C#: Add option to treat warnings as errors

.github/workflows/linux_builds.yml

@@ -176,7 +176,7 @@ jobs:
         if: matrix.build-mono
         run: |
           dotnet --info
-          ./modules/mono/build_scripts/build_assemblies.py --godot-output-dir=./bin --godot-platform=linuxbsd
+          ./modules/mono/build_scripts/build_assemblies.py --godot-output-dir=./bin --godot-platform=linuxbsd --werror
 
       - name: Prepare artifact
         if: matrix.artifact

modules/mono/build_scripts/build_assemblies.py

@@ -194,7 +194,7 @@ def run_msbuild(tools: ToolsLocation, sln: str, chdir_to: str, msbuild_args: Opt
     return subprocess.call(args, env=msbuild_env, cwd=chdir_to)
 
 
-def build_godot_api(msbuild_tool, module_dir, output_dir, push_nupkgs_local, precision, no_deprecated):
+def build_godot_api(msbuild_tool, module_dir, output_dir, push_nupkgs_local, precision, no_deprecated, werror):
     target_filenames = [
         "GodotSharp.dll",
         "GodotSharp.pdb",
@@ -219,6 +219,8 @@ def build_godot_api(msbuild_tool, module_dir, output_dir, push_nupkgs_local, pre
             args += ["/p:GodotFloat64=true"]
         if no_deprecated:
             args += ["/p:GodotNoDeprecated=true"]
+        if werror:
+            args += ["/p:TreatWarningsAsErrors=true"]
 
         sln = os.path.join(module_dir, "glue/GodotSharp/GodotSharp.sln")
         exit_code = run_msbuild(msbuild_tool, sln=sln, chdir_to=module_dir, msbuild_args=args)
@@ -339,13 +341,15 @@ def generate_sdk_package_versions():
 
 
 def build_all(
-    msbuild_tool, module_dir, output_dir, godot_platform, dev_debug, push_nupkgs_local, precision, no_deprecated
+    msbuild_tool, module_dir, output_dir, godot_platform, dev_debug, push_nupkgs_local, precision, no_deprecated, werror
 ):
     # Generate SdkPackageVersions.props and VersionDocsUrl constant
     generate_sdk_package_versions()
 
     # Godot API
-    exit_code = build_godot_api(msbuild_tool, module_dir, output_dir, push_nupkgs_local, precision, no_deprecated)
+    exit_code = build_godot_api(
+        msbuild_tool, module_dir, output_dir, push_nupkgs_local, precision, no_deprecated, werror
+    )
     if exit_code != 0:
         return exit_code
 
@@ -402,6 +406,7 @@ def main():
         default=False,
         help="Build GodotSharp without using deprecated features. This is required, if the engine was built with 'deprecated=no'.",
     )
+    parser.add_argument("--werror", action="store_true", default=False, help="Treat compiler warnings as errors.")
 
     args = parser.parse_args()
 
@@ -427,6 +432,7 @@ def main():
         push_nupkgs_local,
         args.precision,
         args.no_deprecated,
+        args.werror,
     )
     sys.exit(exit_code)
 

modules/mono/glue/GodotSharp/GodotSharp/Core/Bridge/ScriptManagerBridge.types.cs

@@ -12,6 +12,8 @@ namespace Godot.Bridge;
 
 public static partial class ScriptManagerBridge
 {
+    [SuppressMessage("Design", "CA1001", MessageId = "Types that own disposable fields should be disposable",
+            Justification = "Not applicable. The class functions as a persistent singleton.")]
     private class ScriptTypeBiMap
     {
         public readonly ReaderWriterLockSlim ReadWriteLock = new(LockRecursionPolicy.SupportsRecursion);
@@ -66,7 +68,7 @@ public static partial class ScriptManagerBridge
         private System.Collections.Generic.Dictionary<string, Type> _pathTypeMap = new();
         private System.Collections.Generic.Dictionary<Type, string> _typePathMap = new();
 
-        public IReadOnlyCollection<string> Paths => _pathTypeMap.Keys;
+        public System.Collections.Generic.Dictionary<string, Type>.KeyCollection Paths => _pathTypeMap.Keys;
 
         public void Add(string scriptPath, Type scriptType)
         {