.github/workflows/helm-chart.yml

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# to you under the Apache License, Version 2.0 (the
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#   http://www.apache.org/licenses/LICENSE-2.0
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name: Helm Chart

on:
  workflow_dispatch:
    inputs:
      publish:
        description: "Publish the packaged chart to gh-pages"
        required: true
        default: "false"
        type: choice
        options:
          - "false"
          - "true"

permissions:
  contents: write

concurrency:
  group: helm-chart-publish
  cancel-in-progress: false

env:
  CHART_REPO_URL: https://apache.github.io/druid-operator
  CHART_RELEASE_DIR: helm-releases

jobs:
  publish:
    if: github.repository == 'apache/druid-operator'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          path: source

      - name: Checkout gh-pages
        uses: actions/checkout@v4
        with:
          ref: gh-pages
          path: gh-pages

      - name: Verify Helm
        run: helm version

      - name: Package chart
        run: |
          mkdir -p source/.chart-packages
          helm lint source/chart
          helm package source/chart --destination source/.chart-packages

      - name: Verify chart metadata
        run: |
          package_path="$(find source/.chart-packages -name '*.tgz' -print -quit)"
          test -n "${package_path}"

          tar -tzf "${package_path}" | grep -Eq '^[^/]+/LICENSE$'
          tar -tzf "${package_path}" | grep -Eq '^[^/]+/NOTICE$'

      - name: Update Helm repository index
        if: inputs.publish == 'true'
        run: |
          package_path="$(find source/.chart-packages -name '*.tgz' -print -quit)"
          package_name="$(basename "${package_path}")"
          release_dir="gh-pages/${CHART_RELEASE_DIR}"

          mkdir -p "${release_dir}"

          if [[ -f "${release_dir}/${package_name}" ]]; then
            echo "Chart package ${package_name} already exists on gh-pages."
            exit 1
          fi

          cp "${package_path}" "${release_dir}/"

          if [[ -f gh-pages/index.yaml ]]; then
            helm repo index gh-pages --url "${CHART_REPO_URL}" --merge gh-pages/index.yaml
          else
            helm repo index gh-pages --url "${CHART_REPO_URL}"
          fi

      - name: Publish chart
        if: inputs.publish == 'true'
        run: |
          chart_version="$(helm show chart source/chart | awk '/^version:/ { print $2 }')"

          cd gh-pages
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add index.yaml "${CHART_RELEASE_DIR}"

          if git diff --cached --quiet; then
            echo "No chart changes to publish."
            exit 0
          fi

          git commit -m "Publish druid-operator chart ${chart_version}"
          git push origin HEAD:gh-pages