Mercurial > hg
view mercurial/txnutil.py @ 34299:b1d4ac068961
blackbox: do not prevent 'chg init' from working
Previously, blackbox always appends to blackbox.log and creates the
directory for that file on demand. That could be an issue if:
1. chg starts from `$REPO` directory, so `ui._bbrepo` is set.
2. `rm -rf $REPO`.
3. `chg init $REPO`, blackbox writes something and `init` will fail
because `$REPO` directory is non-empty.
This patch fixes that by verifying whether vfs exists before re-using it.
Differential Revision: https://phab.mercurial-scm.org/D768
author | Jun Wu <quark@fb.com> |
---|---|
date | Thu, 21 Sep 2017 11:03:37 -0700 |
parents | 206532700213 |
children | 2372284d9457 |
line wrap: on
line source
# 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)