Implement tracking of BUILD.gn files used to define target, toolchain or

tools/gn/functions.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/functions.h"
 
 #include <stddef.h>
 #include <iostream>
 #include <utility>
 
@@ skipping 319 matching lines @@
   if (!EnsureSingleStringArg(function, args, err) ||
       !EnsureNotProcessingImport(function, scope, err))
     return Value();
 
   Label label(MakeLabelForScope(scope, function, args[0].string_value()));
 
   if (g_scheduler->verbose_logging())
     g_scheduler->Log("Defining config", label.GetUserVisibleName(true));
 
   // Create the new config.
-  std::unique_ptr<Config> config(new Config(scope->settings(), label));
+  std::unique_ptr<Config> config(
+      new Config(scope->settings(), label, scope->input_files()));
   config->set_defined_from(function);
   if (!Visibility::FillItemVisibility(config.get(), scope, err))
     return Value();
 
   // Fill the flags and such.
   const SourceDir& input_dir = scope->GetSourceDir();
   ConfigValuesGenerator gen(&config->own_values(), scope, input_dir, err);
   gen.Run();
   if (err->has_error())
     return Value();
@@ skipping 434 matching lines @@
 
   if (!depth->VerifyTypeIs(Value::INTEGER, err))
     return Value();
 
   if (depth->int_value() < 0) {
     *err = Err(function, "depth must be positive or nul.");
     return Value();
   }
 
   // Create the new pool.
-  std::unique_ptr<Pool> pool(new Pool(scope->settings(), label));
+  std::unique_ptr<Pool> pool(
+      new Pool(scope->settings(), label, scope->input_files()));
   pool->set_depth(depth->int_value());
 
   // Save the generated item.
   Scope::ItemVector* collector = scope->GetItemCollector();
   if (!collector) {
     *err = Err(function, "Can't define a pool in this context.");
     return Value();
   }
   collector->push_back(pool.release());
 
@@ skipping 331 matching lines @@
   }
 
   // Otherwise it's a no-block function.
   if (!VerifyNoBlockForFunctionCall(function, block, err))
     return Value();
   return found_function->second.no_block_runner(scope, function,
                                                 args.list_value(), err);
 }
 
 }  // namespace functions