name: Markdown Compiler

on:
  push:
    paths:
      - '**/*.md'

jobs:
  build:
    name: Run
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 2

      - name: Get changed files
        id: getfile
        run: echo "::set-output name=files::$(git diff-tree --no-commit-id --name-only -r ${{ github.sha }} | grep -e '.*\.md$' | xargs)"

      - name: MD files changed
        run: echo ${{ steps.getfile.outputs.files }}

      - name: Compile mermaid
        uses: neenjaw/compile-mermaid-markdown-action@master
        with:
          files: ${{ steps.getfile.outputs.files }}
          output: '.resources'
        env:
          HIDE_CODEBLOCKS: 1
          ABSOLUTE_IMAGE_LINKS: 1

      - name: Show changes
        run: git status

      - name: Commit files
        run: |
          git config --local user.email "action@github.com"
          git config --local user.name "GitHub Action"
          git add .
          git diff-index --quiet HEAD || git commit -m "Add markdown changes"

      - name: Push changes
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: ${{ github.ref }}