Mercurial > hg
view mercurial/txnutil.py @ 49373:f8ec7b16c98f stable
rust: add message to `DirstateV2ParseError` to give some context
This is useful when debugging.
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 18 May 2022 09:50:39 +0100 |
parents | 2e726c934fcd |
children | f4733654f144 |
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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 . import encoding def mayhavepending(root): """return whether 'root' may have pending changes, which are visible to this process. """ return root == encoding.environ.get(b'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(b'%s.pending' % filename, **kwargs), True) except FileNotFoundError: pass return (vfs(filename, **kwargs), False)