c876617723
Fix how the comparison of a fqdn and its aliases was done via sorting instead of existence checking which is the better way to check if a alias already exists as well as cleanup the new files pep8/pylint issues.
89 lines
3.0 KiB
Python
89 lines
3.0 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Joshua Harlow <harlowja@yahoo-inc.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from StringIO import StringIO
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from cloudinit.distros.parsers import chop_comment
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# Parser that knows how to work with /etc/hostname format
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class HostnameConf(object):
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def __init__(self, text):
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self._text = text
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self._contents = None
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def parse(self):
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if self._contents is None:
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self._contents = self._parse(self._text)
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def __str__(self):
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self.parse()
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contents = StringIO()
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for (line_type, components) in self._contents:
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if line_type == 'blank':
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contents.write("%s\n" % (components[0]))
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elif line_type == 'all_comment':
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contents.write("%s\n" % (components[0]))
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elif line_type == 'hostname':
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(hostname, tail) = components
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contents.write("%s%s\n" % (hostname, tail))
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# Ensure trailing newline
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contents = contents.getvalue()
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if not contents.endswith("\n"):
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contents += "\n"
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return contents
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@property
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def hostname(self):
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self.parse()
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for (line_type, components) in self._contents:
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if line_type == 'hostname':
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return components[0]
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return None
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def set_hostname(self, your_hostname):
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your_hostname = your_hostname.strip()
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if not your_hostname:
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return
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self.parse()
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replaced = False
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for (line_type, components) in self._contents:
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if line_type == 'hostname':
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components[0] = str(your_hostname)
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replaced = True
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if not replaced:
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self._contents.append(('hostname', [str(your_hostname), '']))
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def _parse(self, contents):
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entries = []
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hostnames_found = set()
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for line in contents.splitlines():
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if not len(line.strip()):
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entries.append(('blank', [line]))
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continue
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(head, tail) = chop_comment(line.strip(), '#')
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if not len(head):
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entries.append(('all_comment', [line]))
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continue
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entries.append(('hostname', [head, tail]))
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hostnames_found.add(head)
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if len(hostnames_found) > 1:
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raise IOError("Multiple hostnames (%s) found!"
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% (hostnames_found))
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return entries
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