Deprecate additional multi-bundle-related properties

Sources/SwiftDocC/DocumentationService/Convert/ConvertService.swift

@@ -267,7 +267,7 @@ public struct ConvertService: DocumentationService {
             .compactMap { (value, isDocumentationExtensionContent) -> (ResolvedTopicReference, RenderReferenceStore.TopicContent)? in
                 let (topicReference, article) = value
 
-                guard let bundle = context.bundle(identifier: topicReference.bundleIdentifier) else { return nil }
+                guard let bundle = context.bundle, bundle.identifier == topicReference.bundleIdentifier else { return nil }
                 let renderer = DocumentationContentRenderer(documentationContext: context, bundle: bundle)
 
                 let documentationNodeKind: DocumentationNode.Kind = isDocumentationExtensionContent ? .unknownSymbol : .article

Sources/SwiftDocC/Infrastructure/DocumentationContext.swift

@@ -147,6 +147,7 @@ public class DocumentationContext {
         }
     }
 
+    /// The documentation bundle that is registered with the context.
     var bundle: DocumentationBundle?
 
     /// A collection of configuration for this context.
@@ -362,7 +363,20 @@ public class DocumentationContext {
     }
 
     /// The documentation bundles that are currently registered with the context.
+    @available(*, deprecated, message: "Use 'bundle' instead. This deprecated API will be removed after 6.2 is released")
     public var registeredBundles: some Collection<DocumentationBundle> {
+        _registeredBundles
+    }
+
+    /// Returns the `DocumentationBundle` with the given `identifier` if it's registered with the context, otherwise `nil`.
+    @available(*, deprecated, message: "Use 'bundle' instead. This deprecated API will be removed after 6.2 is released")
+    public func bundle(identifier: String) -> DocumentationBundle? {
+        _bundle(identifier: identifier)
+    }
+
+    // Remove these  when removing `registeredBundles` and `bundle(identifier:)`.
+    // These exist so that internal code that need to be compatible with legacy data providers can access the bundles without deprecation warnings.
+    var _registeredBundles: [DocumentationBundle] {
         switch dataProvider {
         case .legacy(let legacyDataProvider):
             Array(legacyDataProvider.bundles.values)
@@ -371,8 +385,7 @@ public class DocumentationContext {
         }
     }
 
-    /// Returns the `DocumentationBundle` with the given `identifier` if it's registered with the context, otherwise `nil`.
-    public func bundle(identifier: String) -> DocumentationBundle? {
+    func _bundle(identifier: String) -> DocumentationBundle? {
         switch dataProvider {
         case .legacy(let legacyDataProvider):
             legacyDataProvider.bundles[identifier]
@@ -2678,7 +2691,7 @@ public class DocumentationContext {
      - Throws: ``ContextError/notFound(_:)` if a resource with the given was not found.
      */
     public func resource(with identifier: ResourceReference, trait: DataTraitCollection = .init()) throws -> Data {
-        guard let bundle = bundle(identifier: identifier.bundleIdentifier),
+        guard let bundle,
               let assetManager = assetManagers[identifier.bundleIdentifier],
               let asset = assetManager.allData(named: identifier.path) else {
             throw ContextError.notFound(identifier.url)

Sources/SwiftDocC/Infrastructure/Link Resolution/LinkResolver.swift

@@ -93,7 +93,7 @@ public class LinkResolver {
 
         // Check if this is a link to an external documentation source that should have previously been resolved in `DocumentationContext.preResolveExternalLinks(...)`
         if let bundleID = unresolvedReference.bundleIdentifier,
-           !context.registeredBundles.contains(where: { $0.identifier == bundleID || urlReadablePath($0.displayName) == bundleID })
+           !context._registeredBundles.contains(where: { $0.identifier == bundleID || urlReadablePath($0.displayName) == bundleID })
         {
             return .failure(unresolvedReference, TopicReferenceResolutionErrorInfo("No external resolver registered for \(bundleID.singleQuoted)."))
         }
@@ -171,7 +171,8 @@ private final class FallbackResolverBasedLinkResolver {
         // Check if a fallback reference resolver should resolve this
         let referenceBundleIdentifier = unresolvedReference.bundleIdentifier ?? parent.bundleIdentifier
         guard let fallbackResolver = context.configuration.convertServiceConfiguration.fallbackResolver,
-              let knownBundleIdentifier = context.registeredBundles.first(where: { $0.identifier == referenceBundleIdentifier || urlReadablePath($0.displayName) == referenceBundleIdentifier })?.identifier,
+              // This uses an underscored internal variant of `registeredBundles` to avoid deprecation warnings and remain compatible with legacy data providers.
+              let knownBundleIdentifier = context._registeredBundles.first(where: { $0.identifier == referenceBundleIdentifier || urlReadablePath($0.displayName) == referenceBundleIdentifier })?.identifier,
               fallbackResolver.bundleIdentifier == knownBundleIdentifier
         else {
             return nil
@@ -190,7 +191,8 @@ private final class FallbackResolverBasedLinkResolver {
         )
         allCandidateURLs.append(alreadyResolved.url)
 
-        let currentBundle = context.bundle(identifier: knownBundleIdentifier)!
+        // This uses an underscored internal variant of `bundle(identifier:)` to avoid deprecation warnings and remain compatible with legacy data providers.
+        let currentBundle = context._bundle(identifier: knownBundleIdentifier)!
         if !isCurrentlyResolvingSymbolLink {
             // First look up articles path
             allCandidateURLs.append(contentsOf: [

Sources/SwiftDocC/LinkTargets/LinkDestinationSummary.swift

@@ -311,7 +311,7 @@ public extension DocumentationNode {
         renderNode: RenderNode,
         includeTaskGroups: Bool = true
     ) -> [LinkDestinationSummary] {
-        guard let bundle = context.bundle(identifier: reference.bundleIdentifier) else {
+        guard let bundle = context.bundle, bundle.identifier == reference.bundleIdentifier else {
             // Don't return anything for external references that don't have a bundle in the context.
             return []
         }

Sources/SwiftDocC/Model/Rendering/LinkTitleResolver.swift

@@ -27,7 +27,7 @@ struct LinkTitleResolver {
     /// - Parameter page: The page for which to resolve the title.
     /// - Returns: The variants of the link title for this page, or `nil` if the page doesn't exist in the context.
     func title(for page: DocumentationNode) -> DocumentationDataVariants<String>? {
-        if let bundle = context.bundle(identifier: page.reference.bundleIdentifier),
+        if let bundle = context.bundle,
            let directive = page.markup.child(at: 0) as? BlockDirective {
 
             var problems = [Problem]()

Tests/SwiftDocCTests/Infrastructure/DocumentationContext/DocumentationContextTests.swift

@@ -3233,7 +3233,7 @@ let expected = """
         ])
 
         // Verify that the links are resolved in the render model.
-        let bundle = try XCTUnwrap(context.registeredBundles.first)
+        let bundle = try XCTUnwrap(context.bundle)
         let converter = DocumentationNodeConverter(bundle: bundle, context: context)
         let renderNode = try converter.convert(entity)
 

Tests/SwiftDocCUtilitiesTests/ConvertActionTests.swift

@@ -2851,8 +2851,7 @@ class ConvertActionTests: XCTestCase {
         )
         let (_, context) = try await action.perform(logHandle: .none)
 
-        XCTAssertEqual(context.registeredBundles.count, 1)
-        let bundle = try XCTUnwrap(context.registeredBundles.first, "Should have registered the generated test bundle.")
+        let bundle = try XCTUnwrap(context.bundle, "Should have registered the generated test bundle.")
         XCTAssertEqual(bundle.displayName, "MyKit")
         XCTAssertEqual(bundle.identifier, "MyKit")
     }
@@ -2930,8 +2929,7 @@ class ConvertActionTests: XCTestCase {
         )
         let (_, context) = try await action.perform(logHandle: .none)
 
-        XCTAssertEqual(context.registeredBundles.count, 1)
-        let bundle = try XCTUnwrap(context.registeredBundles.first, "Should have registered the generated test bundle.")
+        let bundle = try XCTUnwrap(context.bundle, "Should have registered the generated test bundle.")
         XCTAssertEqual(bundle.displayName, "Something")
         XCTAssertEqual(bundle.identifier, "com.example.test")
     }