Upstream version 5.34.92.0
[platform/framework/web/crosswalk.git] / src / tools / gn / gn_main.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 "base/at_exit.h"
6 #include "base/command_line.h"
7 #include "base/strings/utf_string_conversions.h"
8 #include "tools/gn/commands.h"
9 #include "tools/gn/err.h"
10 #include "tools/gn/location.h"
11 #include "tools/gn/standard_out.h"
12
13 // Only the GN-generated build makes this header for now.
14 // TODO(brettw) consider adding this if we need it in GYP.
15 #if defined(GN_BUILD)
16 #include "build/util/last_change.h"
17 #else
18 #define LAST_CHANGE "UNKNOWN"
19 #endif
20
21 namespace {
22
23 std::vector<std::string> GetArgs(const CommandLine& cmdline) {
24   CommandLine::StringVector in_args = cmdline.GetArgs();
25 #if defined(OS_WIN)
26   std::vector<std::string> out_args;
27   for (size_t i = 0; i < in_args.size(); i++)
28     out_args.push_back(base::WideToUTF8(in_args[i]));
29   return out_args;
30 #else
31   return in_args;
32 #endif
33 }
34
35 }  // namespace
36
37 int main(int argc, char** argv) {
38   base::AtExitManager at_exit;
39 #if defined(OS_WIN)
40   CommandLine::set_slash_is_not_a_switch();
41 #endif
42   CommandLine::Init(argc, argv);
43
44   const CommandLine& cmdline = *CommandLine::ForCurrentProcess();
45   std::vector<std::string> args = GetArgs(cmdline);
46
47   std::string command;
48   if (cmdline.HasSwitch("help") || cmdline.HasSwitch("h")) {
49     // Make "-h" and "--help" default to help command.
50     command = commands::kHelp;
51   } else if (cmdline.HasSwitch("version")) {
52     // Make "--version" print the version and exit.
53     OutputString(std::string(LAST_CHANGE) + "\n");
54     exit(0);
55   } else if (args.empty()) {
56     command = commands::kGen;
57   } else {
58     command = args[0];
59     args.erase(args.begin());
60   }
61
62   const commands::CommandInfoMap& command_map = commands::GetCommands();
63   commands::CommandInfoMap::const_iterator found_command =
64       command_map.find(command);
65
66   int retval;
67   if (found_command != command_map.end()) {
68     retval = found_command->second.runner(args);
69   } else {
70     Err(Location(),
71         "Command \"" + command + "\" unknown.").PrintToStdout();
72     commands::RunHelp(std::vector<std::string>());
73     retval = 1;
74   }
75
76   exit(retval);  // Don't free memory, it can be really slow!
77   return retval;
78 }