feat: Add ESLint

.editorconfig

@@ -1,6 +1,7 @@
-root = true
-
-[*]
-insert_final_newline = true
-indent_style = space
-indent_size = 2
+root = true
+
+[*]
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+end_of_line = lf

.eslintrc.js

@@ -0,0 +1,44 @@
+/**
+ * Copyright (C) Daniel Kuschny (Danielku15) and contributors.
+ * Copyright (C) Microsoft Corporation. All rights reserved.
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ */
+
+module.exports = {
+  env: {
+    browser: true,
+    es2021: true,
+  },
+  extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
+  overrides: [
+    {
+      env: {
+        node: true,
+      },
+      files: ['.eslintrc.{js,cjs}'],
+      parserOptions: {
+        sourceType: 'script',
+      },
+    },
+  ],
+  ignorePatterns: ['out/**', 'test-workspaces/**', 'src/typings/**', 'resources/**'],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint', 'license-header'],
+  rules: {
+    indent: ['error', 2],
+    'linebreak-style': ['error', 'unix'],
+    quotes: ['error', 'single'],
+    semi: ['error', 'always'],
+    '@typescript-eslint/no-explicit-any': 'off',
+    '@typescript-eslint/no-var-requires': 'off',
+    'prefer-const': ['error', { destructuring: 'all' }],
+    'license-header/header': ['error', './resources/license-header.js'],
+  },
+};

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/dependabot.yml

@@ -1,6 +1,12 @@
-version: 2
-updates:
-  - package-ecosystem: 'npm'
-    directory: '/'
-    schedule:
-      interval: 'weekly'
+version: 2
+updates:
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'weekly'
+    ignore:
+      # VS Code doesn't support ESM and Chai, need to stay on chai 4.x
+      # https://github.com/microsoft/vscode/issues/160416
+      # https://github.com/microsoft/vscode/issues/130367
+      # https://github.com/microsoft/vscode-loader/issues/56
+      - dependency-name: 'chai'

.github/workflows/build.yml

@@ -1,48 +1,62 @@
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-  actions: read
-  checks: write
-
-jobs:
-  build:
-    name: Build and Test
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
-        vscode-version: ['stable', 'insiders']
-        vscode-platform: ['desktop']
-    runs-on: ${{ matrix.os }}
-    env:
-      VSCODE_TEST_VERSION: ${{matrix.vscode-version}}
-      VSCODE_TEST_PLATFORM: ${{matrix.vscode-platform}}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: lts/*
-      - run: npm install
-      - run: npm run compile:test
-      - name: Print Test Config
-        run: node ./.vscode-test.mjs
-        env:
-          VSCODE_CONFIG_LOG: true
-      - run: xvfb-run -a npm test
-        if: runner.os == 'Linux'
-      - run: npm test
-        if: runner.os != 'Linux'
-      - uses: dorny/test-reporter@v1
-        if: always()
-        with:
-          name: VS Code Test Results (${{matrix.os}}, ${{matrix.vscode-version}}, ${{matrix.vscode-platform}})
-          path: 'test-results/*.json'
-          reporter: mocha-json
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  actions: read
+  checks: write
+
+jobs:
+  build:
+    name: Build and Test
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+        vscode-version: ['stable', 'insiders']
+        vscode-platform: ['desktop']
+    runs-on: ${{ matrix.os }}
+    env:
+      VSCODE_TEST_VERSION: ${{matrix.vscode-version}}
+      VSCODE_TEST_PLATFORM: ${{matrix.vscode-platform}}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Compile
+        run: npm run compile:test
+
+      - name: Print Test Config
+        run: node ./.vscode-test.mjs
+        env:
+          VSCODE_CONFIG_LOG: true
+
+      - name: Run Tests (Linux)
+        run: xvfb-run -a npm test
+        if: runner.os == 'Linux'
+      - name: Run Tests (Win/MacOS)
+        run: npm test
+        if: runner.os != 'Linux'
+
+      - name: Run Linter
+        if: always()
+        run: npm run lint
+
+      - uses: dorny/test-reporter@v1
+        if: always()
+        with:
+          name: VS Code Test Results (${{matrix.os}}, ${{matrix.vscode-version}}, ${{matrix.vscode-platform}})
+          path: 'test-results/*.json'
+          reporter: mocha-json