feat: update flake and integration testing (#110)

.envrc

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

.github/workflows/integration.yml

@@ -0,0 +1,62 @@
+name: integration
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+env:
+  CACHIX_BINARY_CACHE: altf4llc-os
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: cachix/install-nix-action@v27
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v14
+      with:
+        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+        name: ${{ env.CACHIX_BINARY_CACHE }}
+    - uses: actions/checkout@v4
+    - run: nix develop -c just check
+
+  build:
+    needs: check
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        profile:
+          - default
+          - neovim
+    steps:
+      - uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v14
+        with:
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+          name: ${{ env.CACHIX_BINARY_CACHE }}
+      - uses: actions/checkout@v4
+      - run: nix develop -c just build "${{ matrix.profile }}"
+
+  test:
+    needs: build
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        suite:
+          - lint
+          - unit
+    steps:
+      - uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v14
+        with:
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+          name: ${{ env.CACHIX_BINARY_CACHE }}
+      - uses: actions/checkout@v4
+      - run: nix develop -c just test-${{ matrix.suite }}

.gitignore

@@ -1,3 +1,5 @@
+.direnv
+
 # Compiled Lua sources
 luac.out
 

.luacheckrc

@@ -0,0 +1,20 @@
+-- vim: ft=lua tw=80
+
+-- Rerun tests only if their modification time changed.
+cache = true
+
+ignore = {
+    "122", -- Setting a read-only field of a global variable.
+    "212", -- Unused argument, In the case of callback function, _arg_name is easier to understand than _, so this option is set to off.
+    "631", -- max_line_length, vscode pkg URL is too long
+}
+
+-- Global objects defined in the plugin
+globals = {
+    "Config"
+}
+
+-- Global objects defined by the C code
+read_globals = {
+    "vim",
+}

flake.nix

@@ -1,50 +1,64 @@
 {
-  inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; };
+  description = "lspcontainers.nvim";
 
-  outputs = { self, nixpkgs }:
-    let
-      supportedSystems =
-        [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
-      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
-      pkgs = forAllSystems (system:
-        import nixpkgs {
-          overlays = [ ];
-          inherit system;
-        });
-    in {
-      packages = forAllSystems (system: {
-        default = pkgs.${system}.vimUtils.buildVimPluginFrom2Nix {
-          name = "lspcontainers.nvim";
-          src = ./.;
-        };
-        neovim = pkgs.${system}.neovim.override {
-          configure = {
-            customRC = ''
-              lua << EOF
-                ${(builtins.readFile ./init.lua)};
-              EOF
-            '';
-            packages.main = with pkgs.${system}.vimPlugins; {
-              start = [
-                nvim-lspconfig
-                self.packages.${system}.default
-              ];
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+
+      perSystem = {
+        config,
+        pkgs,
+        system,
+        ...
+      }: let
+        inherit (pkgs) just luajitPackages mkShell neovim vimPlugins vimUtils writeShellApplication;
+        inherit (luajitPackages) luacheck vusted;
+      in {
+        packages = {
+          default = vimUtils.buildVimPlugin {
+            name = "lspcontainers.nvim";
+            src = ./.;
+          };
+
+          neovim = neovim.override {
+            configure = {
+              customRC = ''
+                lua << EOF
+                  ${(builtins.readFile ./init.lua)};
+                EOF
+              '';
+              packages.main = with vimPlugins; {
+                start = [
+                  nvim-lspconfig
+                  config.packages.default
+                ];
+              };
             };
           };
         };
-      });
 
-      devShells = forAllSystems (system: {
-        default = pkgs.${system}.mkShellNoCC {
-          buildInputs = [ self.packages.${system}.neovim ];
+        devShells = {
+          default = mkShell {
+            nativeBuildInputs = [just luacheck vusted];
+          };
         };
-      });
 
-      apps = forAllSystems (system: {
-        neovim = {
-          program = "${self.packages.${system}.neovim}/bin/nvim";
-          type = "app";
+        apps = {
+          neovim = {
+            program = "${config.packages.neovim}/bin/nvim";
+            type = "app";
+          };
+
+          test = {
+            program = "${config.packages.test}/bin/test";
+            type = "app";
+          };
         };
-      });
+      };
     };
 }

justfile

@@ -0,0 +1,19 @@
+_default:
+    just --list
+
+build profile="default":
+    nix build --json --no-link --print-build-logs ".#{{ profile }}"
+
+check:
+    nix flake check
+
+test: test-lint test-unit
+
+test-lint:
+    luacheck ./lua ./test
+
+test-unit:
+    #!/usr/bin/env bash
+    set -euxo pipefail
+    export VUSTED_NVIM=$(just build 'neovim' | jq -r '.[].outputs.out')/bin/nvim
+    vusted ./test