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""" Handle .cat files, which append lines to and remove lines from
plaintext files """
from Bcfg2.Server.Plugins.Cfg import CfgFilter
class CfgCatFilter(CfgFilter):
""" CfgCatFilter appends lines to and remove lines from plaintext
:ref:`server-plugins-generators-Cfg` files"""
#: Handle .cat files
__extensions__ = ['cat']
#: .cat files are deprecated
deprecated = True
def modify_data(self, entry, metadata, data):
datalines = data.strip().split('\n')
for line in self.data.split('\n'):
if not line:
continue
if line.startswith('+'):
datalines.append(line[1:])
elif line.startswith('-'):
if line[1:] in datalines:
datalines.remove(line[1:])
return "\n".join(datalines) + "\n"
modify_data.__doc__ = CfgFilter.modify_data.__doc__
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