Merge pull request #3020 from abertelrud/eng/wip-generate-source-from-package-manifest-for-package-init

Ability to write out package manifests as source code (for mechanical package generation)

Author: abertelrud

Sources/PackageModel/CMakeLists.txt

@@ -19,6 +19,7 @@ add_library(PackageModel
   Manifest/SystemPackageProviderDescription.swift
   Manifest/TargetBuildSettingDescription.swift
   Manifest/TargetDescription.swift
+  ManifestSourceGeneration.swift
   ModuleMapType.swift
   Package.swift
   PackageReference.swift