GN threading refactor

tools/gn/ninja_target_writer.cc

 // 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"
@@ skipping 17 matching lines @@
       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;
-
+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));
 
-  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);
+    NinjaCopyTargetWriter writer(target, toolchain, file);
     writer.Run();
   } else if (target->output_type() == Target::CUSTOM) {
-    NinjaScriptTargetWriter writer(target, tc, file);
+    NinjaScriptTargetWriter writer(target, toolchain, file);
     writer.Run();
   } else if (target->output_type() == Target::GROUP) {
-    NinjaGroupTargetWriter writer(target, tc, file);
+    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, tc, file);
+    NinjaBinaryTargetWriter writer(target, toolchain, file);
     writer.Run();
   } else {
     CHECK(0);
   }
 
   std::string contents = file.str();
   file_util::WriteFile(ninja_file, contents.c_str(),
                        static_cast<int>(contents.size()));
 }
 
@@ skipping 28 matching lines @@
   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);
 }