Copperline/.github/workflows/linux-present.yml at main · LinuxJedi/Copperline · GitHub

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name: Linux present

# Verifies Copperline's presentation path initializes and renders a frame on
# Linux using software Vulkan (Mesa lavapipe) under a headless X server. Guards
# the "Vulkan required on Linux" policy in src/video/window.rs: wgpu's GL
# fallback drops to an unusable surfaceless EGL platform, so a Vulkan adapter
# (hardware or lavapipe) must be reachable for the window surface to come up.
# GitHub runners have no GPU, so this exercises the lavapipe path -- the same
# one a Vulkan-less host uses after installing a software ICD. The local
# equivalent for an Apple Silicon dev host is packaging/test-linux-vulkan/.
on:
  push:
    branches: [main]
    paths:
      - "src/video/**"
      - "vendor/**"
      - "Cargo.lock"
      - "Cargo.toml"
      - ".github/workflows/linux-present.yml"
  pull_request:
    paths:
      - "src/video/**"
      - "vendor/**"
      - "Cargo.lock"
      - "Cargo.toml"
      - ".github/workflows/linux-present.yml"

concurrency:
  group: linux-present-${{ github.ref }}
  cancel-in-progress: true

jobs:
  present-smoke:
    name: Vulkan present smoke test
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: dtolnay/rust-toolchain@stable
      - name: Install dependencies
        # Build: ALSA (cpal) + udev (gilrs). Runtime: software Vulkan (Mesa
        # lavapipe) + a virtual X server, plus the X11/xkb client libraries
        # winit dlopens at startup (libxkbcommon-x11 in particular, which the
        # runner image does not ship). CI runners have no GPU, so lavapipe is
        # the only ICD present. Keep this list in sync with
        # packaging/test-linux-vulkan/Dockerfile.
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends \
            libasound2-dev libudev-dev \
            mesa-vulkan-drivers vulkan-tools \
            xvfb xauth \
            libxkbcommon0 libxkbcommon-x11-0 \
            libx11-6 libx11-xcb1 libxcb1 \
            libxcursor1 libxi6 libxrandr2 libxrender1 \
            libwayland-client0
      - name: Show Vulkan driver
        run: vulkaninfo --summary | head -n 25
      - name: Build
        run: cargo build --release --locked --bin copperline
      - name: Headless screenshot (exercises Vulkan present init)
        # A hidden window + present surface are still created in screenshot
        # mode, so a non-empty PNG proves the wgpu instance/adapter/surface
        # came up on Vulkan. Boots the bundled AROS ROM, so no assets needed.
        run: |
          xvfb-run -a -s "-screen 0 1280x720x24" \
            ./target/release/copperline --noaudio --screenshot-after 3 /tmp/present.png
          test -s /tmp/present.png
          echo "present path OK ($(stat -c %s /tmp/present.png) bytes)"