lint-js.yml

name: Lint JS

on:
  # Run on pushes to select branches and on all pull requests.
  push:
    branches:
      - main
      - develop
      - trunk
      - 'feature/**'
      - 'release/**'
      - 'hotfix/[0-9]+.[0-9]+*'
  pull_request:
  # Allow manually triggering the workflow.
  workflow_dispatch:

# Cancels all previous workflow runs for the same branch that have not yet completed.
concurrency:
  # The concurrency group contains the workflow name and the branch name.
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  lint:
    runs-on: ubuntu-latest

    name: "Lint: JS"

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      # Cache the Node.js modules to speed up the workflow.
      - name: Cache Node.js modules
        uses: actions/cache@v2
        with:
          path: node_modules
          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-node-

      # The lint stage doesn't run the unit tests or use code style, so no need for PHPUnit, WPCS or phpcompatibility.
      - name: 'Install NPM packages'
        run: npm install --ignore-scripts

      # Only run ESLint on changed JavaScript files.
      - name: 'Get changed JavaScript files'
        id: jsfiles
        run: |
          echo "JS_FILES<<EOF" >> $GITHUB_ENV
          git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep '\.js$' || echo ""
          echo "EOF" >> $GITHUB_ENV

      - name: 'Run ESLint'
        if: env.JS_FILES != ''
        run: npm run lint:js -- ${{ env.JS_FILES }}