helm.yml

name: Helm chart

on:
  push:
    branches:
      - master
    tags:
      - "chart/**/[0-9]+.[0-9]+.[0-9]+"
      - "chart/**/[0-9]+.[0-9]+.[0-9]+-dev.[0-9]+"
  pull_request:

env:
  HELM_PLUGIN_CHARTMUSEUM_PUSH_VERSION: 0.9.0
  HELM_PUSH_REPOSITORY_NAME: chartmuseum
  HELM_VERSION: 3.1.1

jobs:
  helm:
    name: Helm
    runs-on: ubuntu-latest

    steps:
      - name: Check out code
        uses: actions/checkout@v3

      - uses: azure/setup-helm@v3
        with:
          version: ${{ env.HELM_VERSION }}

      - name: Add Helm repositories
        run: |
          helm repo add incubator https://charts.helm.sh/incubator
          helm repo add chartmuseum https://kubernetes-charts.banzaicloud.com

      - name: Update Helm repositories
        run: |
          helm repo update
          helm repo list

      - name: Update Helm dependencies
        run: |
          find -H 'charts/' \
            -maxdepth 2 \
            -name 'Chart.yaml' \
            -execdir helm dependency update \;

      - name: Lint Helm charts
        run: |
          find -H 'charts/.' \
            -maxdepth 2 \
            -name 'Chart.yaml' \
            -printf '%h\n' \
              | xargs helm lint

      - name: Set Git refname
        id: set-git-refname
        run: |
          GIT_REFNAME="$(echo "${{ github.ref }}" | sed -r 's@refs/(heads|pull|tags)/@@g')"

          echo "GIT_REFNAME=${GIT_REFNAME}"
          echo "git_refname=${GIT_REFNAME}" >> $GITHUB_OUTPUT

      - name: Set Helm push enabled
        id: set-helm-push-enabled
        run: |
          HELM_PUSH_ENABLED=""
          if [ "${{ github.event_name }}" == "push" ] && echo "${{ steps.set-git-refname.outputs.git_refname }}" | grep -E -q "^(chart/)?[^/]+/[0-9]+.[0-9]+.[0-9]+(?:-dev.[0-9]+)?"; then
            HELM_PUSH_ENABLED=1
          else
            printf >&2 "Unstable chart (%s) from %s event, chart will not be pushed" "${{ steps.set-git-refname.outputs.git_refname }}" "${{ github.event_name }}"
          fi

          echo "HELM_PUSH_ENABLED=${HELM_PUSH_ENABLED}"
          echo "helm_push_enabled=${HELM_PUSH_ENABLED}" >> $GITHUB_OUTPUT

      - if: ${{ steps.set-helm-push-enabled.outputs.helm_push_enabled == 1 }}
        name: Set chart name
        id: set-chart-name
        run: |
          CHART_NAME="$(echo "${{ steps.set-git-refname.outputs.git_refname }}}" | awk -F '/' '{print $(NF-1)}')"

          echo "CHART_NAME=${CHART_NAME}"
          echo "chart_name=${CHART_NAME}" >> $GITHUB_OUTPUT

      - if: ${{ steps.set-helm-push-enabled.outputs.helm_push_enabled == 1 }}
        name: Package Helm chart
        id: package-chart
        run: |
          HELM_PACKAGE_OUTPUT=$(helm package "${{ github.workspace }}/charts/${{ steps.set-chart-name.outputs.chart_name }}") || exit 1
          HELM_PACKAGE_PATH="${HELM_PACKAGE_OUTPUT##"Successfully packaged chart and saved it to: "}"

          echo "HELM_PACKAGE_PATH=${HELM_PACKAGE_PATH}"
          echo "helm_package_path=${HELM_PACKAGE_PATH}" >> $GITHUB_OUTPUT

      - if: ${{ steps.set-helm-push-enabled.outputs.helm_push_enabled == 1 }}
        name: Check Helm chart version in repository
        run: |
          CHART_PATH="${{ github.workspace }}/charts/${{ steps.set-chart-name.outputs.chart_name }}"
          EXPECTED_CHART_VERSION="$(echo "${{ steps.set-git-refname.outputs.git_refname }}" | awk -F '/' '{print $NF}')" || exit 1
          ACTUAL_CHART_VERSION="$(awk '/version: [0-9]+\.[0-9]+\.[0-9]+/ {print $2}' "${CHART_PATH}/Chart.yaml")" || exit 1
          if [ "${EXPECTED_CHART_VERSION}" != "${ACTUAL_CHART_VERSION}" ]; then
            printf >&2 "chart version mismatches, name: %s, expected version (from tag): %s, actual version (from chart): %s" "${{ steps.set-chart-name.outputs.chart_name }}" "${EXPECTED_CHART_VERSION}" "${ACTUAL_CHART_VERSION}"
            exit 1
          fi
          if helm search repo --regexp "\v${{ env.HELM_PUSH_REPOSITORY_NAME }}/${{ steps.set-chart-name.outputs.chart_name }}\v" --devel --version "${ACTUAL_CHART_VERSION}" --output json | jq --exit-status 'length > 0'; then
              printf >&2 "chart version already exists in the repository, repository: %s, name: %s, version: %s" "${{ env.HELM_PUSH_REPOSITORY_NAME }}" "${{ steps.set-chart-name.outputs.chart_name }}" "${ACTUAL_CHART_VERSION}"
              exit 1
          fi

      - if: ${{ steps.set-helm-push-enabled.outputs.helm_push_enabled == 1 }}
        name: Install Helm ChartMuseum push plugin
        run: helm plugin install "https://github.com/chartmuseum/helm-push.git" --version "${{ env.HELM_PLUGIN_CHARTMUSEUM_PUSH_VERSION }}"

      - if: ${{ steps.set-helm-push-enabled.outputs.helm_push_enabled == 1 }}
        name: Push Helm chart
        env:
          HELM_REPO_PASSWORD: ${{ secrets.HELM_REPO_PASSWORD }}
          HELM_REPO_USERNAME: ${{ secrets.HELM_REPO_USERNAME }}
        run: helm push "${{ steps.package-chart.outputs.helm_package_path }}" "${{ env.HELM_PUSH_REPOSITORY_NAME }}"