Copy setup when quick-enabling app host to user-level from system-level.

chrome/installer/setup/uninstall.cc

 // Copyright (c) 2012 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.
 //
 // This file defines the methods useful for uninstalling Chrome.
 
 #include "chrome/installer/setup/uninstall.h"
 
 #include <windows.h>
 
@@ skipping 163 matching lines @@
 
   // If chrome has been reactivated, clear all events for this brand as well.
   string16 reactivation_brand_wide;
   if (GoogleUpdateSettings::GetReactivationBrand(&reactivation_brand_wide)) {
     std::string reactivation_brand(WideToASCII(reactivation_brand_wide));
     rlz_lib::SupplementaryBranding branding(reactivation_brand.c_str());
     rlz_lib::ClearProductState(rlz_lib::CHROME, points);
   }
 }
 
+// Decides whether setup.exe and the installer archive should be removed based
+// on the original and installer states:
+// * non-multi product being uninstalled: remove both
+// * any multi product left besides App Host: keep both
+// * only App Host left: keep setup.exe
+void CheckShouldRemoveSetupAndArchive(
+    const installer::InstallationState& original_state,
+    const installer::InstallerState& installer_state,
+    bool* remove_setup,
+    bool* remove_archive) {
+  *remove_setup = true;
+  *remove_archive = true;
+
+  // If any multi-install product is left (other than App Host) we must leave
+  // the installer and archive. For the App Host, we only leave the installer.
+  if (!installer_state.is_multi_install()) {
+    VLOG(1) << "Removing all installer files for a non-multi installation.";
+  } else {
+    for (size_t i = 0; i < BrowserDistribution::NUM_TYPES; ++i) {
+      BrowserDistribution::Type dist_type =
+          static_cast<BrowserDistribution::Type>(i);
+      const installer::ProductState* product_state =
+          original_state.GetProductState(
+              installer_state.system_install(), dist_type);
+      if (product_state && product_state->is_multi_install() &&
+          !installer_state.FindProduct(dist_type)) {
+        *remove_setup = false;
+        if (dist_type != BrowserDistribution::CHROME_APP_HOST) {
+          VLOG(1) << "Keeping all installer files due to a remaining "
+                  << "multi-install product.";
+          *remove_archive = false;
+          return;
+        }
+        VLOG(1) << "Keeping setup.exe due to a remaining "
+                << "app-host installation.";
+      }
+    }
+    VLOG(1) << "Removing the installer archive.";
+    if (remove_setup)
+      VLOG(1) << "Removing setup.exe.";
+  }
+}
+
+// Removes all files from the installer directory, leaving setup.exe iff
+// |remove_setup| is false.
+// Returns false in case of an error.
+bool RemoveInstallerFiles(const FilePath& install_directory,
+                          bool remove_setup) {
+  using file_util::FileEnumerator;
+  FileEnumerator file_enumerator(
+      install_directory,
+      false,
+      FileEnumerator::FILES | FileEnumerator::DIRECTORIES);
+  bool success = true;
+
+  while (true) {
+    FilePath to_delete(file_enumerator.Next());
+    if (to_delete.empty())
+      break;
+    if (!remove_setup && to_delete.BaseName() == FilePath(installer::kSetupExe))

[grt (UTC plus 2), 2012/11/23 21:00:55]

nit: create this FilePath instance out of the loop

[erikwright (departed), 2012/11/29 07:40:36]

Done.

+      continue;
+
+    VLOG(1) << "Deleting install path " << to_delete.value();
+    if (!file_util::Delete(to_delete, true)) {
+      LOG(ERROR) << "Failed to delete path: " << to_delete.value();
+      success = false;
+    }
+  }
+
+  return success;
+}
+
 }  // namespace
 
 namespace installer {
 
 // This functions checks for any Chrome instances that are
 // running and first asks them to close politely by sending a Windows message.
 // If there is an error while sending message or if there are still Chrome
 // procesess active after the message has been sent, this function will try
 // to kill them.
 void CloseAllChromeProcesses() {
@@ skipping 209 matching lines @@
       const FilePath product_dir(user_data_dir.DirName());
       if (!product_dir.empty())
         DeleteEmptyDir(product_dir);
     }
   }
 
   return result;
 }
 
 bool MoveSetupOutOfInstallFolder(const InstallerState& installer_state,
-                                 const FilePath& setup_path,
-                                 const Version& installed_version) {
+                                 const FilePath& setup_exe) {
   bool ret = false;
-  FilePath setup_exe(installer_state.GetInstallerDirectory(installed_version)
-      .Append(setup_path.BaseName()));
   FilePath temp_file;
   if (!file_util::CreateTemporaryFile(&temp_file)) {
     LOG(ERROR) << "Failed to create temporary file for setup.exe.";
   } else {
     VLOG(1) << "Attempting to move setup to: " << temp_file.value();
     ret = file_util::Move(setup_exe, temp_file);
     PLOG_IF(ERROR, !ret) << "Failed to move setup to " << temp_file.value();
 
     // We cannot delete the file right away, but try to delete it some other
     // way. Either with the help of a different process or the system.
@@ skipping 36 matching lines @@
   }
 
   DeleteInstallTempDir(target_path);
 
   DeleteResult result = DELETE_SUCCEEDED;
 
   FilePath app_host_exe(target_path.Append(installer::kChromeAppHostExe));
   if (!file_util::Delete(app_host_exe, false)) {
     result = DELETE_FAILED;
     LOG(ERROR) << "Failed to delete path: " << app_host_exe.value();
-  } else {
-    result = DeleteApplicationProductAndVendorDirectories(target_path);
   }
 
   return result;
 }
 
 DeleteResult DeleteChromeFilesAndFolders(const InstallerState& installer_state,
-                                         const Version& installed_version) {
+                                         const FilePath& installer_path) {
   const FilePath& target_path = installer_state.target_path();
   if (target_path.empty()) {
     LOG(ERROR) << "DeleteChromeFilesAndFolders: no installation destination "
                << "path.";
     return DELETE_FAILED;  // Nothing else we can do to uninstall, so we return.
   }
 
   DeleteInstallTempDir(target_path);
 
   DeleteResult result = DELETE_SUCCEEDED;
 
+  FilePath installer_directory;
+  if (target_path.IsParent(installer_path))
+    installer_directory = installer_path.DirName();
+
+  // Enumerate all the files in target_path recursively (breadth-first).
+  // We delete a file or folder unless it is a parent/child of the installer
+  // directory. For parents of the installer directory, we will later recurse
+  // and delete all the children (that are not also parents/children of the
+  // installer directory).
   using file_util::FileEnumerator;
-  FileEnumerator file_enumerator(target_path, false,
-      FileEnumerator::FILES | FileEnumerator::DIRECTORIES);
+  FileEnumerator file_enumerator(
+      target_path, true, FileEnumerator::FILES | FileEnumerator::DIRECTORIES);
   while (true) {
     FilePath to_delete(file_enumerator.Next());
     if (to_delete.empty())
       break;
     if (to_delete.BaseName().value() == installer::kChromeAppHostExe)
       continue;
+    if (!installer_directory.empty() &&
+        (to_delete == installer_directory ||
+         installer_directory.IsParent(to_delete) ||
+         to_delete.IsParent(installer_directory))) {
+      continue;
+    }
 
     VLOG(1) << "Deleting install path " << to_delete.value();
     if (!file_util::Delete(to_delete, true)) {
       LOG(ERROR) << "Failed to delete path (1st try): " << to_delete.value();
       if (installer_state.FindProduct(BrowserDistribution::CHROME_FRAME)) {
         // We don't try killing Chrome processes for Chrome Frame builds since
         // that is unlikely to help. Instead, schedule files for deletion and
         // return a value that will trigger a reboot prompt.
         FileEnumerator::FindInfo find_info;
         file_enumerator.GetFindInfo(&find_info);
         if (FileEnumerator::IsDirectory(find_info))
           ScheduleDirectoryForDeletion(to_delete.value().c_str());
         else
           ScheduleFileSystemEntityForDeletion(to_delete.value().c_str());
         result = DELETE_REQUIRES_REBOOT;
       } else {
         // Try closing any running Chrome processes and deleting files once
         // again.
         CloseAllChromeProcesses();
         if (!file_util::Delete(to_delete, true)) {
           LOG(ERROR) << "Failed to delete path (2nd try): "
                      << to_delete.value();
           result = DELETE_FAILED;
           break;
         }
       }
     }
   }
 
-  if (result == DELETE_REQUIRES_REBOOT) {
-    // Delete the Application directory at reboot if empty.
-    ScheduleFileSystemEntityForDeletion(target_path.value().c_str());
-
-    // If we need a reboot to continue, schedule the parent directories for
-    // deletion unconditionally. If they are not empty, the session manager
-    // will not delete them on reboot.
-    ScheduleParentAndGrandparentForDeletion(target_path);
-  } else {
-    result = DeleteApplicationProductAndVendorDirectories(target_path);
-  }
   return result;
 }
 
 // This method checks if Chrome is currently running or if the user has
 // cancelled the uninstall operation by clicking Cancel on the confirmation
 // box that Chrome pops up.
 InstallStatus IsChromeActiveOrUserCancelled(
     const InstallerState& installer_state,
     const Product& product) {
   int32 exit_code = content::RESULT_CODE_NORMAL_EXIT;
@@ skipping 674 matching lines @@
                                             product);
   ret = installer::UNINSTALL_SUCCESSFUL;
 
   // When deleting files, we must make sure that we're either a "single"
   // (aka non-multi) installation or we are the Chrome Binaries.
 
   std::vector<FilePath> local_state_folders;
   GetLocalStateFolders(product, &local_state_folders);
   FilePath backup_state_file(BackupLocalStateFile(local_state_folders));
 
-  DeleteResult delete_result = DELETE_SUCCEEDED;
-
   if (product.is_chrome_app_host()) {
     DeleteAppHostFilesAndFolders(installer_state, product_state->version());
   } else if (!installer_state.is_multi_install() ||
              product.is_chrome_binaries()) {
-
-    // In order to be able to remove the folder in which we're running, we
-    // need to move setup.exe out of the install folder.
-    // TODO(tommi): What if the temp folder is on a different volume?
-    MoveSetupOutOfInstallFolder(installer_state, setup_path,
-                                product_state->version());
-    delete_result = DeleteChromeFilesAndFolders(installer_state,
-                                                product_state->version());
+    DeleteResult delete_result = DeleteChromeFilesAndFolders(
+        installer_state, cmd_line.GetProgram());
+    if (delete_result == DELETE_FAILED) {
+      ret = installer::UNINSTALL_FAILED;
+    } else if (delete_result == DELETE_REQUIRES_REBOOT) {
+      ret = installer::UNINSTALL_REQUIRES_REBOOT;
+    }
   }
 
   if (delete_profile)
     DeleteLocalState(local_state_folders, product.is_chrome_frame());
 
-  if (delete_result == DELETE_FAILED) {
-    ret = installer::UNINSTALL_FAILED;
-  } else if (delete_result == DELETE_REQUIRES_REBOOT) {
-    ret = installer::UNINSTALL_REQUIRES_REBOOT;
-  }
-
   if (!force_uninstall) {
     VLOG(1) << "Uninstallation complete. Launching post-uninstall operations.";
     browser_dist->DoPostUninstallOperations(product_state->version(),
         backup_state_file, distribution_data);
   }
 
   // Try and delete the preserved local state once the post-install
   // operations are complete.
   if (!backup_state_file.empty())
     file_util::Delete(backup_state_file, false);
 
   return ret;
 }
 
+void CleanUpInstallationDirectoryAfterUninstall(
+    const InstallationState& original_state,
+    const InstallerState& installer_state,
+    const CommandLine& cmd_line,
+    installer::InstallStatus* uninstall_status) {
+  if (*uninstall_status != installer::UNINSTALL_SUCCESSFUL &&
+      *uninstall_status != installer::UNINSTALL_REQUIRES_REBOOT) {
+    return;
+  }
+  const FilePath target_path(installer_state.target_path());
+  if (target_path.empty()) {
+    LOG(ERROR) << "No installation destination path.";
+    *uninstall_status = installer::UNINSTALL_FAILED;
+    return;
+  }
+  const FilePath setup_exe = cmd_line.GetProgram();

[grt (UTC plus 2), 2012/11/23 21:00:55]

wdyt about using file_util::AbsolutePath here in case the full path wasn't used?
setup.exe could have been run via the command-line with a relative path.

[erikwright (departed), 2012/11/29 07:40:36]

From my reading of GetCommandLine (which is what
CommandLine::ForCurrentProcess()->GetProgram() is ultimately based on) the OS
will fully-qualify the path:

http://msdn.microsoft.com/en-us/library/windows/desktop/ms683156(v=vs.85).aspx

But technically, it says "may", and I suppose AbsolutePath doesn't hurt in
either case.

[grt (UTC plus 2), 2012/11/30 13:40:30]

I believe gab@ has run into cases where it isn't fully qualified (when he added
the developer install switch to setup.exe), so I think this is a teensy bit more
safe.

[gab, 2012/11/30 15:19:45]

Right, I think it's the path setup.exe was invoked with (i.e., if invoked
directly from its directory as "setup.exe --foo --bar" then
CommandLine.GetProgram() only returns "setup.exe", not the absolute path).

+  if (!target_path.IsParent(setup_exe)) {
+    LOG(INFO) << "setup.exe is not in target path. Skipping installer cleanup.";
+    return;
+  }
+  FilePath install_directory(setup_exe.DirName());
+
+  bool remove_setup = true;
+  bool remove_archive = true;
+  CheckShouldRemoveSetupAndArchive(original_state, installer_state,
+                                   &remove_setup, &remove_archive);
+  if (!remove_archive)
+    return;
+
+  if (remove_setup) {
+    // In order to be able to remove the folder in which we're running, we
+    // need to move setup.exe out of the install folder.
+    // TODO(tommi): What if the temp folder is on a different volume?
+    MoveSetupOutOfInstallFolder(installer_state, setup_exe);
+  }
+

[grt (UTC plus 2), 2012/11/23 21:00:55]

// Remove files from "...\<product>\Application\<version>\Installer"

[erikwright (departed), 2012/11/29 07:40:36]

Done.

+  if (!RemoveInstallerFiles(install_directory, remove_setup)) {
+    *uninstall_status = installer::UNINSTALL_FAILED;
+    return;
+  }
+
+  if (!remove_setup)
+    return;
+
+  // Try to remove the empty directory hierarchy.
+

[grt (UTC plus 2), 2012/11/23 21:00:55]

// Delete "...\<product>\Application\<version>\Installer"

[erikwright (departed), 2012/11/29 07:40:36]

Done.

+  if (DeleteEmptyDir(install_directory) != DELETE_SUCCEEDED) {
+    *uninstall_status = installer::UNINSTALL_FAILED;
+    return;
+  }
+

[grt (UTC plus 2), 2012/11/23 21:00:55]

// Delete "...\<product>\Application\<version>"

[erikwright (departed), 2012/11/29 07:40:36]

Done.

+  FilePath to_delete = install_directory.DirName();
+  while (to_delete != target_path) {

[grt (UTC plus 2), 2012/11/23 21:00:55]

isn't the loop overkill?  it looks like the version dir is the one and only dir
that this loop processes.

[erikwright (departed), 2012/11/29 07:40:36]

I guess I was trying not to code that dependency in here. Nothing else in this
function would break if that hierarchy were suddenly deeper. But, then again,
the world would break if `dirname $SETUP_EXE`/../../chrome.exe didn't work
anymore.

+    DeleteResult delete_result = DeleteEmptyDir(to_delete);
+    if (delete_result == DELETE_SUCCEEDED) {
+      to_delete = to_delete.DirName();
+      continue;
+    }
+    if (delete_result == DELETE_NOT_EMPTY &&
+        *uninstall_status == installer::UNINSTALL_REQUIRES_REBOOT) {
+      break;
+    }
+    *uninstall_status = installer::UNINSTALL_FAILED;
+    return;
+  }
+
+  if (*uninstall_status == installer::UNINSTALL_REQUIRES_REBOOT) {
+    // Delete the Application directory at reboot if empty.
+    ScheduleFileSystemEntityForDeletion(target_path.value().c_str());
+
+    // If we need a reboot to continue, schedule the parent directories for
+    // deletion unconditionally. If they are not empty, the session manager
+    // will not delete them on reboot.
+    ScheduleParentAndGrandparentForDeletion(target_path);
+  } else if (DeleteApplicationProductAndVendorDirectories(target_path) ==
+             installer::DELETE_FAILED) {
+    *uninstall_status = installer::UNINSTALL_FAILED;
+  }
+}
+
 }  // namespace installer