skia_commit_hash.h

skia/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
@@ skipping 278 matching lines @@
       "/wd4390",  # ';'empty statement found in looping;is it what was intended?
       "/wd4554",  # 'operator' : check operator precedence for possible error
       "/wd4748",  # compiler will disable optimizations if a function has inline
                   # assembly code contains flow control(jmp or jcc) statements.
 
       "/wd4800",  # forcing value to bool 'true/false'(assigning int to bool).
     ]
   }
 }
 
+action("generate_commit_hash") {

[mtklein_C, 2016/07/29 15:46:30]

How does chrome://version/ do this, and why do we not do the same?

+  script = "commit_hash.py"
+  output_file_path = "$target_gen_dir/skia_commit_hash.cpp"
+  outputs = [
+    output_file_path,
+  ]
+  args = [
+    rebase_path("//third_party/skia", root_build_dir),
+    rebase_path(output_file_path, root_build_dir),
+  ]
+}
+
 component("skia") {
   sources = [
     # Chrome sources.
     "config/SkUserConfig.h",
     "config/sk_ref_cnt_ext_debug.h",
     "config/sk_ref_cnt_ext_release.h",
     "ext/SkDiscardableMemory_chrome.cc",
     "ext/SkMemory_new_handler.cpp",
     "ext/analysis_canvas.cc",
     "ext/benchmarking_canvas.cc",
@@ skipping 162 matching lines @@
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":skia_config",
     ":skia_library_config",
     "//build/config/compiler:no_chromium_code",
   ]
   public_configs = [ ":skia_config" ]
 
   deps = [
+    ":generate_commit_hash",
     ":skia_opts",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//third_party/zlib",
   ]
 
   if (is_linux) {
     if (use_pango) {
       configs += [ "//build/config/linux/pangocairo" ]
     }
@@ skipping 44 matching lines @@
     sources += [
       "//third_party/skia/src/ports/SkFontHost_mac.cpp",
       "//third_party/skia/src/utils/mac/SkCreateCGImageRef.cpp",
       "//third_party/skia/src/utils/mac/SkStream_mac.cpp",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
 
     # SkFontHost_mac.cpp uses API deprecated in iOS 7, crbug.com/408571
     cflags = [ "-Wno-deprecated-declarations" ]
   }
+  sources += get_target_outputs(":generate_commit_hash")
 }
 
 # Separated out so it can be compiled with different flags for SSE.
 if (!skia_build_no_opts) {
   if (current_cpu == "x86" || current_cpu == "x64") {
     source_set("skia_opts_sse3") {
       sources = gypi_skia_opts.ssse3_sources
       if (!is_win || is_clang) {
         cflags = [ "-mssse3" ]
       }
@@ skipping 205 matching lines @@
 
     deps = [
       ":skia",
       "//base",
       "//base/test:test_support",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
     ]
   }
 }