publish.yml

name: Release Charts

on:
  push:
    tags:
      # Semantic versioning; must be equal to version in Chart.yaml
      - "v[0-9]+.[0-9]+.[0-9]+"

jobs:
  publish:
    name: Publish Helm chart
    if: github.repository == 'logicalclocks/rondb-helm'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
    - name: Checkout main repo
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - run: |
        echo "GH ref:       ${{ github.ref }}"
        echo "GH ref_name:  ${{ github.ref_name }}"

    - name: Only allow main branch to publish
      run: |
        branch=$(git branch -r --contains ${{ github.ref }} --format "%(refname:lstrip=3)")
        echo "Current branch: $branch"
        # Exit if branch is not main
        if [ "$branch" != "main" ]; then
          echo "Branch is not main, exiting"
          exit 1
        fi

    - name: Check that Git tag matches Chart.yaml version
      run: |
        TAG=$(echo ${{ github.ref_name }} | sed 's/v//')
        CHART_VERSION=$(grep '^version:' Chart.yaml | awk '{print $2}')
        if [ "$TAG" != "$CHART_VERSION" ]; then
          echo "Tag $TAG does not match Chart.yaml version $CHART_VERSION"
          exit 1
        fi

    - name: Set up Helm
      uses: azure/setup-helm@v4
      with:
          version: '3.13.3'
      env:
        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

    - name: Configure Git
      run: |
        git config user.name "$GITHUB_ACTOR"
        git config user.email "$GITHUB_ACTOR@users.noreply.github.com"

    - name: Package Helm Charts
      run: helm package . --destination ./charts/

    # This will fail if the Helm package already exists; But Git tags can't
    # be duplicated anyways and a release shouldn't be overwritten either.
    - name: Checkout gh-pages branch
      run: |
        git fetch origin gh-pages
        git checkout gh-pages

    - name: Generate index.yaml corresponding to the existing charts
      run: helm repo index . --url https://logicalclocks.github.io/rondb-helm/

    - name: Commit and Push to gh-pages
      run: |
        git add ./charts/*
        git add index.yaml
        git commit -m "Release RonDB Helm chart ${{ github.ref_name }}"
        git push origin gh-pages
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}