GN: Add depfile for java_cpp_enum

build/config/android/rules.gni

 # 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.
 
 import("//base/android/linker/config.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//build/toolchain/toolchain.gni")
 import("//third_party/android_platform/config.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 330 matching lines @@
 
     assert(defined(invoker.sources))
     forward_variables_from(invoker,
                            [
                              "sources",
                              "testonly",
                              "visibility",
                            ])
 
     script = "//build/android/gyp/java_cpp_enum.py"
+    depfile = "$target_gen_dir/$target_name.d"

[pkotwicz, 2015/11/18 23:16:24]

Nit: Shouldn't |depfile| be |_depfile| ?

[pkotwicz, 2015/11/18 23:17:50]

Never mind, depfile is a parameter of action

 
     _srcjar_path = "${target_gen_dir}/${target_name}.srcjar"
     _rebased_srcjar_path = rebase_path(_srcjar_path, root_build_dir)
     _rebased_sources = rebase_path(invoker.sources, root_build_dir)
 
-    args = [ "--srcjar=$_rebased_srcjar_path" ] + _rebased_sources
+    args = [
+             "--depfile",
+             rebase_path(depfile, root_build_dir),
+             "--srcjar=$_rebased_srcjar_path",
+           ] + _rebased_sources
     outputs = [
+      depfile,
       _srcjar_path,
     ]
   }
 }
 
 # Declare a target for processing a Jinja template.
 #
 # Variables
 #   input: The template file to be processed.
 #   output: Where to save the result.
@@ skipping 1782 matching lines @@
   }
 
   android_library(target_name) {
     java_files = []
     srcjar_deps = [ ":${_template_name}__protoc_java" ]
     deps = [
       "//third_party/android_protobuf:protobuf_nano_javalib",
     ]
   }
 }