name: Check for updates

on:
  schedule:
    # Crontab every Wednesday at 8 AM.
    - cron: 0 8 * * 3
  workflow_dispatch:
    branches:
      - add-new-release

jobs:
  pull-request:
    # https://github.com/actions/virtual-environments
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Run update check
        run: echo "version=$(bash check-updates.sh --version-only)" >> $GITHUB_ENV

      - name: Create new branch
        run: git branch add-new-release

      - name: Update version number
        run: |
          sed -i "s/PREV_RELEASE=.*/PREV_RELEASE=\"$(echo '${{env.version}}' | \
              awk '{print $1}')\"/" \
              check-updates.sh

      - name: Open pull request
        # https://docs.github.com/en/actions/learn-github-actions/expressions
        if: contains(env.version, '>')
        uses: peter-evans/create-pull-request@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "feat: update release version"
          committer: GitHub <noreply@github.com>
          author: ${{ github.actor }} <${{ github.actor }}@users.noreply.github.com>
          branch: add-new-release
          base: main
          title: "Add new release"
          body: "A new release of GNU IceCat has been detected."