Mercurial > hg
view mercurial/txnutil.py @ 39244:73cf21b2e8a6
manifest: add getstorage() to manifestlog and use it globally
It is a common pattern to obtain a directory manifest storage instance
(a manifestrevlog) by going through manifestlog._revlog.dirlog().
Why access to storage and caching of other manifests is done through
manifestrevlog instead of manifestlog, I don't know.
This commit establishes a getstorage(tree) API on manifestlog and
imanifestlog that provides a public API for accessing manifest storage.
All consumers previously using private attributes have been updated
to use this new method.
.. api:: manifestlog now has a getstorage(tree) method
It should be used for obtaining an object representing the
manifest's storage implementation. Accessing
manifestlog._revlog should be avoided.
Differential Revision: https://phab.mercurial-scm.org/D4277
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 10 Aug 2018 15:01:06 -0700 |
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)