Add support for Mac/iOS application bundles to GN tool.

tools/gn/ninja_copy_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_copy_target_writer.h"
 
 #include "base/strings/string_util.h"
 #include "tools/gn/ninja_utils.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/scheduler.h"
 #include "tools/gn/string_utils.h"
 #include "tools/gn/substitution_list.h"
 #include "tools/gn/substitution_writer.h"
 #include "tools/gn/target.h"
 #include "tools/gn/toolchain.h"
 
 NinjaCopyTargetWriter::NinjaCopyTargetWriter(const Target* target,
-                                             std::ostream& out)
-    : NinjaTargetWriter(target, out) {
+                                             std::ostream& out,
+                                             Toolchain::ToolType tool_type)
+    : NinjaTargetWriter(target, out), tool_type_(tool_type) {
 }
 
 NinjaCopyTargetWriter::~NinjaCopyTargetWriter() {
 }
 
 void NinjaCopyTargetWriter::Run() {
-  const Tool* copy_tool = target_->toolchain()->GetTool(Toolchain::TYPE_COPY);
+  const Tool* copy_tool = target_->toolchain()->GetTool(tool_type_);
   if (!copy_tool) {
     g_scheduler->FailWithError(Err(
         nullptr, "Copy tool not defined",
         "The toolchain " +
             target_->toolchain()->label().GetUserVisibleName(false) +
             "\n used by target " + target_->label().GetUserVisibleName(false) +
             "\n doesn't define a \"copy\" tool."));
     return;
   }
 
@@ skipping 23 matching lines @@
 
 void NinjaCopyTargetWriter::WriteCopyRules(
     std::vector<OutputFile>* output_files) {
   CHECK(target_->action_values().outputs().list().size() == 1);
   const SubstitutionList& output_subst_list =
       target_->action_values().outputs();
   CHECK_EQ(1u, output_subst_list.list().size())
       << "Should have one entry exactly.";
   const SubstitutionPattern& output_subst = output_subst_list.list()[0];
 
-  std::string tool_name =
-      GetNinjaRulePrefixForToolchain(settings_) +
-      Toolchain::ToolTypeToName(Toolchain::TYPE_COPY);
+  std::string tool_name = GetNinjaRulePrefixForToolchain(settings_) +
+                          Toolchain::ToolTypeToName(tool_type_);
 
   OutputFile input_dep =
       WriteInputDepsStampAndGetDep(std::vector<const Target*>());
 
   // Note that we don't write implicit deps for copy steps. "copy" only
   // depends on the output files themselves, rather than having includes
   // (the possibility of generated #includes is the main reason for implicit
   // dependencies).
   //
   // It would seem that specifying implicit dependencies on the deps of the
@@ skipping 27 matching lines @@
     path_output_.WriteFile(out_, output_file);
     out_ << ": " << tool_name << " ";
     path_output_.WriteFile(out_, input_file);
     if (!input_dep.value().empty()) {
       out_ << " || ";
       path_output_.WriteFile(out_, input_dep);
     }
     out_ << std::endl;
   }
 }