[feat] upgrade to text 2.0

.envrc

@@ -0,0 +1 @@
+use flake . -Lv 

.github/workflows/test-flake.yml

@@ -0,0 +1,19 @@
+name: "Check Flake"
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+jobs:
+  check-flake:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: cachix/install-nix-action@v22
+      with:
+        github_access_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: "flake check"
+      run: nix flake check -Lv --allow-import-from-derivation --fallback --accept-flake-config
+    - name: GHC 9.4
+      run: nix build .#ghc94-text-icu-translit -Lv --fallback --accept-flake-config
+    - name: GHC 9.6
+      run: nix build .#ghc96-text-icu-translit -Lv --fallback --accept-flake-config

.github/workflows/update-flake-lock.yml

@@ -0,0 +1,21 @@
+name: update-flake-lock
+on:
+  workflow_dispatch: # allows manual triggering
+  schedule:
+    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
+
+jobs:
+  lockfile:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Update flake.lock
+        uses: DeterminateSystems/update-flake-lock@main
+        with:
+          pr-title: "Update flake.lock" # Title of PR to be created
+          pr-labels: |                  # Labels to be set on the PR
+            dependencies
+            automated

.gitignore

@@ -0,0 +1,4 @@
+.direnv
+result*
+dist-newstyle
+.pre-commit-config.yaml

Data/Text/ICU/Translit.hs

@@ -2,39 +2,32 @@
 --  Module:     Data.Text.ICU.Translit
 --  License:    BSD-style
 --  Maintainer: me@lelf.lu
--- 
+--
 -- This module provides the bindings to the transliteration features
 -- by the ICU (International Components for Unicode) library.
--- 
+--
 -- >>> IO.putStrLn $ transliterate (trans "name-any; ru") "\\N{RABBIT FACE} Nu pogodi!"
 -- 🐰 Ну погоди!
--- 
+--
 -- >>> IO.putStrLn $ transliterate (trans "nl-title") "gelderse ijssel"
 -- Gelderse IJssel
--- 
+--
 -- >>> IO.putStrLn $ transliterate (trans "ja") "Amsterdam"
 -- アムステルダム
--- 
+--
 -- More information about the rules is
 -- <http://userguide.icu-project.org/transforms/general here>.
+module Data.Text.ICU.Translit (IO.Transliterator, trans, transliterate) where
 
-
-
-module Data.Text.ICU.Translit
-    (IO.Transliterator, trans, transliterate) where
-
-import qualified Data.Text.ICU.Translit.IO as IO
-import System.IO.Unsafe
 import Data.Text
-
+import Data.Text.ICU.Translit.IO qualified as IO
+import System.IO.Unsafe
 
 -- | Construct new transliterator by name. Will throw an error if
 -- there is no such transliterator
 trans :: Text -> IO.Transliterator
 trans t = unsafePerformIO $ IO.transliterator t
 
-
 -- | Transliterate the text using the transliterator
 transliterate :: IO.Transliterator -> Text -> Text
 transliterate tr txt = unsafePerformIO $ IO.transliterate tr txt
-

Data/Text/ICU/Translit/IO.hs

@@ -1,54 +1,69 @@
 module Data.Text.ICU.Translit.IO
-    (Transliterator,
-     transliterator,
-     transliterate) where
+  ( Transliterator,
+    transliterator,
+    transliterate,
+  )
+where
 
-import Foreign
-import Data.Text
-import Data.Text.Foreign
+import Data.ByteString (ByteString)
+import Data.ByteString qualified as BS
+import Data.Text (Text)
+import Data.Text.Encoding qualified as T
 import Data.Text.ICU.Translit.ICUHelper
+  ( UChar,
+    UErrorCode,
+    handleError,
+    handleFilledOverflowError,
+  )
+import Foreign
 
 data UTransliterator
 
-foreign import ccall "trans.h __hs_translit_open_trans" openTrans
-    :: Ptr UChar -> Int -> Ptr UErrorCode -> IO (Ptr UTransliterator)
-foreign import ccall "trans.h &__hs_translit_close_trans" closeTrans
-    :: FunPtr (Ptr UTransliterator -> IO ())
-foreign import ccall "trans.h __hs_translit_do_trans" doTrans
-    :: Ptr UTransliterator -> Ptr UChar -> Int32 -> Int32
-    -> Ptr UErrorCode -> IO Int32
+foreign import ccall "trans.h __hs_translit_open_trans"
+  openTrans ::
+    Ptr UChar -> Int -> Ptr UErrorCode -> IO (Ptr UTransliterator)
 
+foreign import ccall "trans.h &__hs_translit_close_trans"
+  closeTrans ::
+    FunPtr (Ptr UTransliterator -> IO ())
 
+foreign import ccall "trans.h __hs_translit_do_trans"
+  doTrans ::
+    Ptr UTransliterator ->
+    Ptr UChar ->
+    Int32 ->
+    Int32 ->
+    Ptr UErrorCode ->
+    IO Int32
 
-data Transliterator = Transliterator {
-      transPtr :: ForeignPtr UTransliterator,
-      transSpec :: Text
-    }
-
+data Transliterator = Transliterator
+  { transPtr :: ForeignPtr UTransliterator,
+    transSpec :: Text
+  }
 
 instance Show Transliterator where
-    show tr = "Transliterator " ++ show (transSpec tr)
-
-
+  show tr = "Transliterator " ++ show (transSpec tr)
 
+-- we just assume little endian
 transliterator :: Text -> IO Transliterator
-transliterator spec =
-    useAsPtr spec $ \ptr len -> do
-           q <- handleError $ openTrans ptr (fromIntegral len)
-           ref <- newForeignPtr closeTrans q
-           touchForeignPtr ref
-           return $ Transliterator ref spec
-
+transliterator spec = do
+  let specStr :: ByteString = T.encodeUtf16LE spec
+  BS.useAsCStringLen specStr $ \((castPtr @_ @Word16) -> ptr, (`div` 2) -> len) -> do
+    q <- handleError $ openTrans ptr (fromIntegral len)
+    ref <- newForeignPtr closeTrans q
+    return $ Transliterator ref spec
 
 transliterate :: Transliterator -> Text -> IO Text
 transliterate tr txt = do
-  (fptr, len) <- asForeignPtr txt
-  withForeignPtr fptr $ \ptr ->
-      withForeignPtr (transPtr tr) $ \tr_ptr -> do
-             handleFilledOverflowError ptr (fromIntegral len)
-                 (\dptr dlen ->
-                        doTrans tr_ptr dptr (fromIntegral len) (fromIntegral dlen))
-                 (\dptr dlen ->
-                        fromPtr (castPtr dptr) (fromIntegral dlen))
-
-
+  let txtAsBs :: ByteString = T.encodeUtf16LE txt
+  BS.useAsCStringLen txtAsBs \((castPtr @_ @Word16) -> ptr, (`div` 2) -> len) ->
+    withForeignPtr (transPtr tr) $ \tr_ptr -> do
+      handleFilledOverflowError
+        ptr
+        len
+        ( \dptr dlen ->
+            doTrans tr_ptr dptr (fromIntegral len) dlen
+        )
+        ( \dptr dlen ->
+            T.decodeUtf16LE <$> BS.packCStringLen (castPtr dptr, dlen * 2)
+        )

Data/Text/ICU/Translit/Play.hs

@@ -1,6 +1,2 @@
-
 import Data.Text.ICU.Translit
 import Data.Text.IO as IO
-
-
-

README.md

@@ -1,4 +1,4 @@
-ICU transliteration for Haskell
+# ICU transliteration for Haskell
 
     >>> IO.putStrLn $ transliterate (trans "name-any; ru") "\\N{RABBIT FACE} Nu pogodi!"
     🐰 Ну погоди!
@@ -9,3 +9,22 @@ ICU transliteration for Haskell
     >>> IO.putStrLn $ transliterate (trans "ja") "Amsterdam"
     アムステルダム
 
+## Developing
+
+- to see available outputs (targets), run 
+  ```sh
+  nix flake show --allow-import-from-derivation
+  ```
+- with `flakes` and `nix command` enabled, run
+  ```sh
+  nix develop -Lv
+  ```
+  to be dropped into a `devShell` or, alternatively, if you use `direnv`, run
+  ```sh
+  direnv allow
+  ```
+- to build and run the tests, run
+  ```sh
+  nix build -Lv
+  ```
+- refer to the [flake parts](https://flake.parts) and the [haskell flake](https://zero-to-flakes.com/haskell-flake/) documentations if you want to change the flake configs

cabal.project

@@ -0,0 +1,4 @@
+packages:
+  .
+
+test-show-details: direct