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// Copyright 2016 The Tulsi Authors. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
import Foundation
/// Provides a set of project paths to stub Info.plist files to be used by generated targets.
struct StubInfoPlistPaths {
let resourcesDirectory: String
let defaultStub: String
let watchOSStub: String
let watchOSAppExStub: String
func stubPlist(_ entry: RuleEntry) -> String {
switch entry.pbxTargetType! {
case .Watch1App, .Watch2App:
return watchOSStub
case .Watch1Extension, .Watch2Extension:
return watchOSAppExStub
case .MessagesExtension:
case .MessagesStickerPackExtension:
case .AppExtension:
return stubProjectPath(forRuleEntry: entry)
return defaultStub
func plistFilename(forRuleEntry ruleEntry: RuleEntry) -> String {
return "Stub_\(ruleEntry.label.asFullPBXTargetName!).plist"
func stubProjectPath(forRuleEntry ruleEntry: RuleEntry) -> String {
let fileName = plistFilename(forRuleEntry: ruleEntry)
return "\(resourcesDirectory)/\(fileName)"
/// Defines an object that can populate a PBXProject based on RuleEntry's.
protocol PBXTargetGeneratorProtocol: class {
static func getRunTestTargetBuildConfigPrefix() -> String
static func workingDirectoryForPBXGroup(_ group: PBXGroup) -> String
/// Returns a new PBXGroup instance appropriate for use as a top level project group.
static func mainGroupForOutputFolder(_ outputFolderURL: URL, workspaceRootURL: URL) -> PBXGroup
init(bazelPath: String,
bazelBinPath: String,
project: PBXProject,
buildScriptPath: String,
stubInfoPlistPaths: StubInfoPlistPaths,
tulsiVersion: String,
options: TulsiOptionSet,
localizedMessageLogger: LocalizedMessageLogger,
workspaceRootURL: URL,
suppressCompilerDefines: Bool,
redactWorkspaceSymlink: Bool)
/// Generates file references for the given file paths in the associated project without adding
/// them to an indexer target. The paths must be relative to the workspace root. If pathFilters is
/// non-nil, paths that do not match an entry in the pathFilters set will be omitted.
func generateFileReferencesForFilePaths(_ paths: [String], pathFilters: Set<String>?)
/// Registers the given Bazel rule and its transitive dependencies for inclusion by the Xcode
/// indexer, adding source files whose directories are present in pathFilters. The rule will
/// only be processed if it hasn't already (and therefore isn't in processedEntries).
/// - processedEntries: Map of RuleEntry to cumulative preprocessor framework search paths.
func registerRuleEntryForIndexer(_ ruleEntry: RuleEntry,
ruleEntryMap: RuleEntryMap,
pathFilters: Set<String>,
processedEntries: inout [RuleEntry: (NSOrderedSet)])
/// Generates indexer targets for rules that were previously registered through
/// registerRuleEntryForIndexer. This method may only be called once, after all rule entries have
/// been registered.
/// Returns a map of indexer targets, keyed by the name of the indexer.
func generateIndexerTargets() -> [String: PBXTarget]
/// Generates a legacy target that is added as a dependency of all build targets and invokes
/// the given script. The build action may be accessed by the script via the ACTION environment
/// variable.
func generateBazelCleanTarget(_ scriptPath: String, workingDirectory: String)
/// Generates project-level build configurations.
func generateTopLevelBuildConfigurations(_ buildSettingOverrides: [String: String])
/// Generates Xcode build targets that invoke Bazel for the given targets. For test-type rules,
/// non-compiling source file linkages are created to facilitate indexing of XCTests.
/// Throws if one of the RuleEntry instances is for an unsupported Bazel target type.
func generateBuildTargetsForRuleEntries(_ entries: Set<RuleEntry>,
ruleEntryMap: RuleEntryMap) throws
extension PBXTargetGeneratorProtocol {
func generateFileReferencesForFilePaths(_ paths: [String]) {
generateFileReferencesForFilePaths(paths, pathFilters: nil)
/// Concrete PBXProject target generator.
final class PBXTargetGenerator: PBXTargetGeneratorProtocol {
enum ProjectSerializationError: Error {
case buildFileIsNotContainedByProjectRoot
case generalFailure(String)
case unsupportedTargetType(String, String)
/// Names of Xcode build configurations to generate.
// NOTE: Must be kept in sync with the CONFIGURATION environment variable use in the build script.
static let buildConfigNames = ["Debug", "Release"]
/// Tuples consisting of a test runner config name and the base config name (from
/// buildConfigNames) that it inherits from.
static let testRunnerEnabledBuildConfigNames = ["Debug", "Release"].map({
(runTestTargetBuildConfigPrefix + $0, $0)
/// Prefix for special configs used when running XCTests that prevent compilation and linking of
/// any source files. This allows XCTest bundles to have associated test sources indexed by Xcode
/// but not compiled when testing (as they're compiled by Bazel and the generated project may be
/// missing information necessary to compile them anyway). Configs are generated for Debug and
/// Release builds.
// NOTE: This value needs to be kept in sync with the bazel_build script.
static let runTestTargetBuildConfigPrefix = "__TulsiTestRunner_"
static func getRunTestTargetBuildConfigPrefix() -> String {
return runTestTargetBuildConfigPrefix
/// Name of the static library target that will be used to accumulate all source file dependencies
/// in order to make their symbols available to the Xcode indexer.
static let IndexerTargetPrefix = "_idx_"
/// Rough sanity limit on indexer name length. Names may be slightly longer than this limit.
/// Empirically, 255 characters is the observed threshold for problems with file systems.
static let MaxIndexerNameLength = 180
// Name prefix for auto-generated nop-app extension targets necessary to get Xcode to debug watch
// Apps.
private static let watchAppExtensionTargetPrefix = "_tulsi_appex_"
/// Name of the legacy target that will be used to communicate with Bazel during Xcode clean
/// actions.
static let BazelCleanTarget = "_bazel_clean_"
/// Xcode variable name used to refer to the workspace root.
static let WorkspaceRootVarName = "TULSI_WR"
/// Symlink to the Bazel workspace
static let TulsiWorkspacePath = "tulsi-workspace"
/// Xcode variable name used to refer to the symlink generated by Bazel that contains all
/// workspace content.
static let BazelWorkspaceSymlinkVarName = "TULSI_BWRS"
/// Path to the Bazel executable.
let bazelPath: String
/// Location of the bazel bin symlink, relative to the workspace root.
let bazelBinPath: String
private(set) lazy var bazelGenfilesPath: String = { [unowned self] in
return self.bazelBinPath.replacingOccurrences(of: "-bin", with: "-genfiles")
/// The path to the Tulsi generated outputs root. For more information see tulsi_aspects.bzl
let tulsiIncludesPath = "_tulsi-includes/x/x"
let project: PBXProject
let buildScriptPath: String
let stubInfoPlistPaths: StubInfoPlistPaths
let tulsiVersion: String
let options: TulsiOptionSet
let localizedMessageLogger: LocalizedMessageLogger
let workspaceRootURL: URL
let suppressCompilerDefines: Bool
let redactWorkspaceSymlink: Bool
var bazelCleanScriptTarget: PBXLegacyTarget? = nil
/// Stores data about a given RuleEntry to be used in order to generate Xcode indexer targets.
private struct IndexerData {
/// Provides information about the RuleEntry instances supported by an IndexerData.
/// Specifically, NameInfoToken tuples provide the targetName, full target label hash, and
/// potentially the target configuration in order to differentiate between rules with the
/// same name but different paths and configurations.
struct NameInfoToken {
let targetName: String
let labelHash: Int
init(ruleEntry: RuleEntry) {
self.init(label: ruleEntry.label)
init(label: BuildLabel) {
targetName = label.targetName!
labelHash = label.hashValue
let indexerNameInfo: [NameInfoToken]
let dependencies: Set<BuildLabel>
let resolvedDependencies: Set<RuleEntry>
let preprocessorDefines: Set<String>
let otherCFlags: [String]
let otherSwiftFlags: [String]
let includes: [String]
let frameworkSearchPaths: [String]
let swiftIncludePaths: [String]
let deploymentTarget: DeploymentTarget
let buildPhase: PBXSourcesBuildPhase
let pchFile: BazelFileInfo?
let bridgingHeader: BazelFileInfo?
let enableModules: Bool
/// Returns the deploymentTarget as a string for an indexerName.
static func deploymentTargetLabel(_ deploymentTarget: DeploymentTarget) -> String {
return String(format: "%@_min%@",
/// Returns the deploymentTarget as a string for the indexerName.
var deploymentTargetLabel: String {
return IndexerData.deploymentTargetLabel(deploymentTarget)
/// Returns the full name that should be used when generating a target for this indexer.
var indexerName: String {
var fullName = ""
var fullHash = 0
for token in indexerNameInfo {
if fullName.isEmpty {
fullName = token.targetName
} else {
fullName += "_\(token.targetName)"
fullHash = fullHash &+ token.labelHash
return PBXTargetGenerator.indexerNameForTargetName(fullName,
hash: fullHash,
suffix: deploymentTargetLabel)
/// Returns an array of aliases for this indexer data. Each element is the full indexerName of
/// an IndexerData instance that has been merged into this IndexerData.
var supportedIndexingTargets: [String] {
var supportedTargets = [indexerName]
if indexerNameInfo.count > 1 {
for token in indexerNameInfo {
hash: token.labelHash,
suffix: deploymentTargetLabel))
return supportedTargets
/// Returns an array of indexing target names that this indexer depends on.
var indexerNamesForResolvedDependencies: [String] {
let parentDeploymentTargetLabel = self.deploymentTargetLabel
return { entry in
let deploymentTargetLabel: String
if let deploymentTarget = entry.deploymentTarget {
deploymentTargetLabel = IndexerData.deploymentTargetLabel(deploymentTarget)
} else {
deploymentTargetLabel = parentDeploymentTargetLabel
return PBXTargetGenerator.indexerNameForTargetName(entry.label.targetName!,
hash: entry.label.hashValue,
suffix: deploymentTargetLabel)
/// Indicates whether or not this indexer may be merged with the given indexer.
func canMergeWith(_ other: IndexerData) -> Bool {
if self.pchFile != other.pchFile || self.bridgingHeader != other.bridgingHeader {
return false
if !(preprocessorDefines == other.preprocessorDefines &&
enableModules == other.enableModules &&
otherCFlags == other.otherCFlags &&
otherSwiftFlags == other.otherSwiftFlags &&
frameworkSearchPaths == other.frameworkSearchPaths &&
includes == other.includes &&
swiftIncludePaths == other.swiftIncludePaths &&
deploymentTarget == other.deploymentTarget) {
return false
return true
/// Returns a new IndexerData instance that is the result of merging this indexer with another.
func merging(_ other: IndexerData) -> IndexerData {
let newDependencies = dependencies.union(other.dependencies)
let newResolvedDependencies = resolvedDependencies.union(other.resolvedDependencies)
let newName = indexerNameInfo + other.indexerNameInfo
let newBuildPhase = PBXSourcesBuildPhase()
newBuildPhase.files = buildPhase.files + other.buildPhase.files
return IndexerData(indexerNameInfo: newName,
dependencies: newDependencies,
resolvedDependencies: newResolvedDependencies,
preprocessorDefines: preprocessorDefines,
otherCFlags: otherCFlags,
otherSwiftFlags: otherSwiftFlags,
includes: includes,
frameworkSearchPaths: frameworkSearchPaths,
swiftIncludePaths: swiftIncludePaths,
deploymentTarget: deploymentTarget,
buildPhase: newBuildPhase,
pchFile: pchFile,
bridgingHeader: bridgingHeader,
enableModules: enableModules)
/// Registered indexers that will be modeled as static libraries.
private var staticIndexers = [String: IndexerData]()
/// Registered indexers that will be modeled as dynamic frameworks.
private var frameworkIndexers = [String: IndexerData]()
/// Maps the names of indexer targets to the generated target instance in the project. Values are
/// not guaranteed to be unique, as several targets may be merged into a single target during
/// optimization.
private var indexerTargetByName = [String: PBXTarget]()
static func workingDirectoryForPBXGroup(_ group: PBXGroup) -> String {
switch group.sourceTree {
case .SourceRoot:
if let relativePath = group.path, !relativePath.isEmpty {
return "${SRCROOT}/\(relativePath)"
return ""
case .Absolute:
return group.path!
assertionFailure("Group has an unexpected sourceTree type \(group.sourceTree)")
return ""
static func mainGroupForOutputFolder(_ outputFolderURL: URL, workspaceRootURL: URL) -> PBXGroup {
let outputFolder = outputFolderURL.path
let workspaceRoot = workspaceRootURL.path
let slashTerminatedOutputFolder = outputFolder + (outputFolder.hasSuffix("/") ? "" : "/")
let slashTerminatedWorkspaceRoot = workspaceRoot + (workspaceRoot.hasSuffix("/") ? "" : "/")
// If workspaceRoot == outputFolder, return a relative group with no path.
if slashTerminatedOutputFolder == slashTerminatedWorkspaceRoot {
return PBXGroup(name: "mainGroup", path: nil, sourceTree: .SourceRoot, parent: nil)
// If outputFolder contains workspaceRoot, return a relative group with the path from
// outputFolder to workspaceRoot
if workspaceRoot.hasPrefix(slashTerminatedOutputFolder) {
let index = workspaceRoot.index(workspaceRoot.startIndex, offsetBy: slashTerminatedOutputFolder.count)
let relativePath = String(workspaceRoot[index...])
return PBXGroup(name: "mainGroup",
path: relativePath,
sourceTree: .SourceRoot,
parent: nil)
// If workspaceRoot contains outputFolder, return a relative group using .. to walk up to
// workspaceRoot from outputFolder.
if outputFolder.hasPrefix(slashTerminatedWorkspaceRoot) {
let index = outputFolder.index(outputFolder.startIndex, offsetBy: slashTerminatedWorkspaceRoot.count + 1)
let pathToWalkBackUp = String(outputFolder[index...]) as NSString
let numberOfDirectoriesToWalk = pathToWalkBackUp.pathComponents.count
let relativePath = [String](repeating: "..", count: numberOfDirectoriesToWalk).joined(separator: "/")
return PBXGroup(name: "mainGroup",
path: relativePath,
sourceTree: .SourceRoot,
parent: nil)
return PBXGroup(name: "mainGroup",
path: workspaceRootURL.path,
sourceTree: .Absolute,
parent: nil)
/// Returns a project-relative path for the given BazelFileInfo.
private static func projectRefForBazelFileInfo(_ info: BazelFileInfo) -> String {
switch info.targetType {
case .generatedFile:
return "$(\(WorkspaceRootVarName))/\(info.fullPath)"
case .sourceFile:
return "$(\(BazelWorkspaceSymlinkVarName))/\(info.fullPath)"
/// Returns the default Deployment Target (iOS 9). This is just a sensible default
/// in the odd case that we didn't get a Deployment Target from the Aspect.
private static func defaultDeploymentTarget() -> DeploymentTarget {
return DeploymentTarget(platform: .ios, osVersion: "9.0")
/// Computed property to determine if USER_HEADER_SEARCH_PATHS should be set for Objective-C
/// targets.
var improvedImportAutocompletionFix: Bool {
return options[.ImprovedImportAutocompletionFix].commonValueAsBool ?? true
init(bazelPath: String,
bazelBinPath: String,
project: PBXProject,
buildScriptPath: String,
stubInfoPlistPaths: StubInfoPlistPaths,
tulsiVersion: String,
options: TulsiOptionSet,
localizedMessageLogger: LocalizedMessageLogger,
workspaceRootURL: URL,
suppressCompilerDefines: Bool = false,
redactWorkspaceSymlink: Bool = false) {
self.bazelPath = bazelPath
self.bazelBinPath = bazelBinPath
self.project = project
self.buildScriptPath = buildScriptPath
self.stubInfoPlistPaths = stubInfoPlistPaths
self.tulsiVersion = tulsiVersion
self.options = options
self.localizedMessageLogger = localizedMessageLogger
self.workspaceRootURL = workspaceRootURL
self.suppressCompilerDefines = suppressCompilerDefines
self.redactWorkspaceSymlink = redactWorkspaceSymlink
func generateFileReferencesForFilePaths(_ paths: [String], pathFilters: Set<String>?) {
if let pathFilters = pathFilters {
let filteredPaths = paths.filter(pathFilterFunc(pathFilters))
} else {
/// Registers the given Bazel rule and its transitive dependencies for inclusion by the Xcode
/// indexer, adding source files whose directories are present in pathFilters. The rule will
/// only be processed if it hasn't already (and therefore isn't in processedEntries).
/// - processedEntries: Map of RuleEntry to cumulative preprocessor framework search paths.
func registerRuleEntryForIndexer(_ ruleEntry: RuleEntry,
ruleEntryMap: RuleEntryMap,
pathFilters: Set<String>,
processedEntries: inout [RuleEntry: (NSOrderedSet)]) {
let includePathInProject = pathFilterFunc(pathFilters)
func includeFileInProject(_ info: BazelFileInfo) -> Bool {
return includePathInProject(info.fullPath)
func addFileReference(_ info: BazelFileInfo) {
let (_, fileReferences) = project.getOrCreateGroupsAndFileReferencesForPaths([info.fullPath])
fileReferences.first!.isInputFile = info.targetType == .sourceFile
func addBuildFileForRule(_ ruleEntry: RuleEntry) {
guard let buildFilePath = ruleEntry.buildFilePath, includePathInProject(buildFilePath) else {
// TODO(b/63628175): Clean this nested method to also retrieve framework_dir and framework_file
// from the ObjcProvider, for both static and dynamic frameworks.
func generateIndexerTargetGraphForRuleEntry(_ ruleEntry: RuleEntry) -> (NSOrderedSet) {
if let data = processedEntries[ruleEntry] {
return data
var frameworkSearchPaths = NSMutableOrderedSet()
defer {
processedEntries[ruleEntry] = (frameworkSearchPaths)
var resolvedDependecies = [RuleEntry]()
for dep in ruleEntry.dependencies {
guard let depEntry = ruleEntryMap.ruleEntry(buildLabel: dep, depender: ruleEntry) else {
comment: "Failure to look up a Bazel target that was expected to be present. The target label is %1$@",
values: dep.value)
let inheritedFrameworkSearchPaths = generateIndexerTargetGraphForRuleEntry(depEntry)
var defines = Set<String>()
if let ruleDefines = ruleEntry.objcDefines {
if !suppressCompilerDefines,
let ruleDefines = ruleEntry.attributes[.compiler_defines] as? [String], !ruleDefines.isEmpty {
let includes = NSMutableOrderedSet()
addIncludes(ruleEntry, toSet: includes)
// Search path entries are added for all framework imports, regardless of whether the
// framework bundles are allowed by the include filters. The search path excludes the bundle
// itself.
ruleEntry.frameworkImports.forEach() {
let fullPath = $0.fullPath as NSString
let rootedPath = "$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))/\(fullPath.deletingLastPathComponent)"
let sourceFileInfos = ruleEntry.sourceFiles.filter(includeFileInProject)
let nonARCSourceFileInfos = ruleEntry.nonARCSourceFiles.filter(includeFileInProject)
let frameworkFileInfos = ruleEntry.frameworkImports.filter(includeFileInProject)
let nonSourceVersionedFileInfos = ruleEntry.versionedNonSourceArtifacts.filter(includeFileInProject)
for target in ruleEntry.normalNonSourceArtifacts.filter(includeFileInProject) {
let path = target.fullPath
let (_, ref) = project.createGroupsAndFileReferenceForPath(path, underGroup: project.mainGroup)
ref.isInputFile = target.targetType == .sourceFile
// Indexer targets aren't needed:
// - if the target is a filegroup (we generate an indexer for what references the filegroup).
// - if the target has no source files (there's nothing to index!)
// - if the target is a test bundle (we generate proper targets for these).
if (sourceFileInfos.isEmpty &&
nonARCSourceFileInfos.isEmpty &&
frameworkFileInfos.isEmpty &&
|| ruleEntry.pbxTargetType?.isTest ?? false || ruleEntry.type == "filegroup" {
return (frameworkSearchPaths)
var localPreprocessorDefines = defines
let localIncludes = includes.mutableCopy() as! NSMutableOrderedSet
let otherCFlags = NSMutableArray()
let swiftIncludePaths = NSMutableOrderedSet()
let otherSwiftFlags = NSMutableArray()
addLocalSettings(ruleEntry, localDefines: &localPreprocessorDefines, localIncludes: localIncludes,
otherCFlags: otherCFlags, swiftIncludePaths: swiftIncludePaths, otherSwiftFlags: otherSwiftFlags)
addOtherSwiftFlags(ruleEntry, toArray: otherSwiftFlags)
addSwiftIncludes(ruleEntry, toSet: swiftIncludePaths)
let pchFile = BazelFileInfo(info: ruleEntry.attributes[.pch])
if let pchFile = pchFile, includeFileInProject(pchFile) {
let bridgingHeader = BazelFileInfo(info: ruleEntry.attributes[.bridging_header])
if let bridgingHeader = bridgingHeader, includeFileInProject(bridgingHeader) {
let enableModules = (ruleEntry.attributes[.enable_modules] as? Bool) == true
let (nonARCFiles, nonARCSettings) = generateFileReferencesAndSettingsForNonARCFileInfos(nonARCSourceFileInfos)
var fileReferences = generateFileReferencesForFileInfos(sourceFileInfos)
fileReferences.append(contentsOf: generateFileReferencesForFileInfos(frameworkFileInfos))
fileReferences.append(contentsOf: nonARCFiles)
var buildPhaseReferences: [PBXReference]
if nonSourceVersionedFileInfos.isEmpty {
buildPhaseReferences = [PBXReference]()
} else {
let versionedFileReferences = createReferencesForVersionedFileTargets(nonSourceVersionedFileInfos)
buildPhaseReferences = versionedFileReferences as [PBXReference]
buildPhaseReferences.append(contentsOf: fileReferences as [PBXReference])
let buildPhase = createBuildPhaseForReferences(buildPhaseReferences,
withPerFileSettings: nonARCSettings)
if !buildPhase.files.isEmpty {
let resolvedIncludes = localIncludes.array as! [String]
let deploymentTarget: DeploymentTarget
if let ruleDeploymentTarget = ruleEntry.deploymentTarget {
deploymentTarget = ruleDeploymentTarget
} else {
deploymentTarget = PBXTargetGenerator.defaultDeploymentTarget()
comment: "Rule Entry for %1$@ has no DeploymentTarget set. Defaulting to iOS 9.",
values: ruleEntry.label.value)
let indexerData = IndexerData(indexerNameInfo: [IndexerData.NameInfoToken(ruleEntry: ruleEntry)],
dependencies: ruleEntry.dependencies,
resolvedDependencies: Set(resolvedDependecies),
preprocessorDefines: localPreprocessorDefines,
otherCFlags: otherCFlags as! [String],
otherSwiftFlags: otherSwiftFlags as! [String],
includes: resolvedIncludes,
frameworkSearchPaths: frameworkSearchPaths.array as! [String],
swiftIncludePaths: swiftIncludePaths.array as! [String],
deploymentTarget: deploymentTarget,
buildPhase: buildPhase,
pchFile: pchFile,
bridgingHeader: bridgingHeader,
enableModules: enableModules)
let isSwiftRule = ruleEntry.attributes[.has_swift_info] as? Bool ?? false
if (isSwiftRule) {
frameworkIndexers[indexerData.indexerName] = indexerData
} else {
staticIndexers[indexerData.indexerName] = indexerData
return (frameworkSearchPaths)
func generateIndexerTargets() -> [String: PBXTarget] {
func generateIndexer(_ name: String,
indexerType: PBXTarget.ProductType,
data: IndexerData) {
let indexingTarget = project.createNativeTarget(name,
deploymentTarget: nil,
targetType: indexerType,
isIndexerTarget: true)
addConfigsForIndexingTarget(indexingTarget, data: data)
for name in data.supportedIndexingTargets {
indexerTargetByName[name] = indexingTarget
for (name, data) in staticIndexers {
generateIndexer(name, indexerType: PBXTarget.ProductType.StaticLibrary, data: data)
for (name, data) in frameworkIndexers {
generateIndexer(name, indexerType: PBXTarget.ProductType.Framework, data: data)
func linkDependencies(_ dataMap: [String: IndexerData]) {
for (name, data) in dataMap {
guard let indexerTarget = indexerTargetByName[name] else {
localizedMessageLogger.infoMessage("Unexpectedly failed to resolve indexer \(name)")
for depName in data.indexerNamesForResolvedDependencies {
guard let indexerDependency = indexerTargetByName[depName], indexerDependency !== indexerTarget else {
proxyType: PBXContainerItemProxy.ProxyType.targetReference,
inProject: project)
return indexerTargetByName
func generateBazelCleanTarget(_ scriptPath: String, workingDirectory: String = "") {
assert(bazelCleanScriptTarget == nil, "generateBazelCleanTarget may only be called once")
bazelCleanScriptTarget = project.createLegacyTarget(PBXTargetGenerator.BazelCleanTarget,
deploymentTarget: nil,
buildToolPath: "\(scriptPath)",
buildArguments: "\"\(bazelPath)\" \"\(bazelBinPath)\"",
buildWorkingDirectory: workingDirectory)
for target: PBXTarget in project.allTargets {
if target === bazelCleanScriptTarget {
proxyType: PBXContainerItemProxy.ProxyType.targetReference,
inProject: project,
first: true)
func generateTopLevelBuildConfigurations(_ buildSettingOverrides: [String: String] = [:]) {
var buildSettings = options.commonBuildSettings()
for (key, value) in buildSettingOverrides {
buildSettings[key] = value
buildSettings["ONLY_ACTIVE_ARCH"] = "YES"
// Fixes an Xcode "Upgrade to recommended settings" warning. Technically the warning only
// requires this to be added to the Debug build configuration but as code is never compiled
// anyway it doesn't hurt anything to set it on all configs.
buildSettings["ENABLE_TESTABILITY"] = "YES"
// Bazel sources are more or less ARC by default (the user has to use the special non_arc_srcs
// attribute for non-ARC) so the project is set to reflect that and per-file flags are used to
// override the default.
buildSettings["CLANG_ENABLE_OBJC_ARC"] = "YES"
// Bazel takes care of signing the generated applications, so Xcode's signing must be disabled.
buildSettings["CODE_SIGNING_REQUIRED"] = "NO"
buildSettings["CODE_SIGN_IDENTITY"] = ""
// Explicitly setting the FRAMEWORK_SEARCH_PATHS will allow Xcode to resolve references to the
// XCTest framework when performing Live issues analysis.
buildSettings["FRAMEWORK_SEARCH_PATHS"] = "$(PLATFORM_DIR)/Developer/Library/Frameworks";
// Prevent Xcode from replacing the Swift StdLib dylibs that Bazel already packaged.
var sourceDirectory = PBXTargetGenerator.workingDirectoryForPBXGroup(project.mainGroup)
if sourceDirectory.isEmpty {
sourceDirectory = "$(SRCROOT)"
// A variable pointing to the true root is provided for scripts that may need it.
buildSettings["\(PBXTargetGenerator.WorkspaceRootVarName)"] = sourceDirectory
// Bazel generates a symlink to a directory that collects all of the data needed for this
// workspace. While this is often identical to the workspace, it sometimes collects other paths
// and is the better option for most Xcode project path references.
// This directory is symlinked to `tulsi-workspace` during builds.
buildSettings["\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName)"] =
buildSettings["TULSI_VERSION"] = tulsiVersion
// Set default Python STDOUT encoding of scripts run by Xcode (such as to UTF-8.
// Otherwise, this would be the Python 2 default of ASCII, causing various encoding errors when
// handling UTF-8 output from Bazel BEP in
buildSettings["PYTHONIOENCODING"] = "utf8"
let searchPaths = ["$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))",
// Ideally this would use USER_HEADER_SEARCH_PATHS but some code generation tools (e.g.,
// protocol buffers) make use of system-style includes.
buildSettings["HEADER_SEARCH_PATHS"] = searchPaths.joined(separator: " ")
createBuildConfigurationsForList(project.buildConfigurationList, buildSettings: buildSettings)
/// Generates build targets for the given rule entries.
func generateBuildTargetsForRuleEntries(_ ruleEntries: Set<RuleEntry>,
ruleEntryMap: RuleEntryMap) throws {
let namedRuleEntries = generateUniqueNamesForRuleEntries(ruleEntries)
let progressNotifier = ProgressNotifier(name: GeneratingBuildTargets,
maxValue: namedRuleEntries.count)
var testTargetLinkages = [(PBXNativeTarget, BuildLabel?, RuleEntry)]()
var watchAppTargets = [String: (PBXNativeTarget, RuleEntry)]()
var watchExtensionsByEntry = [RuleEntry: PBXNativeTarget]()
for (name, entry) in namedRuleEntries {
let target = try createBuildTargetForRuleEntry(entry,
named: name,
ruleEntryMap: ruleEntryMap)
if let script = options[.PreBuildPhaseRunScript, entry.label.value] {
let runScript = PBXShellScriptBuildPhase(shellScript: script, shellPath: "/bin/bash")
runScript.showEnvVarsInLog = true
target.buildPhases.insert(runScript, at: 0)
if let script = options[.PostBuildPhaseRunScript, entry.label.value] {
let runScript = PBXShellScriptBuildPhase(shellScript: script, shellPath: "/bin/bash")
runScript.showEnvVarsInLog = true
if let hostLabelString = entry.attributes[.test_host] as? String {
let hostLabel = BuildLabel(hostLabelString)
testTargetLinkages.append((target, hostLabel, entry))
} else if entry.pbxTargetType == .UnitTest {
// If there is no host and it's a unit test, assume it doesn't need one, i.e. it's a
// library based test.
testTargetLinkages.append((target, nil, entry))
switch entry.pbxTargetType {
case .Watch2App?:
watchAppTargets[name] = (target, entry)
case .Watch2Extension?:
watchExtensionsByEntry[entry] = target
// The watch app target must have an explicit dependency on the watch extension target.
for (_, (watchAppTarget, watchRuleEntry)) in watchAppTargets {
for ext in watchRuleEntry.extensions {
if let extEntry = ruleEntryMap.ruleEntry(buildLabel: ext, depender: watchRuleEntry),
extEntry.pbxTargetType == .Watch2Extension {
if let watchExtensionTarget = watchExtensionsByEntry[extEntry] {
watchAppTarget.createDependencyOn(watchExtensionTarget, proxyType: .targetReference, inProject: project)
} else {
comment: "Message to show when the watchOS app extension %1$@ could not be found and the resulting project will not be able to launch the watch app.",
values: extEntry.label.value)
for (testTarget, testHostLabel, entry) in testTargetLinkages {
let testHostTarget: PBXNativeTarget?
if let hostTargetLabel = testHostLabel {
testHostTarget = projectTargetForLabel(hostTargetLabel) as? PBXNativeTarget
if testHostTarget == nil {
// If the user did not choose to include the host target it won't be available so the
// linkage can be skipped. We will still force the generation of this test host target to
// avoid issues when running tests as bundle targets in Xcode.
comment: "Warning to show when a user has selected an XCTest but not its host application.",
values: entry.label.value, hostTargetLabel.value)
} else {
testHostTarget = nil
withLinkageToHostTarget: testHostTarget,
ruleEntry: entry,
ruleEntryMap: ruleEntryMap)
// MARK: - Private methods
/// Generates a filter function that may be used to verify that a path string is allowed by the
/// given set of pathFilters.
private func pathFilterFunc(_ pathFilters: Set<String>) -> (String) -> Bool {
let recursiveFilters = Set<String>(pathFilters.filter({ $0.hasSuffix("/...") }).map() {
let index = $0.index($0.endIndex, offsetBy: -3)
return String($0[..<index])
func includePath(_ path: String) -> Bool {
let dir = (path as NSString).deletingLastPathComponent
if pathFilters.contains(dir) { return true }
let terminatedDir = dir + "/"
for filter in recursiveFilters {
if terminatedDir.hasPrefix(filter) { return true }
return false
return includePath
/// Attempts to reduce the number of indexers by merging any that have identical settings.
private func mergeRegisteredIndexers() {
func mergeIndexers<T : Sequence>(_ indexers: T) -> [String: IndexerData] where T.Iterator.Element == IndexerData {
var mergedIndexers = [String: IndexerData]()
var indexers = Array(indexers).sorted { $0.indexerName < $1.indexerName }
while !indexers.isEmpty {
var remaining = [IndexerData]()
var d1 = indexers.popLast()!
for d2 in indexers {
if d1.canMergeWith(d2) {
d1 = d1.merging(d2)
} else {
mergedIndexers[d1.indexerName] = d1
indexers = remaining
return mergedIndexers
staticIndexers = mergeIndexers(staticIndexers.values)
frameworkIndexers = mergeIndexers(frameworkIndexers.values)
private func generateFileReferencesForFileInfos(_ infos: [BazelFileInfo]) -> [PBXFileReference] {
guard !infos.isEmpty else { return [] }
var generatedFilePaths = [String]()
var sourceFilePaths = [String]()
for info in infos {
switch info.targetType {
case .generatedFile:
case .sourceFile:
// Add the source paths directly and the generated paths with explicitFileType set.
var (_, fileReferences) = project.getOrCreateGroupsAndFileReferencesForPaths(sourceFilePaths)
let (_, generatedFileReferences) = project.getOrCreateGroupsAndFileReferencesForPaths(generatedFilePaths)
generatedFileReferences.forEach() { $0.isInputFile = false }
fileReferences.append(contentsOf: generatedFileReferences)
return fileReferences
/// Generates file references for the given infos, and returns a settings dictionary to be passed
/// to createBuildPhaseForReferences:withPerFileSettings:.
private func generateFileReferencesAndSettingsForNonARCFileInfos(_ infos: [BazelFileInfo]) -> ([PBXFileReference], [PBXFileReference: [String: String]]) {
let nonARCFileReferences = generateFileReferencesForFileInfos(infos)
var settings = [PBXFileReference: [String: String]]()
let disableARCSetting = ["COMPILER_FLAGS": "-fno-objc-arc"]
nonARCFileReferences.forEach() {
settings[$0] = disableARCSetting
return (nonARCFileReferences, settings)
private func generateUniqueNamesForRuleEntries(_ ruleEntries: Set<RuleEntry>) -> [String: RuleEntry] {
// Build unique names for the target rules.
var collidingRuleEntries = [String: [RuleEntry]]()
for entry: RuleEntry in ruleEntries {
let shortName = entry.label.targetName!
if var existingRules = collidingRuleEntries[shortName] {
collidingRuleEntries[shortName] = existingRules
} else {
collidingRuleEntries[shortName] = [entry]
var namedRuleEntries = [String: RuleEntry]()
for (name, entries) in collidingRuleEntries {
guard entries.count > 1 else {
namedRuleEntries[name] = entries.first!
for entry in entries {
let fullName = entry.label.asFullPBXTargetName!
namedRuleEntries[fullName] = entry
return namedRuleEntries
/// Adds the given file targets to a versioned group.
private func createReferencesForVersionedFileTargets(_ fileInfos: [BazelFileInfo]) -> [XCVersionGroup] {
var groups = [String: XCVersionGroup]()
for info in fileInfos {
let path = info.fullPath as NSString
let versionedGroupPath = path.deletingLastPathComponent
let type = info.subPath.pbPathUTI ?? ""
let versionedGroup = project.getOrCreateVersionGroupForPath(versionedGroupPath,
versionGroupType: type)
if groups[versionedGroupPath] == nil {
groups[versionedGroupPath] = versionedGroup
let ref = versionedGroup.getOrCreateFileReferenceBySourceTree(.Group,
path: path as String)
ref.isInputFile = info.targetType == .sourceFile
for (sourcePath, group) in groups {
setCurrentVersionForXCVersionGroup(group, atPath: sourcePath)
return Array(groups.values)
// Attempt to read the .xccurrentversion plists in the xcdatamodeld's and sync up the
// currentVersion in the XCVersionGroup instances. Failure to specify the currentVersion will
// result in Xcode picking an arbitrary version.
private func setCurrentVersionForXCVersionGroup(_ group: XCVersionGroup,
atPath sourcePath: String) {
let versionedBundleURL = workspaceRootURL.appendingPathComponent(sourcePath,
isDirectory: true)
let currentVersionPlistURL = versionedBundleURL.appendingPathComponent(".xccurrentversion",
isDirectory: false)
let path = currentVersionPlistURL.path
guard let data = FileManager.default.contents(atPath: path) else {
comment: "Message to show when loading a .xccurrentversion file fails.",
values:, "Version file at '\(path)' could not be read")
do {
let plist = try PropertyListSerialization.propertyList(from: data,
options: PropertyListSerialization.MutabilityOptions(),
format: nil) as! [String: AnyObject]
if let currentVersion = plist["_XCCurrentVersionName"] as? String {
if !group.setCurrentVersionByName(currentVersion) {
comment: "Message to show when loading a .xccurrentversion file fails.",
values:, "Version '\(currentVersion)' specified by file at '\(path)' was not found")
} catch let e as NSError {
comment: "Message to show when loading a .xccurrentversion file fails.",
values:, "Version file at '\(path)' is invalid: \(e)")
} catch {
comment: "Message to show when loading a .xccurrentversion file fails.",
values:, "Version file at '\(path)' is invalid.")
// Adds XCBuildConfigurations to the given indexer PBXTarget.
// Note that preprocessorDefines is expected to be a pre-quoted set of defines (e.g., if "key" has
// spaces it would be the string: key="value with spaces").
private func addConfigsForIndexingTarget(_ target: PBXTarget, data: IndexerData) {
var buildSettings = options.buildSettingsForTarget(
buildSettings["PRODUCT_NAME"] = target.productName!
if let pchFile = data.pchFile {
buildSettings["GCC_PREFIX_HEADER"] = PBXTargetGenerator.projectRefForBazelFileInfo(pchFile)
var allOtherCFlags = data.otherCFlags.filter { !$0.hasPrefix("-W") }
if !data.preprocessorDefines.isEmpty {
allOtherCFlags.append(contentsOf: data.preprocessorDefines.sorted().map({"-D\($0)"}))
if !allOtherCFlags.isEmpty {
buildSettings["OTHER_CFLAGS"] = allOtherCFlags.joined(separator: " ")
if let bridgingHeader = data.bridgingHeader {
buildSettings["SWIFT_OBJC_BRIDGING_HEADER"] = PBXTargetGenerator.projectRefForBazelFileInfo(bridgingHeader)
if data.enableModules {
buildSettings["CLANG_ENABLE_MODULES"] = "YES"
if !data.includes.isEmpty {
let includes = data.includes.joined(separator: " ")
buildSettings["HEADER_SEARCH_PATHS"] = "$(inherited) \(includes) "
if !data.frameworkSearchPaths.isEmpty {
buildSettings["FRAMEWORK_SEARCH_PATHS"] = "$(inherited) " + data.frameworkSearchPaths.joined(separator: " ")
if !data.swiftIncludePaths.isEmpty {
let paths = data.swiftIncludePaths.joined(separator: " ")
buildSettings["SWIFT_INCLUDE_PATHS"] = "$(inherited) \(paths)"
if !data.otherSwiftFlags.isEmpty {
buildSettings["OTHER_SWIFT_FLAGS"] = "$(inherited) " + data.otherSwiftFlags.joined(separator: " ")
// Set USER_HEADER_SEARCH_PATHS for non-Swift (meaning static library) indexer targets if the
// improved include/import setting is enabled.
if self.improvedImportAutocompletionFix, let nativeTarget = target as? PBXNativeTarget,
nativeTarget.productType == .StaticLibrary {
buildSettings["USER_HEADER_SEARCH_PATHS"] = "$(\(PBXTargetGenerator.WorkspaceRootVarName))"
// Default the SDKROOT to the proper device SDK.
// Previously, we would force the indexer targets to the x86_64 simulator. This caused indexing
// to fail when building Swift for device, as the arm Swift modules would be discovered via
// tulsi-includes but Xcode would only index for x86_64. Note that just setting this is not
// enough; research has shown that Xcode needs a scheme for these indexer targets in order to
// use the proper ARCH for indexing, so we also generate an `_idx_Scheme` containing all
// indexer targets as build targets.
let deploymentTarget = data.deploymentTarget
let platform = deploymentTarget.platform
buildSettings["SDKROOT"] = platform.deviceSDK
buildSettings[platform.buildSettingsDeploymentTarget] = deploymentTarget.osVersion
buildSettings: buildSettings,
indexerSettingsOnly: true)
/// Updates the build settings and optionally adds a "Compile sources" phase for the given test
/// bundle target.
private func updateTestTarget(_ target: PBXNativeTarget,
withLinkageToHostTarget hostTarget: PBXNativeTarget?,
ruleEntry: RuleEntry,
ruleEntryMap: RuleEntryMap) {
// If the test target has a test host, check that it was included in the Tulsi configuration.
if let hostTarget = hostTarget {
project.linkTestTarget(target, toHostTarget: hostTarget)
updateTestTargetIndexer(target, ruleEntry: ruleEntry, hostTarget: hostTarget, ruleEntryMap: ruleEntryMap)
updateTestTargetBuildPhases(target, ruleEntry: ruleEntry, ruleEntryMap: ruleEntryMap)
/// Updates the test target indexer with test specific values.
private func updateTestTargetIndexer(_ target: PBXNativeTarget,
ruleEntry: RuleEntry,
hostTarget: PBXNativeTarget?,
ruleEntryMap: RuleEntryMap) {
let testSettings = targetTestSettings(target, hostTarget: hostTarget, ruleEntry: ruleEntry, ruleEntryMap: ruleEntryMap)
// Inherit the resolved values from the indexer.
let deploymentTarget = ruleEntry.deploymentTarget ?? PBXTargetGenerator.defaultDeploymentTarget()
let deploymentTargetLabel = IndexerData.deploymentTargetLabel(deploymentTarget)
let indexerName = PBXTargetGenerator.indexerNameForTargetName(ruleEntry.label.targetName!,
hash: ruleEntry.label.hashValue,
suffix: deploymentTargetLabel)
let indexerTarget = indexerTargetByName[indexerName]
withBuildSettings: testSettings,
inheritingFromConfigurationList: indexerTarget?.buildConfigurationList,
suppressingBuildSettings: ["ARCHS", "VALID_ARCHS"])
private func updateTestTargetBuildPhases(_ target: PBXNativeTarget,
ruleEntry: RuleEntry,
ruleEntryMap: RuleEntryMap) {
let testSourceFileInfos = ruleEntry.sourceFiles
let testNonArcSourceFileInfos = ruleEntry.nonARCSourceFiles
let containsSwift = ruleEntry.attributes[.has_swift_dependency] as? Bool ?? false
// For the Swift dummy files phase to work, it has to be placed before the Compile Sources build
// phase.
if containsSwift {
let testBuildPhase = createGenerateSwiftDummyFilesTestBuildPhase()
if !testSourceFileInfos.isEmpty || !testNonArcSourceFileInfos.isEmpty {
// Create dummy dependency files for non-Swift code as Xcode expects Clang to generate them.
let allSources = testSourceFileInfos + testNonArcSourceFileInfos
let nonSwiftSources = allSources.filter { !$0.subPath.hasSuffix(".swift") }
if !nonSwiftSources.isEmpty {
let testBuildPhase = createGenerateDummyDependencyFilesTestBuildPhase(nonSwiftSources)
var fileReferences = generateFileReferencesForFileInfos(testSourceFileInfos)
let (nonARCFiles, nonARCSettings) =
fileReferences.append(contentsOf: nonARCFiles)
let buildPhase = createBuildPhaseForReferences(fileReferences,
withPerFileSettings: nonARCSettings)
/// Adds includes paths from the RuleEntry to the given NSSet.
private func addIncludes(_ ruleEntry: RuleEntry,
toSet includes: NSMutableOrderedSet) {
if let includePaths = ruleEntry.includePaths {
let rootedPaths: [String] = { (path, recursive) in
let rootedPath = "$(\(PBXTargetGenerator.WorkspaceRootVarName))/\(path)"
if recursive {
return "\(rootedPath)/**"
return rootedPath
includes.addObjects(from: rootedPaths)
/// Some targets that generate sources also provide header search paths into non-generated
/// sources. Using workspace root is needed for the former, but the latter has to be
/// included via the Bazel workspace root.
/// TODO(tulsi-team): See if we can merge the two locations to just Bazel workspace.
let bazelWorkspaceRootedPaths: [String] = { (path, recursive) in
let rootedPath = "$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))/\(path)"
if recursive {
return "\(rootedPath)/**"
return rootedPath
includes.addObjects(from: bazelWorkspaceRootedPaths)
// TODO(rdar://36107040): Once Xcode supports indexing with multiple -fmodule-map-file
// arguments, remove this in favor of "-Xcc -fmodule-map-file=<>" below.
// Include the ObjC modules in HEADER_SEARCH_PATHS in order to fix issues regarding
// explicitly passing them via -fmodule-map-file: Xcode 8 seems to ignore the
// -fmodule-map-file flag when using SourceKit for CMD+click and Xcode 9 seems to only
// pass in the last -fmodule-map-file flag given.
for moduleMap in ruleEntry.objCModuleMaps {
let fullPath = (moduleMap.fullPath as NSString).deletingLastPathComponent
/// Adds swift include paths from the RuleEntry to the given NSSet.
private func addSwiftIncludes(_ ruleEntry: RuleEntry,
toSet swiftIncludes: NSMutableOrderedSet) {
for module in ruleEntry.swiftTransitiveModules {
let fullPath = module.fullPath as NSString
let includePath = fullPath.deletingLastPathComponent
/// Returns other swift compiler flags for the given target based on the RuleEntry.
private func addOtherSwiftFlags(_ ruleEntry: RuleEntry, toArray swiftFlags: NSMutableArray) {
// Load module maps explicitly instead of letting Clang discover them on search paths. This
// is needed to avoid a case where Clang may load the same header both in modular and
// non-modular contexts, leading to duplicate definitions in the same file.
// See
swiftFlags.addObjects(from: {
"-Xcc -fmodule-map-file=$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))/\($0.fullPath)"
if let swiftDefines = ruleEntry.swiftDefines {
for flag in swiftDefines {
/// Reads the RuleEntry's copts and puts the arguments into the correct set.
private func addLocalSettings(_ ruleEntry: RuleEntry,
localDefines: inout Set<String>,
localIncludes: NSMutableOrderedSet,
otherCFlags: NSMutableArray,
swiftIncludePaths: NSMutableOrderedSet,
otherSwiftFlags: NSMutableArray) {
if let swiftc_opts = ruleEntry.attributes[.swiftc_opts] as? [String], !swiftc_opts.isEmpty {
for opt in swiftc_opts {
if opt.hasPrefix("-I") {
let index = opt.index(opt.startIndex, offsetBy: 2)
var path = String(opt[index...])
if !path.hasPrefix("/") {
path = "$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))/\(path)"
} else {
guard let copts = ruleEntry.attributes[.copts] as? [String], !copts.isEmpty else {
for opt in copts {
if opt.hasPrefix("-D") {
let index = opt.index(opt.startIndex, offsetBy: 2)
} else if opt.hasPrefix("-I") {
let index = opt.index(opt.startIndex, offsetBy: 2)
var path = String(opt[index...])
if !path.hasPrefix("/") {
path = "$(\(PBXTargetGenerator.BazelWorkspaceSymlinkVarName))/\(path)"
} else {
/// Returns test specific settings for test targets.
private func targetTestSettings(_ target: PBXNativeTarget,
hostTarget: PBXNativeTarget?,
ruleEntry: RuleEntry,
ruleEntryMap: RuleEntryMap) -> [String: String] {
var testSettings = ["TULSI_TEST_RUNNER_ONLY": "YES"]
// Attempt to update the build configs for the target to include BUNDLE_LOADER and TEST_HOST
// values, linking the test target to its host.
if let hostTargetPath = hostTarget?.productReference?.path,
let hostTargetProductName = hostTarget?.productName,
let deploymentTarget = target.deploymentTarget {
if target.productType == .UIUnitTest {
testSettings["TEST_TARGET_NAME"] = hostTargetProductName
} else if let testHostPath = deploymentTarget.platform.testHostPath(hostTargetPath: hostTargetPath,
hostTargetProductName: hostTargetProductName) {
testSettings["BUNDLE_LOADER"] = "$(TEST_HOST)"
testSettings["TEST_HOST"] = testHostPath
let includes = NSMutableOrderedSet()
// We don't use the defines at the moment but the function will add them anyway. We could try
// to use the defines but we'd have to do so on a per-file basis as this Test target can contain
// files from multiple targets.
var defines = Set<String>()
let swiftIncludePaths = NSMutableOrderedSet()
let otherSwiftFlags = NSMutableArray()
addIncludes(ruleEntry, toSet: includes)
addLocalSettings(ruleEntry, localDefines: &defines, localIncludes: includes,
otherCFlags: NSMutableArray(), swiftIncludePaths: NSMutableOrderedSet(),
otherSwiftFlags: NSMutableArray())
addSwiftIncludes(ruleEntry, toSet: swiftIncludePaths)
addOtherSwiftFlags(ruleEntry, toArray: otherSwiftFlags)
let includesArr = includes.array as! [String]
if !includesArr.isEmpty {
testSettings["HEADER_SEARCH_PATHS"] = "$(inherited) " + includesArr.joined(separator: " ")
if let swiftIncludes = swiftIncludePaths.array as? [String], !swiftIncludes.isEmpty {
testSettings["SWIFT_INCLUDE_PATHS"] = "$(inherited) " + swiftIncludes.joined(separator: " ")
if let otherSwiftFlagsArr = otherSwiftFlags as? [String], !otherSwiftFlagsArr.isEmpty {
testSettings["OTHER_SWIFT_FLAGS"] = "$(inherited) " + otherSwiftFlagsArr.joined(separator: " ")
if let moduleName = ruleEntry.moduleName {
testSettings["PRODUCT_MODULE_NAME"] = moduleName
return testSettings
// Resolves a BuildLabel to an existing PBXTarget, handling target name collisions.
private func projectTargetForLabel(_ label: BuildLabel) -> PBXTarget? {
guard let targetName = label.targetName else { return nil }
if let target = project.targetByName[targetName] {
return target
guard let fullTargetName = label.asFullPBXTargetName else { return nil }
return project.targetByName[fullTargetName]
// Adds a dummy build configuration to the given list based off of the Debug config that is
// used to effectively disable compilation when running XCTests by converting each compile call
// into a "clang -help" invocation.
private func addTestRunnerBuildConfigurationToBuildConfigurationList(_ list: XCConfigurationList) {
func createTestConfigNamed(_ testConfigName: String,
forBaseConfigNamed configurationName: String) {
let baseConfig = list.getOrCreateBuildConfiguration(configurationName)
let config = list.getOrCreateBuildConfiguration(testConfigName)
var runTestTargetBuildSettings = baseConfig.buildSettings
// Prevent compilation invocations from actually compiling ObjC, C and Swift files.
runTestTargetBuildSettings["OTHER_CFLAGS"] = "-help"
runTestTargetBuildSettings["OTHER_SWIFT_FLAGS"] = "-help"
// Prevents linker invocations from attempting to use the .o files which were never generated
// due to compilation being turned into nop's.
runTestTargetBuildSettings["OTHER_LDFLAGS"] = "-help"
// Force the output of the -emit-objc-header flag to a known value. This should be kept in
// sync with the RunScript build phase created in createGenerateSwiftDummyFilesTestBuildPhase.
// Disable the generation of ObjC header files from Swift for test targets.
runTestTargetBuildSettings["SWIFT_INSTALL_OBJC_HEADER"] = "NO"
// Prevent Xcode from attempting to create a fat binary with lipo from artifacts that were
// never generated by the linker nop's.
runTestTargetBuildSettings["ONLY_ACTIVE_ARCH"] = "YES"
// Wipe out settings that are not useful for test runners
// These do nothing and can cause issues due to exceeding environment limits:
runTestTargetBuildSettings["FRAMEWORK_SEARCH_PATHS"] = ""
runTestTargetBuildSettings["HEADER_SEARCH_PATHS"] = ""
config.buildSettings = runTestTargetBuildSettings
for (testConfigName, configName) in PBXTargetGenerator.testRunnerEnabledBuildConfigNames {
createTestConfigNamed(testConfigName, forBaseConfigNamed: configName)
private func createBuildConfigurationsForList(_ buildConfigurationList: XCConfigurationList,
buildSettings: Dictionary<String, String>,
indexerSettingsOnly: Bool = false) {
func addPreprocessorDefine(_ define: String, toConfig config: XCBuildConfiguration) {
if let existingDefinitions = config.buildSettings["GCC_PREPROCESSOR_DEFINITIONS"] {
// NOTE(abaire): Technically this should probably check first to see if "define" has been
// set but in the foreseeable usage it's unlikely that this if condition would
// ever trigger at all.
config.buildSettings["GCC_PREPROCESSOR_DEFINITIONS"] = existingDefinitions + " \(define)"
} else {
config.buildSettings["GCC_PREPROCESSOR_DEFINITIONS"] = define
for configName in PBXTargetGenerator.buildConfigNames {
let config = buildConfigurationList.getOrCreateBuildConfiguration(configName)
config.buildSettings = buildSettings
// Insert any defines that are injected by Bazel's ObjcConfiguration.
if configName == "Debug" {
addPreprocessorDefine("DEBUG=1", toConfig: config)
} else if configName == "Release" {
addPreprocessorDefine("NDEBUG=1", toConfig: config)
private func updateMissingBuildConfigurationsForList(_ buildConfigurationList: XCConfigurationList,
withBuildSettings newSettings: Dictionary<String, String>,
inheritingFromConfigurationList baseConfigurationList: XCConfigurationList? = nil,
suppressingBuildSettings suppressedKeys: Set<String> = []) {
func mergeDictionary(_ old: inout [String: String],
withContentsOfDictionary new: [String: String]) {
for (key, value) in new {
if let _ = old[key] { continue }
if suppressedKeys.contains(key) { continue }
old.updateValue(value, forKey: key)
for configName in PBXTargetGenerator.buildConfigNames {
let config = buildConfigurationList.getOrCreateBuildConfiguration(configName)
mergeDictionary(&config.buildSettings, withContentsOfDictionary: newSettings)
if let baseSettings = baseConfigurationList?.getBuildConfiguration(configName)?.buildSettings {
mergeDictionary(&config.buildSettings, withContentsOfDictionary: baseSettings)
for (testRunnerConfigName, configName) in PBXTargetGenerator.testRunnerEnabledBuildConfigNames {
let config = buildConfigurationList.getOrCreateBuildConfiguration(testRunnerConfigName)
mergeDictionary(&config.buildSettings, withContentsOfDictionary: newSettings)
if let baseSettings = baseConfigurationList?.getBuildConfiguration(testRunnerConfigName)?.buildSettings {
mergeDictionary(&config.buildSettings, withContentsOfDictionary: baseSettings)
} else if let baseSettings = baseConfigurationList?.getBuildConfiguration(configName)?.buildSettings {
// Fall back to the base config name if the base configuration list doesn't support a given
// test runner.
mergeDictionary(&config.buildSettings, withContentsOfDictionary: baseSettings)
static func indexerNameForTargetName(_ targetName: String, hash: Int, suffix: String?) -> String {
let normalizedTargetName: String
if targetName.count > MaxIndexerNameLength {
let endIndex = targetName.index(targetName.startIndex, offsetBy: MaxIndexerNameLength - 4)
normalizedTargetName = String(targetName[..<endIndex]) + "_etc"
} else {
normalizedTargetName = targetName
if let suffix = suffix {
return String(format: "\(IndexerTargetPrefix)\(normalizedTargetName)_%08X_%@", hash, suffix)
return String(format: "\(IndexerTargetPrefix)\(normalizedTargetName)_%08X", hash)
// Creates a PBXSourcesBuildPhase with the given references, optionally applying the given
// per-file settings to each.
private func createBuildPhaseForReferences(_ refs: [PBXReference],
withPerFileSettings settings: [PBXFileReference: [String: String]]? = nil) -> PBXSourcesBuildPhase {
let buildPhase = PBXSourcesBuildPhase()
for ref in refs {
if let ref = ref as? PBXFileReference {
// Do not add header files to the build phase.
guard let fileUTI = ref.uti, fileUTI.hasPrefix("sourcecode.") && !fileUTI.hasSuffix(".h") else {
buildPhase.files.append(PBXBuildFile(fileRef: ref, settings: settings?[ref]))
} else {
buildPhase.files.append(PBXBuildFile(fileRef: ref))
return buildPhase
/// Creates a PBXNativeTarget for the given rule entry, returning it.
private func createBuildTargetForRuleEntry(_ entry: RuleEntry,
named name: String,
ruleEntryMap: RuleEntryMap)
throws -> (PBXNativeTarget) {
guard let pbxTargetType = entry.pbxTargetType else {
throw ProjectSerializationError.unsupportedTargetType(entry.type, entry.label.value)
let target = project.createNativeTarget(name,
deploymentTarget: entry.deploymentTarget,
targetType: pbxTargetType)
for f in entry.secondaryArtifacts {
var buildSettings = options.buildSettingsForTarget(name)
buildSettings["TULSI_BUILD_PATH"] = entry.label.packageName!
buildSettings["PRODUCT_NAME"] = entry.bundleName ?? name
if let bundleID = entry.bundleID {
buildSettings["PRODUCT_BUNDLE_IDENTIFIER"] = bundleID
if let sdkRoot = entry.XcodeSDKRoot {
buildSettings["SDKROOT"] = sdkRoot
// An invalid launch image is set in order to suppress Xcode's warning about missing default
// launch images.
buildSettings["INFOPLIST_FILE"] = stubInfoPlistPaths.stubPlist(entry)
if let deploymentTarget = entry.deploymentTarget {
buildSettings[deploymentTarget.platform.buildSettingsDeploymentTarget] = deploymentTarget.osVersion
// watchOS1 apps require TARGETED_DEVICE_FAMILY to be overridden as they are a specialization of
// an iOS target rather than a true standalone (like watchOS2 and later).
if pbxTargetType == .Watch1App {
buildSettings["TARGETED_DEVICE_FAMILY"] = "4"
buildSettings["TARGETED_DEVICE_FAMILY[sdk=iphonesimulator*]"] = "1,4"
// uses this to determine if it needs to pass the --xcode_version flag, as the
// flag can have implications for caching even if the user's active Xcode version is the same
// as the flag.
if let xcodeVersion = entry.xcodeVersion {
buildSettings["TULSI_XCODE_VERSION"] = xcodeVersion
// Disable Xcode's attempts at generating dSYM bundles as it conflicts with the operation of the
// special test runner build configurations (which have associated sources but don't actually
// compile anything).
buildSettings["DEBUG_INFORMATION_FORMAT"] = "dwarf"
// The following settings are simply passed through the environment for use by build scripts.
buildSettings["BAZEL_TARGET"] = entry.label.value
createBuildConfigurationsForList(target.buildConfigurationList, buildSettings: buildSettings)
if let buildPhase = createBuildPhaseForRuleEntry(entry) {
if let legacyTarget = bazelCleanScriptTarget {
proxyType: PBXContainerItemProxy.ProxyType.targetReference,
inProject: project,
first: true)
return target
private func createGenerateSwiftDummyFilesTestBuildPhase() -> PBXShellScriptBuildPhase {
let shellScript =
"# Script to generate specific Swift files Xcode expects when running tests.\n" +
"set -eu\n" +
"SUFFIXES=(swiftdoc swiftmodule)\n" +
"for ARCH in \"${ARCH_ARRAY[@]}\"\n" +
"do\n" +
" mkdir -p \"$OBJECT_FILE_DIR_normal/$ARCH/\"\n" +
" for SUFFIX in \"${SUFFIXES[@]}\"\n" +
" do\n" +
" done\n" +
let buildPhase = PBXShellScriptBuildPhase(shellScript: shellScript, shellPath: "/bin/bash")
buildPhase.showEnvVarsInLog = true
buildPhase.mnemonic = "SwiftDummy"
return buildPhase
private func createGenerateDummyDependencyFilesTestBuildPhase(_ sources: [BazelFileInfo]) -> PBXShellScriptBuildPhase {
let files = { ($0.subPath as NSString).deletingPathExtension.pbPathLastComponent }
let shellScript = """
# Script to generate dependency files Xcode expects when running tests.
set -eu
FILES=(\( { $0.escapingForShell }.joined(separator: " ")))
for ARCH in "${ARCH_ARRAY[@]}"
mkdir -p "$OBJECT_FILE_DIR_normal/$ARCH/"
rm -f "$OBJECT_FILE_DIR_normal/$ARCH/${PRODUCT_NAME}_dependency_info.dat"
printf '\\x00\\x31\\x00' >"$OBJECT_FILE_DIR_normal/$ARCH/${PRODUCT_NAME}_dependency_info.dat"
for FILE in "${FILES[@]}"
touch "$OBJECT_FILE_DIR_normal/$ARCH/$FILE.d"
let buildPhase = PBXShellScriptBuildPhase(shellScript: shellScript, shellPath: "/bin/bash")
buildPhase.showEnvVarsInLog = true
buildPhase.mnemonic = "ObjcDummy"
return buildPhase
private func createBuildPhaseForRuleEntry(_ entry: RuleEntry)
-> PBXShellScriptBuildPhase? {
let buildLabel = entry.label.value
let commandLine = buildScriptCommandlineForBuildLabels(buildLabel)
let workingDirectory = PBXTargetGenerator.workingDirectoryForPBXGroup(project.mainGroup)
let changeDirectoryAction: String
if workingDirectory.isEmpty {
changeDirectoryAction = ""
} else {
changeDirectoryAction = "cd \"\(workingDirectory)\""
let shellScript = "set -e\n" +
"\(changeDirectoryAction)\n" +
"exec \(commandLine)"
// Using the Info.plist as an input forces Xcode to run this after processing the Info.plist,
// allowing our script to safely overwrite the Info.plist after Xcode does its processing.
let inputPaths = ["$(TARGET_BUILD_DIR)/$(INFOPLIST_PATH)"]
let buildPhase = PBXShellScriptBuildPhase(
shellScript: shellScript,
shellPath: "/bin/bash",
inputPaths: inputPaths
buildPhase.showEnvVarsInLog = true
buildPhase.mnemonic = "BazelBuild"
return buildPhase
/// Constructs a commandline string that will invoke the bazel build script to generate the given
/// buildLabels (a space-separated set of Bazel target labels).
private func buildScriptCommandlineForBuildLabels(_ buildLabels: String) -> String {
return "\"\(buildScriptPath)\" " +
"\(buildLabels) " +
"--bazel \"\(bazelPath)\" " +
"--bazel_bin_path \"\(bazelBinPath)\" " +
"--verbose "