Cask: Use nested classes and modules.

1 files changed, 369 insertions, 369 deletions

diff --git a/Library/Homebrew/cask/lib/hbc/macos.rb b/Library/Homebrew/cask/lib/hbc/macos.rb
index 5e25c657e..fb15be108 100644
--- a/Library/Homebrew/cask/lib/hbc/macos.rb
+++ b/Library/Homebrew/cask/lib/hbc/macos.rb
@@ -2,377 +2,377 @@ require "set"
 
 require "os/mac/version"
 
-module OS::Mac
-  SYSTEM_DIRS = [
-                  "/",
-                  "/Applications",
-                  "/Applications/Utilities",
-                  "/Incompatible Software",
-                  "/Library",
-                  "/Library/Application Support",
-                  "/Library/Audio",
-                  "/Library/Caches",
-                  "/Library/ColorPickers",
-                  "/Library/ColorSync",
-                  "/Library/Components",
-                  "/Library/Compositions",
-                  "/Library/Contextual Menu Items",
-                  "/Library/CoreMediaIO",
-                  "/Library/Desktop Pictures",
-                  "/Library/Developer",
-                  "/Library/Dictionaries",
-                  "/Library/DirectoryServices",
-                  "/Library/Documentation",
-                  "/Library/Extensions",
-                  "/Library/Filesystems",
-                  "/Library/Fonts",
-                  "/Library/Frameworks",
-                  "/Library/Graphics",
-                  "/Library/Image Capture",
-                  "/Library/Input Methods",
-                  "/Library/Internet Plug-Ins",
-                  "/Library/Java",
-                  "/Library/Keyboard Layouts",
-                  "/Library/Keychains",
-                  "/Library/LaunchAgents",
-                  "/Library/LaunchDaemons",
-                  "/Library/Logs",
-                  "/Library/Messages",
-                  "/Library/Modem Scripts",
-                  "/Library/OpenDirectory",
-                  "/Library/PDF Services",
-                  "/Library/Perl",
-                  "/Library/PreferencePanes",
-                  "/Library/Preferences",
-                  "/Library/Printers",
-                  "/Library/PrivilegedHelperTools",
-                  "/Library/Python",
-                  "/Library/QuickLook",
-                  "/Library/QuickTime",
-                  "/Library/Receipts",
-                  "/Library/Ruby",
-                  "/Library/Sandbox",
-                  "/Library/Screen Savers",
-                  "/Library/ScriptingAdditions",
-                  "/Library/Scripts",
-                  "/Library/Security",
-                  "/Library/Speech",
-                  "/Library/Spelling",
-                  "/Library/Spotlight",
-                  "/Library/StartupItems",
-                  "/Library/SystemProfiler",
-                  "/Library/Updates",
-                  "/Library/User Pictures",
-                  "/Library/Video",
-                  "/Library/WebServer",
-                  "/Library/Widgets",
-                  "/Library/iTunes",
-                  "/Network",
-                  "/System",
-                  "/System/Library",
-                  "/System/Library/Accessibility",
-                  "/System/Library/Accounts",
-                  "/System/Library/Address Book Plug-Ins",
-                  "/System/Library/Assistant",
-                  "/System/Library/Automator",
-                  "/System/Library/BridgeSupport",
-                  "/System/Library/Caches",
-                  "/System/Library/ColorPickers",
-                  "/System/Library/ColorSync",
-                  "/System/Library/Colors",
-                  "/System/Library/Components",
-                  "/System/Library/Compositions",
-                  "/System/Library/CoreServices",
-                  "/System/Library/DTDs",
-                  "/System/Library/DirectoryServices",
-                  "/System/Library/Displays",
-                  "/System/Library/Extensions",
-                  "/System/Library/Filesystems",
-                  "/System/Library/Filters",
-                  "/System/Library/Fonts",
-                  "/System/Library/Frameworks",
-                  "/System/Library/Graphics",
-                  "/System/Library/IdentityServices",
-                  "/System/Library/Image Capture",
-                  "/System/Library/Input Methods",
-                  "/System/Library/InternetAccounts",
-                  "/System/Library/Java",
-                  "/System/Library/KerberosPlugins",
-                  "/System/Library/Keyboard Layouts",
-                  "/System/Library/Keychains",
-                  "/System/Library/LaunchAgents",
-                  "/System/Library/LaunchDaemons",
-                  "/System/Library/LinguisticData",
-                  "/System/Library/LocationBundles",
-                  "/System/Library/LoginPlugins",
-                  "/System/Library/Messages",
-                  "/System/Library/Metadata",
-                  "/System/Library/MonitorPanels",
-                  "/System/Library/OpenDirectory",
-                  "/System/Library/OpenSSL",
-                  "/System/Library/Password Server Filters",
-                  "/System/Library/PerformanceMetrics",
-                  "/System/Library/Perl",
-                  "/System/Library/PreferencePanes",
-                  "/System/Library/Printers",
-                  "/System/Library/PrivateFrameworks",
-                  "/System/Library/QuickLook",
-                  "/System/Library/QuickTime",
-                  "/System/Library/QuickTimeJava",
-                  "/System/Library/Recents",
-                  "/System/Library/SDKSettingsPlist",
-                  "/System/Library/Sandbox",
-                  "/System/Library/Screen Savers",
-                  "/System/Library/ScreenReader",
-                  "/System/Library/ScriptingAdditions",
-                  "/System/Library/ScriptingDefinitions",
-                  "/System/Library/Security",
-                  "/System/Library/Services",
-                  "/System/Library/Sounds",
-                  "/System/Library/Speech",
-                  "/System/Library/Spelling",
-                  "/System/Library/Spotlight",
-                  "/System/Library/StartupItems",
-                  "/System/Library/SyncServices",
-                  "/System/Library/SystemConfiguration",
-                  "/System/Library/SystemProfiler",
-                  "/System/Library/Tcl",
-                  "/System/Library/TextEncodings",
-                  "/System/Library/User Template",
-                  "/System/Library/UserEventPlugins",
-                  "/System/Library/Video",
-                  "/System/Library/WidgetResources",
-                  "/User Information",
-                  "/Users",
-                  "/Volumes",
-                  "/bin",
-                  "/boot",
-                  "/cores",
-                  "/dev",
-                  "/etc",
-                  "/etc/X11",
-                  "/etc/opt",
-                  "/etc/sgml",
-                  "/etc/xml",
-                  "/home",
-                  "/libexec",
-                  "/lost+found",
-                  "/media",
-                  "/mnt",
-                  "/net",
-                  "/opt",
-                  "/private",
-                  "/private/etc",
-                  "/private/tftpboot",
-                  "/private/tmp",
-                  "/private/var",
-                  "/proc",
-                  "/root",
-                  "/sbin",
-                  "/srv",
-                  "/tmp",
-                  "/usr",
-                  "/usr/X11R6",
-                  "/usr/bin",
-                  "/usr/etc",
-                  "/usr/include",
-                  "/usr/lib",
-                  "/usr/libexec",
-                  "/usr/local",
-                  "/usr/local/Cellar",
-                  "/usr/local/Frameworks",
-                  "/usr/local/Library",
-                  "/usr/local/bin",
-                  "/usr/local/etc",
-                  "/usr/local/include",
-                  "/usr/local/lib",
-                  "/usr/local/libexec",
-                  "/usr/local/opt",
-                  "/usr/local/share",
-                  "/usr/local/share/man",
-                  "/usr/local/share/man/man1",
-                  "/usr/local/share/man/man2",
-                  "/usr/local/share/man/man3",
-                  "/usr/local/share/man/man4",
-                  "/usr/local/share/man/man5",
-                  "/usr/local/share/man/man6",
-                  "/usr/local/share/man/man7",
-                  "/usr/local/share/man/man8",
-                  "/usr/local/share/man/man9",
-                  "/usr/local/share/man/mann",
-                  "/usr/local/var",
-                  "/usr/local/var/lib",
-                  "/usr/local/var/lock",
-                  "/usr/local/var/run",
-                  "/usr/sbin",
-                  "/usr/share",
-                  "/usr/share/man",
-                  "/usr/share/man/man1",
-                  "/usr/share/man/man2",
-                  "/usr/share/man/man3",
-                  "/usr/share/man/man4",
-                  "/usr/share/man/man5",
-                  "/usr/share/man/man6",
-                  "/usr/share/man/man7",
-                  "/usr/share/man/man8",
-                  "/usr/share/man/man9",
-                  "/usr/share/man/mann",
-                  "/usr/src",
-                  "/var",
-                  "/var/cache",
-                  "/var/lib",
-                  "/var/lock",
-                  "/var/log",
-                  "/var/mail",
-                  "/var/run",
-                  "/var/spool",
-                  "/var/spool/mail",
-                  "/var/tmp",
-                ]
-                .map(&method(:Pathname))
-                .to_set
-                .freeze
+module OS
+  module Mac
+    SYSTEM_DIRS = [
+                    "/",
+                    "/Applications",
+                    "/Applications/Utilities",
+                    "/Incompatible Software",
+                    "/Library",
+                    "/Library/Application Support",
+                    "/Library/Audio",
+                    "/Library/Caches",
+                    "/Library/ColorPickers",
+                    "/Library/ColorSync",
+                    "/Library/Components",
+                    "/Library/Compositions",
+                    "/Library/Contextual Menu Items",
+                    "/Library/CoreMediaIO",
+                    "/Library/Desktop Pictures",
+                    "/Library/Developer",
+                    "/Library/Dictionaries",
+                    "/Library/DirectoryServices",
+                    "/Library/Documentation",
+                    "/Library/Extensions",
+                    "/Library/Filesystems",
+                    "/Library/Fonts",
+                    "/Library/Frameworks",
+                    "/Library/Graphics",
+                    "/Library/Image Capture",
+                    "/Library/Input Methods",
+                    "/Library/Internet Plug-Ins",
+                    "/Library/Java",
+                    "/Library/Keyboard Layouts",
+                    "/Library/Keychains",
+                    "/Library/LaunchAgents",
+                    "/Library/LaunchDaemons",
+                    "/Library/Logs",
+                    "/Library/Messages",
+                    "/Library/Modem Scripts",
+                    "/Library/OpenDirectory",
+                    "/Library/PDF Services",
+                    "/Library/Perl",
+                    "/Library/PreferencePanes",
+                    "/Library/Preferences",
+                    "/Library/Printers",
+                    "/Library/PrivilegedHelperTools",
+                    "/Library/Python",
+                    "/Library/QuickLook",
+                    "/Library/QuickTime",
+                    "/Library/Receipts",
+                    "/Library/Ruby",
+                    "/Library/Sandbox",
+                    "/Library/Screen Savers",
+                    "/Library/ScriptingAdditions",
+                    "/Library/Scripts",
+                    "/Library/Security",
+                    "/Library/Speech",
+                    "/Library/Spelling",
+                    "/Library/Spotlight",
+                    "/Library/StartupItems",
+                    "/Library/SystemProfiler",
+                    "/Library/Updates",
+                    "/Library/User Pictures",
+                    "/Library/Video",
+                    "/Library/WebServer",
+                    "/Library/Widgets",
+                    "/Library/iTunes",
+                    "/Network",
+                    "/System",
+                    "/System/Library",
+                    "/System/Library/Accessibility",
+                    "/System/Library/Accounts",
+                    "/System/Library/Address Book Plug-Ins",
+                    "/System/Library/Assistant",
+                    "/System/Library/Automator",
+                    "/System/Library/BridgeSupport",
+                    "/System/Library/Caches",
+                    "/System/Library/ColorPickers",
+                    "/System/Library/ColorSync",
+                    "/System/Library/Colors",
+                    "/System/Library/Components",
+                    "/System/Library/Compositions",
+                    "/System/Library/CoreServices",
+                    "/System/Library/DTDs",
+                    "/System/Library/DirectoryServices",
+                    "/System/Library/Displays",
+                    "/System/Library/Extensions",
+                    "/System/Library/Filesystems",
+                    "/System/Library/Filters",
+                    "/System/Library/Fonts",
+                    "/System/Library/Frameworks",
+                    "/System/Library/Graphics",
+                    "/System/Library/IdentityServices",
+                    "/System/Library/Image Capture",
+                    "/System/Library/Input Methods",
+                    "/System/Library/InternetAccounts",
+                    "/System/Library/Java",
+                    "/System/Library/KerberosPlugins",
+                    "/System/Library/Keyboard Layouts",
+                    "/System/Library/Keychains",
+                    "/System/Library/LaunchAgents",
+                    "/System/Library/LaunchDaemons",
+                    "/System/Library/LinguisticData",
+                    "/System/Library/LocationBundles",
+                    "/System/Library/LoginPlugins",
+                    "/System/Library/Messages",
+                    "/System/Library/Metadata",
+                    "/System/Library/MonitorPanels",
+                    "/System/Library/OpenDirectory",
+                    "/System/Library/OpenSSL",
+                    "/System/Library/Password Server Filters",
+                    "/System/Library/PerformanceMetrics",
+                    "/System/Library/Perl",
+                    "/System/Library/PreferencePanes",
+                    "/System/Library/Printers",
+                    "/System/Library/PrivateFrameworks",
+                    "/System/Library/QuickLook",
+                    "/System/Library/QuickTime",
+                    "/System/Library/QuickTimeJava",
+                    "/System/Library/Recents",
+                    "/System/Library/SDKSettingsPlist",
+                    "/System/Library/Sandbox",
+                    "/System/Library/Screen Savers",
+                    "/System/Library/ScreenReader",
+                    "/System/Library/ScriptingAdditions",
+                    "/System/Library/ScriptingDefinitions",
+                    "/System/Library/Security",
+                    "/System/Library/Services",
+                    "/System/Library/Sounds",
+                    "/System/Library/Speech",
+                    "/System/Library/Spelling",
+                    "/System/Library/Spotlight",
+                    "/System/Library/StartupItems",
+                    "/System/Library/SyncServices",
+                    "/System/Library/SystemConfiguration",
+                    "/System/Library/SystemProfiler",
+                    "/System/Library/Tcl",
+                    "/System/Library/TextEncodings",
+                    "/System/Library/User Template",
+                    "/System/Library/UserEventPlugins",
+                    "/System/Library/Video",
+                    "/System/Library/WidgetResources",
+                    "/User Information",
+                    "/Users",
+                    "/Volumes",
+                    "/bin",
+                    "/boot",
+                    "/cores",
+                    "/dev",
+                    "/etc",
+                    "/etc/X11",
+                    "/etc/opt",
+                    "/etc/sgml",
+                    "/etc/xml",
+                    "/home",
+                    "/libexec",
+                    "/lost+found",
+                    "/media",
+                    "/mnt",
+                    "/net",
+                    "/opt",
+                    "/private",
+                    "/private/etc",
+                    "/private/tftpboot",
+                    "/private/tmp",
+                    "/private/var",
+                    "/proc",
+                    "/root",
+                    "/sbin",
+                    "/srv",
+                    "/tmp",
+                    "/usr",
+                    "/usr/X11R6",
+                    "/usr/bin",
+                    "/usr/etc",
+                    "/usr/include",
+                    "/usr/lib",
+                    "/usr/libexec",
+                    "/usr/local",
+                    "/usr/local/Cellar",
+                    "/usr/local/Frameworks",
+                    "/usr/local/Library",
+                    "/usr/local/bin",
+                    "/usr/local/etc",
+                    "/usr/local/include",
+                    "/usr/local/lib",
+                    "/usr/local/libexec",
+                    "/usr/local/opt",
+                    "/usr/local/share",
+                    "/usr/local/share/man",
+                    "/usr/local/share/man/man1",
+                    "/usr/local/share/man/man2",
+                    "/usr/local/share/man/man3",
+                    "/usr/local/share/man/man4",
+                    "/usr/local/share/man/man5",
+                    "/usr/local/share/man/man6",
+                    "/usr/local/share/man/man7",
+                    "/usr/local/share/man/man8",
+                    "/usr/local/share/man/man9",
+                    "/usr/local/share/man/mann",
+                    "/usr/local/var",
+                    "/usr/local/var/lib",
+                    "/usr/local/var/lock",
+                    "/usr/local/var/run",
+                    "/usr/sbin",
+                    "/usr/share",
+                    "/usr/share/man",
+                    "/usr/share/man/man1",
+                    "/usr/share/man/man2",
+                    "/usr/share/man/man3",
+                    "/usr/share/man/man4",
+                    "/usr/share/man/man5",
+                    "/usr/share/man/man6",
+                    "/usr/share/man/man7",
+                    "/usr/share/man/man8",
+                    "/usr/share/man/man9",
+                    "/usr/share/man/mann",
+                    "/usr/src",
+                    "/var",
+                    "/var/cache",
+                    "/var/lib",
+                    "/var/lock",
+                    "/var/log",
+                    "/var/mail",
+                    "/var/run",
+                    "/var/spool",
+                    "/var/spool/mail",
+                    "/var/tmp",
+                  ]
+                  .map(&method(:Pathname))
+                  .to_set
+                  .freeze
 
-  # TODO: There should be a way to specify a containing
-  #       directory under which nothing can be deleted.
-  UNDELETABLE_DIRS = [
-                       "~/",
-                       "~/Applications",
-                       "~/Desktop",
-                       "~/Documents",
-                       "~/Downloads",
-                       "~/Mail",
-                       "~/Movies",
-                       "~/Music",
-                       "~/Music/iTunes",
-                       "~/Music/iTunes/iTunes Music",
-                       "~/Music/iTunes/Album Artwork",
-                       "~/News",
-                       "~/Pictures",
-                       "~/Pictures/Desktops",
-                       "~/Pictures/Photo Booth",
-                       "~/Pictures/iChat Icons",
-                       "~/Pictures/iPhoto Library",
-                       "~/Public",
-                       "~/Sites",
-                       "~/Library",
-                       "~/Library/.localized",
-                       "~/Library/Accessibility",
-                       "~/Library/Accounts",
-                       "~/Library/Address Book Plug-Ins",
-                       "~/Library/Application Scripts",
-                       "~/Library/Application Support",
-                       "~/Library/Application Support/Apple",
-                       "~/Library/Application Support/com.apple.AssistiveControl",
-                       "~/Library/Application Support/com.apple.QuickLook",
-                       "~/Library/Application Support/com.apple.TCC",
-                       "~/Library/Assistants",
-                       "~/Library/Audio",
-                       "~/Library/Automator",
-                       "~/Library/Autosave Information",
-                       "~/Library/Caches",
-                       "~/Library/Calendars",
-                       "~/Library/ColorPickers",
-                       "~/Library/ColorSync",
-                       "~/Library/Colors",
-                       "~/Library/Components",
-                       "~/Library/Compositions",
-                       "~/Library/Containers",
-                       "~/Library/Contextual Menu Items",
-                       "~/Library/Cookies",
-                       "~/Library/DTDs",
-                       "~/Library/Desktop Pictures",
-                       "~/Library/Developer",
-                       "~/Library/Dictionaries",
-                       "~/Library/DirectoryServices",
-                       "~/Library/Displays",
-                       "~/Library/Documentation",
-                       "~/Library/Extensions",
-                       "~/Library/Favorites",
-                       "~/Library/FileSync",
-                       "~/Library/Filesystems",
-                       "~/Library/Filters",
-                       "~/Library/FontCollections",
-                       "~/Library/Fonts",
-                       "~/Library/Frameworks",
-                       "~/Library/GameKit",
-                       "~/Library/Graphics",
-                       "~/Library/Group Containers",
-                       "~/Library/Icons",
-                       "~/Library/IdentityServices",
-                       "~/Library/Image Capture",
-                       "~/Library/Images",
-                       "~/Library/Input Methods",
-                       "~/Library/Internet Plug-Ins",
-                       "~/Library/InternetAccounts",
-                       "~/Library/iTunes",
-                       "~/Library/KeyBindings",
-                       "~/Library/Keyboard Layouts",
-                       "~/Library/Keychains",
-                       "~/Library/LaunchAgents",
-                       "~/Library/LaunchDaemons",
-                       "~/Library/LocationBundles",
-                       "~/Library/LoginPlugins",
-                       "~/Library/Logs",
-                       "~/Library/Mail",
-                       "~/Library/Mail Downloads",
-                       "~/Library/Messages",
-                       "~/Library/Metadata",
-                       "~/Library/Mobile Documents",
-                       "~/Library/MonitorPanels",
-                       "~/Library/OpenDirectory",
-                       "~/Library/PDF Services",
-                       "~/Library/PhonePlugins",
-                       "~/Library/Phones",
-                       "~/Library/PreferencePanes",
-                       "~/Library/Preferences",
-                       "~/Library/Printers",
-                       "~/Library/PrivateFrameworks",
-                       "~/Library/PubSub",
-                       "~/Library/QuickLook",
-                       "~/Library/QuickTime",
-                       "~/Library/Receipts",
-                       "~/Library/Recent Servers",
-                       "~/Library/Recents",
-                       "~/Library/Safari",
-                       "~/Library/Saved Application State",
-                       "~/Library/Screen Savers",
-                       "~/Library/ScreenReader",
-                       "~/Library/ScriptingAdditions",
-                       "~/Library/ScriptingDefinitions",
-                       "~/Library/Scripts",
-                       "~/Library/Security",
-                       "~/Library/Services",
-                       "~/Library/Sounds",
-                       "~/Library/Speech",
-                       "~/Library/Spelling",
-                       "~/Library/Spotlight",
-                       "~/Library/StartupItems",
-                       "~/Library/StickiesDatabase",
-                       "~/Library/Sync Services",
-                       "~/Library/SyncServices",
-                       "~/Library/SyncedPreferences",
-                       "~/Library/TextEncodings",
-                       "~/Library/User Pictures",
-                       "~/Library/Video",
-                       "~/Library/Voices",
-                       "~/Library/WebKit",
-                       "~/Library/WidgetResources",
-                       "~/Library/Widgets",
-                       "~/Library/Workflows",
-                     ]
-                     .map { |x| Pathname(x.sub(%r{^~(?=(/|$))}, Dir.home)).expand_path }
-                     .to_set
-                     .union(SYSTEM_DIRS)
-                     .freeze
+    # TODO: There should be a way to specify a containing
+    #       directory under which nothing can be deleted.
+    UNDELETABLE_DIRS = [
+                         "~/",
+                         "~/Applications",
+                         "~/Desktop",
+                         "~/Documents",
+                         "~/Downloads",
+                         "~/Mail",
+                         "~/Movies",
+                         "~/Music",
+                         "~/Music/iTunes",
+                         "~/Music/iTunes/iTunes Music",
+                         "~/Music/iTunes/Album Artwork",
+                         "~/News",
+                         "~/Pictures",
+                         "~/Pictures/Desktops",
+                         "~/Pictures/Photo Booth",
+                         "~/Pictures/iChat Icons",
+                         "~/Pictures/iPhoto Library",
+                         "~/Public",
+                         "~/Sites",
+                         "~/Library",
+                         "~/Library/.localized",
+                         "~/Library/Accessibility",
+                         "~/Library/Accounts",
+                         "~/Library/Address Book Plug-Ins",
+                         "~/Library/Application Scripts",
+                         "~/Library/Application Support",
+                         "~/Library/Application Support/Apple",
+                         "~/Library/Application Support/com.apple.AssistiveControl",
+                         "~/Library/Application Support/com.apple.QuickLook",
+                         "~/Library/Application Support/com.apple.TCC",
+                         "~/Library/Assistants",
+                         "~/Library/Audio",
+                         "~/Library/Automator",
+                         "~/Library/Autosave Information",
+                         "~/Library/Caches",
+                         "~/Library/Calendars",
+                         "~/Library/ColorPickers",
+                         "~/Library/ColorSync",
+                         "~/Library/Colors",
+                         "~/Library/Components",
+                         "~/Library/Compositions",
+                         "~/Library/Containers",
+                         "~/Library/Contextual Menu Items",
+                         "~/Library/Cookies",
+                         "~/Library/DTDs",
+                         "~/Library/Desktop Pictures",
+                         "~/Library/Developer",
+                         "~/Library/Dictionaries",
+                         "~/Library/DirectoryServices",
+                         "~/Library/Displays",
+                         "~/Library/Documentation",
+                         "~/Library/Extensions",
+                         "~/Library/Favorites",
+                         "~/Library/FileSync",
+                         "~/Library/Filesystems",
+                         "~/Library/Filters",
+                         "~/Library/FontCollections",
+                         "~/Library/Fonts",
+                         "~/Library/Frameworks",
+                         "~/Library/GameKit",
+                         "~/Library/Graphics",
+                         "~/Library/Group Containers",
+                         "~/Library/Icons",
+                         "~/Library/IdentityServices",
+                         "~/Library/Image Capture",
+                         "~/Library/Images",
+                         "~/Library/Input Methods",
+                         "~/Library/Internet Plug-Ins",
+                         "~/Library/InternetAccounts",
+                         "~/Library/iTunes",
+                         "~/Library/KeyBindings",
+                         "~/Library/Keyboard Layouts",
+                         "~/Library/Keychains",
+                         "~/Library/LaunchAgents",
+                         "~/Library/LaunchDaemons",
+                         "~/Library/LocationBundles",
+                         "~/Library/LoginPlugins",
+                         "~/Library/Logs",
+                         "~/Library/Mail",
+                         "~/Library/Mail Downloads",
+                         "~/Library/Messages",
+                         "~/Library/Metadata",
+                         "~/Library/Mobile Documents",
+                         "~/Library/MonitorPanels",
+                         "~/Library/OpenDirectory",
+                         "~/Library/PDF Services",
+                         "~/Library/PhonePlugins",
+                         "~/Library/Phones",
+                         "~/Library/PreferencePanes",
+                         "~/Library/Preferences",
+                         "~/Library/Printers",
+                         "~/Library/PrivateFrameworks",
+                         "~/Library/PubSub",
+                         "~/Library/QuickLook",
+                         "~/Library/QuickTime",
+                         "~/Library/Receipts",
+                         "~/Library/Recent Servers",
+                         "~/Library/Recents",
+                         "~/Library/Safari",
+                         "~/Library/Saved Application State",
+                         "~/Library/Screen Savers",
+                         "~/Library/ScreenReader",
+                         "~/Library/ScriptingAdditions",
+                         "~/Library/ScriptingDefinitions",
+                         "~/Library/Scripts",
+                         "~/Library/Security",
+                         "~/Library/Services",
+                         "~/Library/Sounds",
+                         "~/Library/Speech",
+                         "~/Library/Spelling",
+                         "~/Library/Spotlight",
+                         "~/Library/StartupItems",
+                         "~/Library/StickiesDatabase",
+                         "~/Library/Sync Services",
+                         "~/Library/SyncServices",
+                         "~/Library/SyncedPreferences",
+                         "~/Library/TextEncodings",
+                         "~/Library/User Pictures",
+                         "~/Library/Video",
+                         "~/Library/Voices",
+                         "~/Library/WebKit",
+                         "~/Library/WidgetResources",
+                         "~/Library/Widgets",
+                         "~/Library/Workflows",
+                       ]
+                       .map { |x| Pathname(x.sub(%r{^~(?=(/|$))}, Dir.home)).expand_path }
+                       .to_set
+                       .union(SYSTEM_DIRS)
+                       .freeze
 
-  def system_dir?(dir)
-    SYSTEM_DIRS.include?(Pathname.new(dir).expand_path)
-  end
+    def system_dir?(dir)
+      SYSTEM_DIRS.include?(Pathname.new(dir).expand_path)
+    end
 
-  def undeletable?(dir)
-    UNDELETABLE_DIRS.include?(Pathname.new(dir).expand_path)
+    def undeletable?(dir)
+      UNDELETABLE_DIRS.include?(Pathname.new(dir).expand_path)
+    end
   end
-
-  alias release version
 end