Add plugin to autogenerate windows installer content

Package.swift

@@ -413,6 +413,13 @@ let package = Package(
                 verb: "cmake-smoke-test",
                 description: "Build Swift Build using CMake for validation purposes"
             ))
+        ),
+        .plugin(
+            name: "generate-windows-installer-component-groups",
+            capability: .command(intent: .custom(
+                verb: "generate-windows-installer-component-groups",
+                description: "Generate XML fragments for cli.wxs in swift-installer-scripts"
+            ))
         )
     ],
     swiftLanguageModes: [.v5, .v6],

Plugins/generate-windows-installer-component-groups/generate-windows-installer-component-groups.swift

@@ -0,0 +1,64 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+import PackagePlugin
+import Foundation
+
+@main
+struct GenerateWindowsInstallerComponentGroups: CommandPlugin {
+    func performCommand(context: PluginContext, arguments: [String]) async throws {
+        var librariesComponent = #"    <ComponentGroup Id="SwiftBuild" Directory="_usr_bin">\#n"#
+        var resourcesComponents = ""
+        var groupRefs = #"      <ComponentGroupRef Id="SwiftBuild" />\#n"#
+        var directories = #"                <Directory Id="_usr_share_pm" Name="pm">\#n"#
+        for target in context.package.targets.sorted(by: { $0.name < $1.name }).filter({ !["SWBTestSupport", "SwiftBuildTestSupport"].contains($0.name) }) {
+            guard let sourceModule = target.sourceModule, sourceModule.kind == .generic else {
+                continue
+            }
+            librariesComponent += #"""
+                  <Component>
+                    <File Source="$(ToolchainRoot)\usr\bin\\#(sourceModule.name).dll" />
+                  </Component>
+
+            """#
+
+            let resources = sourceModule.sourceFiles.filter { resource in resource.type == .resource && ["xcspec", "xcbuildrule"].contains(resource.url.pathExtension) }
+            if !resources.isEmpty {
+                groupRefs += #"      <ComponentGroupRef Id="\#(sourceModule.name)Resources" />\#n"#
+                directories += #"                  <Directory Id="_usr_share_pm_\#(sourceModule.name)" Name="SwiftBuild_\#(sourceModule.name).resources" />\#n"#
+                resourcesComponents += #"    <ComponentGroup Id="\#(sourceModule.name)Resources" Directory="_usr_share_pm_\#(sourceModule.name)">\#n"#
+                for resource in resources  {
+                    resourcesComponents += #"""
+                      <Component>
+                        <File Source="$(ToolchainRoot)\usr\share\pm\SwiftBuild_\#(sourceModule.name).resources\\#(resource.url.lastPathComponent)" />
+                      </Component>
+
+                """#
+                }
+                resourcesComponents += "    </ComponentGroup>\n"
+            }
+        }
+        librariesComponent += "    </ComponentGroup>\n"
+        directories += "                </Directory>\n"
+
+        print("Component Groups")
+        print(String(repeating: "-", count: 80))
+        print(librariesComponent)
+        print(resourcesComponents)
+        print("Group Refs")
+        print(String(repeating: "-", count: 80))
+        print(groupRefs)
+        print("Directories")
+        print(String(repeating: "-", count: 80))
+        print(directories)
+    }
+}