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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_writer.h"
#include "tools/gn/builder.h"
#include "tools/gn/loader.h"
#include "tools/gn/location.h"
#include "tools/gn/ninja_build_writer.h"
#include "tools/gn/ninja_toolchain_writer.h"
#include "tools/gn/settings.h"
NinjaWriter::NinjaWriter(const BuildSettings* build_settings,
Builder* builder)
: build_settings_(build_settings),
builder_(builder) {
}
NinjaWriter::~NinjaWriter() {
}
// static
bool NinjaWriter::RunAndWriteFiles(const BuildSettings* build_settings,
Builder* builder,
Err* err) {
NinjaWriter writer(build_settings, builder);
std::vector<const Settings*> all_settings;
std::vector<const Target*> default_targets;
if (!writer.WriteToolchains(&all_settings, &default_targets, err))
return false;
return writer.WriteRootBuildfiles(all_settings, default_targets, err);
}
// static
bool NinjaWriter::RunAndWriteToolchainFiles(
const BuildSettings* build_settings,
Builder* builder,
std::vector<const Settings*>* all_settings,
Err* err) {
NinjaWriter writer(build_settings, builder);
std::vector<const Target*> default_targets;
return writer.WriteToolchains(all_settings, &default_targets, err);
}
bool NinjaWriter::WriteToolchains(std::vector<const Settings*>* all_settings,
std::vector<const Target*>* default_targets,
Err* err) {
// Categorize all targets by toolchain.
typedef std::map<Label, std::vector<const Target*> > CategorizedMap;
CategorizedMap categorized;
std::vector<const BuilderRecord*> all_records = builder_->GetAllRecords();
for (const auto& all_record : all_records) {
if (all_record->type() == BuilderRecord::ITEM_TARGET &&
all_record->should_generate()) {
categorized[all_record->label().GetToolchainLabel()].push_back(
all_record->item()->AsTarget());
}
}
if (categorized.empty()) {
Err(Location(), "No targets.",
"I could not find any targets to write, so I'm doing nothing.")
.PrintToStdout();
return false;
}
Label default_label = builder_->loader()->GetDefaultToolchain();
// Write out the toolchain buildfiles, and also accumulate the set of
// all settings and find the list of targets in the default toolchain.
for (CategorizedMap::const_iterator i = categorized.begin();
i != categorized.end(); ++i) {
const Settings* settings =
builder_->loader()->GetToolchainSettings(i->first);
const Toolchain* toolchain = builder_->GetToolchain(i->first);
all_settings->push_back(settings);
if (!NinjaToolchainWriter::RunAndWriteFile(settings, toolchain,
i->second)) {
Err(Location(),
"Couldn't open toolchain buildfile(s) for writing").PrintToStdout();
return false;
}
}
*default_targets = categorized[default_label];
return true;
}
bool NinjaWriter::WriteRootBuildfiles(
const std::vector<const Settings*>& all_settings,
const std::vector<const Target*>& default_targets,
Err* err) {
// All Settings objects should have the same default toolchain, and there
// should always be at least one settings object in the build.
CHECK(!all_settings.empty());
const Toolchain* default_toolchain =
builder_->GetToolchain(all_settings[0]->default_toolchain_label());
// Write the root buildfile.
return NinjaBuildWriter::RunAndWriteFile(build_settings_, all_settings,
default_toolchain, default_targets,
err);
}
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