action.yml

name: 'Docker Skiko Run'
description: 'Build Docker image locally if needed and run commands inside it'

inputs:
  image_name:
    description: 'Image name (e.g., linux-compat)'
    required: true
  command:
    description: 'Command to run inside the container'
    required: true
  working_directory:
    description: 'Working directory relative to project root (e.g., samples/SkiaAndroidSample)'
    required: false
    default: '.'
  virtual-display:
    description: 'Enable virtual display for UI testing (enables e2e UI interaction tests with real windows)'
    required: false
    default: 'false'
  base_ref:
    description: 'Base ref/sha for change detection (defaults to auto-detect)'
    required: false
    default: ''

runs:
  using: 'composite'
  steps:
    - name: 'Detect Docker changes'
      id: filter
      uses: dorny/paths-filter@v3
      with:
        base: ${{ inputs.base_ref || github.event.pull_request.base.sha || github.event.before || 'master' }}
        filters: |
          docker_changed:
            - '.github/actions/docker-skiko-publish/**'
            - '.github/workflows/docker-publish.yml'
            - 'skiko/docker/${{ inputs.image_name }}/**'

    - name: 'Set Variables'
      id: vars
      shell: bash
      run: |
        IMAGE_NAMESPACE="${GITHUB_REPOSITORY,,}"
        echo "image_namespace=${IMAGE_NAMESPACE}" >> $GITHUB_OUTPUT
        
        # Determine which tag to use
        # github.base_ref is set for PRs regardless of event type (pull_request or workflow_call)
        if [[ -n "${{ github.base_ref }}" && "${{ steps.filter.outputs.docker_changed }}" != "true" ]]; then
          # For PRs without docker changes, use base branch tag (pre-built image)
          TAG="${{ github.base_ref }}"
        else
          # For PRs with docker changes or non-PRs, use current branch tag
          TAG="${GITHUB_REF_NAME}"
        fi
        TAG="${TAG//\//-}"
        
        # Try to pull image from GHCR
        # This checks both if the image exists in the registry and loads it into the local daemon
        if docker pull "ghcr.io/${IMAGE_NAMESPACE}/${{ inputs.image_name }}:${TAG}" >/dev/null 2>&1; then
          IMAGE_EXISTS="true"
        else
          IMAGE_EXISTS="false"
        fi
        
        echo "tag=${TAG}" >> $GITHUB_OUTPUT
        echo "image_exists=${IMAGE_EXISTS}" >> $GITHUB_OUTPUT

    - name: 'Build Docker image locally (if needed)'
      if: steps.filter.outputs.docker_changed == 'true' || steps.vars.outputs.image_exists == 'false'
      uses: ./.github/actions/docker-skiko-publish
      with:
        image_name: ${{ inputs.image_name }}
        tag: ${{ steps.vars.outputs.tag }}
        load: true
        should_publish: false

    - name: 'Prepare command'
      id: cmd
      shell: bash
      run: |
        CMD="${{ inputs.command }}"
        if [[ "${{ inputs.virtual-display }}" == "true" ]]; then
          CMD="Xvfb :1 -screen 0 1920x1080x24 -extension RANDR +extension GLX & export DISPLAY=:1.0 && ${CMD}"
        fi
        {
          echo "command<<EOF"
          echo "${CMD}"
          echo "EOF"
        } >> $GITHUB_OUTPUT

    - name: 'Run command in container'
      shell: bash
      run: |
        docker run --rm \
          -v "${{ github.workspace }}":/workspace \
          -v "${HOME}/.gradle":/gradle-cache \
          -e GRADLE_USER_HOME=/gradle-cache \
          -w /workspace/${{ inputs.working_directory }} \
          "ghcr.io/${{ steps.vars.outputs.image_namespace }}/${{ inputs.image_name }}:${{ steps.vars.outputs.tag }}" \
          bash -c '${{ steps.cmd.outputs.command }}'