Support local, register package (#16)

* add localSourceControl, fileSystem
* add registry

Sources/LicenseProviderExec/WorkSpacePackage.swift

@@ -8,6 +8,7 @@ struct WorkSpacePackage: Decodable, Hashable {
   let name: String
   let location: URL
   let subPath: String
+  let kind: Kind
 
   enum PackageRefCodingKeys: CodingKey {
     case packageRef
@@ -17,6 +18,7 @@ struct WorkSpacePackage: Decodable, Hashable {
   enum CodingKeys: CodingKey {
     case name
     case location
+    case kind
   }
 
   init(from decoder: Decoder) throws {
@@ -30,5 +32,15 @@ struct WorkSpacePackage: Decodable, Hashable {
 
     self.name = try container.decode(String.self, forKey: .name)
     self.location = try container.decode(URL.self, forKey: .location)
+    self.kind = try container.decode(Kind.self, forKey: .kind)
+  }
+}
+
+extension WorkSpacePackage {
+  enum Kind: String, Decodable {
+    case remoteSourceControl
+    case localSourceControl
+    case fileSystem
+    case registry
   }
 }

Sources/LicenseProviderExec/main.swift

@@ -41,10 +41,22 @@ let workspace = try JSONDecoder().decode(WorkSpace.self, from: jsonData)
 var packages: [WorkSpacePackage: String] = [:]
 
 for package in workspace.packages {
-  let subPath = sourcePackagesPath.appendingPathComponent("checkouts").appendingPathComponent(
-    package.subPath)
+  let subPath: URL? = switch package.kind {
+  case .localSourceControl, .fileSystem:
+    package.location
+  case .remoteSourceControl:
+    sourcePackagesPath
+      .appendingPathComponent("checkouts")
+      .appendingPathComponent(package.subPath)
+  case .registry:
+    nil
+  }
+
+  guard let subPath else { continue }
+
   let contents = try FileManager.default.contentsOfDirectory(
-    at: subPath, includingPropertiesForKeys: nil
+    at: subPath,
+    includingPropertiesForKeys: nil
   ).filter { path in
     let pathWithoutExtension = path.deletingPathExtension()