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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_toolchain_writer.h"
#include <fstream>
#include "base/files/file_util.h"
#include "base/strings/stringize_macros.h"
#include "tools/gn/build_settings.h"
#include "tools/gn/filesystem_utils.h"
#include "tools/gn/ninja_utils.h"
#include "tools/gn/settings.h"
#include "tools/gn/substitution_writer.h"
#include "tools/gn/target.h"
#include "tools/gn/toolchain.h"
#include "tools/gn/trace.h"
namespace {
const char kIndent[] = " ";
} // namespace
NinjaToolchainWriter::NinjaToolchainWriter(
const Settings* settings,
const Toolchain* toolchain,
const std::vector<const Target*>& targets,
std::ostream& out)
: settings_(settings),
toolchain_(toolchain),
targets_(targets),
out_(out),
path_output_(settings_->build_settings()->build_dir(),
settings_->build_settings()->root_path_utf8(),
ESCAPE_NINJA) {
}
NinjaToolchainWriter::~NinjaToolchainWriter() {
}
void NinjaToolchainWriter::Run() {
WriteRules();
WriteSubninjas();
}
// static
bool NinjaToolchainWriter::RunAndWriteFile(
const Settings* settings,
const Toolchain* toolchain,
const std::vector<const Target*>& targets) {
base::FilePath ninja_file(settings->build_settings()->GetFullPath(
GetNinjaFileForToolchain(settings)));
ScopedTrace trace(TraceItem::TRACE_FILE_WRITE, FilePathToUTF8(ninja_file));
base::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;
NinjaToolchainWriter gen(settings, toolchain, targets, file);
gen.Run();
return true;
}
void NinjaToolchainWriter::WriteRules() {
std::string rule_prefix = GetNinjaRulePrefixForToolchain(settings_);
for (int i = Toolchain::TYPE_NONE + 1; i < Toolchain::TYPE_NUMTYPES; i++) {
Toolchain::ToolType tool_type = static_cast<Toolchain::ToolType>(i);
const Tool* tool = toolchain_->GetTool(tool_type);
if (tool)
WriteToolRule(tool_type, tool, rule_prefix);
}
out_ << std::endl;
}
void NinjaToolchainWriter::WriteToolRule(const Toolchain::ToolType type,
const Tool* tool,
const std::string& rule_prefix) {
out_ << "rule " << rule_prefix << Toolchain::ToolTypeToName(type)
<< std::endl;
// Rules explicitly include shell commands, so don't try to escape.
EscapeOptions options;
options.mode = ESCAPE_NINJA_PREFORMATTED_COMMAND;
CHECK(!tool->command().empty()) << "Command should not be empty";
WriteRulePattern("command", tool->command(), options);
WriteRulePattern("description", tool->description(), options);
WriteRulePattern("rspfile", tool->rspfile(), options);
WriteRulePattern("rspfile_content", tool->rspfile_content(), options);
if (tool->depsformat() == Tool::DEPS_GCC) {
// GCC-style deps require a depfile.
if (!tool->depfile().empty()) {
WriteRulePattern("depfile", tool->depfile(), options);
out_ << kIndent << "deps = gcc" << std::endl;
}
} else if (tool->depsformat() == Tool::DEPS_MSVC) {
// MSVC deps don't have a depfile.
out_ << kIndent << "deps = msvc" << std::endl;
}
// The link pool applies to linker tools. Don't count TYPE_ALINK since
// static libraries are not generally intensive to write.
if (type == Toolchain::TYPE_SOLINK ||
type == Toolchain::TYPE_SOLINK_MODULE ||
type == Toolchain::TYPE_LINK) {
out_ << kIndent << "pool = link_pool\n";
}
if (tool->restat())
out_ << kIndent << "restat = 1" << std::endl;
}
void NinjaToolchainWriter::WriteRulePattern(const char* name,
const SubstitutionPattern& pattern,
const EscapeOptions& options) {
if (pattern.empty())
return;
out_ << kIndent << name << " = ";
SubstitutionWriter::WriteWithNinjaVariables(pattern, options, out_);
out_ << std::endl;
}
void NinjaToolchainWriter::WriteSubninjas() {
// Write subninja commands for each generated target.
for (const auto& target : targets_) {
OutputFile ninja_file(target->settings()->build_settings(),
GetNinjaFileForTarget(target));
out_ << "subninja ";
path_output_.WriteFile(out_, ninja_file);
out_ << std::endl;
}
out_ << std::endl;
}
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