build: lint (#52)

.eslintignore

@@ -0,0 +1 @@
+dist

.eslintrc.json

@@ -0,0 +1,30 @@
+{
+  "root": true,
+  "env": {
+    "browser": true,
+    "es2021": true,
+    "node": true
+  },
+  "extends": ["standard-with-typescript", "plugin:prettier/recommended"],
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module",
+    "project": ["./tsconfig.json"]
+  },
+  "rules": {
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/ban-ts-comment": "off",
+    "@typescript-eslint/no-misused-promises": "off",
+    "@typescript-eslint/naming-convention": "off",
+    "@typescript-eslint/prefer-nullish-coalescing": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "warn",
+      {
+        "argsIgnorePattern": "^_",
+        "varsIgnorePattern": "^_",
+        "caughtErrorsIgnorePattern": "^_"
+      }
+    ]
+  }
+}

.github/actions/prepare/action.yml

@@ -0,0 +1,17 @@
+name: Prepare
+
+description: Checkout and install dependencies
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-node@v3
+      with:
+        node-version: '18.x'
+        registry-url: 'https://registry.npmjs.org'
+    - name: Install npm
+      shell: bash
+      run: npm install -g npm
+    - name: Install dependencies
+      shell: bash
+      run: npm ci

.github/workflows/checks.yml

@@ -0,0 +1,45 @@
+name: Checks
+
+on:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Prepare
+        uses: ./.github/actions/prepare
+      - name: Build
+        run: npm run build
+
+  format:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Prepare
+        uses: ./.github/actions/prepare
+      - name: Lint
+        run: npm run format:check
+
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Prepare
+        uses: ./.github/actions/prepare
+      - name: Lint
+        run: npm run lint
+
+  may-merge:
+    needs: ['format', 'lint', 'build']
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleared for merging
+        run: echo OK