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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_target_writer.h"
#include <fstream>
#include <sstream>
#include "base/file_util.h"
#include "tools/gn/err.h"
#include "tools/gn/file_template.h"
#include "tools/gn/ninja_binary_target_writer.h"
#include "tools/gn/ninja_copy_target_writer.h"
#include "tools/gn/ninja_group_target_writer.h"
#include "tools/gn/ninja_script_target_writer.h"
#include "tools/gn/scheduler.h"
#include "tools/gn/string_utils.h"
#include "tools/gn/target.h"
#include "tools/gn/trace.h"
NinjaTargetWriter::NinjaTargetWriter(const Target* target,
const Toolchain* toolchain,
std::ostream& out)
: settings_(target->settings()),
target_(target),
toolchain_(toolchain),
out_(out),
path_output_(settings_->build_settings()->build_dir(),
ESCAPE_NINJA, true),
helper_(settings_->build_settings()) {
}
NinjaTargetWriter::~NinjaTargetWriter() {
}
// static
void NinjaTargetWriter::RunAndWriteFile(const Target* target) {
// External targets don't get written to disk, we assume they're managed by
// an external program. If we're not using an external generator, this is
// ignored.
if (target->settings()->build_settings()->using_external_generator() &&
target->external())
return;
const Settings* settings = target->settings();
NinjaHelper helper(settings->build_settings());
ScopedTrace trace(TraceItem::TRACE_FILE_WRITE,
target->label().GetUserVisibleName(false));
trace.SetToolchain(settings->toolchain_label());
base::FilePath ninja_file(settings->build_settings()->GetFullPath(
helper.GetNinjaFileForTarget(target).GetSourceFile(
settings->build_settings())));
if (g_scheduler->verbose_logging())
g_scheduler->Log("Writing", FilePathToUTF8(ninja_file));
const Toolchain* tc = settings->build_settings()->toolchain_manager()
.GetToolchainDefinitionUnlocked(settings->toolchain_label());
CHECK(tc);
file_util::CreateDirectory(ninja_file.DirName());
// It's rediculously faster to write to a string and then write that to
// disk in one operation than to use an fstream here.
std::stringstream file;
// Call out to the correct sub-type of writer.
if (target->output_type() == Target::COPY_FILES) {
NinjaCopyTargetWriter writer(target, tc, file);
writer.Run();
} else if (target->output_type() == Target::CUSTOM) {
NinjaScriptTargetWriter writer(target, tc, file);
writer.Run();
} else if (target->output_type() == Target::GROUP) {
NinjaGroupTargetWriter writer(target, tc, file);
writer.Run();
} else if (target->output_type() == Target::EXECUTABLE ||
target->output_type() == Target::STATIC_LIBRARY ||
target->output_type() == Target::SHARED_LIBRARY ||
target->output_type() == Target::SOURCE_SET) {
NinjaBinaryTargetWriter writer(target, tc, file);
writer.Run();
} else {
CHECK(0);
}
std::string contents = file.str();
file_util::WriteFile(ninja_file, contents.c_str(),
static_cast<int>(contents.size()));
}
std::string NinjaTargetWriter::GetSourcesImplicitDeps() const {
std::ostringstream ret;
ret << " |";
// Input files are order-only deps.
const Target::FileList& prereqs = target_->source_prereqs();
bool has_files = !prereqs.empty();
for (size_t i = 0; i < prereqs.size(); i++) {
ret << " ";
path_output_.WriteFile(ret, prereqs[i]);
}
// Add on any direct deps marked as "hard".
const LabelTargetVector& deps = target_->deps();
for (size_t i = 0; i < deps.size(); i++) {
if (deps[i].ptr->hard_dep()) {
has_files = true;
ret << " ";
path_output_.WriteFile(ret, helper_.GetTargetOutputFile(deps[i].ptr));
}
}
if (has_files)
return ret.str();
return std::string(); // No files added.
}
FileTemplate NinjaTargetWriter::GetOutputTemplate() const {
const Target::FileList& outputs = target_->script_values().outputs();
std::vector<std::string> output_template_args;
for (size_t i = 0; i < outputs.size(); i++) {
// All outputs should be in the output dir.
output_template_args.push_back(
RemovePrefix(outputs[i].value(),
settings_->build_settings()->build_dir().value()));
}
return FileTemplate(output_template_args);
}
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