ci-cd.yml

name: CI/CD

# Triggers the workflow on push or pull request events but only for the master branch
on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  ci-cd:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        # Necessary to grab the HEAD commit from the source branch when
        # acting on a PR. Otherwise, `git log` will only contain the merge commit
        ref: ${{ github.event.pull_request.head.sha }}

    - uses: actions/setup-node@v1
      with:
        node-version: '12.x'

    - name: Build
      run: |
        yarn install --pure-lockfile --non-interactive
        yarn build

    - name: Create Deploy Message
      run: |
        # Grab the branch path from the appropriate (PR vs. push) property on context
        FULL_PATH_REF="${{ github.event.pull_request.head.ref || github.ref }}"
        # Strip "refs/heads/" from the start
        REF=${FULL_PATH_REF#refs\/heads\/}
        # Set it in env
        echo "REF=$REF" >> $GITHUB_ENV
        
        # Get the short form of the SHA
        SHA=$(git rev-parse --short ${{ github.event.pull_request.head.sha || github.sha }})
        # Set it in env
        echo "SHA=$SHA" >> $GITHUB_ENV
        
        # Yank the commit message from the log, using the SHA
        COMMIT_MSG=$(git log -n 1 --format=%s $SHA)
        # Set it in env
        echo "COMMIT_MSG=$COMMIT_MSG" >> $GITHUB_ENV
        
        # If it's a PR, use the title, otherwise, use the commit message
        DEPLOY_MESSAGE="${{ github.event.pull_request.title || env.COMMIT_MSG }}"
        # Set it in env
        echo "DEPLOY_MESSAGE=$DEPLOY_MESSAGE" >> $GITHUB_ENV

    # Deploy preview
    - name: Deploy Preview
      uses: nwtgck/actions-netlify@v1
      id: preview
      with:
        alias: lighthouse-preview-${{ env.SHA }}
        deploy-message: "${{ env.REF }}@${{ env.SHA }}: ${{ env.DEPLOY_MESSAGE }} (Lighthouse preview)"
        github-token: ${{ secrets.GITHUB_TOKEN }}
        production-branch: 'BRANCH_THAT_WILL_NEVER_EXIST'
        publish-dir: './dist'
      env:
        NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
        NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}

    - name: Lighthouse CI
      run: |
        npm install -g @lhci/cli
        lhci autorun --collect.url=${{ steps.preview.outputs.deploy-url }}
      env:
        LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}
    
    # Deploy either preview or production
    - name: Deploy
      uses: nwtgck/actions-netlify@v1
      with:
        alias: deploy-preview-${{ env.SHA }}
        github-token: ${{ secrets.GITHUB_TOKEN }}
        deploy-message: "${{ env.REF }}@${{ env.SHA }}: ${{ env.DEPLOY_MESSAGE }} (${{ github.workflow }} workflow)"
        enable-commit-comment: true
        enable-pull-request-comment: true
        production-branch: 'master'
        publish-dir: './dist'
      env:
        NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
        NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}