Simplify About Chrome settings page.
[chromium-blink-merge.git] / chrome / app_shim / app_mode_loader_mac.mm
blob16e7f7ec6228783d5d073fe96f566c6d39f2db07
1 // Copyright (c) 2012 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.
5 // On Mac, shortcuts can't have command-line arguments. Instead, produce small
6 // app bundles which locate the Chromium framework and load it, passing the
7 // appropriate data. This is the code for such an app bundle. It should be kept
8 // minimal and do as little work as possible (with as much work done on
9 // framework side as possible).
11 #include <dlfcn.h>
13 #import <Cocoa/Cocoa.h>
15 #include "base/command_line.h"
16 #include "base/files/file_path.h"
17 #include "base/files/file_util.h"
18 #include "base/logging.h"
19 #include "base/mac/foundation_util.h"
20 #include "base/mac/launch_services_util.h"
21 #include "base/mac/scoped_nsautorelease_pool.h"
22 #include "base/process/launch.h"
23 #include "base/strings/string_number_conversions.h"
24 #include "base/strings/sys_string_conversions.h"
25 #include "chrome/common/chrome_constants.h"
26 #include "chrome/common/chrome_switches.h"
27 #import "chrome/common/mac/app_mode_chrome_locator.h"
28 #include "chrome/common/mac/app_mode_common.h"
30 namespace {
32 typedef int (*StartFun)(const app_mode::ChromeAppModeInfo*);
34 int LoadFrameworkAndStart(app_mode::ChromeAppModeInfo* info) {
35   using base::SysNSStringToUTF8;
36   using base::SysNSStringToUTF16;
37   using base::mac::CFToNSCast;
38   using base::mac::CFCastStrict;
39   using base::mac::NSToCFCast;
41   base::mac::ScopedNSAutoreleasePool scoped_pool;
43   // Get the current main bundle, i.e., that of the app loader that's running.
44   NSBundle* app_bundle = [NSBundle mainBundle];
45   CHECK(app_bundle) << "couldn't get loader bundle";
47   // ** 1: Get path to outer Chrome bundle.
48   // Get the bundle ID of the browser that created this app bundle.
49   NSString* cr_bundle_id = base::mac::ObjCCast<NSString>(
50       [app_bundle objectForInfoDictionaryKey:app_mode::kBrowserBundleIDKey]);
51   CHECK(cr_bundle_id) << "couldn't get browser bundle ID";
53   // First check if Chrome exists at the last known location.
54   base::FilePath cr_bundle_path;
55   NSString* cr_bundle_path_ns =
56       [CFToNSCast(CFCastStrict<CFStringRef>(CFPreferencesCopyAppValue(
57           NSToCFCast(app_mode::kLastRunAppBundlePathPrefsKey),
58           NSToCFCast(cr_bundle_id)))) autorelease];
59   cr_bundle_path = base::mac::NSStringToFilePath(cr_bundle_path_ns);
60   bool found_bundle =
61       !cr_bundle_path.empty() && base::DirectoryExists(cr_bundle_path);
63   if (!found_bundle) {
64     // If no such bundle path exists, try to search by bundle ID.
65     if (!app_mode::FindBundleById(cr_bundle_id, &cr_bundle_path)) {
66       // TODO(jeremy): Display UI to allow user to manually locate the Chrome
67       // bundle.
68       LOG(FATAL) << "Failed to locate bundle by identifier";
69     }
70   }
72   // ** 2: Read the running Chrome version.
73   // The user_data_dir for shims actually contains the app_data_path.
74   // I.e. <user_data_dir>/<profile_dir>/Web Applications/_crx_extensionid/
75   base::FilePath app_data_dir = base::mac::NSStringToFilePath([app_bundle
76       objectForInfoDictionaryKey:app_mode::kCrAppModeUserDataDirKey]);
77   base::FilePath user_data_dir = app_data_dir.DirName().DirName().DirName();
78   CHECK(!user_data_dir.empty());
80   // If the version file does not exist, |cr_version_str| will be empty and
81   // app_mode::GetChromeBundleInfo will default to the latest version.
82   base::FilePath cr_version_str;
83   base::ReadSymbolicLink(
84       user_data_dir.Append(app_mode::kRunningChromeVersionSymlinkName),
85       &cr_version_str);
87   // If the version file does exist, it may have been left by a crashed Chrome
88   // process. Ensure the process is still running.
89   if (!cr_version_str.empty()) {
90     NSArray* existing_chrome = [NSRunningApplication
91         runningApplicationsWithBundleIdentifier:cr_bundle_id];
92     if ([existing_chrome count] == 0)
93       cr_version_str.clear();
94   }
96   // ** 3: Read information from the Chrome bundle.
97   base::FilePath executable_path;
98   base::FilePath version_path;
99   base::FilePath framework_shlib_path;
100   if (!app_mode::GetChromeBundleInfo(cr_bundle_path,
101                                      cr_version_str.value(),
102                                      &executable_path,
103                                      &version_path,
104                                      &framework_shlib_path)) {
105     LOG(FATAL) << "Couldn't ready Chrome bundle info";
106   }
107   base::FilePath app_mode_bundle_path =
108       base::mac::NSStringToFilePath([app_bundle bundlePath]);
110   // ** 4: Fill in ChromeAppModeInfo.
111   info->chrome_outer_bundle_path = cr_bundle_path;
112   info->chrome_versioned_path = version_path;
113   info->app_mode_bundle_path = app_mode_bundle_path;
115   // Read information about the this app shortcut from the Info.plist.
116   // Don't check for null-ness on optional items.
117   NSDictionary* info_plist = [app_bundle infoDictionary];
118   CHECK(info_plist) << "couldn't get loader Info.plist";
120   info->app_mode_id = SysNSStringToUTF8(
121       [info_plist objectForKey:app_mode::kCrAppModeShortcutIDKey]);
122   CHECK(info->app_mode_id.size()) << "couldn't get app shortcut ID";
124   info->app_mode_name = SysNSStringToUTF16(
125       [info_plist objectForKey:app_mode::kCrAppModeShortcutNameKey]);
127   info->app_mode_url = SysNSStringToUTF8(
128       [info_plist objectForKey:app_mode::kCrAppModeShortcutURLKey]);
130   info->user_data_dir = base::mac::NSStringToFilePath(
131       [info_plist objectForKey:app_mode::kCrAppModeUserDataDirKey]);
133   info->profile_dir = base::mac::NSStringToFilePath(
134       [info_plist objectForKey:app_mode::kCrAppModeProfileDirKey]);
136   // ** 5: Open the framework.
137   StartFun ChromeAppModeStart = NULL;
138   void* cr_dylib = dlopen(framework_shlib_path.value().c_str(), RTLD_LAZY);
139   if (cr_dylib) {
140     // Find the entry point.
141     ChromeAppModeStart = (StartFun)dlsym(cr_dylib, "ChromeAppModeStart");
142     if (!ChromeAppModeStart)
143       LOG(ERROR) << "Couldn't get entry point: " << dlerror();
144   } else {
145     LOG(ERROR) << "Couldn't load framework: " << dlerror();
146   }
148   if (ChromeAppModeStart)
149     return ChromeAppModeStart(info);
151   LOG(ERROR) << "Loading Chrome failed, launching Chrome with command line";
152   base::CommandLine command_line(executable_path);
153   // The user_data_dir from the plist is actually the app data dir.
154   command_line.AppendSwitchPath(
155       switches::kUserDataDir,
156       info->user_data_dir.DirName().DirName().DirName());
157   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
158           app_mode::kLaunchedByChromeProcessId) ||
159       info->app_mode_id == app_mode::kAppListModeId) {
160     // Pass --app-shim-error to have Chrome rebuild this shim.
161     // If Chrome has rebuilt this shim once already, then rebuilding doesn't fix
162     // the problem, so don't try again.
163     if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
164             app_mode::kLaunchedAfterRebuild)) {
165       command_line.AppendSwitchPath(app_mode::kAppShimError,
166                                     app_mode_bundle_path);
167     }
168   } else {
169     // If the shim was launched directly (instead of by Chrome), first ask
170     // Chrome to launch the app. Chrome will launch the shim again, the same
171     // error will occur and be handled above. This approach allows the app to be
172     // started without blocking on fixing the shim and guarantees that the
173     // profile is loaded when Chrome receives --app-shim-error.
174     command_line.AppendSwitchPath(switches::kProfileDirectory,
175                                   info->profile_dir);
176     command_line.AppendSwitchASCII(switches::kAppId, info->app_mode_id);
177   }
178   // Launch the executable directly since base::mac::OpenApplicationWithPath
179   // uses LSOpenApplication which doesn't pass command line arguments if the
180   // application is already running.
181   if (!base::LaunchProcess(command_line, base::LaunchOptions()).IsValid()) {
182     LOG(ERROR) << "Could not launch Chrome: "
183                << command_line.GetCommandLineString();
184     return 1;
185   }
187   return 0;
190 } // namespace
192 __attribute__((visibility("default")))
193 int main(int argc, char** argv) {
194   base::CommandLine::Init(argc, argv);
195   app_mode::ChromeAppModeInfo info;
197   // Hard coded info parameters.
198   info.major_version = app_mode::kCurrentChromeAppModeInfoMajorVersion;
199   info.minor_version = app_mode::kCurrentChromeAppModeInfoMinorVersion;
200   info.argc = argc;
201   info.argv = argv;
203   // Exit instead of returning to avoid the the removal of |main()| from stack
204   // backtraces under tail call optimization.
205   exit(LoadFrameworkAndStart(&info));