Extend native Switch2Kit controller support to desktop platforms

.github/workflows/switch2kit-desktop.yml

@@ -0,0 +1,41 @@
+name: Switch2Kit desktop platforms
+on:
+  pull_request:
+  workflow_dispatch:
+permissions:
+  contents: read
+concurrency:
+  group: switch2kit-desktop-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  source:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          persist-credentials: false
+      - run: git submodule update --init dependencies/Switch2Kit
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          repository: libsdl-org/SDL
+          ref: f87239e71e42da91ca317a12eefb82cfbf3393eb
+          path: test-sdl
+          persist-credentials: false
+      - name: Archive the exact sources used by the controller integration
+        run: |
+          mkdir -p "$RUNNER_TEMP/switch2kit-source"
+          git archive HEAD -o "$RUNNER_TEMP/switch2kit-source/host.zip"
+          git -C dependencies/Switch2Kit archive HEAD -o "$RUNNER_TEMP/switch2kit-source/sdk.zip"
+          git -C test-sdl archive HEAD -o "$RUNNER_TEMP/switch2kit-source/sdl.zip"
+          {
+            git rev-parse HEAD
+            git submodule status dependencies/Switch2Kit
+            git -C test-sdl rev-parse HEAD
+          } > "$RUNNER_TEMP/switch2kit-source/revisions.txt"
+      - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+        with:
+          name: Switch2Kit-desktop-source
+          path: ${{ runner.temp }}/switch2kit-source
+          retention-days: 7
+          if-no-files-found: error

.github/workflows/switch2kit-linux.yml

@@ -0,0 +1,77 @@
+name: Switch2Kit Linux application
+on:
+  pull_request:
+  workflow_dispatch:
+permissions:
+  contents: read
+concurrency:
+  group: switch2kit-linux-${{ github.ref }}
+  cancel-in-progress: false
+jobs:
+  linux:
+    runs-on: ubuntu-24.04
+    container: swift:6.2.1-noble
+    timeout-minutes: 120
+    env:
+      DEBIAN_FRONTEND: noninteractive
+      VCPKG_MAX_CONCURRENCY: 3
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          persist-credentials: false
+          submodules: recursive
+      - name: Install native dependencies
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends build-essential cmake ninja-build python3 pkg-config curl zip unzip tar zstd nasm autoconf automake libtool libtool-bin gettext freeglut3-dev libgcrypt20-dev libglm-dev libgtk-3-dev libpulse-dev libsecret-1-dev libsystemd-dev libudev-dev libbluetooth-dev libgl1-mesa-dev libglu1-mesa-dev libx11-xcb-dev libwayland-dev wayland-protocols extra-cmake-modules dbus xvfb xauth openbox wmctrl x11-utils
+          git config --global --add safe.directory "$PWD"
+          mkdir -p "$HOME/.cache/vcpkg/archives"
+          echo "VCPKG_BINARY_SOURCES=clear;files,$HOME/.cache/vcpkg/archives,readwrite" >> "$GITHUB_ENV"
+      - uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809
+        with:
+          path: ~/.cache/vcpkg/archives
+          key: switch2kit-cemu-linux-${{ hashFiles('vcpkg.json', 'vcpkg-configuration.json', 'dependencies/vcpkg_overlay_ports*/**') }}
+          restore-keys: switch2kit-cemu-linux-
+      - name: Build and install the controller-enabled application
+        shell: bash
+        run: |
+          set -o pipefail
+          bash scripts/build-switch2kit.sh 2>&1 | tee linux-build.log
+      - name: Execute controller policies
+        shell: bash
+        run: |
+          set -o pipefail
+          python3 tests/switch2kit/run.py --sanitize 2>&1 | tee linux-policies.log
+      - name: Relocate, resolve native dependencies and launch the installed binary
+        shell: bash
+        run: |
+          set -euo pipefail
+          mv build-switch2kit/install "$RUNNER_TEMP/Cemu-Switch2Kit-linux-x86_64"
+          app="$RUNNER_TEMP/Cemu-Switch2Kit-linux-x86_64"
+          mv build-switch2kit "$RUNNER_TEMP/disabled-build-tree"
+          test -n "$(find "$app" -name libSwitch2KitC.so -print -quit)"
+          ldd "$app/bin/Cemu_release" | tee linux-dependencies.log
+          ! grep -q 'not found' linux-dependencies.log
+          grep -F "$app" linux-dependencies.log | grep libSwitch2KitC
+          tar -C "$RUNNER_TEMP" -czf Cemu-Switch2Kit-linux-x86_64.tar.gz Cemu-Switch2Kit-linux-x86_64
+          mv "$app" "$RUNNER_TEMP/unavailable-staged-application"
+          dbus-run-session -- xvfb-run -a python3 dependencies/Switch2Kit/tests/emulator-launch/linux.py cemu \
+            "$PWD/Cemu-Switch2Kit-linux-x86_64.tar.gz" --report "$PWD/linux-launch.json" \
+            --forbidden-root "$PWD" --forbidden-root "$RUNNER_TEMP/disabled-build-tree" \
+            --forbidden-root "$RUNNER_TEMP/unavailable-staged-application"
+      - name: Controller-enabled development build
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+        with:
+          name: Cemu-Switch2Kit-linux-x86_64
+          path: Cemu-Switch2Kit-linux-x86_64.tar.gz
+          retention-days: 14
+          if-no-files-found: error
+      - name: Native diagnostics
+        if: always()
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+        with:
+          name: Cemu-Switch2Kit-linux-diagnostics
+          path: |
+            linux-*.log
+            linux-launch.json
+          retention-days: 7

.github/workflows/switch2kit-windows.yml

@@ -0,0 +1,68 @@
+name: Switch2Kit Windows application
+on:
+  pull_request:
+  workflow_dispatch:
+permissions:
+  contents: read
+concurrency:
+  group: switch2kit-windows-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  windows:
+    runs-on: windows-2022
+    timeout-minutes: 120
+    env:
+      VCPKG_MAX_CONCURRENCY: 3
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
+        with:
+          persist-credentials: false
+          submodules: recursive
+      - uses: compnerd/gha-setup-swift@397094e75494a93fa8d81db0268dbc8f5d6cf7c6
+        with:
+          swift-version: swift-6.2.1-release
+          swift-build: 6.2.1-RELEASE
+      - name: Build the complete controller-enabled application
+        shell: pwsh
+        run: |
+          & ./scripts/build-switch2kit.ps1 2>&1 | Tee-Object windows-build.log
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+          # The build helper initialized MSVC in this PowerShell process.
+          python tests/switch2kit/test_host_file.py 2>&1 | Tee-Object windows-host-file.log
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+      - name: Stage and launch the application away from the build tree
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $stage = Join-Path $env:RUNNER_TEMP 'Cemu-Switch2Kit-windows-x86_64'
+          New-Item -ItemType Directory -Path $stage | Out-Null
+          # Robocopy follows directory junctions and copies linked resources.
+          robocopy 'bin' $stage /E /NFL /NDL /NJH /NJS
+          if ($LASTEXITCODE -ge 8) { throw 'Application staging failed.' }
+          $global:LASTEXITCODE = 0
+          # Never distribute a developer/test profile. The supervisor seeds only
+          # its private extracted copy, after the distributable archive is made.
+          foreach ($profile in @('User', 'user', 'portable', 'portable.txt', 'settings.xml')) {
+            if (Test-Path (Join-Path $stage $profile)) { throw "Unexpected profile in application staging: $profile" }
+          }
+          Move-Item build-switch2kit-windows "$env:RUNNER_TEMP/disabled-build-tree"
+          Compress-Archive -Path $stage -DestinationPath 'Cemu-Switch2Kit-windows-x86_64.zip'
+          Move-Item $stage "$env:RUNNER_TEMP/unavailable-staged-application"
+          & ./tests/switch2kit/windows-launch.ps1 -Archive 'Cemu-Switch2Kit-windows-x86_64.zip' -ForbiddenRoot "$PWD"
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+      - name: Controller-enabled development application
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+        with:
+          name: Cemu-Switch2Kit-windows-x86_64
+          path: Cemu-Switch2Kit-windows-x86_64.zip
+          retention-days: 14
+          if-no-files-found: error
+      - name: Native diagnostics
+        if: always()
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+        with:
+          name: Cemu-Switch2Kit-windows-diagnostics
+          path: |
+            windows-*.log
+            windows-launch.json
+          retention-days: 7

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.21.1)
 
 option(ENABLE_VCPKG "Enable the vcpkg package manager" ON)
-option(ENABLE_SWITCH2KIT "Use in-process Switch2Kit controllers on macOS 15+" OFF)
+option(ENABLE_SWITCH2KIT "Use in-process Switch2Kit controllers" OFF)
 set(SWITCH2KIT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/dependencies/Switch2Kit" CACHE PATH "Switch2Kit source checkout")
 option(MACOS_BUNDLE "The executable when built on macOS will be created as an application bundle" OFF)
 option(ALLOW_PORTABLE "Allow Cemu to be run in portable mode" ON)
@@ -173,11 +173,14 @@ if(ENABLE_SDL)
 endif()
 
 if(ENABLE_SWITCH2KIT)
-    if(NOT APPLE OR NOT ENABLE_SDL OR NOT MACOS_BUNDLE)
-        message(FATAL_ERROR "Switch2Kit requires macOS, ENABLE_SDL and MACOS_BUNDLE")
+    if(NOT (APPLE OR WIN32 OR CMAKE_SYSTEM_NAME STREQUAL "Linux"))
+        message(FATAL_ERROR "Switch2Kit requires a macOS, Windows or Linux desktop host")
     endif()
-    if(CMAKE_OSX_DEPLOYMENT_TARGET VERSION_LESS 15.0)
-        message(FATAL_ERROR "Switch2Kit requires CMAKE_OSX_DEPLOYMENT_TARGET=15.0 or newer")
+    if(NOT ENABLE_SDL)
+        message(FATAL_ERROR "Switch2Kit requires ENABLE_SDL")
+    endif()
+    if(APPLE AND (NOT MACOS_BUNDLE OR CMAKE_OSX_DEPLOYMENT_TARGET VERSION_LESS 15.0))
+        message(FATAL_ERROR "Switch2Kit on macOS requires MACOS_BUNDLE and CMAKE_OSX_DEPLOYMENT_TARGET=15.0 or newer")
     endif()
     if(NOT EXISTS "${SWITCH2KIT_SOURCE_DIR}/Integrations/SDL3/CMakeLists.txt")
         message(FATAL_ERROR "Switch2Kit is missing. Run git submodule update --init --recursive")
@@ -289,3 +292,10 @@ if (NOT ZArchive_FOUND)
 endif()
 
 add_subdirectory(src)
+
+if(ENABLE_SWITCH2KIT AND CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    include(GNUInstallDirs)
+    switch2kit_install_linux(CemuBin)
+    install(TARGETS CemuBin RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+    install(DIRECTORY bin/gameProfiles bin/resources DESTINATION "${CMAKE_INSTALL_DATADIR}/Cemu")
+endif()