Dependencies: include moduleDependenciesContext in the Swift compilation requirements signature

Author: mirza-garibovic

Sources/SWBCore/SpecImplementations/Tools/SwiftCompiler.swift

@@ -2381,8 +2381,25 @@ public final class SwiftCompilerSpec : CompilerSpec, SpecIdentifierType, SwiftDi
                     dependencyData = nil
                 }
 
+                let compilationRequirementAdditionalSignatureData: String
+                if let moduleDependenciesContext = cbc.producer.moduleDependenciesContext {
+                    do {
+                        let jsonData = try JSONEncoder(outputFormatting: [.prettyPrinted, .sortedKeys, .withoutEscapingSlashes]).encode(moduleDependenciesContext)
+                        guard let signature = String(data: jsonData, encoding: .utf8) else {
+                            throw StubError.error("non-UTF-8 data")
+                        }
+                        compilationRequirementAdditionalSignatureData = additionalSignatureData + "|\(signature)"
+                    } catch {
+                        delegate.error("failed to serialize 'MODULE_DEPENDENCIES' context information: \(error)")
+                        return
+                    }
+                }
+                else {
+                    compilationRequirementAdditionalSignatureData = additionalSignatureData
+                }
+
                 // Compilation Requirements
-                delegate.createTask(type: self, dependencyData: dependencyData, payload: payload, ruleInfo: ruleInfo("SwiftDriver Compilation Requirements", targetName), additionalSignatureData: additionalSignatureData, commandLine: ["builtin-Swift-Compilation-Requirements", "--"] + args, environment: environmentBindings, workingDirectory: compilerWorkingDirectory(cbc), inputs: allInputsNodes, outputs: compilationRequirementOutputs, action: delegate.taskActionCreationDelegate.createSwiftCompilationRequirementTaskAction(), execDescription: archSpecificExecutionDescription(cbc.scope.namespace.parseString("Unblock downstream dependents of $PRODUCT_NAME"), cbc, delegate), preparesForIndexing: true, enableSandboxing: enableSandboxing, additionalTaskOrderingOptions: [.compilation, .compilationRequirement, .linkingRequirement, .blockedByTargetHeaders, .compilationForIndexableSourceFile], usesExecutionInputs: true, showInLog: true)
+                delegate.createTask(type: self, dependencyData: dependencyData, payload: payload, ruleInfo: ruleInfo("SwiftDriver Compilation Requirements", targetName), additionalSignatureData: compilationRequirementAdditionalSignatureData, commandLine: ["builtin-Swift-Compilation-Requirements", "--"] + args, environment: environmentBindings, workingDirectory: compilerWorkingDirectory(cbc), inputs: allInputsNodes, outputs: compilationRequirementOutputs, action: delegate.taskActionCreationDelegate.createSwiftCompilationRequirementTaskAction(), execDescription: archSpecificExecutionDescription(cbc.scope.namespace.parseString("Unblock downstream dependents of $PRODUCT_NAME"), cbc, delegate), preparesForIndexing: true, enableSandboxing: enableSandboxing, additionalTaskOrderingOptions: [.compilation, .compilationRequirement, .linkingRequirement, .blockedByTargetHeaders, .compilationForIndexableSourceFile], usesExecutionInputs: true, showInLog: true)
 
                 if case .compile = compilationMode {
                     // Unblocking compilation