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# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import six
class Merger(object):
def __init__(self, _merger, opts):
self._append = 'append' in opts
def __str__(self):
return 'StringMerger: (append=%s)' % (self._append)
# On encountering a unicode object to merge value with
# we will for now just proxy into the string method to let it handle it.
def _on_unicode(self, value, merge_with):
return self._on_str(value, merge_with)
# On encountering a string object to merge with we will
# perform the following action, if appending we will
# merge them together, otherwise we will just return value.
def _on_str(self, value, merge_with):
if not isinstance(value, six.string_types):
return merge_with
if not self._append:
return merge_with
if isinstance(value, six.text_type):
return value + six.text_type(merge_with)
else:
return value + six.binary_type(merge_with)
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