We can not import SwiftBuild on all platforms

Author: pmattos

Sources/SwiftBuildSupport/PackagePIFBuilder+Helpers.swift

@@ -55,6 +55,8 @@ import struct PackageGraph.ResolvedProduct
 
 import func PackageLoading.pkgConfigArgs
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 
 // MARK: - PIF GUID Helpers
@@ -1127,3 +1129,5 @@ extension UserDefaults {
         }
     }
 }
+
+#endif

Sources/SwiftBuildSupport/PackagePIFBuilder+Plugins.swift

@@ -17,6 +17,8 @@ import let Basics.localFileSystem
 import enum Basics.Sandbox
 import struct Basics.SourceControlURL
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 
 extension PackagePIFBuilder {
@@ -132,3 +134,5 @@ extension PackagePIFBuilder {
         }
     }
 }
+
+#endif

Sources/SwiftBuildSupport/PackagePIFBuilder.swift

@@ -30,6 +30,8 @@ import struct PackageGraph.ModulesGraph
 import struct PackageGraph.ResolvedModule
 import struct PackageGraph.ResolvedPackage
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 
 typealias GUID = SwiftBuild.ProjectModel.GUID
@@ -683,3 +685,5 @@ public struct SourceLocation: Sendable {
         self.line = line
     }
 }
+
+#endif

Sources/SwiftBuildSupport/PackagePIFProjectBuilder+Modules.swift

@@ -25,6 +25,8 @@ import class PackageModel.SystemLibraryModule
 import struct PackageGraph.ResolvedModule
 import struct PackageGraph.ResolvedPackage
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 
 /// Extension to create PIF **modules** for a given package.
@@ -862,3 +864,5 @@ extension PackagePIFProjectBuilder {
         self.builtModulesAndProducts.append(systemModule)
     }
 }
+
+#endif

Sources/SwiftBuildSupport/PackagePIFProjectBuilder+Products.swift

@@ -27,6 +27,8 @@ import struct PackageGraph.ResolvedModule
 import struct PackageGraph.ResolvedPackage
 import struct PackageGraph.ResolvedProduct
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 
 /// Extension to create PIF **products** for a given package.
@@ -984,3 +986,5 @@ private struct PackageRegistrySignature: Encodable {
     let source: Source
     let formatVersion = 2
 }
+
+#endif

Sources/SwiftBuildSupport/PackagePIFProjectBuilder.swift

@@ -30,6 +30,8 @@ import struct PackageGraph.ResolvedPackage
 import struct PackageLoading.FileRuleDescription
 import struct PackageLoading.TargetSourcesBuilder
 
+#if canImport(SwiftBuild)
+
 import enum SwiftBuild.ProjectModel
 import struct SwiftBuild.SwiftBuildFileType
 import struct SwiftBuild.Pair
@@ -534,3 +536,5 @@ struct PackagePIFProjectBuilder {
         !self.dynamicLibraryProductNames.contains(targetName)
     }
 }
+
+#endif