mirror of
https://github.com/openvswitch/ovs
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d4cd4d301b
Perl is unfashionable and Python is more widely available and understood, so this commit converts one of the OVS uses of Perl into Python. Signed-off-by: Ben Pfaff <blp@ovn.org> Acked-by: Aaron Conole <aconole@redhat.com>
86 lines
1.9 KiB
Python
Executable File
86 lines
1.9 KiB
Python
Executable File
#! /usr/bin/env python
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# Breaks lines read from stdin into groups using blank lines as
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# group separators, then sorts lines within the groups for
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# reproducibility.
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import re
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import sys
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# This is copied out of the Python Sorting HOWTO at
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# https://docs.python.org/3/howto/sorting.html#sortinghowto
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def cmp_to_key(mycmp):
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'Convert a cmp= function into a key= function'
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class K(object):
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def __init__(self, obj, *args):
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self.obj = obj
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def __lt__(self, other):
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return mycmp(self.obj, other.obj) < 0
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def __gt__(self, other):
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return mycmp(self.obj, other.obj) > 0
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def __eq__(self, other):
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return mycmp(self.obj, other.obj) == 0
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def __le__(self, other):
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return mycmp(self.obj, other.obj) <= 0
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def __ge__(self, other):
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return mycmp(self.obj, other.obj) >= 0
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def __ne__(self, other):
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return mycmp(self.obj, other.obj) != 0
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return K
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u = '[0-9a-fA-F]'
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uuid_re = re.compile(r'%s{8}-%s{4}-%s{4}-%s{4}-%s{12}' % ((u,) * 5))
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def cmp(a, b):
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return (a > b) - (a < b)
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def compare_lines(a, b):
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if uuid_re.match(a):
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if uuid_re.match(b):
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return cmp(a[36:], b[36:])
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else:
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return 1
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elif uuid_re.match(b):
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return -1
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else:
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return cmp(a, b)
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def output_group(group, dst):
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for x in sorted(group, key=cmp_to_key(compare_lines)):
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dst.write(x)
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def ovsdb_monitor_sort(src, dst):
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group = []
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while True:
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line = src.readline()
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if not line:
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break
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if line.rstrip() == '':
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output_group(group, dst)
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group = []
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dst.write(line)
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elif line.startswith(',') and group:
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group[len(group) - 1] += line
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else:
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group.append(line)
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if group:
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output_group(group, dst)
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if __name__ == '__main__':
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ovsdb_monitor_sort(sys.stdin, sys.stdout)
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