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100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
"""architecture matching
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@copyright: 2014, Ansgar Burchardt <ansgar@debian.org>
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@license: GPL-2+
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"""
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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def _load_table(path):
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table = []
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with open(path, 'r') as fh:
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for line in fh:
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if not line or line.startswith('#'):
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continue
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table.append(line.split())
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return table
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_cached_cputable = None
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def _cputable():
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global _cached_cputable
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if _cached_cputable is None:
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_cached_cputable = _load_table('/usr/share/dpkg/cputable')
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return _cached_cputable
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_cached_arch2triplet = None
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_cached_triplet2arch = None
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def _triplettable():
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global _cached_arch2triplet, _cached_triplet2arch
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if _cached_arch2triplet is None or _cached_triplet2arch is None:
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table = _load_table('/usr/share/dpkg/triplettable')
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arch2triplet = {}
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triplet2arch = {}
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for row in table:
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if '<cpu>' in row[0] or '<cpu>' in row[1]:
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for cpu in _cputable():
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replaced_row = [ column.replace('<cpu>', cpu[0]) for column in row ]
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arch2triplet[replaced_row[1]] = replaced_row[0]
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triplet2arch[replaced_row[0]] = replaced_row[1]
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else:
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arch2triplet[row[1]] = row[0]
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triplet2arch[row[0]] = row[1]
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_cached_arch2triplet = arch2triplet
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_cached_triplet2arch = triplet2arch
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return _cached_triplet2arch, _cached_arch2triplet
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class InvalidArchitecture(Exception):
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pass
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def Debian_arch_to_Debian_triplet(arch):
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parts = arch.split('-')
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# Handle architecture wildcards
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if 'any' in parts:
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if len(parts) == 3:
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return parts
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elif len(parts) == 2:
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return 'any', parts[0], parts[1]
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else:
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return 'any', 'any', 'any'
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if len(parts) == 2 and parts[0] == 'linux':
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arch = parts[1]
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triplet = _triplettable()[1].get(arch, None)
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if triplet is None:
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return None
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return triplet.split('-', 2)
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def match_architecture(arch, wildcard):
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# 'all' has no valid triplet
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if arch == 'all' or wildcard == 'all':
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return arch == wildcard
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if wildcard is 'any' or arch == wildcard:
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return True
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triplet_arch = Debian_arch_to_Debian_triplet(arch)
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triplet_wildcard = Debian_arch_to_Debian_triplet(wildcard)
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if triplet_arch is None or len(triplet_arch) != 3:
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raise InvalidArchitecture('{0} is not a valid architecture name'.format(arch))
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if triplet_wildcard is None or len(triplet_wildcard) != 3:
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raise InvalidArchitecture('{0} is not a valid architecture name or wildcard'.format(wildcard))
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for i in range(0,3):
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if triplet_arch[i] != triplet_wildcard[i] and triplet_wildcard[i] != 'any':
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return False
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return True
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