Add msys2 CI

.github/workflows/linux-build.yml

@@ -1,9 +1,10 @@
-name: Linux-Build
+name: Linux build
 
 on:
   pull_request:
   push:
     paths-ignore:
+      - '.github/workflows/msys2-build.yml'
       - '.github/workflows/windows-build.yml'
       - '.gitignore'
       - 'LICENSE'
@@ -56,7 +57,7 @@ jobs:
     - name: Retrieve dependencies hash
       id: dep_hash
       run: echo "::set-output name=hash::$(xmake l utils.ci.packageskey)"
-  
+
     # Cache xmake dependencies
     - name: Retrieve cached xmake dependencies
       uses: actions/cache@v2

.github/workflows/msys2-build.yml

@@ -0,0 +1,90 @@
+name: MSYS2 build (MinGW-w64)
+
+on:
+  pull_request:
+  push:
+    paths-ignore:
+      - '.github/workflows/linux-build.yml'
+      - '.github/workflows/windows-build.yml'
+      - '.gitignore'
+      - 'LICENSE'
+      - 'CHANGELOG.md'
+      - 'README.md'
+      - 'README_en.md'
+      - 'README_fr.md'
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        msystem: [mingw64]
+        os: [windows-latest]
+        arch: [x86_64]
+        mode: [debug, releasedbg]
+
+    runs-on: ${{ matrix.os }}
+    if: "!contains(github.event.head_commit.message, 'ci skip')"
+
+    defaults:
+      run:
+        shell: msys2 {0}
+
+    steps:
+    - uses: actions/checkout@v2
+
+    # Setup MSYS2
+    - uses: msys2/setup-msys2@v2
+      with:
+        msystem: ${{ matrix.msystem }}
+        install: git base-devel unzip p7zip mingw-w64-${{ matrix.arch }}-toolchain
+        update: true
+
+    # Install Qt (required for shader nodes editor)
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v2
+      with:
+        arch: win64_mingw81
+
+    # Force xmake to a specific folder (for cache)
+    - name: Set xmake env
+      run: echo "XMAKE_GLOBALDIR=${{ runner.workspace }}/xmake-global" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
+    # Install xmake
+    - name: Setup xmake
+      uses: xmake-io/github-action-setup-xmake@v1
+      with:
+        xmake-version: branch@dev
+
+    # Update xmake repository (in order to have the file that will be cached)
+    - name: Update xmake repository
+      run: xmake.exe repo --update
+
+    # Fetch xmake dephash
+    - name: Retrieve dependencies hash
+      id: dep_hash
+      run: echo "::set-output name=hash::$(xmake.exe l utils.ci.packageskey)"
+  
+    # Cache xmake dependencies
+    - name: Retrieve cached xmake dependencies
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.XMAKE_GLOBALDIR }}\.xmake\packages
+        key: ${{ runner.os }}-${{ matrix.arch }}-${{ matrix.mode }}-${{ steps.dep_hash.outputs.hash }}
+
+    # Setup compilation mode and install project dependencies
+    - name: Configure xmake and install dependencies
+      run: xmake.exe config --arch=${{ matrix.arch }} --mode=${{ matrix.mode }} --yes --verbose
+
+    # Build the engine
+    - name: Build Nazara
+      run: xmake.exe
+
+    # Install the result files
+    - name: Install Nazara
+      run: xmake.exe install -vo package
+
+    # Upload artifacts
+    - uses: actions/upload-artifact@v2
+      with:
+        name: ${{ matrix.os }}-${{ matrix.arch }}-${{ matrix.mode }}
+        path: package

.github/workflows/windows-build.yml

@@ -1,10 +1,11 @@
-name: Windows-Build
+name: Windows build
 
 on:
   pull_request:
   push:
     paths-ignore:
       - '.github/workflows/linux-build.yml'
+      - '.github/workflows/msys2-build.yml'
       - '.gitignore'
       - 'LICENSE'
       - 'CHANGELOG.md'
@@ -48,7 +49,7 @@ jobs:
     - name: Retrieve dependencies hash
       id: dep_hash
       run: echo "::set-output name=hash::$(xmake.exe l utils.ci.packageskey)"
-  
+
     # Cache xmake dependencies
     - name: Retrieve cached xmake dependencies
       uses: actions/cache@v2