1"""architecture matching
3@copyright: 2014, Ansgar Burchardt <ansgar@debian.org>
4@license: GPL-2+
5"""
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21import errno
24def _load_table(path):
25 table = []
26 with open(path, 'r') as fh:
27 for line in fh:
28 if not line or line.startswith('#'):
29 continue
30 table.append(line.split())
31 return table
34_cached_cputable = None
37def _cputable():
38 global _cached_cputable
39 if _cached_cputable is None:
40 _cached_cputable = _load_table('/usr/share/dpkg/cputable')
41 return _cached_cputable
44_cached_arch2tuple = None
45_cached_tuple2arch = None
48def _tupletable():
49 global _cached_arch2tuple, _cached_tuple2arch
50 if _cached_arch2tuple is None or _cached_tuple2arch is None:
51 try:
52 tripletable = False
53 table = _load_table('/usr/share/dpkg/tupletable')
54 except OSError as e:
55 if e.errno != errno.ENOENT:
56 raise
57 tripletable = True
58 table = _load_table('/usr/share/dpkg/triplettable')
60 arch2tuple = {}
61 tuple2arch = {}
63 def add_tuple(tuple, arch):
64 if tripletable: 64 ↛ 65line 64 didn't jump to line 65, because the condition on line 64 was never true
65 tuple = "base-{}".format(tuple)
66 arch2tuple[arch] = tuple
67 tuple2arch[tuple] = arch
69 for row in table:
70 if '<cpu>' in row[0] or '<cpu>' in row[1]:
71 for cpu in _cputable():
72 replaced_row = [column.replace('<cpu>', cpu[0]) for column in row]
73 add_tuple(replaced_row[0], replaced_row[1])
74 else:
75 add_tuple(row[0], row[1])
77 _cached_arch2tuple = arch2tuple
78 _cached_tuple2arch = tuple2arch
79 return _cached_tuple2arch, _cached_arch2tuple
82class InvalidArchitecture(Exception):
83 pass
86def Debian_arch_to_Debian_tuple(arch: str):
87 parts = arch.split('-')
89 # Handle architecture wildcards
90 if 'any' in parts:
91 if len(parts) == 4: 91 ↛ 92line 91 didn't jump to line 92, because the condition on line 91 was never true
92 return parts
93 elif len(parts) == 3: 93 ↛ 94line 93 didn't jump to line 94, because the condition on line 93 was never true
94 return 'any', parts[0], parts[1], parts[2]
95 elif len(parts) == 2: 95 ↛ 98line 95 didn't jump to line 98, because the condition on line 95 was never false
96 return 'any', 'any', parts[0], parts[1]
97 else:
98 return 'any', 'any', 'any', 'any'
100 if len(parts) == 2 and parts[0] == 'linux':
101 arch = parts[1]
103 tuple = _tupletable()[1].get(arch, None)
104 if tuple is None: 104 ↛ 105line 104 didn't jump to line 105, because the condition on line 104 was never true
105 return None
106 return tuple.split('-', 3)
109def match_architecture(arch: str, wildcard: str) -> bool:
110 # 'all' has no valid tuple
111 if arch == 'all' or wildcard == 'all':
112 return arch == wildcard
113 if wildcard == 'any' or arch == wildcard:
114 return True
116 tuple_arch = Debian_arch_to_Debian_tuple(arch)
117 tuple_wildcard = Debian_arch_to_Debian_tuple(wildcard)
119 if tuple_arch is None or len(tuple_arch) != 4: 119 ↛ 120line 119 didn't jump to line 120, because the condition on line 119 was never true
120 raise InvalidArchitecture('{0} is not a valid architecture name'.format(arch))
121 if tuple_wildcard is None or len(tuple_wildcard) != 4: 121 ↛ 122line 121 didn't jump to line 122, because the condition on line 121 was never true
122 raise InvalidArchitecture('{0} is not a valid architecture name or wildcard'.format(wildcard))
124 for i in range(0, 4):
125 if tuple_arch[i] != tuple_wildcard[i] and tuple_wildcard[i] != 'any':
126 return False
127 return True