Update build.yml (#387)

* Update build.yml

This PR adds a validation check to make sure code generator is executed before pushing to nuget.

* Update build.yml

Author: zaafar

.github/workflows/build.yml

@@ -10,24 +10,35 @@ jobs:
     runs-on: windows-latest
     steps:
     - name: Checkout Repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         fetch-depth: 0
 
     - name: Install .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v3
       with:
         dotnet-version: 6.0.x
+
     - name: Restore dependencies
       run: dotnet restore src
+
     - name: Build Project
       run: dotnet build -c Release --no-restore src
 
     - name: Build Packages
       run: dotnet pack src/ImGui.NET -c Release --no-restore --no-build
+
     - name: List Packages
       run: ls -l bin\Release\ImGui.NET\
 
+    - name: Validate Generated Code
+      if: startsWith(github.ref, 'refs/tags/')
+      shell: bash
+      run: |
+        echo "Running CodeGenerator"
+        bin/Release/CodeGenerator/net6.0/CodeGenerator.exe "src/ImGui.NET/Generated"
+        git status -s | findstr . && echo "ERROR: CodeGenerator is not executed, please execute it." && exit 1 || exit 0
+
     - name: Publish to nuget.org
       if: startsWith(github.ref, 'refs/tags/')
       run: dotnet nuget push bin\Release\ImGui.NET\*.nupkg -s https://api.nuget.org/v3/index.json --api-key ${{secrets.NUGET_KEY}}