Source code for daklib.architecture
"""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
import errno
[docs]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
[docs]def _cputable():
global _cached_cputable
if _cached_cputable is None:
_cached_cputable = _load_table("/usr/share/dpkg/cputable")
return _cached_cputable
_cached_arch2tuple = None
_cached_tuple2arch = None
[docs]def _tupletable():
global _cached_arch2tuple, _cached_tuple2arch
if _cached_arch2tuple is None or _cached_tuple2arch is None:
try:
tripletable = False
table = _load_table("/usr/share/dpkg/tupletable")
except OSError as e:
if e.errno != errno.ENOENT:
raise
tripletable = True
table = _load_table("/usr/share/dpkg/triplettable")
arch2tuple = {}
tuple2arch = {}
def add_tuple(tuple, arch):
if tripletable:
tuple = "base-{}".format(tuple)
arch2tuple[arch] = tuple
tuple2arch[tuple] = arch
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]
add_tuple(replaced_row[0], replaced_row[1])
else:
add_tuple(row[0], row[1])
_cached_arch2tuple = arch2tuple
_cached_tuple2arch = tuple2arch
return _cached_tuple2arch, _cached_arch2tuple
[docs]class InvalidArchitecture(Exception):
pass
[docs]def Debian_arch_to_Debian_tuple(arch: str):
parts = arch.split("-")
# Handle architecture wildcards
if "any" in parts:
if len(parts) == 4:
return parts
elif len(parts) == 3:
return "any", parts[0], parts[1], parts[2]
elif len(parts) == 2:
return "any", "any", parts[0], parts[1]
else:
return "any", "any", "any", "any"
if len(parts) == 2 and parts[0] == "linux":
arch = parts[1]
tuple = _tupletable()[1].get(arch, None)
if tuple is None:
return None
return tuple.split("-", 3)
[docs]def match_architecture(arch: str, wildcard: str) -> bool:
# 'all' has no valid tuple
if arch == "all" or wildcard == "all":
return arch == wildcard
if wildcard == "any" or arch == wildcard:
return True
tuple_arch = Debian_arch_to_Debian_tuple(arch)
tuple_wildcard = Debian_arch_to_Debian_tuple(wildcard)
if tuple_arch is None or len(tuple_arch) != 4:
raise InvalidArchitecture("{0} is not a valid architecture name".format(arch))
if tuple_wildcard is None or len(tuple_wildcard) != 4:
raise InvalidArchitecture(
"{0} is not a valid architecture name or wildcard".format(wildcard)
)
for i in range(0, 4):
if tuple_arch[i] != tuple_wildcard[i] and tuple_wildcard[i] != "any":
return False
return True