GHA: Use MinGW on Ubuntu runner for Windows builds

.github/actions/build-dotnet-assemblies/action.yml

@@ -8,6 +8,9 @@ inputs:
       - linuxbsd
       - windows
       - macos
+  bin:
+    required: true
+    type: string
 
 runs:
   using: "composite"
@@ -22,7 +25,7 @@ runs:
     - name: Generate C# glue
       shell: bash
       run: |
-        ./bin/${BIN} --headless --generate-mono-glue ./modules/mono/glue || true
+        ./bin/${{inputs.bin}} --headless --generate-mono-glue ./modules/mono/glue || true
 
     - name: Build .NET assemblies
       shell: bash

.github/actions/setup-mingw-ubuntu/action.yml

@@ -0,0 +1,34 @@
+name: Setup MinGW on Ubuntu
+
+inputs:
+  arch:
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Set up MinGW for x86_64
+      if: inputs.arch == 'x86_64'
+      shell: bash
+      run: |
+        sudo apt-get install gcc-mingw-w64 g++-mingw-w64-x86-64
+        sudo update-alternatives --set x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-gcc-posix
+        sudo update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix
+
+    - name: Set up MinGW for x86_32
+      if: inputs.arch == 'x86_32'
+      shell: bash
+      run: |
+        sudo apt-get install gcc-mingw-w64 g++-mingw-w64-i686
+        sudo update-alternatives --set i686-w64-mingw32-gcc /usr/bin/i686-w64-mingw32-gcc-posix
+        sudo update-alternatives --set i686-w64-mingw32-g++ /usr/bin/i686-w64-mingw32-g++-posix
+
+    - name: Set up LLVM MinGW for arm64
+      if: inputs.arch == 'arm64'
+      shell: bash
+      run: |
+        curl -LO https://github.com/mstorsjo/llvm-mingw/releases/download/20240619/llvm-mingw-20240619-ucrt-ubuntu-20.04-x86_64.tar.xz
+        tar xf llvm-mingw-20240619-ucrt-ubuntu-20.04-x86_64.tar.xz
+        rm -f llvm-mingw-20240619-ucrt-ubuntu-20.04-x86_64.tar.xz
+        mv -f llvm-mingw-20240619-ucrt-ubuntu-20.04-x86_64 llvm-mingw
+        echo "MINGW_PREFIX=${GITHUB_WORKSPACE}/llvm-mingw" >> "$GITHUB_ENV"

.github/workflows/linux.yml

@@ -248,6 +248,7 @@ jobs:
         uses: ./modules/limboai/.github/actions/build-dotnet-assemblies
         with:
           platform: linuxbsd
+          bin: ${{env.BIN}}
 
       - name: Prepare artifact
         env:

.github/workflows/macos.yml

@@ -195,6 +195,7 @@ jobs:
         uses: ./modules/limboai/.github/actions/build-dotnet-assemblies
         with:
           platform: macos
+          bin: ${{env.BIN}}
 
       - name: Prepare artifact
         run: |

.github/workflows/windows.yml

@@ -34,13 +34,13 @@ on:
 env:
   SCONS_CACHE_MSVC_CONFIG: true
   SCONS_CACHE_LIMIT: 4096
-  SCONSFLAGS: production=yes tests=no verbose=yes warnings=extra werror=yes
+  SCONSFLAGS: production=yes use_mingw=yes verbose=yes warnings=no progress=no
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: true
 
 jobs:
   windows-builds:
-    runs-on: "windows-latest"
+    runs-on: "ubuntu-20.04"
     name: ${{ matrix.opts.name }}
     strategy:
       fail-fast: false
@@ -51,18 +51,21 @@ jobs:
           - name: Editor (x86_64, release)
             target: editor
             arch: x86_64
+            llvm: false
             dotnet: false
             should-build: true
 
           - name: Template (x86_64, release)
             target: template_release
             arch: x86_64
+            llvm: false
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
           - name: Template (x86_64, debug)
             target: template_debug
             arch: x86_64
+            llvm: false
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
@@ -71,18 +74,21 @@ jobs:
           # - name: Editor (x86_32, release)
           #   target: editor
           #   arch: x86_32
+          #   llvm: false
           #   dotnet: false
           # should-build: ${{ !inputs.test-build }}
 
           - name: Template (x86_32, release)
             target: template_release
             arch: x86_32
+            llvm: false
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
           - name: Template (x86_32, debug)
             target: template_debug
             arch: x86_32
+            llvm: false
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
@@ -91,18 +97,21 @@ jobs:
           # - name: Editor (arm64, release)
           #   target: editor
           #   arch: arm64
+          #   llvm: true
           #   dotnet: false
           #   should-build: ${{ !inputs.test-build }}
 
           - name: Template (arm64, release)
             target: template_release
             arch: arm64
+            llvm: true
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
           - name: Template (arm64, debug)
             target: template_debug
             arch: arm64
+            llvm: true
             dotnet: false
             should-build: ${{ !inputs.test-build }}
 
@@ -111,18 +120,21 @@ jobs:
           - name: Editor .NET (x86_64, release)
             target: editor
             arch: x86_64
+            llvm: false
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
           - name: Template .NET (x86_64, release)
             target: template_release
             arch: x86_64
+            llvm: false
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
           - name: Template .NET (x86_64, debug)
             target: template_debug
             arch: x86_64
+            llvm: false
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
@@ -131,38 +143,44 @@ jobs:
           # - name: Editor .NET (x86_32, release)
           #   target: editor
           #   arch: x86_32
+          #   llvm: false
           #   dotnet: true
           # should-build: ${{ !inputs.test-build }}
 
           - name: Template .NET (x86_32, release)
             target: template_release
             arch: x86_32
+            llvm: false
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
           - name: Template .NET (x86_32, debug)
             target: template_debug
             arch: x86_32
+            llvm: false
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
             # * .NET arm64
 
-          # - name: Editor (arm64, release)
+          # - name: Editor .NET (arm64, release)
           #   target: editor
           #   arch: arm64
+          #   llvm: true
           #   dotnet: true
           #   should-build: ${{ !inputs.test-build }}
 
-          - name: Template (arm64, release)
+          - name: Template .NET (arm64, release)
             target: template_release
             arch: arm64
+            llvm: true
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
-          - name: Template (arm64, debug)
+          - name: Template .NET (arm64, debug)
             target: template_debug
             arch: arm64
+            llvm: true
             dotnet: true
             should-build: ${{ !inputs.test-build }}
 
@@ -170,7 +188,7 @@ jobs:
           - { opts: { should-build: false } }
 
     env:
-      BIN: godot.windows.${{matrix.opts.target}}.${{matrix.opts.arch}}${{  matrix.opts.dotnet == true && '.mono' || ''  }}
+      BIN: godot.windows.${{matrix.opts.target}}.${{matrix.opts.arch}}${{matrix.opts.llvm && '.llvm' || ''}}${{matrix.opts.dotnet == true && '.mono' || ''}}
 
     steps:
       - name: Clone Godot
@@ -188,21 +206,15 @@ jobs:
       # Inits GODOT_VERSION, LIMBOAI_VERSION and NAME_PREFIX environment variables.
       - uses: ./modules/limboai/.github/actions/init-version
 
-      - name: Set up Python 3.x
-        uses: actions/setup-python@v5
+      - name: Set up Linux toolchain
+        uses: ./modules/limboai/.github/actions/setup-linux-toolchain
         with:
-          python-version: "3.x"
-          architecture: "x64"
+          arch: ${{matrix.opts.arch}}
 
-      - name: Set up scons
-        run: |
-          python -c "import sys; print(sys.version)"
-          python -m pip install scons==4.4.0
-          python --version
-          scons --version
-
-      - name: Set up MSVC problem matcher
-        uses: ammaraskar/msvc-problem-matcher@master
+      - name: Set up MinGW
+        uses: ./modules/limboai/.github/actions/setup-mingw-ubuntu
+        with:
+          arch: ${{matrix.opts.arch}}
 
       - name: Set up scons cache
         uses: actions/cache@v4
@@ -218,13 +230,8 @@ jobs:
         env:
           SCONS_CACHE: ${{github.workspace}}/.scons_cache/
         run: |
-          scons -j2 platform=windows target=${{matrix.opts.target}} arch=${{matrix.opts.arch}} module_mono_enabled=${{matrix.opts.dotnet}} ${{env.SCONSFLAGS}}
-
-      - name: Build .NET assemblies
-        if: matrix.opts.dotnet && matrix.opts.target == 'editor'
-        uses: ./modules/limboai/.github/actions/build-dotnet-assemblies
-        with:
-          platform: windows
+          PATH=${GITHUB_WORKSPACE}/buildroot/bin:$PATH
+          scons platform=windows target=${{matrix.opts.target}} arch=${{matrix.opts.arch}} use_llvm=${{matrix.opts.llvm}} module_mono_enabled=${{matrix.opts.dotnet}} ${{env.SCONSFLAGS}}
 
       - name: Prepare artifact
         shell: bash
@@ -252,3 +259,64 @@ jobs:
         with:
           name: ${{env.NAME_PREFIX}}${{matrix.opts.dotnet == true && '.dotnet' || ''}}.${{matrix.opts.target}}.windows.${{matrix.opts.arch}}
           path: out/*
+
+  dotnet-assemblies:
+    runs-on: "windows-latest"
+    name: Build .NET assemblies
+    needs: windows-builds
+    strategy:
+      fail-fast: false
+      matrix:
+        opts:
+          - name: Editor .NET (x86_64, release)
+            target: editor
+            arch: x86_64
+            llvm: false
+            dotnet: true
+            should-build: ${{ !inputs.test-build }}
+
+        exclude:
+          - { opts: { should-build: false } }
+
+    env:
+      BIN: godot.windows.${{matrix.opts.target}}.${{matrix.opts.arch}}${{matrix.opts.llvm && '.llvm' || ''}}${{matrix.opts.dotnet == true && '.mono' || ''}}
+
+    steps:
+      - name: Clone Godot
+        uses: actions/checkout@v4
+        with:
+          repository: godotengine/godot
+          ref: ${{ inputs.godot-ref }}
+
+      - name: Clone LimboAI module
+        uses: actions/checkout@v4
+        with:
+          path: modules/limboai
+          ref: ${{ inputs.limboai-ref }}
+
+      # Inits GODOT_VERSION, LIMBOAI_VERSION and NAME_PREFIX environment variables.
+      - uses: ./modules/limboai/.github/actions/init-version
+
+      - name: Reconstruct artifact name
+        shell: bash
+        run: |
+          echo "ARTIFACT=${{env.NAME_PREFIX}}.dotnet.editor.windows.${{matrix.opts.arch}}" >> $GITHUB_ENV
+
+      - name: Download editor artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{env.ARTIFACT}}
+          path: bin/
+
+      - name: Build .NET assemblies
+        uses: ./modules/limboai/.github/actions/build-dotnet-assemblies
+        with:
+          platform: windows
+          bin: ${{env.BIN}}
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{env.ARTIFACT}}
+          overwrite: true
+          path: bin/*