Add CMakeLists.txt to Manifest subdirectory

Use target_sources to add Manifest subdirectory

Author: mattt

Sources/PackageModel/CMakeLists.txt

@@ -12,14 +12,6 @@ add_library(PackageModel
   BuildSettings.swift
   Diagnostics.swift
   Manifest.swift
-  Manifest/FilteredDependencyDescription.swift
-  Manifest/PackageConditionDescription.swift
-  Manifest/PackageDependencyDescription.swift
-  Manifest/PlatformDescription.swift
-  Manifest/ProductDescription.swift
-  Manifest/SystemPackageProviderDescription.swift
-  Manifest/TargetBuildSettingDescription.swift
-  Manifest/TargetDescription.swift
   ModuleMapType.swift
   Package.swift
   PackageReference.swift
@@ -31,6 +23,7 @@ add_library(PackageModel
   SupportedLanguageExtension.swift
   SwiftLanguageVersion.swift
   ToolsVersion.swift)
+add_subdirectory(Manifest)
 target_link_libraries(PackageModel PUBLIC
   TSCBasic
   TSCUtility)

Sources/PackageModel/Manifest/CMakeLists.txt

@@ -0,0 +1,17 @@
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
+
+target_sources(PackageModel PUBLIC
+  FilteredDependencyDescription.swift
+  PackageConditionDescription.swift
+  PackageDependencyDescription.swift
+  PlatformDescription.swift
+  ProductDescription.swift
+  SystemPackageProviderDescription.swift
+  TargetBuildSettingDescription.swift
+  TargetDescription.swift)