Mercurial > hg
view mercurial/txnutil.py @ 42970:1ad3ebb39c61
merge: replace magic strings with NAMED_CONSTANTS (API)
.. api::
`mercurial.hg.update*` and `mercurial.merge.update` now expect a value
from a set of NAMED_CONSTANTS (`merge.UPDATECHECK_*` constants)
rather than a collection of magic strings. As of now, the values
are the same, but code should be prepared for these values to
change in the future.
Differential Revision: https://phab.mercurial-scm.org/D6877
author | Augie Fackler <augie@google.com> |
---|---|
date | Wed, 25 Sep 2019 10:53:10 -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)