name: Continuous Updates

on:
  push:
    branches: [ dependabot/npm_and_yarn/** ]
  pull_request:
    types: [opened, synchronize, reopened]
    branches: [ dependabot/npm_and_yarn/** ]

jobs:
  update-manifests:
    runs-on: ubuntu-latest
    steps:
    - uses: technote-space/auto-cancel-redundant-job@v1
    - uses: actions/checkout@v2
      with:
        fetch-depth: 20
        persist-credentials: false
    - name: Setup Node.js
      uses: actions/setup-node@v2.1.5
      with:
        node-version: '14.x'
    - name: Config Git
      run: |
        git config --global user.name '${{ github.event.commits[0].author.name }}'
        git config --global user.email '${{ github.event.commits[0].author.email }}'
    - name: Fix yarn.lock
      run: |
        # get current branch
        echo ::set-env name=GITHUB_REF_SLUG::"$(git branch --show-current)"
        # revert changes to yarn.lock
        git checkout ${{ github.sha }}^ -- yarn.lock
        # IF only yarn.lock changed, update package.json too
        git diff --name-only HEAD^ HEAD | grep -q 'package.json' || yarn up `git log -1 --pretty=%s | awk '{ print $3 }'`
        # regardless, run yarn to update yarn.lock
        yarn
        # stage package.json and yarn.lock
        git add yarn.lock package.json
        # commit changes
        git commit --amend --no-edit --allow-empty -n 
      env:
        YARN_CHECKSUM_BEHAVIOR: update
        YARN_ENABLE_SCRIPTS: 0
    - name: Test
      run: yarn run test
    - name: Push changes
      uses: ad-m/github-push-action@v0.6.0
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        branch: ${{ env.GITHUB_REF_SLUG }}
        force: true