name: Upgrade to latest versions

on:
  schedule:
    - cron: '37 13 * * *'
jobs:
  versions:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - uses: actions/setup-go@v2
      with:
        go-version: 1.16
    - name: Upgrade versions
      run: |
        export GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}
        # Write to temporary file to make update atomic
        scripts/generate-versions.sh > /tmp/versions.json
        mv /tmp/versions.json jsonnet/kube-prometheus/versions.json
    - name: Install jsonnet bundler
      run: |
        go get github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb
    - name: Update jsonnet dependencies
      run: |
        jb update
        make --always-make generate

        # Reset jsonnetfile.lock.json if no dependencies were updated
        changedFiles=$(git diff --name-only | grep -v 'jsonnetfile.lock.json')
        if [[ $changedFiles == "" ]]; then
          git checkout -- jsonnetfile.lock.json;
        fi
    - name: Create Pull Request
      uses: peter-evans/create-pull-request@v3
      with:
        commit-message: "[bot] Automated version update"
        title: "[bot] Automated version update"
        body: |
          This is an automated version and jsonnet dependencies update performed from CI on behalf of @paulfantom.

          Configuration of the workflow is located in `.github/workflows/versions.yaml`
        team-reviewers: kube-prometheus-reviewers
        labels: kind/enhancement
        branch: automated-updates
        delete-branch: true
        # GITHUB_TOKEN cannot be used as it won't trigger CI in a created PR
        # More in https://github.com/peter-evans/create-pull-request/issues/155
        # TODO(paulfantom) Consider running this from a special bot account.
        token: ${{ secrets.PAT }}