update-javascript-on-main.yml

# Script to update files that should have been automatically generated.
name: Automatically update generated files

on:
  push:
    branches: [ main ]
  pull_request_target:
    branches: [ main ]
    types: [opened, synchronize, reopened]

jobs:
  autopr:

    runs-on: ubuntu-latest

    permissions:
      # Give the default GITHUB_TOKEN write permission to commit and push the changed files back to the repository.
      contents: write
      # For commenting on a PR
      pull-requests: write

    steps:
    - name: Print event (for debugging)
      run: cat $GITHUB_EVENT_PATH

    #----------------------------------------------------------------------
    # Either use FELIENNE_GITHUB_ACCESS_TOKEN or GITHUB_TOKEN
    # GITHUB_TOKEN can do fewer things (push to main, trigger new GHAs, etc).
    - name: Check for presence of GitHub Token
      id: secret
      run: |
        if [ ! -z "${{ secrets.FELIENNE_GITHUB_ACCESS_TOKEN }}" ]; then
          echo "We have a token!"
          echo "secret=${{ secrets.FELIENNE_GITHUB_ACCESS_TOKEN }}" >> $GITHUB_OUTPUT
        else
          echo "We do not have a token"
          echo "secret=${{ secrets.GITHUB_TOKEN }}" >> $GITHUB_OUTPUT
        fi

    - name: Determine branch name
      id: branch
      run: |
        if [[  "${{ github.event_name }}" == "pull_request"* ]]; then
          echo "Pull Request"
          echo "branch=${{ github.event.pull_request.head.ref }}" >> $GITHUB_OUTPUT
          echo "repo=${{ github.event.pull_request.head.repo.full_name }}" >> $GITHUB_OUTPUT
        elif [[  "${{ github.event_name }}" == "push" ]]; then
          echo "Push Event"
          echo "branch=${{ github.ref }}" >> $GITHUB_OUTPUT
          echo "repo=${{ github.event.repository.full_name }}" >> $GITHUB_OUTPUT
        else
          echo "Unsupported event type!" >&2
          exit 1
        fi

    #----------------------------------------------------------------------
    #  Checkout source
    #
    # We need to pass the token here -- the commit action below will not overwrite the token to push.
    # This is necessary to bypass branch protection (which will disallow non-reviewed pushes otherwise)
    #
    # Make a distinction between Pull Request checkout and Push checkout. Push checkout
    # works mostly automatically, but for PRs we must be very explicit to get the right
    # branch and also support forks.
    - uses: actions/checkout@v4
      name: Checkout branch
      with:
        fetch-depth: 1
        ref: ${{ steps.branch.outputs.branch }}
        repository: ${{ steps.branch.outputs.repo }}
        token: ${{ steps.secret.outputs.secret }}

    #----------------------------------------------------------------------
    #  Actual build

    - name: Set up Python 3.12
      uses: actions/setup-python@v1
      with:
        python-version: 3.12
    - name: Install Python dependencies
      run: |
        python3 -m pip install --upgrade pip
        pip3 install -r requirements.txt

    #----------------------------------------------------------------------
    #  Set up cache so that running snippet tests is somewhat cheap
    - name: Calculate hedy cache key
      run: "echo value=$(ls -1 hedy.py grammars/* | sort | xargs tail -n 99999999 | sha256sum | cut -f 1 -d ' ') >> $GITHUB_OUTPUT"
      id: hedy_cache_key
    - name: Cache hedy test runs
      uses: actions/cache@v3
      with:
        path: .test-cache
        key: "hedy-test-cache-${{ steps.hedy_cache_key.outputs.value }}"

    - name: Automatically update generated files
      run: |
        doit run _autopr

    - name: Automatically update generated files (for Weblate PRs)
      if: ${{ github.event.pull_request.user.login == 'weblate' }}
      run: |
        doit run _autopr_weblate

    - name: Prepare comment
      if: ${{ hashFiles('snippet-report.md.tmp') != '' }}
      run: |
        echo 'The automatic script made changes' >> comment.md.tmp
        cat snippet-report.md.tmp >> comment.md.tmp

    - name: Post comment
      if: ${{ hashFiles('comment.md.tmp') != '' && github.event_name == 'pull_request_target' }}
      uses: thollander/actions-comment-pull-request@v2
      with:
        filePath: comment.md.tmp

    #----------------------------------------------------------------------
    #  Commit back
    # For some reason, we must supply the token here again, even though
    # we already supplied it during checkout.
    - name: Commit changed files (with token)
      uses: stefanzweifel/git-auto-commit-action@v2.3.0
      with:
        commit_message: 🤖 Automatically update generated files
        branch: ${{ steps.branch.outputs.branch }}
      env:
        GITHUB_TOKEN: ${{ steps.secret.outputs.secret }}