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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/atomicops.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "base/timer/elapsed_timer.h"
#include "tools/gn/build_settings.h"
#include "tools/gn/commands.h"
#include "tools/gn/ninja_target_writer.h"
#include "tools/gn/ninja_writer.h"
#include "tools/gn/scheduler.h"
#include "tools/gn/setup.h"
#include "tools/gn/standard_out.h"
#include "tools/gn/target.h"
namespace commands {
namespace {
// Suppress output on success.
const char kSwitchQuiet[] = "q";
const char kSwitchCheck[] = "check";
// Called on worker thread to write the ninja file.
void BackgroundDoWrite(const Target* target) {
NinjaTargetWriter::RunAndWriteFile(target);
g_scheduler->DecrementWorkCount();
}
// Called on the main thread.
void ItemResolvedCallback(base::subtle::Atomic32* write_counter,
scoped_refptr<Builder> builder,
const BuilderRecord* record) {
base::subtle::NoBarrier_AtomicIncrement(write_counter, 1);
const Item* item = record->item();
const Target* target = item->AsTarget();
if (target) {
g_scheduler->IncrementWorkCount();
g_scheduler->ScheduleWork(base::Bind(&BackgroundDoWrite, target));
}
}
} // namespace
const char kGen[] = "gen";
const char kGen_HelpShort[] =
"gen: Generate ninja files.";
const char kGen_Help[] =
"gn gen: Generate ninja files.\n"
"\n"
" gn gen <output_directory>\n"
"\n"
" Generates ninja files from the current tree and puts them in the given\n"
" output directory.\n"
"\n"
" The output directory can be a source-repo-absolute path name such as:\n"
" //out/foo\n"
" Or it can be a directory relative to the current directory such as:\n"
" out/foo\n"
"\n"
" See \"gn help\" for the common command-line switches.\n";
int RunGen(const std::vector<std::string>& args) {
base::ElapsedTimer timer;
if (args.size() != 1) {
Err(Location(), "Need exactly one build directory to generate.",
"I expected something more like \"gn gen out/foo\"\n"
"You can also see \"gn help gen\".").PrintToStdout();
return 1;
}
// Deliberately leaked to avoid expensive process teardown.
Setup* setup = new Setup();
if (!setup->DoSetup(args[0], true))
return 1;
if (CommandLine::ForCurrentProcess()->HasSwitch(kSwitchCheck))
setup->set_check_public_headers(true);
// Cause the load to also generate the ninja files for each target. We wrap
// the writing to maintain a counter.
base::subtle::Atomic32 write_counter = 0;
setup->builder()->set_resolved_callback(
base::Bind(&ItemResolvedCallback, &write_counter,
scoped_refptr<Builder>(setup->builder())));
// Do the actual load. This will also write out the target ninja files.
if (!setup->Run())
return 1;
Err err;
// Write the root ninja files.
if (!NinjaWriter::RunAndWriteFiles(&setup->build_settings(),
setup->builder(),
&err)) {
err.PrintToStdout();
return 1;
}
base::TimeDelta elapsed_time = timer.Elapsed();
if (!CommandLine::ForCurrentProcess()->HasSwitch(kSwitchQuiet)) {
OutputString("Done. ", DECORATION_GREEN);
std::string stats = "Wrote " +
base::IntToString(static_cast<int>(write_counter)) +
" targets from " +
base::IntToString(
setup->scheduler().input_file_manager()->GetInputFileCount()) +
" files in " +
base::IntToString(elapsed_time.InMilliseconds()) + "ms\n";
OutputString(stats);
}
return 0;
}
} // namespace commands
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