gin/shell/gin_main.cc

   1 // Copyright 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 "base/at_exit.h"
   6 #include "base/bind.h"
   7 #include "base/command_line.h"
   8 #include "base/files/file_util.h"
   9 #include "base/i18n/icu_util.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "gin/array_buffer.h"
  12 #include "gin/modules/console.h"
  13 #include "gin/modules/module_runner_delegate.h"
  14 #include "gin/public/isolate_holder.h"
  15 #include "gin/try_catch.h"
  16
  17 namespace gin {
  18 namespace {
  19
  20 std::string Load(const base::FilePath& path) {
  21   std::string source;
  22   if (!ReadFileToString(path, &source))
  23     LOG(FATAL) << "Unable to read " << path.LossyDisplayName();
  24   return source;
  25 }
  26
  27 void Run(base::WeakPtr<Runner> runner, const base::FilePath& path) {
  28   if (!runner)
  29     return;
  30   Runner::Scope scope(runner.get());
  31   runner->Run(Load(path), path.AsUTF8Unsafe());
  32 }
  33
  34 std::vector<base::FilePath> GetModuleSearchPaths() {
  35   std::vector<base::FilePath> module_base(1);
  36   CHECK(base::GetCurrentDirectory(&module_base[0]));
  37   return module_base;
  38 }
  39
  40 class GinShellRunnerDelegate : public ModuleRunnerDelegate {
  41  public:
  42   GinShellRunnerDelegate() : ModuleRunnerDelegate(GetModuleSearchPaths()) {
  43     AddBuiltinModule(Console::kModuleName, Console::GetModule);
  44   }
  45
  46   void UnhandledException(ShellRunner* runner, TryCatch& try_catch) override {
  47     ModuleRunnerDelegate::UnhandledException(runner, try_catch);
  48     LOG(ERROR) << try_catch.GetStackTrace();
  49   }
  50
  51  private:
  52   DISALLOW_COPY_AND_ASSIGN(GinShellRunnerDelegate);
  53 };
  54
  55 }  // namespace
  56 }  // namespace gin
  57
  58 int main(int argc, char** argv) {
  59   base::AtExitManager at_exit;
  60   base::CommandLine::Init(argc, argv);
  61   base::i18n::InitializeICU();
  62 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
  63   gin::IsolateHolder::LoadV8Snapshot();
  64 #endif
  65
  66   gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
  67                                  gin::ArrayBufferAllocator::SharedInstance());
  68   gin::IsolateHolder instance;
  69
  70   base::MessageLoop message_loop;
  71
  72   gin::GinShellRunnerDelegate delegate;
  73   gin::ShellRunner runner(&delegate, instance.isolate());
  74
  75   {
  76     gin::Runner::Scope scope(&runner);
  77     v8::V8::SetCaptureStackTraceForUncaughtExceptions(true);
  78   }
  79
  80   base::CommandLine::StringVector args =
  81       base::CommandLine::ForCurrentProcess()->GetArgs();
  82   for (base::CommandLine::StringVector::const_iterator it = args.begin();
  83        it != args.end(); ++it) {
  84     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
  85         gin::Run, runner.GetWeakPtr(), base::FilePath(*it)));
  86   }
  87
  88   message_loop.RunUntilIdle();
  89   return 0;
  90 }