unify pre-commit hook & update Gitpod config

.gitignore

@@ -30,9 +30,6 @@ test/testdata/**/hie.yaml
 # shake build folder (used in benchmark suite)
 .shake/
 
-# pre-commit-hook.nix
-.pre-commit-config.yaml
-
 # direnv
 /.direnv/
 /.envrc

.gitpod.Dockerfile

@@ -0,0 +1,18 @@
+FROM gitpod/workspace-full
+
+RUN sudo install-packages build-essential curl libffi-dev libffi7 libgmp-dev libgmp10 \
+        libncurses-dev libncurses5 libtinfo5 && \
+    BOOTSTRAP_HASKELL_NONINTERACTIVE=1 \
+    BOOTSTRAP_HASKELL_MINIMAL=1 \
+    curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh && \
+    echo 'source $HOME/.ghcup/env' >> $HOME/.bashrc && \
+    echo 'export PATH=$HOME/.cabal/bin:$HOME/.local/bin:$PATH' >> $HOME/.bashrc && \
+    . /home/gitpod/.ghcup/env && \
+    ghcup install ghc --set && \
+    ghcup install hls --set && \
+    ghcup install cabal --set && \
+    ghcup install stack --set && \
+    cabal update && \
+    cabal install stylish-haskell hoogle implicit-hie && \
+    pip install pre-commit && \
+    npm install -g http-server

.gitpod.yml

@@ -1,42 +1,51 @@
+image:
+  file: .gitpod.Dockerfile
 # List the start up tasks. Learn more https://www.gitpod.io/docs/config-start-tasks/
 tasks:
-  - before: |
-      # Only the /workspace folder is persistent
-      export XDG_DATA_HOME=/workspace/.local/share
-      export XDG_CONFIG_HOME=/workspace/.local/config
-      export XDG_STATE_HOME=/workspace/.local/state
-      export XDG_CACHE_HOME=/workspace/.cache
-      export CABAL_DIR=/workspace/.cabal
-      export STACK_ROOT=/workspace/.stack
+  - name: Setup
+    before: |
+      # Make sure some folders not in /workspace persist between worksapce restarts.
+      # You may add additional directories to this list.
+      declare -a CACHE_DIRS=(
+        $HOME/.local
+        $HOME/.cabal
+        $HOME/.stack
+        $HOME/.ghcup
+        /nix
+      )
+      for DIR in "${CACHE_DIRS[@]}"; do
+        mkdir -p $(dirname /workspace/cache$DIR)
+        mkdir -p $DIR # in case $DIR doesn't already exist
+        # On a fresh start with no prebuilds, we move existing directory
+        # to /workspace. 'sudo mv' fails with 'no permission', I don't know why
+        if [ ! -d /workspace/cache$DIR ]; then
+          sudo cp -rp $DIR /workspace/cache$DIR
+          sudo rm -rf $DIR/*
+        fi
+        mkdir -p /workspace/cache$DIR # make sure it exists even if cp fails
+        # Now /workspace/cache$DIR exists.
+        # Use bind mount to make $DIR backed by /workspace/cache$DIR
+        sudo mount --bind /workspace/cache$DIR $DIR
+      done
 
-      # install ghcup, ghc and cabal
-      export GHCUP_INSTALL_BASE_PREFIX=/workspace
-      export BOOTSTRAP_HASKELL_NONINTERACTIVE=1
-      export BOOTSTRAP_HASKELL_MINIMAL=1
-      curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh
-      /workspace/.ghcup/bin/ghcup install ghc --set
-      /workspace/.ghcup/bin/ghcup install cabal
-
-      # Add ghcup binaries to the PATH since VSCode does not see 'source .ghcup/env'
-      pushd /usr/local/bin
-      sudo ln -s /workspace/.ghcup/bin/* /usr/local/bin
-      popd
-
-      # Fix the Cabal dir since VSCode does not see CABAL_DIR 
-      cabal update
-      echo "Symlinking /workspace/.cabal to ~/.cabal"
-      ln -s /workspace/.cabal ~
+      # Install pre-commit hook
+      pre-commit install
 
       # Configure VSCode to use the locally built version of HLS
       mkdir -p .vscode
-      echo '{ "haskell.serverExecutablePath": "/workspace/.cabal/bin/haskell-language-server" }' > .vscode/settings.json 
+      if [ ! -f .vscode/settings.json ]; then
+        # Only write to .vscode/settings.json if it doesn't exist.
+        echo '{ "haskell.serverExecutablePath": "/home/gitpod/.cabal/bin/haskell-language-server" }' > .vscode/settings.json
+      fi
 
-    init: | 
+      pushd docs
+        pip install -r requirements.txt
+      popd
+    init: |
+      cabal update
       cabal configure --enable-executable-dynamic
-      cabal build --enable-tests
-      cabal install exe:haskell-language-server      
-    command: | 
-      cabal build --enable-tests
+      cabal build --enable-tests all
+      cabal install exe:haskell-language-server
 
 # List the ports to expose. Learn more https://www.gitpod.io/docs/config-ports/
 ports: []
@@ -62,4 +71,4 @@ vscode:
   extensions:
     - "haskell.haskell"
     - "justusadam.language-haskell"
-    - "usernamehw.errorlens"
+    - "EditorConfig.EditorConfig"

CODEOWNERS

@@ -44,3 +44,4 @@
 # Build
 *.nix @berberman @michaelpj @guibou
 *.project @jneira
+.gitpod.* @kokobd

docs/contributing/contributing.md

@@ -170,49 +170,13 @@ Please, try to follow those basic settings to keep the codebase as uniform as po
 
 ### Formatter pre-commit hook
 
-We are using [pre-commit-hook.nix](https://github.com/cachix/pre-commit-hooks.nix) to configure git pre-commit hook for formatting. Although it is possible to run formatting manually, we recommend you to use it to set pre-commit hook as our CI checks pre-commit hook is applied or not.
+We are using [pre-commit](https://pre-commit.com/) to configure git pre-commit hook for formatting. Although it is possible to run formatting manually, we recommend you to use it to set pre-commit hook as our CI checks pre-commit hook is applied or not.
 
-You can configure the pre-commit-hook by running
+If you are using Nix or Gitpod, pre-commit hook is automatically installed. Otherwise, follow instructions on
+[https://pre-commit.com/](https://pre-commit.com/) to install the `pre-commit` tool, then run the following command:
 
-``` bash
-nix-shell
-```
-
-If you don't want to use [nix](https://nixos.org/guides/install-nix.html), you can instead use [pre-commit](https://pre-commit.com) with the following config.
-
-```json
-{
-  "repos": [
-    {
-      "hooks": [
-        {
-          "entry": "stylish-haskell --inplace",
-          "exclude": "(^Setup.hs$|test/testdata/.*$|test/data/.*$|test/manual/lhs/.*$|^hie-compat/.*$|^plugins/hls-tactics-plugin/.*$|^ghcide/src/Development/IDE/GHC/Compat.hs$|^ghcide/src/Development/IDE/Plugin/CodeAction/ExactPrint.hs$|^ghcide/src/Development/IDE/GHC/Compat/Core.hs$|^ghcide/src/Development/IDE/Spans/Pragmas.hs$|^ghcide/src/Development/IDE/LSP/Outline.hs$|^plugins/hls-splice-plugin/src/Ide/Plugin/Splice.hs$|^ghcide/test/exe/Main.hs$|ghcide/src/Development/IDE/Core/Rules.hs|^hls-test-utils/src/Test/Hls/Util.hs$)",
-          "files": "\\.l?hs$",
-          "id": "stylish-haskell",
-          "language": "system",
-          "name": "stylish-haskell",
-          "pass_filenames": true,
-          "types": [
-            "file"
-          ]
-        }
-      ],
-      "repo": "local"
-    },
-    {
-       "repo": "https://github.com/pre-commit/pre-commit-hooks",
-       "rev": "v4.1.0",
-       "hooks": [
-          {
-            "id": "mixed-line-ending",
-            "args": ["--fix", "lf"],
-            "exclude": "test/testdata/.*CRLF*.hs$"
-          }
-       ]
-    }
-  ]
-}
+```sh
+pre-commit install
 ```
 
 #### Why some components are excluded from automatic formatting?

flake.nix

@@ -14,9 +14,6 @@
       flake = false;
     };
     flake-utils.url = "github:numtide/flake-utils";
-    pre-commit-hooks = {
-      url = "github:cachix/pre-commit-hooks.nix";
-    };
     gitignore = {
       url = "github:hercules-ci/gitignore.nix";
       flake = false;
@@ -92,7 +89,7 @@
       flake = false;
     };
     myst-parser = {
-      url = "github:smunix/MyST-Parser?ref=fix.hls-docutils"; 
+      url = "github:smunix/MyST-Parser?ref=fix.hls-docutils";
       flake = false;
     };
     # For https://github.com/readthedocs/sphinx_rtd_theme/pull/1185, otherwise lists are broken locally
@@ -103,7 +100,7 @@
     poetry2nix.url = "github:nix-community/poetry2nix/master";
   };
   outputs =
-    inputs@{ self, nixpkgs, flake-compat, flake-utils, pre-commit-hooks, gitignore, ... }:
+    inputs@{ self, nixpkgs, flake-compat, flake-utils, gitignore, ... }:
     {
       overlays.default = final: prev:
         with prev;
@@ -123,7 +120,7 @@
               in hsuper.mkDerivation (args // {
                 jailbreak = if broken then true else jailbreak;
                 doCheck = if broken then false else check;
-                # Library profiling is disabled as it causes long compilation time 
+                # Library profiling is disabled as it causes long compilation time
                 # on our CI jobs. Nix users are free tor revert this anytime.
                 enableLibraryProfiling = false;
                 doHaddock = false;
@@ -215,42 +212,11 @@
           config = { allowBroken = true; };
         };
 
-        # Pre-commit hooks to run stylish-haskell
-        pre-commit-check = hpkgs: pre-commit-hooks.lib.${system}.run {
-          src = ./.;
-          hooks = {
-            stylish-haskell.enable = true;
-            # use stylish-haskell with our target ghc
-            stylish-haskell.entry = pkgs.lib.mkForce "${hpkgs.stylish-haskell}/bin/stylish-haskell --inplace";
-            stylish-haskell.excludes = [
-              # Ignored files
-              "^Setup.hs$"
-              "test/testdata/.*$"
-              "test/data/.*$"
-              "test/manual/lhs/.*$"
-              "^hie-compat/.*$"
-              "^plugins/hls-tactics-plugin/.*$"
-
-              # Temporarily ignored files
-              # Stylish-haskell (and other formatters) does not work well with some CPP usages in these files
-              "^ghcide/src/Development/IDE/GHC/Compat.hs$"
-              "^ghcide/src/Development/IDE/Plugin/CodeAction/ExactPrint.hs$"
-              "^ghcide/src/Development/IDE/GHC/Compat/Core.hs$"
-              "^ghcide/src/Development/IDE/Spans/Pragmas.hs$"
-              "^ghcide/src/Development/IDE/LSP/Outline.hs$"
-              "^plugins/hls-splice-plugin/src/Ide/Plugin/Splice.hs$"
-              "^ghcide/test/exe/Main.hs$"
-              "ghcide/src/Development/IDE/Core/Rules.hs"
-              "^hls-test-utils/src/Test/Hls/Util.hs$"
-            ];
-          };
-        };
-
         ghc902Config = (import ./configuration-ghc-90.nix) { inherit pkgs inputs; };
         ghc922Config = (import ./configuration-ghc-92.nix) { inherit pkgs inputs; };
 
         # GHC versions
-        # While HLS still works fine with 8.10 GHCs, we only support the versions that are cached 
+        # While HLS still works fine with 8.10 GHCs, we only support the versions that are cached
         # by upstream nixpkgs, which now only includes GHC version 9+
         supportedGHCs = let
           ghcVersion = "ghc" + (pkgs.lib.replaceStrings ["."] [""] pkgs.haskellPackages.ghc.version);
@@ -268,14 +234,14 @@
         myst-parser = pkgs.poetry2nix.mkPoetryEnv {
           projectDir = inputs.myst-parser;
           python = pkgs.python39;
-          overrides = [ 
+          overrides = [
             pkgs.poetry2nix.defaultPoetryOverrides
           ];
         };
         sphinx_rtd_theme = pkgs.poetry2nix.mkPoetryEnv {
           projectDir = inputs.sphinx_rtd_theme;
           python = pkgs.python39;
-          overrides = [ 
+          overrides = [
             pkgs.poetry2nix.defaultPoetryOverrides
             (self: super: {
               # The RTD theme doesn't work with newer docutils
@@ -334,8 +300,8 @@
             export DYLD_LIBRARY_PATH=${gmp}/lib:${zlib}/lib:${ncurses}/lib:${capstone}/lib
             export PATH=$PATH:$HOME/.local/bin
 
-            # Enable the shell hooks
-            ${self.checks.${system}.pre-commit-check.shellHook}
+            # Install pre-commit hook
+            pre-commit install
 
             # If the cabal project file is not the default one.
             # Print a warning and generate an alias.