tools/gn/setup.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "tools/gn/setup.h"
   6
   7 #include <stdlib.h>
   8
   9 #include <algorithm>
  10 #include <sstream>
  11
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/process/launch.h"
  17 #include "base/strings/string_split.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "build/build_config.h"
  21 #include "tools/gn/commands.h"
  22 #include "tools/gn/filesystem_utils.h"
  23 #include "tools/gn/input_file.h"
  24 #include "tools/gn/parse_tree.h"
  25 #include "tools/gn/parser.h"
  26 #include "tools/gn/source_dir.h"
  27 #include "tools/gn/source_file.h"
  28 #include "tools/gn/standard_out.h"
  29 #include "tools/gn/switches.h"
  30 #include "tools/gn/tokenizer.h"
  31 #include "tools/gn/trace.h"
  32 #include "tools/gn/value.h"
  33
  34 #if defined(OS_WIN)
  35 #include <windows.h>
  36 #endif
  37
  38 extern const char kDotfile_Help[] =
  39     ".gn file\n"
  40     "\n"
  41     "  When gn starts, it will search the current directory and parent\n"
  42     "  directories for a file called \".gn\". This indicates the source root.\n"
  43     "  You can override this detection by using the --root command-line\n"
  44     "  argument\n"
  45     "\n"
  46     "  The .gn file in the source root will be executed. The syntax is the\n"
  47     "  same as a buildfile, but with very limited build setup-specific\n"
  48     "  meaning.\n"
  49     "\n"
  50     "  If you specify --root, by default GN will look for the file .gn in\n"
  51     "  that directory. If you want to specify a different file, you can\n"
  52     "  additionally pass --dotfile:\n"
  53     "\n"
  54     "    gn gen out/Debug --root=/home/build --dotfile=/home/my_gn_file.gn\n"
  55     "\n"
  56     "Variables\n"
  57     "\n"
  58     "  buildconfig [required]\n"
  59     "      Label of the build config file. This file will be used to set up\n"
  60     "      the build file execution environment for each toolchain.\n"
  61     "\n"
  62     "  check_targets [optional]\n"
  63     "      A list of labels and label patterns that should be checked when\n"
  64     "      running \"gn check\" or \"gn gen --check\". If unspecified, all\n"
  65     "      targets will be checked. If it is the empty list, no targets will\n"
  66     "      be checked.\n"
  67     "\n"
  68     "      The format of this list is identical to that of \"visibility\"\n"
  69     "      so see \"gn help visibility\" for examples.\n"
  70     "\n"
  71     "  exec_script_whitelist [optional]\n"
  72     "      A list of .gn/.gni files (not labels) that have permission to call\n"
  73     "      the exec_script function. If this list is defined, calls to\n"
  74     "      exec_script will be checked against this list and GN will fail if\n"
  75     "      the current file isn't in the list.\n"
  76     "\n"
  77     "      This is to allow the use of exec_script to be restricted since\n"
  78     "      is easy to use inappropriately. Wildcards are not supported.\n"
  79     "      Files in the secondary_source tree (if defined) should be\n"
  80     "      referenced by ignoring the secondary tree and naming them as if\n"
  81     "      they are in the main tree.\n"
  82     "\n"
  83     "      If unspecified, the ability to call exec_script is unrestricted.\n"
  84     "\n"
  85     "      Example:\n"
  86     "        exec_script_whitelist = [\n"
  87     "          \"//base/BUILD.gn\",\n"
  88     "          \"//build/my_config.gni\",\n"
  89     "        ]\n"
  90     "\n"
  91     "  root [optional]\n"
  92     "      Label of the root build target. The GN build will start by loading\n"
  93     "      the build file containing this target name. This defaults to\n"
  94     "      \"//:\" which will cause the file //BUILD.gn to be loaded.\n"
  95     "\n"
  96     "  secondary_source [optional]\n"
  97     "      Label of an alternate directory tree to find input files. When\n"
  98     "      searching for a BUILD.gn file (or the build config file discussed\n"
  99     "      above), the file will first be looked for in the source root.\n"
 100     "      If it's not found, the secondary source root will be checked\n"
 101     "      (which would contain a parallel directory hierarchy).\n"
 102     "\n"
 103     "      This behavior is intended to be used when BUILD.gn files can't be\n"
 104     "      checked in to certain source directories for whatever reason.\n"
 105     "\n"
 106     "      The secondary source root must be inside the main source tree.\n"
 107     "\n"
 108     "Example .gn file contents\n"
 109     "\n"
 110     "  buildconfig = \"//build/config/BUILDCONFIG.gn\"\n"
 111     "\n"
 112     "  check_targets = [\n"
 113     "    \"//doom_melon/*\",  # Check everything in this subtree.\n"
 114     "    \"//tools:mind_controlling_ant\",  # Check this specific target.\n"
 115     "  ]\n"
 116     "\n"
 117     "  root = \"//:root\"\n"
 118     "\n"
 119     "  secondary_source = \"//build/config/temporary_buildfiles/\"\n";
 120
 121 namespace {
 122
 123 const base::FilePath::CharType kGnFile[] = FILE_PATH_LITERAL(".gn");
 124
 125 base::FilePath FindDotFile(const base::FilePath& current_dir) {
 126   base::FilePath try_this_file = current_dir.Append(kGnFile);
 127   if (base::PathExists(try_this_file))
 128     return try_this_file;
 129
 130   base::FilePath with_no_slash = current_dir.StripTrailingSeparators();
 131   base::FilePath up_one_dir = with_no_slash.DirName();
 132   if (up_one_dir == current_dir)
 133     return base::FilePath();  // Got to the top.
 134
 135   return FindDotFile(up_one_dir);
 136 }
 137
 138 // Called on any thread. Post the item to the builder on the main thread.
 139 void ItemDefinedCallback(base::MessageLoop* main_loop,
 140                          scoped_refptr<Builder> builder,
 141                          scoped_ptr<Item> item) {
 142   DCHECK(item);
 143   main_loop->PostTask(FROM_HERE, base::Bind(&Builder::ItemDefined, builder,
 144                                             base::Passed(&item)));
 145 }
 146
 147 void DecrementWorkCount() {
 148   g_scheduler->DecrementWorkCount();
 149 }
 150
 151 }  // namespace
 152
 153 const char Setup::kBuildArgFileName[] = "args.gn";
 154
 155 Setup::Setup()
 156     : build_settings_(),
 157       loader_(new LoaderImpl(&build_settings_)),
 158       builder_(new Builder(loader_.get())),
 159       root_build_file_("//BUILD.gn"),
 160       check_public_headers_(false),
 161       dotfile_settings_(&build_settings_, std::string()),
 162       dotfile_scope_(&dotfile_settings_),
 163       fill_arguments_(true) {
 164   dotfile_settings_.set_toolchain_label(Label());
 165   build_settings_.set_item_defined_callback(
 166       base::Bind(&ItemDefinedCallback, scheduler_.main_loop(), builder_));
 167
 168   loader_->set_complete_callback(base::Bind(&DecrementWorkCount));
 169   // The scheduler's main loop wasn't created when the Loader was created, so
 170   // we need to set it now.
 171   loader_->set_main_loop(scheduler_.main_loop());
 172 }
 173
 174 Setup::~Setup() {
 175 }
 176
 177 bool Setup::DoSetup(const std::string& build_dir, bool force_create) {
 178   base::CommandLine* cmdline = base::CommandLine::ForCurrentProcess();
 179
 180   scheduler_.set_verbose_logging(cmdline->HasSwitch(switches::kVerbose));
 181   if (cmdline->HasSwitch(switches::kTime) ||
 182       cmdline->HasSwitch(switches::kTracelog))
 183     EnableTracing();
 184
 185   ScopedTrace setup_trace(TraceItem::TRACE_SETUP, "DoSetup");
 186
 187   if (!FillSourceDir(*cmdline))
 188     return false;
 189   if (!RunConfigFile())
 190     return false;
 191   if (!FillOtherConfig(*cmdline))
 192     return false;
 193
 194   // Must be after FillSourceDir to resolve.
 195   if (!FillBuildDir(build_dir, !force_create))
 196     return false;
 197
 198   // Check for unused variables in the .gn file.
 199   Err err;
 200   if (!dotfile_scope_.CheckForUnusedVars(&err)) {
 201     err.PrintToStdout();
 202     return false;
 203   }
 204
 205   if (fill_arguments_) {
 206     if (!FillArguments(*cmdline))
 207       return false;
 208   }
 209   FillPythonPath();
 210
 211   return true;
 212 }
 213
 214 bool Setup::Run() {
 215   RunPreMessageLoop();
 216   if (!scheduler_.Run())
 217     return false;
 218   return RunPostMessageLoop();
 219 }
 220
 221 SourceFile Setup::GetBuildArgFile() const {
 222   return SourceFile(build_settings_.build_dir().value() + kBuildArgFileName);
 223 }
 224
 225 void Setup::RunPreMessageLoop() {
 226   // Load the root build file.
 227   loader_->Load(root_build_file_, LocationRange(), Label());
 228
 229   // Will be decremented with the loader is drained.
 230   g_scheduler->IncrementWorkCount();
 231 }
 232
 233 bool Setup::RunPostMessageLoop() {
 234   Err err;
 235   if (build_settings_.check_for_bad_items()) {
 236     if (!builder_->CheckForBadItems(&err)) {
 237       err.PrintToStdout();
 238       return false;
 239     }
 240
 241     if (!build_settings_.build_args().VerifyAllOverridesUsed(&err)) {
 242       // TODO(brettw) implement a system of warnings. Until we have a better
 243       // system, print the error but don't return failure.
 244       err.PrintToStdout();
 245       return true;
 246     }
 247   }
 248
 249   if (check_public_headers_) {
 250     std::vector<const Target*> all_targets = builder_->GetAllResolvedTargets();
 251     std::vector<const Target*> to_check;
 252     if (check_patterns()) {
 253       commands::FilterTargetsByPatterns(all_targets, *check_patterns(),
 254                                         &to_check);
 255     } else {
 256       to_check = all_targets;
 257     }
 258
 259     if (!commands::CheckPublicHeaders(&build_settings_, all_targets,
 260                                       to_check, false)) {
 261       return false;
 262     }
 263   }
 264
 265   // Write out tracing and timing if requested.
 266   const base::CommandLine* cmdline = base::CommandLine::ForCurrentProcess();
 267   if (cmdline->HasSwitch(switches::kTime))
 268     PrintLongHelp(SummarizeTraces());
 269   if (cmdline->HasSwitch(switches::kTracelog))
 270     SaveTraces(cmdline->GetSwitchValuePath(switches::kTracelog));
 271
 272   return true;
 273 }
 274
 275 bool Setup::FillArguments(const base::CommandLine& cmdline) {
 276   // Use the args on the command line if specified, and save them. Do this even
 277   // if the list is empty (this means clear any defaults).
 278   if (cmdline.HasSwitch(switches::kArgs)) {
 279     if (!FillArgsFromCommandLine(cmdline.GetSwitchValueASCII(switches::kArgs)))
 280       return false;
 281     SaveArgsToFile();
 282     return true;
 283   }
 284
 285   // No command line args given, use the arguments from the build dir (if any).
 286   return FillArgsFromFile();
 287 }
 288
 289 bool Setup::FillArgsFromCommandLine(const std::string& args) {
 290   args_input_file_.reset(new InputFile(SourceFile()));
 291   args_input_file_->SetContents(args);
 292   args_input_file_->set_friendly_name("the command-line \"--args\"");
 293   return FillArgsFromArgsInputFile();
 294 }
 295
 296 bool Setup::FillArgsFromFile() {
 297   ScopedTrace setup_trace(TraceItem::TRACE_SETUP, "Load args file");
 298
 299   SourceFile build_arg_source_file = GetBuildArgFile();
 300   base::FilePath build_arg_file =
 301       build_settings_.GetFullPath(build_arg_source_file);
 302
 303   std::string contents;
 304   if (!base::ReadFileToString(build_arg_file, &contents))
 305     return true;  // File doesn't exist, continue with default args.
 306
 307   // Add a dependency on the build arguments file. If this changes, we want
 308   // to re-generate the build.
 309   g_scheduler->AddGenDependency(build_arg_file);
 310
 311   if (contents.empty())
 312     return true;  // Empty file, do nothing.
 313
 314   args_input_file_.reset(new InputFile(build_arg_source_file));
 315   args_input_file_->SetContents(contents);
 316   args_input_file_->set_friendly_name(
 317       "build arg file (use \"gn args <out_dir>\" to edit)");
 318
 319   setup_trace.Done();  // Only want to count the load as part of the trace.
 320   return FillArgsFromArgsInputFile();
 321 }
 322
 323 bool Setup::FillArgsFromArgsInputFile() {
 324   ScopedTrace setup_trace(TraceItem::TRACE_SETUP, "Parse args");
 325
 326   Err err;
 327   args_tokens_ = Tokenizer::Tokenize(args_input_file_.get(), &err);
 328   if (err.has_error()) {
 329     err.PrintToStdout();
 330     return false;
 331   }
 332
 333   args_root_ = Parser::Parse(args_tokens_, &err);
 334   if (err.has_error()) {
 335     err.PrintToStdout();
 336     return false;
 337   }
 338
 339   Scope arg_scope(&dotfile_settings_);
 340   args_root_->Execute(&arg_scope, &err);
 341   if (err.has_error()) {
 342     err.PrintToStdout();
 343     return false;
 344   }
 345
 346   // Save the result of the command args.
 347   Scope::KeyValueMap overrides;
 348   arg_scope.GetCurrentScopeValues(&overrides);
 349   build_settings_.build_args().AddArgOverrides(overrides);
 350   return true;
 351 }
 352
 353 bool Setup::SaveArgsToFile() {
 354   ScopedTrace setup_trace(TraceItem::TRACE_SETUP, "Save args file");
 355
 356   std::ostringstream stream;
 357   for (const auto& pair : build_settings_.build_args().GetAllOverrides()) {
 358     stream << pair.first.as_string() << " = " << pair.second.ToString(true);
 359     stream << std::endl;
 360   }
 361
 362   // For the first run, the build output dir might not be created yet, so do
 363   // that so we can write a file into it. Ignore errors, we'll catch the error
 364   // when we try to write a file to it below.
 365   base::FilePath build_arg_file =
 366       build_settings_.GetFullPath(GetBuildArgFile());
 367   base::CreateDirectory(build_arg_file.DirName());
 368
 369   std::string contents = stream.str();
 370 #if defined(OS_WIN)
 371   // Use Windows lineendings for this file since it will often open in
 372   // Notepad which can't handle Unix ones.
 373   base::ReplaceSubstringsAfterOffset(&contents, 0, "\n", "\r\n");
 374 #endif
 375   if (base::WriteFile(build_arg_file, contents.c_str(),
 376       static_cast<int>(contents.size())) == -1) {
 377     Err(Location(), "Args file could not be written.",
 378       "The file is \"" + FilePathToUTF8(build_arg_file) +
 379         "\"").PrintToStdout();
 380     return false;
 381   }
 382
 383   // Add a dependency on the build arguments file. If this changes, we want
 384   // to re-generate the build.
 385   g_scheduler->AddGenDependency(build_arg_file);
 386
 387   return true;
 388 }
 389
 390 bool Setup::FillSourceDir(const base::CommandLine& cmdline) {
 391   // Find the .gn file.
 392   base::FilePath root_path;
 393
 394   // Prefer the command line args to the config file.
 395   base::FilePath relative_root_path =
 396       cmdline.GetSwitchValuePath(switches::kRoot);
 397   if (!relative_root_path.empty()) {
 398     root_path = base::MakeAbsoluteFilePath(relative_root_path);
 399     if (root_path.empty()) {
 400       Err(Location(), "Root source path not found.",
 401           "The path \"" + FilePathToUTF8(relative_root_path) +
 402           "\" doesn't exist.").PrintToStdout();
 403       return false;
 404     }
 405
 406     // When --root is specified, an alternate --dotfile can also be set.
 407     // --dotfile should be a real file path and not a "//foo" source-relative
 408     // path.
 409     base::FilePath dot_file_path =
 410         cmdline.GetSwitchValuePath(switches::kDotfile);
 411     if (dot_file_path.empty()) {
 412       dotfile_name_ = root_path.Append(kGnFile);
 413     } else {
 414       dotfile_name_ = base::MakeAbsoluteFilePath(dot_file_path);
 415       if (dotfile_name_.empty()) {
 416         Err(Location(), "Could not load dotfile.",
 417             "The file \"" + FilePathToUTF8(dot_file_path) +
 418             "\" cound't be loaded.").PrintToStdout();
 419         return false;
 420       }
 421     }
 422   } else {
 423     // In the default case, look for a dotfile and that also tells us where the
 424     // source root is.
 425     base::FilePath cur_dir;
 426     base::GetCurrentDirectory(&cur_dir);
 427     dotfile_name_ = FindDotFile(cur_dir);
 428     if (dotfile_name_.empty()) {
 429       Err(Location(), "Can't find source root.",
 430           "I could not find a \".gn\" file in the current directory or any "
 431           "parent,\nand the --root command-line argument was not specified.")
 432           .PrintToStdout();
 433       return false;
 434     }
 435     root_path = dotfile_name_.DirName();
 436   }
 437
 438   if (scheduler_.verbose_logging())
 439     scheduler_.Log("Using source root", FilePathToUTF8(root_path));
 440   build_settings_.SetRootPath(root_path);
 441
 442   return true;
 443 }
 444
 445 bool Setup::FillBuildDir(const std::string& build_dir, bool require_exists) {
 446   Err err;
 447   SourceDir resolved =
 448       SourceDirForCurrentDirectory(build_settings_.root_path()).
 449     ResolveRelativeDir(Value(nullptr, build_dir), &err,
 450         build_settings_.root_path_utf8());
 451   if (err.has_error()) {
 452     err.PrintToStdout();
 453     return false;
 454   }
 455
 456   if (scheduler_.verbose_logging())
 457     scheduler_.Log("Using build dir", resolved.value());
 458
 459   if (require_exists) {
 460     base::FilePath build_dir_path = build_settings_.GetFullPath(resolved);
 461     if (!base::PathExists(build_dir_path.Append(
 462             FILE_PATH_LITERAL("build.ninja")))) {
 463       Err(Location(), "Not a build directory.",
 464           "This command requires an existing build directory. I interpreted "
 465           "your input\n\"" + build_dir + "\" as:\n  " +
 466           FilePathToUTF8(build_dir_path) +
 467           "\nwhich doesn't seem to contain a previously-generated build.")
 468           .PrintToStdout();
 469       return false;
 470     }
 471   }
 472
 473   build_settings_.SetBuildDir(resolved);
 474   return true;
 475 }
 476
 477 void Setup::FillPythonPath() {
 478   // Trace this since it tends to be a bit slow on Windows.
 479   ScopedTrace setup_trace(TraceItem::TRACE_SETUP, "Fill Python Path");
 480 #if defined(OS_WIN)
 481   // Find Python on the path so we can use the absolute path in the build.
 482   const base::char16 kGetPython[] =
 483       L"cmd.exe /c python -c \"import sys; print sys.executable\"";
 484   std::string python_path;
 485   if (base::GetAppOutput(kGetPython, &python_path)) {
 486     base::TrimWhitespaceASCII(python_path, base::TRIM_ALL, &python_path);
 487     if (scheduler_.verbose_logging())
 488       scheduler_.Log("Found python", python_path);
 489   } else {
 490     scheduler_.Log("WARNING", "Could not find python on path, using "
 491         "just \"python.exe\"");
 492     python_path = "python.exe";
 493   }
 494   build_settings_.set_python_path(base::FilePath(base::UTF8ToUTF16(python_path))
 495                                       .NormalizePathSeparatorsTo('/'));
 496 #else
 497   build_settings_.set_python_path(base::FilePath("python"));
 498 #endif
 499 }
 500
 501 bool Setup::RunConfigFile() {
 502   if (scheduler_.verbose_logging())
 503     scheduler_.Log("Got dotfile", FilePathToUTF8(dotfile_name_));
 504
 505   dotfile_input_file_.reset(new InputFile(SourceFile("//.gn")));
 506   if (!dotfile_input_file_->Load(dotfile_name_)) {
 507     Err(Location(), "Could not load dotfile.",
 508         "The file \"" + FilePathToUTF8(dotfile_name_) + "\" cound't be loaded")
 509         .PrintToStdout();
 510     return false;
 511   }
 512
 513   Err err;
 514   dotfile_tokens_ = Tokenizer::Tokenize(dotfile_input_file_.get(), &err);
 515   if (err.has_error()) {
 516     err.PrintToStdout();
 517     return false;
 518   }
 519
 520   dotfile_root_ = Parser::Parse(dotfile_tokens_, &err);
 521   if (err.has_error()) {
 522     err.PrintToStdout();
 523     return false;
 524   }
 525
 526   dotfile_root_->Execute(&dotfile_scope_, &err);
 527   if (err.has_error()) {
 528     err.PrintToStdout();
 529     return false;
 530   }
 531
 532   return true;
 533 }
 534
 535 bool Setup::FillOtherConfig(const base::CommandLine& cmdline) {
 536   Err err;
 537   SourceDir current_dir("//");
 538
 539   // Secondary source path, read from the config file if present.
 540   // Read from the config file if present.
 541   const Value* secondary_value =
 542       dotfile_scope_.GetValue("secondary_source", true);
 543   if (secondary_value) {
 544     if (!secondary_value->VerifyTypeIs(Value::STRING, &err)) {
 545       err.PrintToStdout();
 546       return false;
 547     }
 548     build_settings_.SetSecondarySourcePath(
 549         SourceDir(secondary_value->string_value()));
 550   }
 551
 552   // Root build file.
 553   const Value* root_value = dotfile_scope_.GetValue("root", true);
 554   if (root_value) {
 555     if (!root_value->VerifyTypeIs(Value::STRING, &err)) {
 556       err.PrintToStdout();
 557       return false;
 558     }
 559
 560     Label root_target_label =
 561         Label::Resolve(current_dir, Label(), *root_value, &err);
 562     if (err.has_error()) {
 563       err.PrintToStdout();
 564       return false;
 565     }
 566
 567     root_build_file_ = Loader::BuildFileForLabel(root_target_label);
 568   }
 569
 570   // Build config file.
 571   const Value* build_config_value =
 572       dotfile_scope_.GetValue("buildconfig", true);
 573   if (!build_config_value) {
 574     Err(Location(), "No build config file.",
 575         "Your .gn file (\"" + FilePathToUTF8(dotfile_name_) + "\")\n"
 576         "didn't specify a \"buildconfig\" value.").PrintToStdout();
 577     return false;
 578   } else if (!build_config_value->VerifyTypeIs(Value::STRING, &err)) {
 579     err.PrintToStdout();
 580     return false;
 581   }
 582   build_settings_.set_build_config_file(
 583       SourceFile(build_config_value->string_value()));
 584
 585   // Targets to check.
 586   const Value* check_targets_value =
 587       dotfile_scope_.GetValue("check_targets", true);
 588   if (check_targets_value) {
 589     // Fill the list of targets to check.
 590     if (!check_targets_value->VerifyTypeIs(Value::LIST, &err)) {
 591       err.PrintToStdout();
 592       return false;
 593     }
 594
 595     check_patterns_.reset(new std::vector<LabelPattern>);
 596     for (const auto& item : check_targets_value->list_value()) {
 597       check_patterns_->push_back(
 598           LabelPattern::GetPattern(current_dir, item, &err));
 599       if (err.has_error()) {
 600         err.PrintToStdout();
 601         return false;
 602       }
 603     }
 604   }
 605
 606   // Fill exec_script_whitelist.
 607   const Value* exec_script_whitelist_value =
 608       dotfile_scope_.GetValue("exec_script_whitelist", true);
 609   if (exec_script_whitelist_value) {
 610     // Fill the list of targets to check.
 611     if (!exec_script_whitelist_value->VerifyTypeIs(Value::LIST, &err)) {
 612       err.PrintToStdout();
 613       return false;
 614     }
 615     scoped_ptr<std::set<SourceFile>> whitelist(new std::set<SourceFile>);
 616     for (const auto& item : exec_script_whitelist_value->list_value()) {
 617       if (!item.VerifyTypeIs(Value::STRING, &err)) {
 618         err.PrintToStdout();
 619         return false;
 620       }
 621       whitelist->insert(current_dir.ResolveRelativeFile(item, &err));
 622       if (err.has_error()) {
 623         err.PrintToStdout();
 624         return false;
 625       }
 626     }
 627     build_settings_.set_exec_script_whitelist(whitelist.Pass());
 628   }
 629
 630   return true;
 631 }