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56 lines
1.8 KiB
56 lines
1.8 KiB
5 years ago
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#!/usr/bin/python2.7
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# Copyright (C) 2019 Canonical Ltd.
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# Author: Brian Murray <brian.murray@canonical.com>
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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 as published by
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# the Free Software Foundation; version 3 of the License.
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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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"""Portions of archive related code that is re-used by various tools."""
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import gzip
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import os
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import tempfile
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import apt_pkg
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def read_tag_file(path, pkg=None):
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tmp = tempfile.NamedTemporaryFile(prefix='checkrdepends.', delete=False)
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try:
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compressed = gzip.open(path)
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try:
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tmp.write(compressed.read())
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finally:
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compressed.close()
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tmp.close()
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with open(tmp.name) as uncompressed:
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tag_file = apt_pkg.TagFile(uncompressed)
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prev_name = None
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prev_stanza = None
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for stanza in tag_file:
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try:
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name = stanza['package']
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except KeyError:
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continue
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if pkg:
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if name != pkg:
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continue
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if name != prev_name and prev_stanza is not None:
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yield prev_stanza
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prev_name = name
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prev_stanza = stanza
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if prev_stanza is not None:
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yield prev_stanza
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finally:
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os.unlink(tmp.name)
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