Add lint, lint:fix commands (#17)

* Adding eslint, typescript-eslint

* Add eslint header plugin

* Add to ci.yml, ban warnings

* Add @Stylistic plugin for basic formatting checks

* Cleanup lint commands

* Downgrade eslint for better editor support with legacy config

.eslintignore

@@ -0,0 +1,2 @@
+dist/
+.eslintrc.js

.eslintrc.js

@@ -0,0 +1,43 @@
+module.exports = {
+  env: {
+    node: true
+  },
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended'
+  ],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: true
+  },
+  plugins: [
+    '@stylistic',
+    '@typescript-eslint',
+    'header',
+  ],
+  root: true,
+  rules: {
+    '@stylistic/array-bracket-spacing': [ 'error', 'always' ],
+    '@stylistic/indent': [ 'error', 2 ],
+    '@stylistic/object-curly-spacing': [ 'error', 'always' ],
+    '@stylistic/quotes': [ 'error', 'single', { 'avoidEscape': true, 'allowTemplateLiterals': true } ],
+    '@stylistic/semi': 'error',
+    'header/header': [2, 'block', [
+      '',
+      ' * Copyright Splunk Inc.',
+      ' *',
+      ' * Licensed under the Apache License, Version 2.0 (the "License");',
+      ' * you may not use this file except in compliance with the License.',
+      ' * You may obtain a copy of the License at',
+      ' *',
+      ' *     http://www.apache.org/licenses/LICENSE-2.0',
+      ' *',
+      ' * Unless required by applicable law or agreed to in writing, software',
+      ' * distributed under the License is distributed on an "AS IS" BASIS,',
+      ' * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.',
+      ' * See the License for the specific language governing permissions and',
+      ' * limitations under the License.',
+      ''
+    ], 2],
+  }
+};

.github/workflows/ci.yml

@@ -19,5 +19,7 @@ jobs:
         run: npm ci
       - name: Build
         run: npm run build
+      - name: Lint
+        run: npm run lint
       - name: Unit tests
         run: npm run test:unit