release.yml

name: Release Charts
on:
  push:
    branches:
      - main
    paths:
      - 'charts/**'
# Only allow 1 release at a time (avoid concurent deployment to gh-pages)
concurrency: "release-chart"
jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

      - name: Install Helm
        uses: azure/setup-helm@fe7b79cd5ee1e45176fcad797de68ecaf3ca4814 # v4.2.0
          
      # Needed for subchart dependencies
      - name: Add jenkins-infra Helm repository
        run: helm repo add jenkins-infra https://jenkins-infra.github.io/helm-charts

      - name: Run chart-releaser
        id: chart_releaser
        uses: helm/chart-releaser-action@a917fd15b20e8b64b94d9158ad54cd6345335584 # v1.6.0
        env:
          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

      - name: Update modified chart release(s)
        id: update_chart_releases
        if: steps.chart_releaser.outputs.changed_charts != ''
        run: |
          # KISS, last commit subject as changelog for every modified chart
          changelog=$(git log --format=%s -n 1)

          # Set IFS to a comma to split the string into an array
          IFS=',' read -ra changedCharts <<< "${{ steps.chart_releaser.outputs.changed_charts }}"

          for chart in "${changedCharts[@]}"; do          
            chartName=$(echo "${chart}" | cut -d '/' -f 2)
            # Retrieve version from Chart.yaml
            version=$(yq '.version' "${chart}/Chart.yaml")

            # Retrive release id and body from tag
            tag="${chartName}-${version}"
            release=$(curl --location --silent --fail --show-error "https://api.github.com/repos/${{ github.repository }}/releases/tags/${tag}")
            releaseId=$(echo "${release}" | jq --raw-output '.id')
            releaseBody=$(echo "${release}" | jq --raw-output '.body')

            # Update release
            newlines="\r\n\r\n"
            body="${releaseBody}${newlines}## Changelog${newlines}${changelog}"
            echo "= release description for ${tag}:"
            echo "${body}"
            curl --silent --fail --show-error --output /dev/null --location \
              -X PATCH \
              --header "Accept: application/vnd.github+json" \
              --header "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              --header "X-GitHub-Api-Version: 2022-11-28" \
              "https://api.github.com/repos/${{ github.repository }}/releases/${releaseId}" \
              --data "{\"body\":\"${body}\"}"
          done