Merge pull request swiftlang#456 from swiftlang/upward-link-deps

Add an "upward" link library type for BuildDependencyInfo

Author: bob-wilson

Sources/SWBBuildService/BuildDependencyInfo.swift

@@ -117,6 +117,7 @@ package struct BuildDependencyInfo: Codable {
             package enum LibraryType: String, Codable, Sendable {
                 case dynamic
                 case `static`
+                case upward
                 case unknown
             }
 
@@ -434,9 +435,11 @@ extension BuildDependencyInfo {
     /// - remark: This is written somewhat generically (with the callback blocks) in the hopes that `LinkageDependencyResolver.dependencies(for:...)` can someday adopt it, as the general approach was stolen from there.
     package static func findLinkedInputsFromBuildSettings(_ settings: Settings, addFramework: @Sendable (TargetDependencyInfo.Input) async -> Void, addLibrary: @Sendable (TargetDependencyInfo.Input) async -> Void, addError: @Sendable (String) async -> Void) async {
         await LdLinkerSpec.processLinkerSettingsForLibraryOptions(settings: settings) { macro, flag, stem in
-            await addFramework(TargetDependencyInfo.Input(inputType: .framework, name: .stem(stem), linkType: .searchPath, libraryType: .dynamic))
+            let libType: TargetDependencyInfo.Input.LibraryType = (flag == "-upward_framework") ? .upward : .dynamic
+            await addFramework(TargetDependencyInfo.Input(inputType: .framework, name: .stem(stem), linkType: .searchPath, libraryType: libType))
         } addLibrary: { macro, flag, stem in
-            await addLibrary(TargetDependencyInfo.Input(inputType: .library, name: .stem(stem), linkType: .searchPath, libraryType: .unknown))
+            let libType: TargetDependencyInfo.Input.LibraryType = (flag == "-upward-l") ? .upward : .unknown
+            await addLibrary(TargetDependencyInfo.Input(inputType: .library, name: .stem(stem), linkType: .searchPath, libraryType: libType))
         } addError: { error in
             await addError(error)
         }

Tests/SWBBuildServiceTests/BuildDependencyInfoTests.swift

@@ -313,6 +313,7 @@ import Foundation
                                     "-merge_framework MergeFwk",
                                     "-no_merge_framework NoMergeFwk",
                                     "-lazy_framework LazyFwk",
+                                    "-upward_framework UpwardFwk",
 
                                     // Apparently both of these uses of -Xlinker are valid
                                     "-Xlinker -reexport_framework -Xlinker XlinkXlinkFwk",
@@ -328,6 +329,7 @@ import Foundation
                                     "-merge-lMergeLib",
                                     "-no_merge-lNoMergeLib",
                                     "-lazy-lLazyLib",
+                                    "-upward-lUpwardLib",
 
                                     "-Xlinker -reexport-lXlinkerLib",
                                     "-Wl,-reexport-lQuoteLib",
@@ -397,6 +399,15 @@ import Foundation
                     }
                 }
 
+                // Check upward framework
+                for fwkStem in ["UpwardFwk"] {
+                    results.checkTargetInputName(target, .stem(fwkStem)) { input in
+                        #expect(input.inputType == .framework)
+                        #expect(input.linkType == .searchPath)
+                        #expect(input.libraryType == .upward)
+                    }
+                }
+
                 // Check library linkage
                 for fwkStem in ["Lib", "WeakLib", "ReexportLib", "MergeLib", "NoMergeLib", "LazyLib"] {
                     results.checkTargetInputName(target, .stem(fwkStem)) { input in
@@ -413,6 +424,15 @@ import Foundation
                     }
                 }
 
+                // Check upward library
+                for fwkStem in ["UpwardLib"] {
+                    results.checkTargetInputName(target, .stem(fwkStem)) { input in
+                        #expect(input.inputType == .library)
+                        #expect(input.linkType == .searchPath)
+                        #expect(input.libraryType == .upward)
+                    }
+                }
+
                 results.checkNoMoreTargetInputs(target)
 
                 results.checkTargetOutputPath(target, "/Applications/AppTarget.app")