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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 "tools/gn/ninja_build_writer.h"
#include <fstream>
#include "base/command_line.h"
#include "base/file_util.h"
#include "base/process/process_handle.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "tools/gn/build_settings.h"
#include "tools/gn/escape.h"
#include "tools/gn/filesystem_utils.h"
#include "tools/gn/input_file_manager.h"
#include "tools/gn/scheduler.h"
#include "tools/gn/target.h"
#if defined(OS_WIN)
#include <windows.h>
#endif
namespace {
std::string GetSelfInvocationCommand(const BuildSettings* build_settings) {
#if defined(OS_WIN)
wchar_t module[MAX_PATH];
GetModuleFileName(NULL, module, MAX_PATH);
//result = "\"" + WideToUTF8(module) + "\"";
base::FilePath executable(module);
#elif defined(OS_MACOSX)
// FIXME(brettw) write this on Mac!
base::FilePath executable("../Debug/gn");
#else
base::FilePath executable =
base::GetProcessExecutablePath(base::GetCurrentProcessHandle());
#endif
/*
// Append the root path.
CommandLine* cmdline = CommandLine::ForCurrentProcess();
result += " --root=\"" + FilePathToUTF8(settings->root_path()) + "\"";
*/
CommandLine cmdline(executable);
cmdline.AppendSwitchPath("--root", build_settings->root_path());
// TODO(brettw) append other parameters.
#if defined(OS_WIN)
return WideToUTF8(cmdline.GetCommandLineString());
#else
return cmdline.GetCommandLineString();
#endif
}
} // namespace
NinjaBuildWriter::NinjaBuildWriter(
const BuildSettings* build_settings,
const std::vector<const Settings*>& all_settings,
const std::vector<const Target*>& default_toolchain_targets,
std::ostream& out)
: build_settings_(build_settings),
all_settings_(all_settings),
default_toolchain_targets_(default_toolchain_targets),
out_(out),
path_output_(build_settings->build_dir(), ESCAPE_NINJA, true),
helper_(build_settings) {
}
NinjaBuildWriter::~NinjaBuildWriter() {
}
void NinjaBuildWriter::Run() {
WriteNinjaRules();
WriteSubninjas();
WritePhonyAndAllRules();
}
// static
bool NinjaBuildWriter::RunAndWriteFile(
const BuildSettings* build_settings,
const std::vector<const Settings*>& all_settings,
const std::vector<const Target*>& default_toolchain_targets) {
base::FilePath ninja_file(build_settings->GetFullPath(
SourceFile(build_settings->build_dir().value() + "build.ninja")));
file_util::CreateDirectory(ninja_file.DirName());
std::ofstream file;
file.open(FilePathToUTF8(ninja_file).c_str(),
std::ios_base::out | std::ios_base::binary);
if (file.fail())
return false;
NinjaBuildWriter gen(build_settings, all_settings,
default_toolchain_targets, file);
gen.Run();
return true;
}
void NinjaBuildWriter::WriteNinjaRules() {
out_ << "rule gn\n";
out_ << " command = " << GetSelfInvocationCommand(build_settings_) << "\n";
out_ << " description = GN the world\n\n";
out_ << "build build.ninja: gn";
// Input build files.
std::vector<base::FilePath> input_files;
g_scheduler->input_file_manager()->GetAllPhysicalInputFileNames(&input_files);
EscapeOptions ninja_options;
ninja_options.mode = ESCAPE_NINJA;
for (size_t i = 0; i < input_files.size(); i++)
out_ << " " << EscapeString(FilePathToUTF8(input_files[i]), ninja_options);
// Other files read by the build.
std::vector<base::FilePath> other_files = g_scheduler->GetGenDependencies();
for (size_t i = 0; i < other_files.size(); i++)
out_ << " " << EscapeString(FilePathToUTF8(other_files[i]), ninja_options);
out_ << std::endl << std::endl;
}
void NinjaBuildWriter::WriteSubninjas() {
for (size_t i = 0; i < all_settings_.size(); i++) {
out_ << "subninja ";
path_output_.WriteFile(out_,
helper_.GetNinjaFileForToolchain(all_settings_[i]));
out_ << std::endl;
}
out_ << std::endl;
}
void NinjaBuildWriter::WritePhonyAndAllRules() {
std::string all_rules;
// Write phony rules for the default toolchain (don't do other toolchains or
// we'll get naming conflicts).
for (size_t i = 0; i < default_toolchain_targets_.size(); i++) {
const Target* target = default_toolchain_targets_[i];
OutputFile target_file = helper_.GetTargetOutputFile(target);
if (target_file.value() != target->label().name()) {
out_ << "build " << target->label().name() << ": phony ";
path_output_.WriteFile(out_, target_file);
out_ << std::endl;
}
if (!all_rules.empty())
all_rules.append(" $\n ");
all_rules.append(target_file.value());
}
if (!all_rules.empty()) {
out_ << "\nbuild all: phony " << all_rules << std::endl;
out_ << "default all" << std::endl;
}
}
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