| // 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_action_target_writer.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/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), |
| helper_(settings_->build_settings()) { |
| } |
| |
| NinjaTargetWriter::~NinjaTargetWriter() { |
| } |
| |
| // static |
| void NinjaTargetWriter::RunAndWriteFile(const Target* target, |
| const Toolchain* toolchain) { |
| 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)); |
| |
| base::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, toolchain, file); |
| writer.Run(); |
| } else if (target->output_type() == Target::ACTION || |
| target->output_type() == Target::ACTION_FOREACH) { |
| NinjaActionTargetWriter writer(target, toolchain, file); |
| writer.Run(); |
| } else if (target->output_type() == Target::GROUP) { |
| NinjaGroupTargetWriter writer(target, toolchain, 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, toolchain, file); |
| writer.Run(); |
| } else { |
| CHECK(0); |
| } |
| |
| std::string contents = file.str(); |
| base::WriteFile(ninja_file, contents.c_str(), |
| static_cast<int>(contents.size())); |
| } |
| |
| std::string NinjaTargetWriter::WriteInputDepsStampAndGetDep( |
| const std::vector<const Target*>& extra_hard_deps) const { |
| // For an action (where we run a script only once) the sources are the same |
| // as the source prereqs. |
| bool list_sources_as_input_deps = target_->output_type() == Target::ACTION; |
| |
| // Actions get implicit dependencies on the script itself. |
| bool add_script_source_as_dep = target_->output_type() == Target::ACTION || |
| target_->output_type() == Target::ACTION_FOREACH; |
| |
| if (!add_script_source_as_dep && |
| extra_hard_deps.empty() && |
| target_->inputs().empty() && |
| target_->recursive_hard_deps().empty() && |
| (!list_sources_as_input_deps || target_->sources().empty())) |
| return std::string(); // No input/hard deps. |
| |
| // One potential optimization is if there are few input dependencies (or |
| // potentially few sources that depend on these) it's better to just write |
| // all hard deps on each sources line than have this intermediate stamp. We |
| // do the stamp file because duplicating all the order-only deps for each |
| // source file can really explode the ninja file but this won't be the most |
| // optimal thing in all cases. |
| |
| OutputFile input_stamp_file = helper_.GetTargetOutputDir(target_); |
| input_stamp_file.value().append(target_->label().name()); |
| input_stamp_file.value().append(".inputdeps.stamp"); |
| |
| std::ostringstream stamp_file_stream; |
| path_output_.WriteFile(stamp_file_stream, input_stamp_file); |
| std::string stamp_file_string = stamp_file_stream.str(); |
| |
| out_ << "build " << stamp_file_string << ": " + |
| helper_.GetRulePrefix(settings_) + "stamp"; |
| |
| // Script file (if applicable). |
| if (add_script_source_as_dep) { |
| out_ << " "; |
| path_output_.WriteFile(out_, target_->action_values().script()); |
| } |
| |
| // Input files are order-only deps. |
| const Target::FileList& prereqs = target_->inputs(); |
| for (size_t i = 0; i < prereqs.size(); i++) { |
| out_ << " "; |
| path_output_.WriteFile(out_, prereqs[i]); |
| } |
| if (list_sources_as_input_deps) { |
| const Target::FileList& sources = target_->sources(); |
| for (size_t i = 0; i < sources.size(); i++) { |
| out_ << " "; |
| path_output_.WriteFile(out_, sources[i]); |
| } |
| } |
| |
| // Add on any hard deps that are direct or indirect dependencies. |
| const std::set<const Target*>& hard_deps = target_->recursive_hard_deps(); |
| for (std::set<const Target*>::const_iterator i = hard_deps.begin(); |
| i != hard_deps.end(); ++i) { |
| out_ << " "; |
| path_output_.WriteFile(out_, helper_.GetTargetOutputFile(*i)); |
| } |
| |
| // Extra hard deps passed in. |
| for (size_t i = 0; i < extra_hard_deps.size(); i++) { |
| out_ << " "; |
| path_output_.WriteFile(out_, |
| helper_.GetTargetOutputFile(extra_hard_deps[i])); |
| } |
| |
| out_ << "\n"; |
| return " | " + stamp_file_string; |
| } |
| |
| FileTemplate NinjaTargetWriter::GetOutputTemplate() const { |
| const Target::FileList& outputs = target_->action_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(target_->settings(), output_template_args); |
| } |