Mercurial > hg
view mercurial/txnutil.py @ 35910:b82c6dd15f5d
cmdutil: introduce deprecated aliases
c8e2d6ed1f9e moved some objects used by Evolve and hence broke the latest
Evolve revision. Next Evolve version will use the new objects when available
but introduce deprecated aliases so users using older version of Evolve won't
have a broken Evolve extension.
Differential Revision: https://phab.mercurial-scm.org/D2023
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Sun, 04 Feb 2018 12:00:17 +0100 |
parents | 206532700213 |
children | 2372284d9457 |
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# 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)