ci: ship the Linux build as a self-contained AppImage

The Linux artifact was the bare eglantine binary, which only ran with the
same Qt 6.8 and libraries installed. Package eglantine and eden-cli with
linuxdeploy and its Qt plugin instead (Qt, FFmpeg and the other libraries
bundled; glibc, display libraries, the GPU driver and the Vulkan loader
come from the system), and say so in the release notes.

1 files changed, 32 insertions, 3 deletions

diff --git a/.github/workflows/release-binaries.yml b/.github/workflows/release-binaries.yml
index 1a8083febb..f986f13b23 100644
--- a/.github/workflows/release-binaries.yml
+++ b/.github/workflows/release-binaries.yml
@@ -133,13 +133,42 @@ jobs:
         shell: bash
         run: cmake --build build/release --target yuzu yuzu-cmd --parallel
 
-      - name: Package Linux binary
+      # A self-contained AppImage: linuxdeploy bundles every library the two programs need except
+      # the base system ones (glibc, X11/Wayland client libraries, the GPU driver and Vulkan loader),
+      # and its Qt plugin adds the Qt libraries and platform plugins. Runs on glibc 2.39+ systems.
+      - name: Package Linux AppImage
         if: matrix.platform == 'linux-x86_64'
         shell: bash
         run: |
+          set -euo pipefail
           test -x build/release/bin/eglantine
           test -x build/release/bin/eden-cli
-          tar -C build/release/bin -czf "eglantine-${GITHUB_SHA}-linux-x86_64.tar.gz" eglantine eden-cli
+          # Libraries Qt's xcb platform plugin needs, so linuxdeploy can resolve and bundle them.
+          sudo apt-get install -y --no-install-recommends libxcb-cursor0 libxcb-icccm4 libxcb-image0 \
+            libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-shape0 libxcb-xinerama0 libxcb-xkb1
+          tools="$RUNNER_TEMP/linuxdeploy"
+          mkdir -p "$tools"
+          curl -fsSL -o "$tools/linuxdeploy-x86_64.AppImage" \
+            https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
+          curl -fsSL -o "$tools/linuxdeploy-plugin-qt-x86_64.AppImage" \
+            https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage
+          chmod +x "$tools"/*.AppImage
+          # The desktop file names its icon dev.eglantine.eglantine.
+          icon="$RUNNER_TEMP/dev.eglantine.eglantine.png"
+          cp dist/Eglantine.png "$icon"
+          export APPIMAGE_EXTRACT_AND_RUN=1
+          export QMAKE="$QT_ROOT_DIR/bin/qmake"
+          export LDAI_OUTPUT="eglantine-${GITHUB_SHA}-linux-x86_64.AppImage"
+          export OUTPUT="$LDAI_OUTPUT"
+          "$tools/linuxdeploy-x86_64.AppImage" --appdir AppDir \
+            --executable build/release/bin/eglantine \
+            --executable build/release/bin/eden-cli \
+            --desktop-file dist/dev.eden_emu.eden.desktop \
+            --icon-file "$icon" \
+            --plugin qt \
+            --output appimage
+          test -s "$LDAI_OUTPUT"
+          ls -la "$LDAI_OUTPUT"
 
       - name: Package Windows binary
         if: matrix.platform == 'windows-x86_64'
@@ -193,4 +222,4 @@ jobs:
             --notes "Automatic build of ${GITHUB_REF_NAME} at ${GITHUB_SHA}.
 
           Windows: extract the zip and run eglantine.exe, or eden-cli.exe from a terminal.
-          Linux: extract the tar.gz; it needs Qt 6.8 and the libraries Eglantine is built against installed on the system."
+          Linux: make the AppImage executable (chmod +x) and run it; it bundles its libraries and needs glibc 2.39 or newer (Ubuntu 24.04, Fedora 40, Debian 13, Arch)."