100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
|
"""architecture matching
|
||
|
|
||
|
@copyright: 2014, Ansgar Burchardt <ansgar@debian.org>
|
||
|
@license: GPL-2+
|
||
|
"""
|
||
|
|
||
|
# 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
|
||
|
|
||
|
def _load_table(path):
|
||
|
table = []
|
||
|
with open(path, 'r') as fh:
|
||
|
for line in fh:
|
||
|
if not line or line.startswith('#'):
|
||
|
continue
|
||
|
table.append(line.split())
|
||
|
return table
|
||
|
|
||
|
_cached_cputable = None
|
||
|
def _cputable():
|
||
|
global _cached_cputable
|
||
|
if _cached_cputable is None:
|
||
|
_cached_cputable = _load_table('/usr/share/dpkg/cputable')
|
||
|
return _cached_cputable
|
||
|
|
||
|
_cached_arch2triplet = None
|
||
|
_cached_triplet2arch = None
|
||
|
def _triplettable():
|
||
|
global _cached_arch2triplet, _cached_triplet2arch
|
||
|
if _cached_arch2triplet is None or _cached_triplet2arch is None:
|
||
|
table = _load_table('/usr/share/dpkg/triplettable')
|
||
|
arch2triplet = {}
|
||
|
triplet2arch = {}
|
||
|
for row in table:
|
||
|
if '<cpu>' in row[0] or '<cpu>' in row[1]:
|
||
|
for cpu in _cputable():
|
||
|
replaced_row = [ column.replace('<cpu>', cpu[0]) for column in row ]
|
||
|
arch2triplet[replaced_row[1]] = replaced_row[0]
|
||
|
triplet2arch[replaced_row[0]] = replaced_row[1]
|
||
|
else:
|
||
|
arch2triplet[row[1]] = row[0]
|
||
|
triplet2arch[row[0]] = row[1]
|
||
|
_cached_arch2triplet = arch2triplet
|
||
|
_cached_triplet2arch = triplet2arch
|
||
|
return _cached_triplet2arch, _cached_arch2triplet
|
||
|
|
||
|
class InvalidArchitecture(Exception):
|
||
|
pass
|
||
|
|
||
|
def Debian_arch_to_Debian_triplet(arch):
|
||
|
parts = arch.split('-')
|
||
|
|
||
|
# Handle architecture wildcards
|
||
|
if 'any' in parts:
|
||
|
if len(parts) == 3:
|
||
|
return parts
|
||
|
elif len(parts) == 2:
|
||
|
return 'any', parts[0], parts[1]
|
||
|
else:
|
||
|
return 'any', 'any', 'any'
|
||
|
|
||
|
if len(parts) == 2 and parts[0] == 'linux':
|
||
|
arch = parts[1]
|
||
|
|
||
|
triplet = _triplettable()[1].get(arch, None)
|
||
|
if triplet is None:
|
||
|
return None
|
||
|
return triplet.split('-', 2)
|
||
|
|
||
|
def match_architecture(arch, wildcard):
|
||
|
# 'all' has no valid triplet
|
||
|
if arch == 'all' or wildcard == 'all':
|
||
|
return arch == wildcard
|
||
|
if wildcard is 'any' or arch == wildcard:
|
||
|
return True
|
||
|
|
||
|
triplet_arch = Debian_arch_to_Debian_triplet(arch)
|
||
|
triplet_wildcard = Debian_arch_to_Debian_triplet(wildcard)
|
||
|
|
||
|
if triplet_arch is None or len(triplet_arch) != 3:
|
||
|
raise InvalidArchitecture('{0} is not a valid architecture name'.format(arch))
|
||
|
if triplet_wildcard is None or len(triplet_wildcard) != 3:
|
||
|
raise InvalidArchitecture('{0} is not a valid architecture name or wildcard'.format(wildcard))
|
||
|
|
||
|
for i in range(0,3):
|
||
|
if triplet_arch[i] != triplet_wildcard[i] and triplet_wildcard[i] != 'any':
|
||
|
return False
|
||
|
return True
|