Move LayoutTest Linux distribution detection to PlatformInfo

Tools/Scripts/webkitpy/common/system/platforminfo.py

 # Copyright (c) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 25 matching lines @@
     to be used by the rest of the webkitpy code base.
 
     Public (static) properties:
     -- os_name
     -- os_version
 
     Note that 'future' is returned for os_version if the operating system is
     newer than one known to the code.
     """
 
-    def __init__(self, sys_module, platform_module, executive):
+    def __init__(self, sys_module, platform_module, filesystem_module, executive):
         self._executive = executive
+        self._filesystem = filesystem_module
         self._platform_module = platform_module
         self.os_name = self._determine_os_name(sys_module.platform)
         if self.os_name == 'linux':
             self.os_version = self._determine_linux_version()
         if self.os_name == 'freebsd':
             self.os_version = platform_module.release()
         if self.os_name.startswith('mac'):
             self.os_version = self._determine_mac_version(platform_module.mac_ver()[0])
         if self.os_name.startswith('win'):
             self.os_version = self._determine_win_version(self._win_version_tuple(sys_module))
@@ skipping 54 matching lines @@
             else:
                 import fcntl
                 import struct
                 import termios
                 packed = fcntl.ioctl(sys.stderr.fileno(), termios.TIOCGWINSZ, '\0' * 8)
                 _, columns, _, _ = struct.unpack('HHHH', packed)
                 return columns
         except:
             return sys.maxint
 
+    def linux_distribution(self):
+        if not self.is_linux():
+            return None
+
+        if self._filesystem.exists('/etc/redhat-release'):
+            return 'redhat'
+        if self._filesystem.exists('/etc/debian_version'):
+            return 'debian'
+        if self._filesystem.exists('/etc/arch-release'):
+            return 'arch'
+
+        return 'unknown'
+
     def _determine_os_name(self, sys_platform):
         if sys_platform == 'darwin':
             return 'mac'
         if sys_platform.startswith('linux'):
             return 'linux'
         if sys_platform in ('win32', 'cygwin'):
             return 'win'
         if sys_platform.startswith('freebsd'):
             return 'freebsd'
         raise AssertionError('unrecognized platform string "%s"' % sys_platform)
@@ skipping 29 matching lines @@
         if hasattr(sys_module, 'getwindowsversion'):
             return sys_module.getwindowsversion()
         return self._win_version_tuple_from_cmd()
 
     def _win_version_tuple_from_cmd(self):
         # Note that this should only ever be called on windows, so this should always work.
         ver_output = self._executive.run_command(['cmd', '/c', 'ver'], decode_output=False)
         match_object = re.search(r'(?P<major>\d+)\.(?P<minor>\d)\.(?P<build>\d+)', ver_output)
         assert match_object, 'cmd returned an unexpected version string: ' + ver_output
         return tuple(map(int, match_object.groups()))