name: Build the web book

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  build_docs:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
    - uses: actions/checkout@v3

    - uses: actions/setup-python@v4
      with:
        python-version: "3.11"

    - name: Install docgen
      run: pip install ./doc

    - name: Generate file
      run: hexdoc doc/properties.toml -o index.html.uncommitted

    - name: Check out gh-pages
      uses: actions/checkout@v3
      with:
        clean: false
        ref: gh-pages

    - name: Overwrite file and commmit
      run: |
          mv index.html.uncommitted index.html
          git config user.name "HexDoc Bot"
          git config user.email "noreply@github.com"
          git add index.html
          git diff-index --quiet HEAD || git commit -m "Update web book from $GITHUB_REF"

    - name: Upload changes
      run: git push