1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
# vim: set fileencoding=utf-8 :
#
# (C) 2011 Guido Günther <agx@sigxcpu.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""A Debian Changelog"""
import email
import os
import subprocess
class NoChangeLogError(Exception):
"""No changelog found"""
pass
class ParseChangeLogError(Exception):
"""Problem parsing changelog"""
pass
class ChangeLogSection(object):
"""A section in the changelog describing one particular version"""
def __init__(self, package, version):
self._package = package
self._version = version
@property
def package(self):
return self._package
@property
def version(self):
return self._version
@classmethod
def parse(klass, section):
"""
Parse one changelog section
@param section: a changelog section
@type section: C{str}
@returns: the parse changelog section
@rtype: L{ChangeLogSection}
"""
header = section.split('\n')[0]
package = header.split()[0]
version = header.split()[1][1:-1]
return klass(package, version)
class ChangeLog(object):
"""A Debian changelog"""
def __init__(self, contents=None, filename=None):
"""
@param contents: the contents of the changelog
@type contents: C{str}
@param filename: the filename of the changelog
@param filename: C{str}
"""
self._contents = ''
self._cp = None
self._filename = filename
# Check that either contents or filename is passed (but not both)
if (not filename and not contents) or (filename and contents):
raise Exception("Either filename or contents must be passed")
if filename and not os.access(filename, os.F_OK):
raise NoChangeLogError, "Changelog %s not found" % (filename, )
if contents:
self._contents = contents[:]
else:
self._read()
self._parse()
def _parse(self):
"""Parse a changelog based on the already read contents."""
cmd = subprocess.Popen(['dpkg-parsechangelog', '-l-'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(output, errors) = cmd.communicate(self._contents)
if cmd.returncode:
raise ParseChangeLogError("Failed to parse changelog. "
"dpkg-parsechangelog said:\n%s" % (errors, ))
# Parse the result of dpkg-parsechangelog (which looks like
# email headers)
cp = email.message_from_string(output)
try:
if ':' in cp['Version']:
cp['Epoch'], cp['NoEpoch-Version'] = cp['Version'].split(':', 1)
else:
cp['NoEpoch-Version'] = cp['Version']
if '-' in cp['NoEpoch-Version']:
cp['Upstream-Version'], cp['Debian-Version'] = cp['NoEpoch-Version'].rsplit('-', 1)
else:
cp['Debian-Version'] = cp['NoEpoch-Version']
except TypeError:
raise ParseChangeLogError, output.split('\n')[0]
self._cp = cp
def _read(self):
with file(self.filename) as f:
self._contents = f.read()
def __getitem__(self, item):
return self._cp[item]
def __setitem__(self, item, value):
self._cp[item] = value
@property
def filename(self):
"""The filename (path) of the changelog"""
return self._filename
@property
def name(self):
"""The packges name"""
return self._cp['Source']
@property
def version(self):
"""The full version string"""
return self._cp['Version']
@property
def upstream_version(self):
"""The upstream version"""
return self._cp['Upstream-Version']
@property
def debian_version(self):
"""The Debian part of the version number"""
return self._cp['Debian-Version']
@property
def epoch(self):
"""The package's epoch"""
return self._cp['Epoch']
@property
def noepoch(self):
"""The version string without the epoch"""
return self._cp['NoEpoch-Version']
def has_epoch(self):
"""
Whether the version has an epoch
@return: C{True} if the version has an epoch, C{False} otherwise
@rtype: C{bool}
"""
return self._cp.has_key('Epoch')
def is_native(self):
"""
Whether this is a native Debian package
"""
return not '-' in self.version
@property
def author(self):
"""
The author of the last modification
"""
return email.Utils.parseaddr(self._cp['Maintainer'])[0]
@property
def email(self):
"""
The author's email
"""
return email.Utils.parseaddr(self._cp['Maintainer'])[1]
@property
def date(self):
"""
The date of the last modification as rfc822 date
"""
return self._cp['Date']
@property
def sections_iter(self):
"""
Iterate over sections in the changelog
"""
section = ''
for line in self._contents.split('\n'):
if line and line[0] not in [ ' ', '\t' ]:
section += line
else:
if section:
yield ChangeLogSection.parse(section)
section = ''
@property
def sections(self):
"""
Get sections in the changelog
"""
return list(self.sections_iter)
|
