Add a basic build workflow

.github/workflows/build.yml

@@ -0,0 +1,63 @@
+# Copyright (c) FAForever
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+name: Build
+
+on:
+  push:
+  workflow_dispatch:
+  workflow_call:
+
+jobs:
+  build:
+    environment: deploy
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+      - uses: msys2/setup-msys2@v2
+        with:
+          msystem: MINGW32
+
+      - name: Install MinGW
+        run: |
+          pacman --noconfirm -S mingw-w64-i686-gcc
+
+      - uses: actions/checkout@v4
+
+      - name: Download Patcher
+        run: curl -L "https://github.com/FAForever/FA_Patcher/releases/latest/download/FaP.exe" -o BinaryPatcher.exe
+
+      - name: Download Baseline
+        run: curl -L "https://content.faforever.com/build/ForgedAlliance_base.exe" -o ForgedAlliance_base.exe
+
+      - name: Patch Binary
+        run: |
+          # 
+          echo '#define gitsha "'${GITHUB_SHA::7}'"' > workflow.cpp
+          ./BinaryPatcher.exe
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: "ForgedAlliance_exxt.exe"
+          name: "ForgedAlliance_${{ github.sha }}.exe"
+          retention-days: 7