[Fix] Wrong assumption of Package.revision being non-optional

README.md

@@ -268,6 +268,10 @@ The Settings Bundle and the UI-components are currently localized in the followi
 
 > If a language has mistakes or is missing, feel free to create an issue or open a pull request.
 
+## Known limitations
+
+- SwiftPackageList won't include license files from packages that are located in a registry like Artifactory.
+
 
 ## License
 

Sources/SwiftPackageList/Package.swift

@@ -28,9 +28,9 @@ public struct Package: Sendable, Hashable, Codable {
 
     /// The exact revision/commit.
     ///
-    /// This is always present, regardless if the package's dependency-rule is version or branch.
-    public let revision: String
-    
+    /// Could be `nil` if the package is located in a registry.
+    public let revision: String?
+
     /// The URL to the git-repository.
     public let repositoryURL: URL
 
@@ -44,7 +44,7 @@ public struct Package: Sendable, Hashable, Codable {
         name: String,
         version: String?,
         branch: String?,
-        revision: String,
+        revision: String?,
         repositoryURL: URL,
         license: String?
     ) {

Sources/SwiftPackageListCore/Files/PackageResolved.swift

@@ -105,7 +105,7 @@ extension PackageResolved.Storage {
     struct V2: Decodable {
         struct Pin: Decodable {
             struct State: Decodable {
-                let revision: String
+                let revision: String?
                 let version: String?
                 let branch: String?
             }

Tests/SwiftPackageListCoreTests/PackageResolvedTests.swift

@@ -67,7 +67,29 @@ final class PackageResolvedTests: XCTestCase {
             XCTAssertEqual((error as? RuntimeError)?.description, "Version 999 of Package.resolved is not supported")
         }
     }
-
+
+    func testPackagesFromRegistry() throws {
+        let url = Bundle.module.url(
+            forResource: "Package_registry",
+            withExtension: "resolved",
+            subdirectory: "Resources/PackageResolved"
+        )
+        let unwrappedURL = try XCTUnwrap(url)
+        let packageResolved = try PackageResolved(url: unwrappedURL)
+
+        guard case .v2(let packageResolved) = packageResolved.storage else {
+            XCTFail("\(unwrappedURL.path) was not recognized as v2")
+            return
+        }
+        XCTAssertEqual(packageResolved.version, 2)
+        XCTAssertEqual(packageResolved.pins[0].identity, "package.in.registry.like.artifactory")
+        XCTAssertEqual(packageResolved.pins[0].kind, "registry")
+        XCTAssertEqual(packageResolved.pins[0].location, "")
+        XCTAssertNil(packageResolved.pins[0].state.branch)
+        XCTAssertNil(packageResolved.pins[0].state.revision)
+        XCTAssertEqual(packageResolved.pins[0].state.version, "1.2.3")
+    }
+
     func testVersion1IdentityConstruction() {
         let remotePin = PackageResolved.Storage.V1.Object.Pin(
             package: "",

Tests/SwiftPackageListCoreTests/Resources/PackageResolved/Package_registry.resolved

@@ -0,0 +1,13 @@
+{
+    "pins": [
+        {
+            "identity" : "package.in.registry.like.artifactory",
+            "kind" : "registry",
+            "location" : "",
+            "state" : {
+                "version" : "1.2.3"
+            }
+        }
+    ],
+    "version": 2
+}