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101 lines
3.2 KiB
Python
101 lines
3.2 KiB
Python
"""architecture matching
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@copyright: 2014, Ansgar Burchardt <ansgar@debian.org>
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@copyright: 2014, Johannes Schauer <j.schauer@email.de>
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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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_cached_arch2triplet = None
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_cached_triplet2arch = None
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_cached_cputable = None
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def _load_table(path):
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table = []
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with open(path, "r") as f:
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for line in f:
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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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def _read_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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def _read_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 = dict()
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triplet2arch = dict()
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for row in table:
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debtriplet = row[0]
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debarch = row[1]
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if '<cpu>' in debtriplet:
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for r in _read_cputable():
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cpu = r[0]
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dt = debtriplet.replace('<cpu>', cpu)
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da = debarch.replace('<cpu>', cpu)
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arch2triplet[da] = dt
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triplet2arch[dt] = da
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else:
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arch2triplet[debarch] = debtriplet
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triplet2arch[debtriplet] = debarch
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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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def debwildcard_to_debtriplet(arch):
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arch_tuple = arch.split('-', 2)
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if 'any' in arch_tuple:
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if len(arch_tuple) == 3:
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return arch_tuple
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elif len(arch_tuple) == 2:
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return ('any', arch_tuple[0], arch_tuple[1])
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else:
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return ('any', 'any', 'any')
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else:
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return debarch_to_debtriplet(arch)
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def debarch_to_debtriplet(arch):
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if (arch.startswith("linux-")):
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arch = arch[6:]
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triplet = _read_triplettable()[1].get(arch)
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if triplet is None:
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return
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return triplet.split('-', 2)
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def match_architecture(real, alias):
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if alias == real or alias == "any":
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return True
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real = debarch_to_debtriplet(real)
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alias = debwildcard_to_debtriplet(alias)
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if real is None or len(real) != 3 or alias is None or len(alias) != 3:
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return False
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for i in range(0,3):
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if (alias[i] != real[i] and alias[i] != "any"):
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return False
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return True
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