Added possiblity of not adding /noconfig and similar arguments in C#

Author: Overhatted

prelude/csharp/csharp.bzl

@@ -32,17 +32,18 @@ def csharp_library_impl(ctx: AnalysisContext) -> list[Provider]:
         format = "/out:{}",
     ))
 
-    # Don't include any default .NET framework assemblies like "mscorlib" or "System" unless
-    # explicitly requested with `/reference:{}`. This flag also stops injection of other
-    # default compiler flags.
-    cmd.append("/noconfig")
-
-    # Don't reference mscorlib.dll unless asked for. This is required for targets that target
-    # embedded platforms such as Silverlight or WASM. (Originally for Buck1 compatibility.)
-    cmd.append("/nostdlib")
-
-    # Don't search any paths for .NET libraries unless explicitly referenced with `/lib:{}`.
-    cmd.append("/nosdkpath")
+    if ctx.attrs.add_hermetic_arguments:
+        # Don't include any default .NET framework assemblies like "mscorlib" or "System" unless
+        # explicitly requested with `/reference:{}`. This flag also stops injection of other
+        # default compiler flags.
+        cmd.append("/noconfig")
+
+        # Don't reference mscorlib.dll unless asked for. This is required for targets that target
+        # embedded platforms such as Silverlight or WASM. (Originally for Buck1 compatibility.)
+        cmd.append("/nostdlib")
+
+        # Don't search any paths for .NET libraries unless explicitly referenced with `/lib:{}`.
+        cmd.append("/nosdkpath")
 
     # Let csc know the directory path where it can find system assemblies. This is the path
     # that is searched by `/reference:{libname}` if `libname` is just a DLL name.

prelude/decls/dotnet_rules.bzl

@@ -78,6 +78,7 @@ csharp_library = prelude_rule(
             "compiler_flags": attrs.list(attrs.string(), default = [], doc = """
                 The set of additional compiler flags to pass to the compiler.
             """),
+            "add_hermetic_arguments": attrs.bool(default = True),
         } |
         buck.licenses_arg() |
         buck.labels_arg() |