tags: implement persistent tag caching (issue548).
- rename findglobaltags() to findglobaltags1() (so the "no cache"
implementation is still there if we need it)
- add findglobaltags2() and make findglobaltags() an alias for it
(disabling tag caching is a one-line patch)
- factor out tagcache class with methods readcache() and writecache();
the expensive part of tag finding (iterate over heads and find
.hgtags filenode) is now in tagcache.readcache()
# strutil.py - string utilities for Mercurial
#
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
def findall(haystack, needle, start=0, end=None):
if end is None:
end = len(haystack)
if end < 0:
end += len(haystack)
if start < 0:
start += len(haystack)
while start < end:
c = haystack.find(needle, start, end)
if c == -1:
break
yield c
start = c + 1
def rfindall(haystack, needle, start=0, end=None):
if end is None:
end = len(haystack)
if end < 0:
end += len(haystack)
if start < 0:
start += len(haystack)
while end >= 0:
c = haystack.rfind(needle, start, end)
if c == -1:
break
yield c
end = c - 1