72 lines
2 KiB
Python
72 lines
2 KiB
Python
# -*- coding: utf-8 -*-
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#
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# 2016 Darko Poljak (darko.poljak at gmail.com)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import fileinput
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class HostSource(object):
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"""
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Host source object.
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Source can be a sequence or filename (stdin if \'-\').
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In case of filename each line represents one host.
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"""
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def __init__(self, source):
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self.source = source
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def _process_file_line(self, line):
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"""Return host from read line or None if no host present."""
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if not line:
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return None
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# remove comment if present
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comment_index = line.find('#')
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if comment_index >= 0:
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host = line[:comment_index]
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else:
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host = line
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# remove leading and trailing whitespaces
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host = host.strip()
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# skip empty lines
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if host:
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return host
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else:
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return None
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def _hosts_from_sequence(self):
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for host in self.source:
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yield host
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def _hosts_from_file(self):
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for line in fileinput.input(files=(self.source)):
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host = self._process_file_line(line)
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if host:
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yield host
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def hosts(self):
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if not self.source:
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return
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if isinstance(self.source, str):
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yield from self._hosts_from_file()
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else:
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yield from self._hosts_from_sequence()
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def __call__(self):
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yield from self.hosts()
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