check-for-updates.yml

name: Check for updates

on:
  workflow_dispatch:
  # Check at 03:40 on Fridays, i.e. once a week.
  schedule:
  - cron: '40 3 * * 5'

jobs:
  check-for-updates:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        emacs_version: ['29.1']

    steps:
    - name: Set up Emacs
      uses: jcs090218/setup-emacs@master
      with:
        version: ${{matrix.emacs_version}}

    - name: Install Eldev
      uses: emacs-eldev/setup-eldev@v1

    - name: Install Java
      uses: actions/setup-java@v4
      with:
        distribution: 'zulu'
        java-version: '17'

    - name: Check out the source code
      uses: actions/checkout@v4

    - name: Check if 'extmap' files are up-to-date
      # I haven't found any good way to send a notification from a
      # GitHub workflow.  Apparently, we can only let it fail if there
      # is something to say, and let notification recipients find it
      # out from the logs.  Also run tests so that it is immediately
      # visible if something is broken by the changes.
      run: |
        for file in *.extmap; do
            cp $file $file.old;
        done

        java --version
        eldev -dtT -C build *.extmap --force --set dev

        num_updated=0
        updated_maps=""

        for file in *.extmap; do
            if [ $(eldev --quiet eval "(not (extmap-equal-p \"$file.old\" \"$file\" '(:broken)))") != $(echo "nil") ]; then
                echo
                echo "Comparing '$file.old' vs. '$file' (i.e. with the new version being the second map):"
                eldev --quiet exec "(not (extmap-equal-p \"$file.old\" \"$file\" '(:broken) t))"
                num_updated=$(expr $num_updated + 1)
                updated_maps="$updated_maps$file "
            fi
        done

        if [ $num_updated -gt 0 ]; then
            echo
            echo "Re-running tests with the updated maps:"
            eldev -p -dtT -C test --expect 20
            echo
            echo "Map(s) that should be regenerated: $updated_maps"
            false
        fi