##// END OF EJS Templates
branchmap: avoid ancestor computations in absence of non-continous branches...
branchmap: avoid ancestor computations in absence of non-continous branches The branchhead computation is one of the more heavy operations for bigger repositories as it has to scan all changesets and potentially involves the expensive computation of the ancestor sets. Redo the computation to handle the common cases directly and use tighter conditions for when the ancestor scan is necessary. Most importantly, avoid it completely if the non-continous branches are processed in one update as seen in the initial computation after a clone. For the Mercurial repository, it gives a small 2-3% performance boost. For the NetBSD test repository, it cuts the time in half. Differential Revision: https://phab.mercurial-scm.org/D9631

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scmwindows.py
113 lines | 3.4 KiB | text/x-python | PythonLexer
from __future__ import absolute_import
import os
from . import (
encoding,
pycompat,
util,
win32,
)
try:
import _winreg as winreg # pytype: disable=import-error
winreg.CloseKey
except ImportError:
# py2 only
import winreg # pytype: disable=import-error
# MS-DOS 'more' is the only pager available by default on Windows.
fallbackpager = b'more'
def systemrcpath():
'''return default os-specific hgrc search path'''
rcpath = []
filename = win32.executablepath()
# Use mercurial.ini found in directory with hg.exe
progrc = os.path.join(os.path.dirname(filename), b'mercurial.ini')
rcpath.append(progrc)
def _processdir(progrcd):
if os.path.isdir(progrcd):
for f, kind in sorted(util.listdir(progrcd)):
if f.endswith(b'.rc'):
rcpath.append(os.path.join(progrcd, f))
# Use hgrc.d found in directory with hg.exe
_processdir(os.path.join(os.path.dirname(filename), b'hgrc.d'))
# treat a PROGRAMDATA directory as equivalent to /etc/mercurial
programdata = encoding.environ.get(b'PROGRAMDATA')
if programdata:
programdata = os.path.join(programdata, b'Mercurial')
_processdir(os.path.join(programdata, b'hgrc.d'))
ini = os.path.join(programdata, b'mercurial.ini')
if os.path.isfile(ini):
rcpath.append(ini)
ini = os.path.join(programdata, b'hgrc')
if os.path.isfile(ini):
rcpath.append(ini)
# next look for a system rcpath in the registry
value = util.lookupreg(
b'SOFTWARE\\Mercurial', None, winreg.HKEY_LOCAL_MACHINE
)
if value and isinstance(value, bytes):
value = util.localpath(value)
for p in value.split(pycompat.ospathsep):
if p.lower().endswith(b'mercurial.ini'):
rcpath.append(p)
else:
_processdir(p)
return rcpath
def userrcpath():
'''return os-specific hgrc search path to the user dir'''
home = _legacy_expanduser(b'~')
path = [os.path.join(home, b'mercurial.ini'), os.path.join(home, b'.hgrc')]
userprofile = encoding.environ.get(b'USERPROFILE')
if userprofile and userprofile != home:
path.append(os.path.join(userprofile, b'mercurial.ini'))
path.append(os.path.join(userprofile, b'.hgrc'))
return path
def _legacy_expanduser(path):
"""Expand ~ and ~user constructs in the pre 3.8 style"""
# Python 3.8+ changed the expansion of '~' from HOME to USERPROFILE. See
# https://bugs.python.org/issue36264. It also seems to capitalize the drive
# letter, as though it was processed through os.path.realpath().
if not path.startswith(b'~'):
return path
i, n = 1, len(path)
while i < n and path[i] not in b'\\/':
i += 1
if b'HOME' in encoding.environ:
userhome = encoding.environ[b'HOME']
elif b'USERPROFILE' in encoding.environ:
userhome = encoding.environ[b'USERPROFILE']
elif b'HOMEPATH' not in encoding.environ:
return path
else:
try:
drive = encoding.environ[b'HOMEDRIVE']
except KeyError:
drive = b''
userhome = os.path.join(drive, encoding.environ[b'HOMEPATH'])
if i != 1: # ~user
userhome = os.path.join(os.path.dirname(userhome), path[1:i])
return userhome + path[i:]
def termsize(ui):
return win32.termsize()