Allow typing label names on Windows by not treating things that start with slashes as arguments rat…

tools/gn/gn_main.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "tools/gn/commands.h"
 #include "tools/gn/err.h"
 #include "tools/gn/location.h"
 
 namespace {
 
 std::vector<std::string> GetArgs(const CommandLine& cmdline) {
   CommandLine::StringVector in_args = cmdline.GetArgs();
 #if defined(OS_WIN)
   std::vector<std::string> out_args;
   for (size_t i = 0; i < in_args.size(); i++)
     out_args.push_back(base::WideToUTF8(in_args[i]));
   return out_args;
 #else
   return in_args;
 #endif
 }
 
 }  // namespace
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
+#if defined(OS_WIN)
+  CommandLine::set_slash_is_not_a_switch();
+#endif
   CommandLine::Init(argc, argv);
 
   const CommandLine& cmdline = *CommandLine::ForCurrentProcess();
   std::vector<std::string> args = GetArgs(cmdline);
 
   std::string command;
   if (cmdline.HasSwitch("help")) {
     // Make "--help" default to help command.
     command = commands::kHelp;
   } else if (args.empty()) {
@@ skipping 13 matching lines @@
   } else {
     Err(Location(),
         "Command \"" + command + "\" unknown.").PrintToStdout();
     commands::RunHelp(std::vector<std::string>());
     retval = 1;
   }
 
   exit(retval);  // Don't free memory, it can be really slow!
   return retval;
 }