view contrib/convert-repo @ 20074:5fc2ae1c631b

strip: add faster revlog strip computation

The previous revlog strip computation would walk every rev in the revlog, from
the bottom to the top.  Since we're usually stripping only the top few revs of
the revlog, this was needlessly expensive on large repos.

The new algorithm walks the exact number of revs that will be stripped, thus
making the operation not dependent on the number of revs in the repo.

This makes amend on a large repo go from 8.7 seconds to 6 seconds.

#!/usr/bin/env python
#
# Wrapper script around the convert.py hgext extension
# for foreign SCM conversion to mercurial format.
#

import sys
from mercurial import ui, fancyopts
from hgext import convert

# Options extracted from the cmdtable
func, options, help = convert.cmdtable['convert']

# An ui instance
u = ui.ui()

opts = {}
args = []
try:
    args = list(fancyopts.fancyopts(sys.argv[1:], options, opts))
    args += [None]*(3 - len(args))
    src, dest, revmapfile = args
except (fancyopts.getopt.GetoptError, ValueError), inst:
    u.warn('Usage:\n%s\n' % help)
    sys.exit(-1)

convert.convert(u, src, dest, revmapfile, **opts)