reduce finding time zone file to top level distro

remove duplicates of some code.

1 files changed, 9 insertions, 0 deletions

diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py
index 249e1b19..74e95797 100644
--- a/cloudinit/distros/__init__.py
+++ b/cloudinit/distros/__init__.py
@@ -47,9 +47,11 @@ LOG = logging.getLogger(__name__)
 
 class Distro(object):
     __metaclass__ = abc.ABCMeta
+
     hosts_fn = "/etc/hosts"
     ci_sudoers_fn = "/etc/sudoers.d/90-cloud-init-users"
     hostname_conf_fn = "/etc/hostname"
+    tz_zone_dir = "/usr/share/zoneinfo"
 
     def __init__(self, name, cfg, paths):
         self._paths = paths
@@ -66,6 +68,13 @@ class Distro(object):
         # to write this blob out in a distro format
         raise NotImplementedError()
 
+    def _find_tz_file(self, tz):
+        tz_file = os.path.join(self.tz_zone_dir, str(tz))
+        if not os.path.isfile(tz_file):
+            raise IOError(("Invalid timezone %s,"
+                           " no file found at %s") % (tz, tz_file))
+        return tz_file
+
     def get_option(self, opt_name, default=None):
         return self._cfg.get(opt_name, default)