util: make atomictempfile avoid ambiguity of file stat if needed
Ambiguity check is executed at close(), only if:
- atomictempfile is created with checkambig=True, and
- target file exists before renaming
This restriction avoids performance decrement by needless examination
of file stat (for example, filelog doesn't need exact cache
validation, even though it uses atomictempfile to write changes out).
See description of filestat class for detail about why the logic in
this patch works as expected.
This patch is a part of preparation for "Exact Cache Validation Plan":
https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan
from __future__ import absolute_import
import _winreg
import os
from . import (
osutil,
util,
)
def systemrcpath():
'''return default os-specific hgrc search path'''
rcpath = []
filename = util.executablepath()
# Use mercurial.ini found in directory with hg.exe
progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini')
rcpath.append(progrc)
# Use hgrc.d found in directory with hg.exe
progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d')
if os.path.isdir(progrcd):
for f, kind in osutil.listdir(progrcd):
if f.endswith('.rc'):
rcpath.append(os.path.join(progrcd, f))
# else look for a system rcpath in the registry
value = util.lookupreg('SOFTWARE\\Mercurial', None,
_winreg.HKEY_LOCAL_MACHINE)
if not isinstance(value, str) or not value:
return rcpath
value = util.localpath(value)
for p in value.split(os.pathsep):
if p.lower().endswith('mercurial.ini'):
rcpath.append(p)
elif os.path.isdir(p):
for f, kind in osutil.listdir(p):
if f.endswith('.rc'):
rcpath.append(os.path.join(p, f))
return rcpath
def userrcpath():
'''return os-specific hgrc search path to the user dir'''
home = os.path.expanduser('~')
path = [os.path.join(home, 'mercurial.ini'),
os.path.join(home, '.hgrc')]
userprofile = os.environ.get('USERPROFILE')
if userprofile and userprofile != home:
path.append(os.path.join(userprofile, 'mercurial.ini'))
path.append(os.path.join(userprofile, '.hgrc'))
return path