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
|
""" Pacman backend for :mod:`Bcfg2.Server.Plugins.Packages` """
import os
import tarfile
from Bcfg2.Server.Plugins.Packages.Collection import Collection
from Bcfg2.Server.Plugins.Packages.Source import Source
def parse_db_file(pkgfile):
""" Parse a Pacman database file, returning a dictionary with
section headings for keys and lists of strings for values.
(Reference: ``sync_db_read`` in ``lib/libalpm/be_sync.c``)
"""
pkg = {}
section = None
for line in pkgfile:
line = line.strip()
if section is not None:
if not line:
section = None
else:
pkg[section].append(line)
elif len(line) >= 2 and line[0] == line[-1] == '%':
section = line
pkg[section] = []
return pkg
def parse_dep(dep):
""" Parse a Pacman dependency string, returning the package name,
version restriction (or ``None``), and description (or ``None``).
(Reference: ``alpm_dep_from_string`` in ``lib/libalpm/deps.c``)
"""
rest_desc = dep.split(': ', 1)
if len(rest_desc) == 1:
rest, desc = rest_desc[0], None
else:
rest, desc = rest_desc
# Search for '=' last, since '<=' and '>=' are possible.
for symb in ['<', '>', '=']:
idx = rest.find(symb)
if idx >= 0:
name = rest[:idx]
version = rest[idx:]
break
else:
name = rest
version = None
return name, version, desc
class PacCollection(Collection):
""" Handle collections of Pacman sources. This is a no-op object
that simply inherits from
:class:`Bcfg2.Server.Plugins.Packages.Collection.Collection`,
overrides nothing, and defers all operations to :class:`PacSource`
"""
def __init__(self, metadata, sources, cachepath, basepath, debug=False):
# we define an __init__ that just calls the parent __init__,
# so that we can set the docstring on __init__ to something
# different from the parent __init__ -- namely, the parent
# __init__ docstring, minus everything after ``.. -----``,
# which we use to delineate the actual docs from the
# .. autoattribute hacks we have to do to get private
# attributes included in sphinx 1.0 """
Collection.__init__(self, metadata, sources, cachepath, basepath,
debug=debug)
__init__.__doc__ = Collection.__init__.__doc__.split(".. -----")[0]
class PacSource(Source):
""" Handle Pacman sources """
#: PacSource sets the ``type`` on Package entries to "pacman"
ptype = 'pacman'
@property
def urls(self):
""" A list of URLs to the base metadata file for each
repository described by this source. """
if not self.rawurl:
rv = []
for part in self.components:
for arch in self.arches:
rv.append("%s%s/os/%s/%s.db.tar.gz" %
(self.url, part, arch, part))
return rv
else:
raise Exception("PacSource : RAWUrl not supported (yet)")
def read_files(self):
bdeps = {}
brecs = {}
bprov = {}
for fname in self.files:
if not self.rawurl:
barch = [x for x in fname.split('@') if x in self.arches][0]
else:
# RawURL entries assume that they only have one <Arch></Arch>
# element and that it is the architecture of the source.
barch = self.arches[0]
if barch not in bdeps:
bdeps[barch] = {}
brecs[barch] = {}
bprov[barch] = {}
try:
self.debug_log("Packages: try to read %s" % fname)
tar = tarfile.open(fname, "r")
except (IOError, tarfile.TarError):
self.logger.error("Packages: Failed to read file %s" % fname)
raise
packages = {}
for tarinfo in tar:
if not tarinfo.isfile():
continue
prefix = os.path.dirname(tarinfo.name)
if prefix not in packages:
packages[prefix] = {}
pkg = parse_db_file(tar.extractfile(tarinfo))
packages[prefix].update(pkg)
for pkg in packages.values():
pkgname = pkg['%NAME%'][0]
self.pkgnames.add(pkgname)
bdeps[barch][pkgname] = []
brecs[barch][pkgname] = []
if '%DEPENDS%' in pkg:
for dep in pkg['%DEPENDS%']:
dname = parse_dep(dep)[0]
bdeps[barch][pkgname].append(dname)
if '%OPTDEPENDS%' in pkg:
for dep in pkg['%OPTDEPENDS%']:
dname = parse_dep(dep)[0]
brecs[barch][pkgname].append(dname)
if '%PROVIDES%' in pkg:
for dep in pkg['%PROVIDES%']:
dname = parse_dep(dep)[0]
if dname not in bprov[barch]:
bprov[barch][dname] = set()
bprov[barch][dname].add(pkgname)
tar.close()
self.process_files(bdeps, bprov, brecs)
read_files.__doc__ = Source.read_files.__doc__
|
