Merge pull request #1371 from hyp/eng/clang-header-path-driver

[cxx-interop] make -emit-clang-header-path a driver flag

Author: hyp

Sources/SwiftOptions/Options.swift

@@ -267,7 +267,7 @@ extension Option {
   public static let emitAst: Option = Option("-emit-ast", .flag, alias: Option.dumpAst, attributes: [.frontend, .noInteractive, .doesNotAffectIncrementalBuild])
   public static let emitBc: Option = Option("-emit-bc", .flag, attributes: [.frontend, .noInteractive, .doesNotAffectIncrementalBuild], helpText: "Emit LLVM BC file(s)", group: .modes)
   public static let emitClangHeaderNonmodularIncludes: Option = Option("-emit-clang-header-nonmodular-includes", .flag, attributes: [.frontend, .noInteractive, .supplementaryOutput], helpText: "Augment emitted Objective-C header with textual imports for every included modular import")
-  public static let emitClangHeaderPath: Option = Option("-emit-clang-header-path", .separate, alias: Option.emitObjcHeaderPath, attributes: [.frontend, .noDriver, .noInteractive, .argumentIsPath, .supplementaryOutput], helpText: "Emit an Objective-C and C++ header file to <path>")
+  public static let emitClangHeaderPath: Option = Option("-emit-clang-header-path", .separate, alias: Option.emitObjcHeaderPath, attributes: [.frontend, .noInteractive, .argumentIsPath, .supplementaryOutput], helpText: "Emit an Objective-C and C++ header file to <path>")
   public static let emitConstValuesPath: Option = Option("-emit-const-values-path", .separate, attributes: [.frontend, .noInteractive, .argumentIsPath, .supplementaryOutput], metaVar: "<path>", helpText: "Emit the extracted compile-time known values to <path>")
   public static let emitConstValues: Option = Option("-emit-const-values", .flag, attributes: [.noInteractive, .supplementaryOutput])
   public static let emitDependenciesPath: Option = Option("-emit-dependencies-path", .separate, attributes: [.frontend, .noDriver], metaVar: "<path>", helpText: "Output basic Make-compatible dependencies file to <path>")

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -6773,6 +6773,18 @@ final class SwiftDriverTests: XCTestCase {
 #endif
   }
 
+  func testEmitClangHeaderPath() throws {
+      VirtualPath.resetTemporaryFileStore()
+      var driver = try Driver(args: [
+        "swiftc", "-emit-clang-header-path", "path/to/header", "-typecheck", "test.swift"
+      ])
+      let jobs = try driver.planBuild().removingAutolinkExtractJobs()
+      XCTAssertEqual(jobs.count, 2)
+      let job = jobs.first!
+      XCTAssertTrue(job.commandLine.contains(.flag("-emit-objc-header-path")))
+      XCTAssertTrue(job.commandLine.contains(.path(.relative(RelativePath("path/to/header")))))
+  }
+
   func testGccToolchainFlags() throws {
       VirtualPath.resetTemporaryFileStore()
       var driver = try Driver(args: [