name: Helm lint

on:
  workflow_call:
    inputs:
      chart-directory:
        description: |
          Root directory of the Helm chart.
          Example: `charts/my-app`.
        type: string
        default: '.'
      helm-version:
        description: |
          Helm version to install.
          Example: `v3.14.0`. Defaults to `latest`.
        type: string
        default: 'latest'
      runs-on:
        description: 'Runner label to use for the job.'
        type: string
        default: 'ubuntu-latest'

jobs:
  lint:
    name: Lint Helm chart
    runs-on: ${{ inputs.runs-on }}
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Setup Helm
        uses: azure/setup-helm@dda3372f752e03dde6b3237bc9431cdc2f7a02a2 # v5.0.0
        with:
          version: ${{ inputs.helm-version }}

      - name: Update Helm dependencies
        run: |
          if grep -q '^dependencies:' "${{ inputs.chart-directory }}/Chart.yaml" 2>/dev/null; then
            helm dependency update "${{ inputs.chart-directory }}"
          fi

      - name: Helm lint
        run: helm lint "${{ inputs.chart-directory }}"

      - name: Helm template (dry-run)
        run: helm template test-release "${{ inputs.chart-directory }}" --debug > /dev/null