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

tools/gn/copy_target_generator.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/copy_target_generator.h"
 
 #include "tools/gn/build_settings.h"
 #include "tools/gn/filesystem_utils.h"
 #include "tools/gn/parse_tree.h"
 #include "tools/gn/scope.h"
@@ skipping 24 matching lines @@
   }
   if (target_->action_values().outputs().list().size() != 1) {
     *err_ = Err(function_call_, "Copy command must have exactly one output.",
         "You must specify exactly one value in the \"outputs\" array for the "
         "destination of the copy\n(see \"gn help copy\"). If there are "
         "multiple sources to copy, use source expansion\n(see \"gn help "
         "source_expansion\").");
     return;
   }
 }
+
+CopyBundleDataTargetGenerator::CopyBundleDataTargetGenerator(

[brettw, 2016/01/20 22:23:17]

I don't like having this one class in the same file as another when nothing else
works this way.

If you feel like a separate file is too stupid, we can pass the target type in
the constructor and have the copy class do both things (the binary target writer
does this).

Actually, since the ninja target writer is shared with the regular copy target
type, the generator should probably be the same class also.

[sdefresne, 2016/01/21 22:00:56]

Merged.

+    Target* target,
+    Scope* scope,
+    const FunctionCallNode* function_call,
+    Err* err)
+    : TargetGenerator(target, scope, function_call, err) {
+}
+
+CopyBundleDataTargetGenerator::~CopyBundleDataTargetGenerator() {
+}
+
+void CopyBundleDataTargetGenerator::DoRun() {
+  target_->set_output_type(Target::COPY_BUNDLE_DATA);
+
+  if (!FillOutputs(true))
+    return;
+
+  if (target_->action_values().outputs().list().size() != 1) {
+    *err_ = Err(function_call_, "Copy command must have exactly one output.",
+        "You must specify exactly one value in the \"outputs\" array for the "
+        "destination of the copy\n(see \"gn help copy\"). If there are "
+        "multiple sources to copy, use source expansion\n(see \"gn help "
+        "source_expansion\").");
+    return;
+  }
+}