Support deps for actions in GN.

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 66 matching lines @@
     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::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;
 
-  if (target_->source_prereqs().empty() &&
+  if (extra_hard_deps.empty() &&
+      target_->source_prereqs().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.
@@ skipping 23 matching lines @@
   }
 
   // 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(output_template_args);
 }