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ui: check for progress singleton when clearing progress bar (issue5684)...
ui: check for progress singleton when clearing progress bar (issue5684) A combination of wrapping `ui` and progress bars interrupted by exceptions can lead to the progress bar not being cleared when the exception error is printed. This results in corrupted-looking output like this: ``` updating [===============================> ] 1/2u nresolved conflicts (see hg resolve, then hg rebase --continue) ``` This is because in `ui._progclear`, we only check the local reference to the progress bar, not whether or not there is an instance of the singleton. When a progress bar is interrupted by an exception, the exception printing in `scmutil.callcatch` uses the original instance of the `ui` object, not the wrapped copy that has `_progbar` set. When consider whether or not to clear the progress bar, check for the existence of the singleton, rather than just whether or not we have a local reference to it. Differential Revision: https://phab.mercurial-scm.org/D743

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amend.py
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# amend.py - provide the amend command
#
# Copyright 2017 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""provide the amend command (EXPERIMENTAL)
This extension provides an ``amend`` command that is similar to
``commit --amend`` but does not prompt an editor.
"""
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import (
cmdutil,
commands,
registrar,
)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'
cmdtable = {}
command = registrar.command(cmdtable)
@command('amend',
[('A', 'addremove', None,
_('mark new/missing files as added/removed before committing')),
('e', 'edit', None, _('invoke editor on commit messages')),
('i', 'interactive', None, _('use interactive mode')),
] + cmdutil.walkopts + cmdutil.commitopts + cmdutil.commitopts2,
_('[OPTION]... [FILE]...'),
inferrepo=True)
def amend(ui, repo, *pats, **opts):
"""amend the working copy parent with all or specified outstanding changes
Similar to :hg:`commit --amend`, but reuse the commit message without
invoking editor, unless ``--edit`` was set.
See :hg:`help commit` for more details.
"""
with repo.wlock(), repo.lock():
if not opts.get('logfile'):
opts['message'] = opts.get('message') or repo['.'].description()
opts['amend'] = True
return commands._docommit(ui, repo, *pats, **opts)