Add DocC skip inherited docs parameter as a build setting

Sources/SWBCore/Settings/BuiltinMacros.swift

@@ -1100,6 +1100,7 @@ public final class BuiltinMacros {
     public static let DOCC_PRETTY_PRINT = BuiltinMacros.declareBooleanMacro("DOCC_PRETTY_PRINT")
     public static let DOCC_EXTRACT_SPI_DOCUMENTATION = BuiltinMacros.declareBooleanMacro("DOCC_EXTRACT_SPI_DOCUMENTATION")
     public static let DOCC_MINIMUM_ACCESS_LEVEL = BuiltinMacros.declareEnumMacro("DOCC_MINIMUM_ACCESS_LEVEL") as EnumMacroDeclaration<DoccMinimumAccessLevel>
+    public static let DOCC_SKIP_INHERITED_DOCS = BuiltinMacros.declareBooleanMacro("DOCC_SKIP_INHERITED_DOCS")
     public static let DOCC_SKIP_SYNTHESIZED_MEMBERS = BuiltinMacros.declareBooleanMacro("DOCC_SKIP_SYNTHESIZED_MEMBERS")
     public static let DOCC_EXTRACT_EXTENSION_SYMBOLS = BuiltinMacros.declareBooleanMacro("DOCC_EXTRACT_EXTENSION_SYMBOLS")
     public static let DOCC_EXTRACT_SWIFT_INFO_FOR_OBJC_SYMBOLS = BuiltinMacros.declareBooleanMacro("DOCC_EXTRACT_SWIFT_INFO_FOR_OBJC_SYMBOLS")
@@ -1651,6 +1652,7 @@ public final class BuiltinMacros {
         DISABLE_XCFRAMEWORK_SIGNATURE_VALIDATION,
         DOCC_ARCHIVE_PATH,
         DOCC_PRETTY_PRINT,
+        DOCC_SKIP_INHERITED_DOCS,
         DOCC_SKIP_SYNTHESIZED_MEMBERS,
         DOCC_MINIMUM_ACCESS_LEVEL,
         DOCC_EXTRACT_SPI_DOCUMENTATION,

Sources/SWBCore/SpecImplementations/Tools/DocumentationCompiler.swift

@@ -92,6 +92,11 @@ final public class DocumentationCompilerSpec: GenericCompilerSpec, SpecIdentifie
             additionalFlags.append("-symbol-graph-skip-synthesized-members")
         }
 
+        // Check if inherited docs should be skipped
+        if cbc.scope.evaluate(BuiltinMacros.DOCC_SKIP_INHERITED_DOCS) {
+            additionalFlags.append("-symbol-graph-skip-inherited-docs")
+        }
+
         switch cbc.scope.evaluate(BuiltinMacros.DOCC_MINIMUM_ACCESS_LEVEL) {
         case .none:
             switch DocumentationType(from: cbc) {

Sources/SWBUniversalPlatform/Specs/Documentation.xcspec

@@ -168,6 +168,13 @@
                 DefaultValue = NO;
             },
 
+            // If the swift compiler / Swift symbol graph extractor should skip inherited docs
+            {
+                Name = DOCC_SKIP_INHERITED_DOCS;
+                Type = bool;
+                DefaultValue = NO;
+            },
+
             // If the Swift compiler / Swift symbol graph extractor should skip synthesized members.
             {
                 Name = DOCC_SKIP_SYNTHESIZED_MEMBERS;

Tests/SWBCoreTests/DocumentationCompilerSpecTests.swift

@@ -81,9 +81,15 @@ import SWBMacro
             swiftCompilerInfo: try mockSwiftCompilerSpec(swiftVersion: "5.6", swiftTag: "swiftlang-5.6.0.0")
         )
         #expect(skipSynthesizedMembers == ["-symbol-graph-skip-synthesized-members"])
+
+        let skipInheritedDocs = await DocumentationCompilerSpec.additionalSymbolGraphGenerationArgs(
+            try mockApplicationBuildContext(application: false, skipInheritedDocs: true),
+            swiftCompilerInfo: try mockSwiftCompilerSpec(swiftVersion: "5.6", swiftTag: "swiftlang-5.6.0.0")
+        )
+        #expect(skipInheritedDocs == ["-symbol-graph-skip-inherited-docs"])
     }
 
-    private func mockApplicationBuildContext(application: Bool, minimumAccessLevel: DoccMinimumAccessLevel = .none, prettyPrint: Bool = false, skipSynthesizedMembers: Bool = false) async throws -> CommandBuildContext {
+    private func mockApplicationBuildContext(application: Bool, minimumAccessLevel: DoccMinimumAccessLevel = .none, prettyPrint: Bool = false, skipSynthesizedMembers: Bool = false, skipInheritedDocs: Bool = false) async throws -> CommandBuildContext {
         let core = try await getCore()
 
         let producer = try MockCommandProducer(
@@ -107,6 +113,10 @@ import SWBMacro
             mockTable.push(BuiltinMacros.DOCC_SKIP_SYNTHESIZED_MEMBERS, literal: skipSynthesizedMembers)
         }
 
+        if skipInheritedDocs {
+            mockTable.push(BuiltinMacros.DOCC_SKIP_INHERITED_DOCS, literal: true)
+        }
+
         let mockScope = MacroEvaluationScope(table: mockTable)
 
         return CommandBuildContext(producer: producer, scope: mockScope, inputs: [])