GitHub Action to validate Helm charts

helm_chart_validate.yml

name: Validate Helm chart

on:
  push:
    branches: [ main, master ]
  pull_request:

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Check if the Helm chart has changed
        uses: dorny/paths-filter@v2
        id: filter
        with:
          filters: |
            chart:
              - 'chart/**'
            templates:
              - 'chart/templates/*'
      - name: Copy environment-specific values for linting
        if: steps.filter.outputs.chart == 'true'
        run: cd chart/values; for i in *.yaml; do cp -v "${i}" "../ci/${i%.*}-values.${i##*.}"; done
      - name: Set up chart-testing
        if: steps.filter.outputs.chart == 'true'
        uses: helm/chart-testing-action@v2.3.1
      - name: Lint Helm chart with chart-testing
        if: steps.filter.outputs.chart == 'true'
        run: ct lint --charts k8s
      - name: Scan Helm chart with kube-linter
        if: steps.filter.outputs.templates == 'true'
        uses: stackrox/kube-linter-action@v1.0.4
        id: kube-linter-action-scan
        with:
          directory: k8s
          config: .kube-linter/config.yaml
          format: plain