name: Generate PlantUML Diagrams
on:
  push:
    paths:
      - 'docs/diagrams/**.puml'
      - '!docs/diagrams/tracing/**.puml'
jobs:
  ci:
    runs-on: ubuntu-latest
    env:
      UML_FILES: ".puml"
    steps:
      - name: Checkout Source
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Get changed UML files
        id: getfile
        run: |
          echo "::set-output name=files::$(git diff-tree -r --no-commit-id --name-only ${{ github.sha }} | grep ${{ env.UML_FILES }} | xargs)"
      - name: UML files considered echo output
        run: |
          echo ${{ steps.getfile.outputs.files }}
      - name: Generate PNG Diagrams
        uses: cloudbees/plantuml-github-action@master
        with:
          args: -v -tpng ${{ steps.getfile.outputs.files }} -o "/github/workspace/docs/images"
      - name: Push Local Changes
        uses: stefanzweifel/git-auto-commit-action@v4.1.2
        with:
          commit_user_name: "my user name"
            commit_user_email: "me@email.org"
            commit_author: "My User <me@email.org>"
            commit_message: "Generate PNG images for PlantUML diagrams"
            branch: ${{ github.head_ref }}