Mercurial > hg
view mercurial/txnutil.py @ 32823:cb48dfd9672d
bisect: simpler approach for option validation message
Yuya Nishihara gave this suggestion on the mailing list after the
previous patch was queued, and honestly this seems much simpler and
looks more efficient.
author | Brandon McCaig <bamccaig@gmail.com> |
---|---|
date | Wed, 14 Jun 2017 01:43:47 -0400 |
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)