Mercurial > hg
view mercurial/txnutil.py @ 38611:0ba4cf3f088f
match: add prefixdirmatcher to adapt subrepo matcher back
This serves as an inverse function to the subdirmatcher, and will be used
to wrap a fileset matcher of subrepositories. One of the root/prefix paths
could be deduced from the matcher attributes to be wrapped, but we don't
since the callers of this class know the root/prefix paths and can simply
pass them in.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sat, 09 Jun 2018 22:04:07 +0900 |
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)