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// 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"
#include "tools/gn/standard_out.h"
// Only the GN-generated build makes this header for now.
// TODO(brettw) consider adding this if we need it in GYP.
#if defined(GN_BUILD)
#include "tools/gn/last_commit_position.h"
#else
#define LAST_COMMIT_POSITION "UNKNOWN"
#endif
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 (const auto& arg : in_args)
out_args.push_back(base::WideToUTF8(arg));
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") || cmdline.HasSwitch("h")) {
// Make "-h" and "--help" default to help command.
command = commands::kHelp;
} else if (cmdline.HasSwitch("version")) {
// Make "--version" print the version and exit.
OutputString(std::string(LAST_COMMIT_POSITION) + "\n");
exit(0);
} else if (args.empty()) {
// No command, print error and exit.
Err(Location(), "No command specified.",
"Most commonly you want \"gn gen <out_dir>\" to make a build dir.\n"
"Or try \"gn help\" for more commands.").PrintToStdout();
return 1;
} else {
command = args[0];
args.erase(args.begin());
}
const commands::CommandInfoMap& command_map = commands::GetCommands();
commands::CommandInfoMap::const_iterator found_command =
command_map.find(command);
int retval;
if (found_command != command_map.end()) {
retval = found_command->second.runner(args);
} 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!
}
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