name: Build documentation

on:
  push:
    branches: [main]

    # Only trigger workflow when documentation files are changed
    paths:
      - 'docs/**'
      - 'mkdocs.yml'
      - '.github/workflows/docs.yml'

# Prevent this workflow from running concurrently with the helm-release.yml workflow
concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  docs:
    runs-on: ubuntu-latest

    permissions:
      pages: write
      id-token: write

    environment:
      name: github-pages

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Python virtualenv
        run: |
          pip install --upgrade pip
          python -m venv env
          source env/bin/activate
          pip install -r docs/requirements.txt

      - name: Build documentation
        run: |
          source env/bin/activate
          mkdocs build

      - name: Add existing Helm repository index.yml file
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          PAGES_URL=$(gh api \
            -H "Accept: application/vnd.github+json" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            /repos/${{ github.repository }}/pages \
            | jq -r '.html_url')

          if [[ "$PAGES_URL" != "null" ]]; then
            HTTP_STATUS=$(curl -sL -w '%{http_code}' "${PAGES_URL%/}/index.yaml" -o site/index.yaml)
            if [[ "$HTTP_STATUS" != "200" ]]; then
              rm site/index.yaml
            fi
          fi

      - name: Setup Github pages
        uses: actions/configure-pages@v4

      - name: Create Github pages artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: site

      - name: Deploy documentation to Github pages
        uses: actions/deploy-pages@v4