components/component_updater/component_updater_paths.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/component_updater/component_updater_paths.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/path_service.h"
   9
  10 namespace component_updater {
  11
  12 namespace {
  13
  14 // This key gives the root directory of all the component installations.
  15 static int g_components_root_key = -1;
  16
  17 }  // namespace
  18
  19 bool PathProvider(int key, base::FilePath* result) {
  20   DCHECK_GT(g_components_root_key, 0);
  21
  22   // Early exit here to prevent a potential infinite loop when we retrieve
  23   // the path for g_components_root_key.
  24   if (key < PATH_START || key > PATH_END)
  25     return false;
  26
  27   base::FilePath cur;
  28   if (!PathService::Get(g_components_root_key, &cur))
  29     return false;
  30
  31   switch (key) {
  32     case DIR_COMPONENT_CLD2:
  33       cur = cur.Append(FILE_PATH_LITERAL("CLD"));
  34       break;
  35     case DIR_RECOVERY_BASE:
  36       cur = cur.Append(FILE_PATH_LITERAL("recovery"));
  37       break;
  38     case DIR_SWIFT_SHADER:
  39       cur = cur.Append(FILE_PATH_LITERAL("SwiftShader"));
  40       break;
  41     case DIR_SW_REPORTER:
  42       cur = cur.Append(FILE_PATH_LITERAL("SwReporter"));
  43       break;
  44     case DIR_COMPONENT_EV_WHITELIST:
  45       cur = cur.Append(FILE_PATH_LITERAL("EVWhitelist"));
  46       break;
  47     default:
  48       return false;
  49   }
  50
  51   *result = cur;
  52   return true;
  53 }
  54
  55 // This cannot be done as a static initializer sadly since Visual Studio will
  56 // eliminate this object file if there is no direct entry point into it.
  57 void RegisterPathProvider(int components_root_key) {
  58   DCHECK_EQ(g_components_root_key, -1);
  59   DCHECK_GT(components_root_key, 0);
  60   DCHECK(components_root_key < PATH_START || components_root_key > PATH_END);
  61
  62   g_components_root_key = components_root_key;
  63   PathService::RegisterProvider(PathProvider, PATH_START, PATH_END);
  64 }
  65
  66 }  // namespace component_updater