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
|
#!/usr/bin/python
#
# Copyright (C) 2007 Enrico Zini <enrico@debian.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.
# Given a file, search Debian packages that can somehow handle it
import sys
# Requires python-extractor, python-magic and python-debtags
import extractor
import magic
from debian import debtags
import re
from optparse import OptionParser
import apt
VERSION="0.1"
mime_map = (
( r'text/html\b', ("works-with::text","works-with-format::html") ),
( r'text/plain\b', ("works-with::text","works-with-format::plaintext") ),
( r'text/troff\b', ("works-with::text", "works-with-format::man") ),
( r'image/', ("works-with::image",) ),
( r'image/jpeg\b', ("works-with::image:raster","works-with-format::jpg") ),
( r'image/png\b', ("works-with::image:raster","works-with-format::png") ),
( r'application/pdf\b', ("works-with::text","works-with-format::pdf")),
( r'application/postscript\b', ("works-with::text","works-with-format::postscript")),
( r'application/x-iso9660\b', ('works-with-format::iso9660',)),
( r'application/zip\b', ('works-with::archive', 'works-with-format::zip')),
( r'application/x-tar\b', ('works-with::archive', 'works-with-format::tar')),
( r'audio/', ("works-with::audio",) ),
( r'audio/mpeg\b', ("works-with-format::mp3",) ),
( r'audio/x-wav\b', ("works-with-format::wav",) ),
( r'message/rfc822\b', ("works-with::mail",) ),
( r'video/', ("works-with::video",)),
( r'application/x-debian-package\b', ("works-with::software:package",)),
( r'application/vnd.oasis.opendocument.text\b', ("works-with::text",)),
( r'application/vnd.oasis.opendocument.graphics\b', ("works-with::image:vector",)),
( r'application/vnd.oasis.opendocument.spreadsheet\b', ("works-with::spreadsheet",)),
( r'application/vnd.sun.xml.base\b', ("works-with::db",)),
( r'application/rtf\b', ("works-with::text",)),
( r'application/x-dbm\b', ("works-with::db",)),
# How do we tell these two apart?
# ( 'application/ogg', ('works-with-format::oggvorbis',)),
# ( 'application/ogg', ('works-with-format::oggtheora',)),
# Missing tags
# ( 'application/vnd.oasis.opendocument.presentation', ),
# Still unhandled/unhandlable:
# works-with::3dmodel - 3D Model
# works-with::dictionary - Dictionaries
# works-with::dtp - Desktop Publishing (DTP)
# works-with::fax - Faxes
# works-with::file - Files
# works-with::font - Fonts
# works-with::logfile - System Logs
# works-with::music-notation - Music Notation
# works-with::people - People
# works-with::pim - Personal Information
# works-with::software:source - Source code
# works-with::spreadsheet - Spreadsheet
# works-with::text - Text
# works-with::unicode - Unicode
# works-with-format::docbook - Docbook
# works-with-format::info - Documentation in Info format
# works-with-format::ldif - LDIF
# works-with-format::sgml - SGML, Standard Generalized Markup Language
# works-with-format::svg - SVG, Scalable Vector Graphics
# works-with-format::tex - TeX, LaTeX and DVI
# works-with-format::vrml - VRML 3D Model
# works-with-format::xml - XML
# works-with-format::xml:rss - RSS Rich Site Summary
# works-with-format::xml:xslt - XSL Transformations (XSLT)
)
extractor = extractor.Extractor()
magic = magic.open(magic.MAGIC_MIME)
magic.load()
def mimetype(fname):
keys = extractor.extract(fname)
xkeys = {}
for k, v in keys:
if xkeys.has_key(k):
xkeys[k].append(v)
else:
xkeys[k] = [v]
namemagic = magic.file(fname)
contentmagic = magic.buffer(file(fname, "r").read(4096))
return xkeys.has_key("mimetype") and xkeys['mimetype'][0] or contentmagic or namemagic
class Parser(OptionParser):
def __init__(self, *args, **kwargs):
OptionParser.__init__(self, *args, **kwargs)
def error(self, msg):
sys.stderr.write("%s: error: %s\n\n" % (self._get_prog_name(), msg))
self.print_help(sys.stderr)
sys.exit(2)
if __name__ == '__main__':
parser = Parser(usage="usage: %prog [options] filename",
version="%prog "+ VERSION,
description="search Debian packages that can handle a given file")
parser.add_option("--tagdb", default="/var/lib/debtags/package-tags", help="Tag database to use (default: %default)")
parser.add_option("--action", default=None, help="Show the packages that allow the given action on the file (default: %default)")
(options, args) = parser.parse_args()
if len(args) == 0:
parser.error("Please provide the name of a file to scan")
# Read full database
fullcoll = debtags.DB()
tag_filter = re.compile(r"^special::.+$|^.+::TODO$")
fullcoll.read(open(options.tagdb, "r"), lambda x: not tag_filter.match(x))
type = mimetype(args[0])
#print >>sys.stderr, "Mime type:", type
found = set()
for match, tags in mime_map:
match = re.compile(match)
if match.match(type):
for t in tags:
found.add(t)
if len(found) == 0:
print >>sys.stderr, "Unhandled mime type:", type
else:
if options.action != None:
apt_cache = apt.Cache()
query = found.copy()
query.add("role::program")
query.add("use::"+options.action)
print "Debtags query:", " && ".join(query)
subcoll = fullcoll.filter_packages_tags(lambda pt: query.issubset(pt[1]))
for i in subcoll.iter_packages():
aptpkg = apt_cache[i]
desc = aptpkg.raw_description.split("\n")[0]
print i, "-", desc
else:
print "Debtags query:", " && ".join(found)
query = found.copy()
query.add("role::program")
subcoll = fullcoll.filter_packages_tags(lambda pt: query.issubset(pt[1]))
uses = map(lambda x:x[5:], filter(lambda x:x.startswith("use::"), subcoll.iter_tags()))
print "Available actions:", ", ".join(uses)
# vim:set ts=4 sw=4:
|
