---
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: 2026 The Linux Foundation

name: Lint and Test Charts
description: "Lint and test Helm charts"

inputs:
  target-branch:
    description: "Target branch to compare against for detecting changed charts"
    required: true

runs:
  using: "composite"
  steps:
    - name: Checkout
      uses: actions/checkout@v5
      with:
        fetch-depth: 0

    - name: Set up Helm
      uses: azure/setup-helm@v4.3.1

    - uses: actions/setup-python@v6.0.0
      with:
        python-version: "3.x"
        check-latest: true

    - name: Set up chart-testing
      uses: helm/chart-testing-action@v2.8.0

    - name: Run chart-testing (list-changed)
      id: list-changed
      shell: bash
      run: |
        changed=$(ct list-changed --target-branch ${{ inputs.target-branch }})
        if [[ -n "$changed" ]]; then
          echo "changed=true" >> "$GITHUB_OUTPUT"
        fi

    - name: Run chart-testing (lint)
      if: steps.list-changed.outputs.changed == 'true'
      shell: bash
      run: ct lint --target-branch ${{ inputs.target-branch }}

    - name: Create kind cluster
      if: steps.list-changed.outputs.changed == 'true'
      uses: helm/kind-action@v1.12.0

    - name: Run chart-testing (install)
      if: steps.list-changed.outputs.changed == 'true'
      shell: bash
      run: ct install --target-branch ${{ inputs.target-branch }}