view contrib/convert-repo @ 17952:54cedee86e51 stable

commit: increase perf by avoiding checks against entire repo subsets

When commiting to a repo with lots of history (>400000 changesets)
checking the results of revset.py:descendants against the subset takes
some time.  Since the subset equals the entire changelog, the check
isn't necessary.  Avoiding it in that case saves 0.1 seconds off of
a 1.78 second commit. A 6% gain.

We use the length of the subset to determine if it is the entire repo.
There is precedence for this in revset.py:stringset.

#!/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)