Workspace: make some of the private API more public

This extends the visibility of some of the private implementation to the
package level to allow use for testing without `@testable` imports.

Author: compnerd

Sources/Workspace/PackageContainer/RegistryPackageContainer.swift

@@ -122,7 +122,7 @@ public class RegistryPackageContainer: PackageContainer {
     }
 
     // marked internal for testing
-    internal func loadManifest(version: Version) async throws -> Manifest {
+    package func loadManifest(version: Version) async throws -> Manifest {
         let result = try await self.getAvailableManifestsFilesystem(version: version)
 
         let manifests = result.manifests

Sources/Workspace/PackageContainer/SourceControlPackageContainer.swift

@@ -26,7 +26,7 @@ import enum TSCUtility.Git
 import struct TSCUtility.Version
 
 /// Adaptor to expose an individual repository as a package container.
-internal final class SourceControlPackageContainer: PackageContainer, CustomStringConvertible {
+package final class SourceControlPackageContainer: PackageContainer, CustomStringConvertible {
     public typealias Constraint = PackageContainerConstraint
 
     // A wrapper for getDependencies() errors. This adds additional information
@@ -75,7 +75,7 @@ internal final class SourceControlPackageContainer: PackageContainer, CustomStri
 
     /// This is used to remember if tools version of a particular version is
     /// valid or not.
-    internal var validToolsVersionsCache = ThreadSafeKeyValueStore<Version, Bool>()
+    package var validToolsVersionsCache = ThreadSafeKeyValueStore<Version, Bool>()
 
     init(
         package: PackageReference,

Sources/Workspace/ToolsVersionSpecificationRewriter.swift

@@ -83,7 +83,7 @@ public struct ToolsVersionSpecificationWriter {
     }
 
     /// An error that causes the access to a manifest to fails.
-    struct ManifestAccessError: Error, CustomStringConvertible {
+    package struct ManifestAccessError: Error, CustomStringConvertible {
         public init(_ kind: Kind, at path: AbsolutePath) {
             self.kind = kind
             self.path = path

Sources/Workspace/Workspace+State.swift

@@ -36,7 +36,7 @@ public actor WorkspaceState {
     /// storage
     private let storage: WorkspaceStateStorage
 
-    init(
+    package init(
         fileSystem: FileSystem,
         storageDirectory: Basics.AbsolutePath,
         initializationWarningHandler: (String) -> Void