[Explicit Module Builds] Add API to specify richer external target module details

Specifically, whether an external target moduel is a framework. This is required to pass this information down to the compiler in order to generate correct auto-linking directives.

Part of rdar://81177797

Author: artemcm

Sources/SwiftDriver/Driver/Driver.swift

@@ -23,6 +23,7 @@ public struct Driver {
     case invalidArgumentValue(String, String)
     case relativeFrontendPath(String)
     case subcommandPassedToDriver
+    case externalTargetDetailsAPIError
     case integratedReplRemoved
     case cannotSpecify_OForMultipleOutputs
     case conflictingOptions(Option, Option)
@@ -57,6 +58,8 @@ public struct Driver {
         return "relative frontend path: \(path)"
       case .subcommandPassedToDriver:
         return "subcommand passed to driver"
+      case .externalTargetDetailsAPIError:
+        return "Cannot specify both: externalTargetModulePathMap and externalTargetModuleDetailsMap"
       case .integratedReplRemoved:
         return "Compiler-internal integrated REPL has been removed; use the LLDB-enhanced REPL instead."
       case .cannotSpecify_OForMultipleOutputs:
@@ -307,7 +310,7 @@ public struct Driver {
 
   /// A dictionary of external targets that are a part of the same build, mapping to filesystem paths
   /// of their module files
-  @_spi(Testing) public var externalTargetModulePathMap: ExternalTargetModulePathMap? = nil
+  @_spi(Testing) public var externalTargetModuleDetailsMap: ExternalTargetModuleDetailsMap? = nil
 
   /// A collection of all the flags the selected toolchain's `swift-frontend` supports
   public let supportedFrontendFlags: Set<String>
@@ -388,8 +391,11 @@ public struct Driver {
   ///   an executable or as a library.
   /// - Parameter compilerExecutableDir: Directory that contains the compiler executable to be used.
   ///   Used when in `integratedDriver` mode as a substitute for the driver knowing its executable path.
-  /// - Parameter externalTargetModulePathMap: A dictionary of external targets that are a part of
-  ///   the same build, mapping to filesystem paths of their module files.
+  /// - Parameter externalTargetModulePathMap: DEPRECATED: A dictionary of external targets
+  ///   that are a part of the same build, mapping to filesystem paths of their module files.
+  /// - Parameter externalTargetModuleDetailsMap: A dictionary of external targets that are a part of
+  ///   the same build, mapping to a details value which includes a filesystem path of their
+  ///   `.swiftmodule` and a flag indicating whether the external target is a framework.
   /// - Parameter interModuleDependencyOracle: An oracle for querying inter-module dependencies,
   ///   shared across different module builds by a build system.
   public init(
@@ -400,7 +406,9 @@ public struct Driver {
     executor: DriverExecutor,
     integratedDriver: Bool = true,
     compilerExecutableDir: AbsolutePath? = nil,
+    // Deprecated in favour of the below `externalTargetModuleDetailsMap`
     externalTargetModulePathMap: ExternalTargetModulePathMap? = nil,
+    externalTargetModuleDetailsMap: ExternalTargetModuleDetailsMap? = nil,
     interModuleDependencyOracle: InterModuleDependencyOracle? = nil
   ) throws {
     self.env = env
@@ -410,8 +418,15 @@ public struct Driver {
     self.diagnosticEngine = diagnosticsEngine
     self.executor = executor
 
+    if externalTargetModulePathMap != nil && externalTargetModuleDetailsMap != nil {
+      throw Error.externalTargetDetailsAPIError
+    }
     if let externalTargetPaths = externalTargetModulePathMap {
-      self.externalTargetModulePathMap = externalTargetPaths
+      self.externalTargetModuleDetailsMap = externalTargetPaths.mapValues {
+        ExternalTargetModuleDetails(path: $0, isFramework: false)
+      }
+    } else if let externalTargetDetails = externalTargetModuleDetailsMap {
+      self.externalTargetModuleDetailsMap = externalTargetDetails
     }
 
     if case .subcommand = try Self.invocationRunMode(forArgs: args).mode {

Sources/SwiftDriver/ExplicitModuleBuilds/ExplicitDependencyBuildPlanner.swift

@@ -14,8 +14,22 @@ import TSCUtility
 import Foundation
 
 /// A map from a module identifier to a path to its .swiftmodule file.
+/// Deprecated in favour of the below `ExternalTargetModuleDetails`
 public typealias ExternalTargetModulePathMap = [ModuleDependencyId: AbsolutePath]
 
+/// Details about an external target, including the path to its .swiftmodule file
+/// and whether it is a framework.
+public struct ExternalTargetModuleDetails {
+  @_spi(Testing) public init(path: AbsolutePath, isFramework: Bool) {
+    self.path = path
+    self.isFramework = isFramework
+  }
+  let path: AbsolutePath
+  let isFramework: Bool
+}
+
+public typealias ExternalTargetModuleDetailsMap = [ModuleDependencyId: ExternalTargetModuleDetails]
+
 /// In Explicit Module Build mode, this planner is responsible for generating and providing
 /// build jobs for all module dependencies and providing compile command options
 /// that specify said explicit module dependencies.
@@ -317,16 +331,17 @@ public typealias ExternalTargetModulePathMap = [ModuleDependencyId: AbsolutePath
                                     modulePath: TextualVirtualPath(path: clangModulePath),
                                     moduleMapPath: dependencyClangModuleDetails.moduleMapPath))
         case .swiftPrebuiltExternal:
-          let compiledModulePath = try dependencyGraph
-                                         .swiftPrebuiltDetails(of: dependencyId)
-                                         .compiledModulePath
+          let prebuiltModuleDetails = try dependencyGraph.swiftPrebuiltDetails(of: dependencyId)
+          let compiledModulePath = prebuiltModuleDetails.compiledModulePath
+          let isFramework = prebuiltModuleDetails.isFramework
           let swiftModulePath: TypedVirtualPath =
             .init(file: compiledModulePath.path, type: .swiftModule)
           // Accumulate the requried information about this dependency
           // TODO: add .swiftdoc and .swiftsourceinfo for this module.
           swiftDependencyArtifacts.append(
             SwiftModuleArtifactInfo(name: dependencyId.moduleName,
-                                    modulePath: TextualVirtualPath(path: swiftModulePath.fileHandle)))
+                                    modulePath: TextualVirtualPath(path: swiftModulePath.fileHandle),
+                                    isFramework: isFramework))
         case .swiftPlaceholder:
           fatalError("Unresolved placeholder dependencies at planning stage: \(dependencyId) of \(moduleId)")
       }

Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/CommonDependencyOperations.swift

@@ -15,9 +15,10 @@ import TSCBasic
   /// For targets that are built alongside the driver's current module, the scanning action will report them as
   /// textual targets to be built from source. Because we can rely on these targets to have been built prior
   /// to the driver's current target, we resolve such external targets as prebuilt binary modules, in the graph.
-  mutating func resolveExternalDependencies(for externalTargetModulePathMap: ExternalTargetModulePathMap)
+  mutating func resolveExternalDependencies(for externalTargetModuleDetailsMap: ExternalTargetModuleDetailsMap)
   throws {
-    for (externalModuleId, externalModulePath) in externalTargetModulePathMap {
+    for (externalModuleId, externalModuleDetails) in externalTargetModuleDetailsMap {
+      let externalModulePath = externalModuleDetails.path
       // Replace the occurence of a Swift module to-be-built from source-file
       // to an info that describes a pre-built binary module.
       let swiftModuleId: ModuleDependencyId = .swift(externalModuleId.moduleName)
@@ -32,12 +33,12 @@ import TSCBasic
       let newModuleId: ModuleDependencyId = .swiftPrebuiltExternal(externalModuleId.moduleName)
       let newExternalModuleDetails =
       try SwiftPrebuiltExternalModuleDetails(compiledModulePath:
-                                              TextualVirtualPath(path: VirtualPath.absolute(externalModulePath).intern()))
+                                              TextualVirtualPath(path: VirtualPath.absolute(externalModulePath).intern()),
+                                             isFramework: externalModuleDetails.isFramework)
       let newInfo = ModuleInfo(modulePath: TextualVirtualPath(path: VirtualPath.absolute(externalModulePath).intern()),
                                sourceFiles: [],
                                directDependencies: currentInfo.directDependencies,
                                details: .swiftPrebuiltExternal(newExternalModuleDetails))
-
       Self.replaceModule(originalId: swiftModuleId, replacementId: newModuleId,
                          replacementInfo: newInfo, in: &modules)
     }

Sources/SwiftDriver/ExplicitModuleBuilds/InterModuleDependencies/InterModuleDependencyGraph.swift

@@ -132,12 +132,17 @@ public struct SwiftPrebuiltExternalModuleDetails: Codable {
   /// The path to the .swiftSourceInfo file.
   public var moduleSourceInfoPath: TextualVirtualPath?
 
+  /// A flag to indicate whether or not this module is a framework.
+  public var isFramework: Bool
+
   public init(compiledModulePath: TextualVirtualPath,
               moduleDocPath: TextualVirtualPath? = nil,
-              moduleSourceInfoPath: TextualVirtualPath? = nil) throws {
+              moduleSourceInfoPath: TextualVirtualPath? = nil,
+              isFramework: Bool = false) throws {
     self.compiledModulePath = compiledModulePath
     self.moduleDocPath = moduleDocPath
     self.moduleSourceInfoPath = moduleSourceInfoPath
+    self.isFramework = isFramework
   }
 }
 

Sources/SwiftDriver/ExplicitModuleBuilds/ModuleDependencyScanning.swift

@@ -53,7 +53,8 @@ public extension Driver {
     // FIXME: MSVC runtime flags
 
     // Pass in external target dependencies to be treated as placeholder dependencies by the scanner
-    if let externalTargetPaths = externalTargetModulePathMap {
+    if let externalTargetDetails = externalTargetModuleDetailsMap {
+      let externalTargetPaths = externalTargetDetails.mapValues { $0.path }
       let dependencyPlaceholderMapFile =
       try serializeExternalDependencyArtifacts(externalTargetPaths: externalTargetPaths)
       commandLine.appendFlag("-placeholder-dependency-module-map-file")

Sources/SwiftDriver/Jobs/Planning.swift

@@ -513,9 +513,9 @@ extension Driver {
   throws -> InterModuleDependencyGraph {
     var dependencyGraph = try performDependencyScan()
 
-    if let externalTargetPaths = externalTargetModulePathMap {
+    if let externalTargetDetails = externalTargetModuleDetailsMap {
       // Resolve external dependencies in the dependency graph, if any.
-      try dependencyGraph.resolveExternalDependencies(for: externalTargetPaths)
+      try dependencyGraph.resolveExternalDependencies(for: externalTargetDetails)
     }
 
     // Re-scan Clang modules at all the targets they will be built against.

Tests/SwiftDriverTests/ExplicitModuleBuildTests.swift

@@ -215,6 +215,52 @@ final class ExplicitModuleBuildTests: XCTestCase {
     }
   }
 
+  func testModuleDependencyBuildCommandGenerationWithExternalFramework() throws {
+    do {
+      let externalDetails: ExternalTargetModuleDetailsMap =
+            [.swiftPrebuiltExternal("A"): ExternalTargetModuleDetails(path: AbsolutePath("/tmp/A.swiftmodule"),
+                                                      isFramework: true)]
+      var driver = try Driver(args: ["swiftc", "-experimental-explicit-module-build",
+                                     "-module-name", "testModuleDependencyBuildCommandGenerationWithExternalFramework",
+                                     "test.swift"])
+      var moduleDependencyGraph =
+            try JSONDecoder().decode(
+              InterModuleDependencyGraph.self,
+              from: ModuleDependenciesInputs.simpleDependencyGraphInput.data(using: .utf8)!)
+      // Key part of this test, using the external info to generate dependency pre-build jobs
+      try moduleDependencyGraph.resolveExternalDependencies(for: externalDetails)
+      driver.explicitDependencyBuildPlanner =
+        try ExplicitDependencyBuildPlanner(dependencyGraph: moduleDependencyGraph,
+                                           toolchain: driver.toolchain)
+      let modulePrebuildJobs =
+        try driver.explicitDependencyBuildPlanner!.generateExplicitModuleDependenciesBuildJobs()
+
+      XCTAssertEqual(modulePrebuildJobs.count, 1)
+      let job = modulePrebuildJobs.first!
+      // Load the dependency JSON and verify this dependency was encoded correctly
+      let explicitDepsFlag =
+        SwiftDriver.Job.ArgTemplate.flag(String("-explicit-swift-module-map-file"))
+      XCTAssert(job.commandLine.contains(explicitDepsFlag))
+      let jsonDepsPathIndex = job.commandLine.firstIndex(of: explicitDepsFlag)
+      let jsonDepsPathArg = job.commandLine[jsonDepsPathIndex! + 1]
+      guard case .path(let jsonDepsPath) = jsonDepsPathArg else {
+        XCTFail("No JSON dependency file path found.")
+        return
+      }
+      guard case let .temporaryWithKnownContents(_, contents) = jsonDepsPath else {
+        XCTFail("Unexpected path type")
+        return
+      }
+      let dependencyInfoList = try JSONDecoder().decode(Array<SwiftModuleArtifactInfo>.self,
+                                                    from: contents)
+      XCTAssertEqual(dependencyInfoList.count, 1)
+      let dependencyArtifacts =
+        dependencyInfoList.first(where:{ $0.moduleName == "A" })!
+      // Ensure this is a framework, as specified by the externalDetails above.
+      XCTAssertEqual(dependencyArtifacts.isFramework, true)
+    }
+  }
+
   private func pathMatchesSwiftModule(path: VirtualPath, _ name: String) -> Bool {
     return path.basenameWithoutExt.starts(with: "\(name)-") &&
            path.extension! == FileType.swiftModule.rawValue

Tests/SwiftDriverTests/Inputs/ExplicitModuleDependencyBuildInputs.swift

@@ -396,6 +396,82 @@ enum ModuleDependenciesInputs {
     """
   }
 
+  static var simpleDependencyGraphInput: String {
+    """
+    {
+      "mainModuleName": "main",
+      "modules": [
+        {
+          "swift": "main"
+        },
+        {
+          "modulePath": "main.swiftmodule",
+          "sourceFiles": [
+            "/main/main.swift"
+          ],
+          "directDependencies": [
+            {
+              "swift": "B"
+            },
+          ],
+          "details": {
+            "swift": {
+              "isFramework": false,
+              "extraPcmArgs": [
+                "-Xcc",
+                "-fapinotes-swift-version=5"
+              ]
+            }
+          }
+        },
+        {
+          "swift" : "B"
+        },
+        {
+          "modulePath" : "B.swiftmodule",
+          "sourceFiles": [
+          ],
+          "directDependencies" : [
+            {
+              "swift": "A"
+            },
+          ],
+          "details" : {
+            "swift" : {
+              "moduleInterfacePath": "B.swiftmodule/B.swiftinterface",
+              "isFramework": false,
+              "extraPcmArgs": [
+                "-Xcc",
+                "-fapinotes-swift-version=5"
+              ],
+            }
+          }
+        },
+        {
+          "swift": "A"
+        },
+        {
+          "modulePath": "/tmp/A.swiftmodule",
+          "sourceFiles": [
+            "/A/A.swift"
+          ],
+          "directDependencies" : [
+          ],
+          "details": {
+            "swift": {
+              "isFramework": false,
+              "extraPcmArgs": [
+                "-Xcc",
+                "-fapinotes-swift-version=5"
+              ]
+            }
+          }
+        }
+      ]
+    }
+    """
+  }
+
   static var mergeGraphInput2: String {
     """
     {