return $ Just type_
- 0x2 -> return Nothing
- _ -> failWith "RegQueryValueEx" ret
+ bracket (regOpenKey key subKeyPath) regCloseKey $ \hKey ->
+ withForeignPtr hKey $ \p_key ->
+ withTString valueName $ \p_valueName ->
+ alloca $ \p_type -> do
+ ret <- c_RegQueryValueEx p_key p_valueName nullPtr p_type nullPtr nullPtr
+ case ret of
+ 0x0 -> do
+ type_ <- peek p_type
+ return $ Just type_
+ 0x2 -> return Nothing
+ _ -> failWith "RegQueryValueEx" ret
getString :: KeyHandle -> String -> String -> IO String
getString (KeyHandle hKey) subKeyPath valueName =
- bracket (regOpenKey hKey subKeyPath) regCloseKey $ \hSubKey ->
- withForeignPtr hSubKey $ \p_key ->
- withTString valueName $ \p_valueName ->
- alloca $ \dataSizePtr -> do
- poke dataSizePtr 0
- ret <- c_RegQueryValueEx p_key p_valueName nullPtr nullPtr nullPtr dataSizePtr
- case ret of
- 0x0 -> do
- dataSize <- peek dataSizePtr
- let newDataSize = dataSize + fromIntegral (sizeOf (undefined :: TCHAR))
- poke dataSizePtr newDataSize
- allocaBytes (fromIntegral newDataSize) $ \dataPtr -> do
- poke (castPtr $ plusPtr dataPtr $ fromIntegral dataSize) '\0'
- failUnlessSuccess "RegQueryValueEx" $
- c_RegQueryValueEx p_key p_valueName nullPtr nullPtr dataPtr dataSizePtr
- peekTString $ castPtr dataPtr
- 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName)
- _ -> failWith "RegQueryValueEx" ret
+ bracket (regOpenKey hKey subKeyPath) regCloseKey $ \hSubKey ->
+ withForeignPtr hSubKey $ \p_key ->
+ withTString valueName $ \p_valueName ->
+ alloca $ \dataSizePtr -> do
+ poke dataSizePtr 0
+ ret <- c_RegQueryValueEx p_key p_valueName nullPtr nullPtr nullPtr dataSizePtr
+ case ret of
+ 0x0 -> do
+ dataSize <- peek dataSizePtr
+ let newDataSize = dataSize + fromIntegral (sizeOf (undefined :: TCHAR))
+ poke dataSizePtr newDataSize
+ allocaBytes (fromIntegral newDataSize) $ \dataPtr -> do
+ poke (castPtr $ plusPtr dataPtr $ fromIntegral dataSize) '\0'
+ failUnlessSuccess "RegQueryValueEx" $
+ c_RegQueryValueEx p_key p_valueName nullPtr nullPtr dataPtr dataSizePtr
+ peekTString $ castPtr dataPtr
+ 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName)
+ _ -> failWith "RegQueryValueEx" ret
setString :: KeyHandle -> String -> String -> String -> IO ()
setString (KeyHandle hKey) subKeyPath valueName valueValue =
- bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey ->
- withTString valueValue $ \p_valueValue -> do
- type_ <- getType hKey subKeyPath valueName
- regSetValueEx subKey valueName (fromMaybe rEG_SZ type_) p_valueValue $ (length valueValue + 1) * sizeOf (undefined :: TCHAR)
- notifyEnvironmentUpdate
+ bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey ->
+ withTString valueValue $ \p_valueValue -> do
+ type_ <- getType hKey subKeyPath valueName
+ regSetValueEx subKey valueName (fromMaybe rEG_SZ type_) p_valueValue $ (length valueValue + 1) * sizeOf (undefined :: TCHAR)
+ notifyEnvironmentUpdate
notifyEnvironmentUpdate :: IO ()
notifyEnvironmentUpdate =
- withTString "Environment" $ \p_lparam -> do
- let wparam = 0
- let lparam = fromIntegral $ castPtrToUINTPtr p_lparam
- let hwnd = castUINTPtrToPtr 0xffff
- _ <- sendMessage hwnd wM_SETTINGCHANGE wparam lparam
- return ()
- where
- wM_SETTINGCHANGE = 0x1A
+ withTString "Environment" $ \p_lparam -> do
+ let wparam = 0
+ let lparam = fromIntegral $ castPtrToUINTPtr p_lparam
+ let hwnd = castUINTPtrToPtr 0xffff
+ _ <- sendMessage hwnd wM_SETTINGCHANGE wparam lparam
+ return ()
+ where
+ wM_SETTINGCHANGE = 0x1A
delValue :: KeyHandle -> String -> String -> IO ()
delValue (KeyHandle hKey) subKeyPath valueName =
- bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey ->
- withForeignPtr subKey $ \subKeyPtr ->
- withTString valueName $ \p_valueName -> do
- ret <- c_RegDeleteValue subKeyPtr p_valueName
- notifyEnvironmentUpdate
- case ret of
- 0x0 -> return ()
- 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName)
- _ -> failWith "RegDeleteValue" ret
+ bracket (regOpenKey hKey subKeyPath) regCloseKey $ \subKey ->
+ withForeignPtr subKey $ \subKeyPtr ->
+ withTString valueName $ \p_valueName -> do
+ ret <- c_RegDeleteValue subKeyPtr p_valueName
+ notifyEnvironmentUpdate
+ case ret of
+ 0x0 -> return ()
+ 0x2 -> ioError $ mkIOError doesNotExistErrorType "RegQueryValueEx" Nothing $ Just (subKeyPath ++ "\\" ++ valueName)
+ _ -> failWith "RegDeleteValue" ret
hkcu :: KeyHandle
hkcu = KeyHandle hKEY_CURRENT_USER
diff --git a/src/Utils.hs b/src/Utils.hs
index 21ee67b..ec15405 100644
--- a/src/Utils.hs
+++ b/src/Utils.hs
@@ -6,24 +6,24 @@
module Utils where
-import Control.Monad ( liftM )
-import Data.Char ( toLower )
-import System.IO ( hFlush, stdout )
+import Control.Monad (liftM)
+import Data.Char (toLower)
+import System.IO (hFlush, stdout)
prompt :: String -> IO String
prompt banner = do
- putStr banner
- hFlush stdout
- getLine
+ putStr banner
+ hFlush stdout
+ getLine
promptYesNo :: String -> IO Bool
promptYesNo banner = do
- response <- liftM (map toLower) $ prompt banner
- if response `elem` yeses
- then return True
- else if response `elem` noes
- then return False
- else promptToContinue
+ response <- liftM (map toLower) $ prompt banner
+ if response `elem` yeses
+ then return True
+ else if response `elem` noes
+ then return False
+ else promptToContinue
where
yeses = ["y", "yes"]
noes = ["n", "no"]
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 15:39:48 +0000