name: Update go dependencies and create PR

on:
  # Allow to trigger this manually just in case updates are required outside of the schedule. See https://goobar.io/2019/12/07/manually-trigger-a-github-actions-workflow/ for info on how that works.
  repository_dispatch:
    types: update-dependencies
  # Schedule once a month
  schedule:
    - cron:  '0 10 3 * *'

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-go@v1
        with:
          go-version: '1.15.x'
      - name: Perform update
        run: |
          git checkout -B gh-action-update-golang-dependencies
          go get -u
          go mod tidy
          git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git commit -am "Automated go dependency update"
          git push origin gh-action-update-golang-dependencies -f
      - name: Create Pull Request
        uses: SAP/project-piper-action@master
        with:
          piper-version: master
          command: githubCreatePullRequest
          flags: --body="Automated update for Go dependencies by running `go get -u` and `go mod tidy`" --head=gh-action-update-golang-dependencies --title="Update Go dependencies" --token ${{ secrets.GO_DEPENDENCY_UPDATE_TOKEN }}