Write a phony target for the top-level directory of a create_bundle target.

tools/gn/bundle_data.h

 // Copyright 2016 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.
 
 #ifndef TOOLS_GN_BUNDLE_DATA_H_
 #define TOOLS_GN_BUNDLE_DATA_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 46 matching lines @@
 
   // Returns the list of outputs as SourceFile.
   void GetOutputsAsSourceFiles(
       const Settings* settings,
       SourceFiles* outputs_as_source) const;
 
   // Returns the path to the compiled asset catalog. Only valid if
   // asset_catalog_sources() is not empty.
   SourceFile GetCompiledAssetCatalogPath() const;
 
+  // Returns the path to the top-level directory of the bundle. This is
+  // based on root_dir(), but since that can be Bundle.app/Contents/ or
+  // any other subpath, this is just the most top-level directory (e.g.,
+  // just Bundle.app/).
+  SourceFile GetBundleRootDirOutput(const Settings* settings) const;

[brettw, 2016/04/18 20:16:14]

Can this return a SourceDir instead? The thing you're returning is really a
directory so I think we should be semantically correct here (will need to ensure
it ends in a slash before you construct it).

[Robert Sesek, 2016/04/19 15:37:51]

Is it acceptable to convert a SourceDir to an OutputFile? There isn't a direct
ctor for that so it would have to be indirected through .value() conversion.

Conceptually this may actually be a SourceFile, though. This CL basically
treating the output of a create_bundle as a single unit (a "source file") so
that it can be used as a source elsewhere.

[brettw, 2016/04/21 19:14:00]

I can kind of see that. Can the comment above the function explain what you just
wrote here about why it's a SourceFile?

[Robert Sesek, 2016/04/21 21:03:20]

Done.

+
   // Returns the list of inputs for the compilation of the asset catalog.
   SourceFiles& asset_catalog_sources() { return asset_catalog_sources_; }
   const SourceFiles& asset_catalog_sources() const {
     return asset_catalog_sources_;
   }
 
   BundleFileRules& file_rules() { return file_rules_; }
   const BundleFileRules& file_rules() const { return file_rules_; }
 
   std::string& root_dir() { return root_dir_; }
@@ skipping 18 matching lines @@
 
   // All those values are subdirectories relative to root_build_dir, and apart
   // from root_dir, they are either equal to root_dir_ or subdirectories of it.
   std::string root_dir_;
   std::string resources_dir_;
   std::string executable_dir_;
   std::string plugins_dir_;
 };
 
 #endif  // TOOLS_GN_BUNDLE_DATA_H_