##// END OF EJS Templates
contrib: simplify the genosxversion.py command to find the hg libraries...
contrib: simplify the genosxversion.py command to find the hg libraries I forget what problem I ran into while trying to teach the makefile to use a non-system python. (It might have ben missing hg-evolve and/or keyring, but `check_output()` was raising an error.) This still isn't great because it will return non zero for something like the username not being set, even though we aren't asking for it. But I suppose it's still useful to simplify. Differential Revision: https://phab.mercurial-scm.org/D6753

File last commit:

r31050:20653270 default
r43080:197e7326 default
Show More
txnutil.py
36 lines | 1.0 KiB | text/x-python | PythonLexer
# txnutil.py - transaction related utilities
#
# Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import errno
from . import (
encoding,
)
def mayhavepending(root):
'''return whether 'root' may have pending changes, which are
visible to this process.
'''
return root == encoding.environ.get('HG_PENDING')
def trypending(root, vfs, filename, **kwargs):
'''Open file to be read according to HG_PENDING environment variable
This opens '.pending' of specified 'filename' only when HG_PENDING
is equal to 'root'.
This returns '(fp, is_pending_opened)' tuple.
'''
if mayhavepending(root):
try:
return (vfs('%s.pending' % filename, **kwargs), True)
except IOError as inst:
if inst.errno != errno.ENOENT:
raise
return (vfs(filename, **kwargs), False)