Mercurial > hg
view mercurial/txnutil.py @ 41046:f5ec93f69171
exthelper: drop fileset/revset/template support for now
Yuya raised concerns about duplicating registrar functionality. There are a
couple of ideas to work around this, which would allow bringing them back, and
then backporting to evolve. For now, I just want to get the subsequent changes
landed before the bulk b'' rewrite makes rebasing too hard.
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Sat, 22 Dec 2018 22:44:24 -0500 |
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)