hg

dirstate: call the C implementation of nonnonormalentries when available

Before this patch, we were using python code for computing the nonnormal
dirstate entries. This patch makes us use the C implementation of the function
when it is available.

Using the nonnormal set in hgwatchman improves hg status performance. Below
are the numbers for mozilla-central.

with the changes:
$ hg perfstatus
    ! wall 0.010632 comb 0.000000 user 0.000000 sys 0.000000 (best of 246)

without the changes:
$ hg perfstatus
    ! wall 0.036442 comb 0.030000 user 0.030000 sys 0.000000 (best of 100)

On mozilla-central the improvement to hg status is ~20% (0.25s to 0.2s),
on our big repos at Facebook, the win is ~40% (1.2s to 0.72s).

#!/usr/bin/env python
#
# mercurial - scalable distributed SCM
#
# Copyright 2005-2007 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
import sys

if os.environ.get('HGUNICODEPEDANTRY', False):
    reload(sys)
    sys.setdefaultencoding("undefined")


libdir = '@LIBDIR@'

if libdir != '@' 'LIBDIR' '@':
    if not os.path.isabs(libdir):
        libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                              libdir)
        libdir = os.path.abspath(libdir)
    sys.path.insert(0, libdir)

# enable importing on demand to reduce startup time
try:
    from mercurial import demandimport; demandimport.enable()
except ImportError:
    import sys
    sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
                     ' '.join(sys.path))
    sys.stderr.write("(check your install and PYTHONPATH)\n")
    sys.exit(-1)

import mercurial.util
import mercurial.dispatch

for fp in (sys.stdin, sys.stdout, sys.stderr):
    mercurial.util.setbinary(fp)

mercurial.dispatch.run()