Add a couple missing SwiftPM options

Documentation/Configuration File.md

@@ -20,10 +20,12 @@ The structure of the file is currently not guaranteed to be stable. Options may
   - `swiftSDKsDirectory: string`: Equivalent to SwiftPM's `--swift-sdks-path` option.
   - `swiftSDK: string`: Equivalent to SwiftPM's `--swift-sdk` option.
   - `triple: string`: Equivalent to SwiftPM's `--triple` option.
+  - `traits: string[]`: Traits to enable for the package. Equivalent to SwiftPM's `--traits` option.
   - `cCompilerFlags: string[]`: Extra arguments passed to the compiler for C files. Equivalent to SwiftPM's `-Xcc` option.
   - `cxxCompilerFlags: string[]`: Extra arguments passed to the compiler for C++ files. Equivalent to SwiftPM's `-Xcxx` option.
   - `swiftCompilerFlags: string[]`: Extra arguments passed to the compiler for Swift files. Equivalent to SwiftPM's `-Xswiftc` option.
   - `linkerFlags: string[]`: Extra arguments passed to the linker. Equivalent to SwiftPM's `-Xlinker` option.
+  - `buildToolsSwiftCompilerFlags: string[]`: Extra arguments passed to the compiler for Swift files or plugins. Equivalent to SwiftPM's `-Xbuild-tools-swiftc` option.
   - `disableSandbox: boolean`: Disables running subprocesses from SwiftPM in a sandbox. Equivalent to SwiftPM's `--disable-sandbox` option. Useful when running `sourcekit-lsp` in a sandbox because nested sandboxes are not supported.
 - `compilationDatabase`: Dictionary with the following keys, defining options for workspaces with a compilation database.
   - `searchPaths: string[]`: Additional paths to search for a compilation database, relative to a workspace root.

Sources/BuildSystemIntegration/SwiftPMBuildSystem.swift

@@ -132,6 +132,7 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
   private let swiftPMWorkspace: Workspace
 
   private let pluginConfiguration: PluginConfiguration
+  private let traitConfiguration: TraitConfiguration
 
   /// A `ObservabilitySystem` from `SwiftPM` that logs.
   private let observabilitySystem: ObservabilitySystem
@@ -249,6 +250,7 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
         toolchain: hostSwiftPMToolchain,
         isManifestSandboxEnabled: !(options.swiftPMOrDefault.disableSandbox ?? false),
         cacheDir: location.sharedManifestsCacheDirectory,
+        extraManifestFlags: options.swiftPMOrDefault.buildToolsSwiftCompilerFlags,
         importRestrictions: configuration.manifestImportRestrictions
       )
     )
@@ -294,7 +296,7 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
       fileSystem: localFileSystem,
       cacheDir: location.pluginWorkingDirectory.appending("cache"),
       toolchain: hostSwiftPMToolchain,
-      extraPluginSwiftCFlags: [],
+      extraPluginSwiftCFlags: options.swiftPMOrDefault.buildToolsSwiftCompilerFlags ?? [],
       enableSandbox: !(options.swiftPMOrDefault.disableSandbox ?? false)
     )
     self.pluginConfiguration = PluginConfiguration(
@@ -303,6 +305,10 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
       disableSandbox: options.swiftPMOrDefault.disableSandbox ?? false
     )
 
+    self.traitConfiguration = TraitConfiguration(
+      enabledTraits: options.swiftPMOrDefault.traits.flatMap(Set.init)
+    )
+
     packageLoadingQueue.async {
       await orLog("Initial package loading") {
         // Schedule an initial generation of the build graph. Once the build graph is loaded, the build system will send
@@ -355,6 +361,7 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
         toolsBuildParameters: toolsBuildParameters,
         packageGraph: modulesGraph,
         pluginConfiguration: pluginConfiguration,
+        traitConfiguration: traitConfiguration,
         disableSandbox: options.swiftPMOrDefault.disableSandbox ?? false,
         scratchDirectory: swiftPMWorkspace.location.scratchDirectory.asURL,
         fileSystem: localFileSystem,
@@ -635,10 +642,14 @@ package actor SwiftPMBuildSystem: BuiltInBuildSystem {
     if let swiftSDK = options.swiftPMOrDefault.swiftSDK {
       arguments += ["--swift-sdk", swiftSDK]
     }
+    if let traits = options.swiftPMOrDefault.traits {
+      arguments += ["--traits", traits.joined(separator: ",")]
+    }
     arguments += options.swiftPMOrDefault.cCompilerFlags?.flatMap { ["-Xcc", $0] } ?? []
     arguments += options.swiftPMOrDefault.cxxCompilerFlags?.flatMap { ["-Xcxx", $0] } ?? []
     arguments += options.swiftPMOrDefault.swiftCompilerFlags?.flatMap { ["-Xswiftc", $0] } ?? []
     arguments += options.swiftPMOrDefault.linkerFlags?.flatMap { ["-Xlinker", $0] } ?? []
+    arguments += options.swiftPMOrDefault.buildToolsSwiftCompilerFlags?.flatMap { ["-Xbuild-tools-swiftc", $0] } ?? []
     switch options.backgroundPreparationModeOrDefault {
     case .build: break
     case .noLazy: arguments += ["--experimental-prepare-for-indexing", "--experimental-prepare-for-indexing-no-lazy"]

Sources/SKOptions/SourceKitLSPOptions.swift

@@ -53,6 +53,9 @@ public struct SourceKitLSPOptions: Sendable, Codable, Equatable {
     /// Equivalent to SwiftPM's `--triple` option.
     public var triple: String?
 
+    /// Traits to enable for the package. Equivalent to SwiftPM's `--traits` option.
+    public var traits: [String]?
+
     /// Extra arguments passed to the compiler for C files. Equivalent to SwiftPM's `-Xcc` option.
     public var cCompilerFlags: [String]?
 
@@ -65,6 +68,10 @@ public struct SourceKitLSPOptions: Sendable, Codable, Equatable {
     /// Extra arguments passed to the linker. Equivalent to SwiftPM's `-Xlinker` option.
     public var linkerFlags: [String]?
 
+    /// Extra arguments passed to the compiler for Swift files or plugins. Equivalent to SwiftPM's
+    /// `-Xbuild-tools-swiftc` option.
+    public var buildToolsSwiftCompilerFlags: [String]?
+
     /// Disables running subprocesses from SwiftPM in a sandbox. Equivalent to SwiftPM's `--disable-sandbox` option.
     /// Useful when running `sourcekit-lsp` in a sandbox because nested sandboxes are not supported.
     public var disableSandbox: Bool?
@@ -75,21 +82,25 @@ public struct SourceKitLSPOptions: Sendable, Codable, Equatable {
       swiftSDKsDirectory: String? = nil,
       swiftSDK: String? = nil,
       triple: String? = nil,
+      traits: [String]? = nil,
       cCompilerFlags: [String]? = nil,
       cxxCompilerFlags: [String]? = nil,
       swiftCompilerFlags: [String]? = nil,
       linkerFlags: [String]? = nil,
+      buildToolsSwiftCompilerFlags: [String]? = nil,
       disableSandbox: Bool? = nil
     ) {
       self.configuration = configuration
       self.scratchPath = scratchPath
       self.swiftSDKsDirectory = swiftSDKsDirectory
       self.swiftSDK = swiftSDK
       self.triple = triple
+      self.traits = traits
       self.cCompilerFlags = cCompilerFlags
       self.cxxCompilerFlags = cxxCompilerFlags
       self.swiftCompilerFlags = swiftCompilerFlags
       self.linkerFlags = linkerFlags
+      self.buildToolsSwiftCompilerFlags = buildToolsSwiftCompilerFlags
       self.disableSandbox = disableSandbox
     }
 
@@ -100,10 +111,12 @@ public struct SourceKitLSPOptions: Sendable, Codable, Equatable {
         swiftSDKsDirectory: override?.swiftSDKsDirectory ?? base.swiftSDKsDirectory,
         swiftSDK: override?.swiftSDK ?? base.swiftSDK,
         triple: override?.triple ?? base.triple,
+        traits: override?.traits ?? base.traits,
         cCompilerFlags: override?.cCompilerFlags ?? base.cCompilerFlags,
         cxxCompilerFlags: override?.cxxCompilerFlags ?? base.cxxCompilerFlags,
         swiftCompilerFlags: override?.swiftCompilerFlags ?? base.swiftCompilerFlags,
         linkerFlags: override?.linkerFlags ?? base.linkerFlags,
+        buildToolsSwiftCompilerFlags: override?.buildToolsSwiftCompilerFlags ?? base.buildToolsSwiftCompilerFlags,
         disableSandbox: override?.disableSandbox ?? base.disableSandbox
       )
     }

config.schema.json

@@ -217,6 +217,14 @@
       "description" : "Options for SwiftPM workspaces.",
       "markdownDescription" : "Options for SwiftPM workspaces.",
       "properties" : {
+        "buildToolsSwiftCompilerFlags" : {
+          "description" : "Extra arguments passed to the compiler for Swift files or plugins. Equivalent to SwiftPM's `-Xbuild-tools-swiftc` option.",
+          "items" : {
+            "type" : "string"
+          },
+          "markdownDescription" : "Extra arguments passed to the compiler for Swift files or plugins. Equivalent to SwiftPM's `-Xbuild-tools-swiftc` option.",
+          "type" : "array"
+        },
         "cCompilerFlags" : {
           "description" : "Extra arguments passed to the compiler for C files. Equivalent to SwiftPM's `-Xcc` option.",
           "items" : {
@@ -278,6 +286,14 @@
           "markdownDescription" : "Equivalent to SwiftPM's `--swift-sdks-path` option.",
           "type" : "string"
         },
+        "traits" : {
+          "description" : "Traits to enable for the package. Equivalent to SwiftPM's `--traits` option.",
+          "items" : {
+            "type" : "string"
+          },
+          "markdownDescription" : "Traits to enable for the package. Equivalent to SwiftPM's `--traits` option.",
+          "type" : "array"
+        },
         "triple" : {
           "description" : "Equivalent to SwiftPM's `--triple` option.",
           "markdownDescription" : "Equivalent to SwiftPM's `--triple` option.",