Support script response files in GN.

tools/gn/substitution_type.cc

 // Copyright 2014 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/substitution_type.h"
 
 #include <stdlib.h>
 
 #include "tools/gn/err.h"
 
@@ skipping 25 matching lines @@
   "{{cflags_objcc}}",  // SUBSTITUTION_CFLAGS_OBJCC
   "{{defines}}",  // SUBSTITUTION_DEFINES
   "{{include_dirs}}",  // SUBSTITUTION_INCLUDE_DIRS
 
   "{{inputs}}",  // SUBSTITUTION_LINKER_INPUTS
   "{{inputs_newline}}",  // SUBSTITUTION_LINKER_INPUTS_NEWLINE
   "{{ldflags}}",  // SUBSTITUTION_LDFLAGS
   "{{libs}}",  // SUBSTITUTION_LIBS
   "{{output_extension}}",  // SUBSTITUTION_OUTPUT_EXTENSION
   "{{solibs}}",  // SUBSTITUTION_SOLIBS
+
+  "{{response_file_name}}",  // SUBSTITUTION_RSP_FILE_NAME
 };
 
 const char* kSubstitutionNinjaNames[SUBSTITUTION_NUM_TYPES] = {
     nullptr,  // SUBSTITUTION_LITERAL
 
     "in",   // SUBSTITUTION_SOURCE
     "out",  // SUBSTITUTION_OUTPUT
 
     "source_name_part",          // SUBSTITUTION_NAME_PART
     "source_file_part",          // SUBSTITUTION_FILE_PART
@@ skipping 20 matching lines @@
 
     // LINKER_INPUTS expands to the same Ninja var as SUBSTITUTION_SOURCE. These
     // are used in different contexts and are named differently to keep things
     // clear, but they both expand to the "set of input files" for a build rule.
     "in",                // SUBSTITUTION_LINKER_INPUTS
     "in_newline",        // SUBSTITUTION_LINKER_INPUTS_NEWLINE
     "ldflags",           // SUBSTITUTION_LDFLAGS
     "libs",              // SUBSTITUTION_LIBS
     "output_extension",  // SUBSTITUTION_OUTPUT_EXTENSION
     "solibs",            // SUBSTITUTION_SOLIBS
+
+    "rspfile",  // SUBSTITUTION_RSP_FILE_NAME
 };
 
 SubstitutionBits::SubstitutionBits() : used() {
 }
 
 void SubstitutionBits::MergeFrom(const SubstitutionBits& other) {
   for (size_t i = 0; i < SUBSTITUTION_NUM_TYPES; i++)
     used[i] |= other.used[i];
 }
 
@@ skipping 84 matching lines @@
     if (!IsValidSourceSubstitution(types[i])) {
       *err = Err(origin, "Invalid substitution type.",
           "The substitution " + std::string(kSubstitutionNames[i]) +
           " isn't valid for something\n"
           "operating on a source file such as this.");
       return false;
     }
   }
   return true;
 }