Waybar/.github/workflows/smoke.yml

name: smoke

# Launch the real Waybar binary (built with AddressSanitizer) inside a headless
# compositor and exercise it: render, per-module matrix, pointer interaction,
# accessibility-tree assertions, and a layout matrix. Complements the unit
# tests and build jobs, which never actually run the bar.

on:
  push:
    branches: [master]
  pull_request:
  workflow_dispatch:
    inputs:
      bless:
        description: "Regenerate and commit the golden reference screenshot"
        type: boolean
        default: false

permissions:
  contents: write

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

env:
  WAYBAR_BIN: ${{ github.workspace }}/build/waybar

jobs:
  smoke:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install --no-install-recommends -y \
            sway labwc grim imagemagick fonts-dejavu-core jq \
            at-spi2-core python3-pyatspi dbus-x11 \
            meson ninja-build g++ pkg-config scdoc wayland-protocols \
            gobject-introspection libdbusmenu-gtk3-dev libevdev-dev libfmt-dev \
            libgirepository1.0-dev libgtk-3-dev libgtkmm-3.0-dev libinput-dev \
            libjsoncpp-dev libmpdclient-dev libnl-3-dev libnl-genl-3-dev \
            libpulse-dev libsigc++-2.0-dev libspdlog-dev libwayland-dev \
            upower libxkbregistry-dev libxkbcommon-dev

      - name: Build Waybar with AddressSanitizer
        run: |
          meson setup build -Dman-pages=disabled -Db_sanitize=address
          ninja -C build

      # --- Tier 0 + 2: render + sanitizer/critical gate ---
      - name: Render deterministic config
        run: ./test/smoke/run.sh test/smoke/config.jsonc test/smoke/style.css bar.png

      - name: Check the bar is not blank
        run: |
          sd=$(convert bar.png -crop 1920x30+0+0 +repage -colorspace Gray \
                 -format '%[fx:standard_deviation]' info:)
          echo "bar strip stddev = $sd"
          awk "BEGIN{ exit !($sd > 0.01) }" || { echo "::error::bar looks blank"; exit 1; }

      # --- Manual re-bless of the reference image ---
      - name: Bless reference screenshot
        if: github.event_name == 'workflow_dispatch' && inputs.bless
        run: |
          cp bar.png test/smoke/reference.png
          git config user.name  "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add test/smoke/reference.png
          git commit -m "ci(smoke): re-bless reference screenshot [skip ci]"
          git push

      - name: Golden comparison
        run: |
          if [ -f test/smoke/reference.png ]; then
            ae=$(compare -metric AE -fuzz 8% test/smoke/reference.png bar.png diff.png 2>&1 || true)
            ae=$(printf '%s' "$ae" | grep -oE '^[0-9]+' || echo 0)
            echo "differing pixels (fuzz 8%): $ae"
            [ "$ae" -gt 800 ] && { echo "::error::visual regression: $ae px (see diff.png artifact)"; exit 1; } || echo "✓ within tolerance"
          else
            echo "::warning::No reference image; run this workflow via 'Run workflow' with bless=true to create it."
          fi

      # --- Tier 1: per-module matrix ---
      - name: Per-module render matrix
        run: ./test/smoke/modules.sh module-shots

      # --- Tier 2: pointer interaction (best-effort) ---
      # Headless seats may not expose a pointer capability, so injected clicks
      # can be dropped; keep this non-blocking while it is hardened.
      - name: Interaction (click + format-alt)
        continue-on-error: true
        run: ./test/smoke/interact.sh interaction-shots

      # --- Tier 2: accessibility assertions ---
      - name: Accessibility (AT-SPI) assertions
        run: dbus-run-session -- ./test/smoke/a11y.sh

      # --- Tier 3: layout matrix (positions + HiDPI) ---
      - name: Layout matrix (top/bottom/left + scale 2)
        run: ./test/smoke/positions.sh layout-shots

      # --- Tier 3: second compositor ---
      - name: Launch under labwc
        run: COMPOSITOR=labwc ./test/smoke/run.sh test/smoke/config.jsonc test/smoke/style.css labwc.png

      - name: Upload screenshots & diffs
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: waybar-smoke
          path: |
            bar.png
            diff.png
            labwc.png
            module-shots/
            interaction-shots/
            layout-shots/
          if-no-files-found: warn