screenshot.yml

name: Screenshot Tests

on:
  push:
    paths:
      - "examples/gallery/**"
      - "download.cr"
  workflow_dispatch:

jobs:
  screenshot:
    name: ${{ matrix.os }} Screenshot
    runs-on: ${{ matrix.runner }}
    strategy:
      matrix:
        include:
          - os: ubuntu
            runner: ubuntu-latest
            setup-display: true
          - os: windows
            runner: windows-latest
            setup-display: false
          - os: macos
            runner: macos-latest
            setup-display: false

    env:
      DISPLAY: ${{ matrix.setup-display && ':99' || '' }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          submodules: true

      - name: Install Crystal
        uses: crystal-lang/install-crystal@v1
        with:
          crystal: latest

      - name: Install Ubuntu dependencies
        if: matrix.os == 'ubuntu'
        run: |
          sudo apt-get update -y
          sudo apt-get install -y libgtk-3-dev xvfb imagemagick xdotool openbox wmctrl

      - name: Setup Windows Developer Command Prompt
        if: matrix.os == 'windows'
        uses: ilammy/msvc-dev-cmd@v1
        with:
          arch: x64

      - name: Install Crystal dependencies
        run: shards install

      - name: Download libui library
        run: |
          crystal run download.cr
          ${{ matrix.os == 'windows' && 'Get-ChildItem libui' || 'ls -la libui/' }}

      - name: Build all gallery (Linux/macOS)
        if: matrix.os != 'windows'
        shell: bash
        run: |
          for f in examples/gallery/*.cr; do
            name=$(basename "$f" .cr)
            crystal build "$f" -o "$name"
          done

      - name: Build all gallery (Windows)
        if: matrix.os == 'windows'
        shell: pwsh
        run: |
          Get-ChildItem examples/gallery/*.cr | ForEach-Object {
            $name = $_.BaseName
            crystal build $_.FullName -o $name
          }

      - name: Generate app-names and output-files
        if: matrix.os != 'windows'
        id: gen_names
        shell: bash
        run: |
          APPS=$(for f in examples/gallery/*.cr; do basename "$f" .cr; done | xargs)
          OUTPUTS=$(for f in examples/gallery/*.cr; do basename "$f" .cr; done | xargs -I{} echo -n "{}-${{ matrix.os }}.png ")
          echo "APP_NAMES=$APPS" >> $GITHUB_ENV
          echo "OUTPUT_FILES=$OUTPUTS" >> $GITHUB_ENV

      - name: Generate app-names and output-files (Windows)
        if: matrix.os == 'windows'
        id: gen_names_win
        shell: pwsh
        run: |
          $apps = (Get-ChildItem examples/gallery/*.cr | ForEach-Object { $_.BaseName }) -join ' '
          $outputs = (Get-ChildItem examples/gallery/*.cr | ForEach-Object { "$($_.BaseName)-${{ matrix.os }}.png" }) -join ' '
          echo "APP_NAMES=$apps" | Out-File -FilePath $env:GITHUB_ENV -Append
          echo "OUTPUT_FILES=$outputs" | Out-File -FilePath $env:GITHUB_ENV -Append

      - name: Take screenshots for all gallery
        uses: ./.github/actions/screenshot
        with:
          os: ${{ matrix.os }}
          app-names: ${{ env.APP_NAMES }}
          output-files: ${{ env.OUTPUT_FILES }}

      - name: Upload screenshots
        uses: actions/upload-artifact@v4
        with:
          name: screenshots-${{ matrix.os }}
          path: "*.png"
          retention-days: 30

  push_screenshots:
    name: Push all screenshots to orphan branch
    needs: screenshot
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          submodules: true

      - name: Prepare orphan branch
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

          # Prepare orphan branch first
          git fetch origin screenshots || true
          git checkout --orphan screenshots || git checkout screenshots

      - name: Download all screenshots artifacts
        uses: actions/download-artifact@v5
        with:
          pattern: screenshots-*
          merge-multiple: true

      - name: Commit screenshots
        run: |
          # Debug: Check downloaded files
          echo "=== Downloaded files ==="
          ls -la

          # Add gallery.md if it exists
          if [ -f gallery.md ]; then
            git add gallery.md
          fi

          # Commit only if PNG files exist
          if ls *.png 1> /dev/null 2>&1; then
            git add *.png
            git status
            if ! git diff --cached --quiet; then
              git commit -m "Update screenshots [skip ci]"
              git push -f origin screenshots
            else
              echo "No changes to commit."
            fi
          else
            echo "No PNG files found to commit."
          fi