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7f02e97a65
This lets us prevent interrupts by default, and only allow them for the few commands we know are safe.
77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
# nointerrupt.py - prevent mercurial from being ctrl-c'ed
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#
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# Copyright 2016 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""warns but doesn't exit when the user first hits Ctrl+C
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This extension shows a warning the first time a user hits Ctrl+C saying the
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repository could end up in a bad state. If the user hits Ctrl+C a second time,
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hg will exit as usual.
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By default, this behavior only applies to commands that are explicitly
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whitelisted for it. To whitelist a command (say, "commit"), use:
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[nointerrupt]
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attend-commit = true
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To change the default behavior to have all commands instrumented, set config
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option ``nointerrupt.default-attend`` to true, then use the same logic to
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disable it for commands where it's not wanted - for instance, for "log":
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[nointerrupt]
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default-attend = true
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attend-log = false
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Finally, to customize the message shown on the first Ctrl+C, set it in
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config option ``nointerrupt.message``.
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"""
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import sys, signal
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from mercurial import cmdutil, commands, dispatch, extensions
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def sigintprintwarninghandlerfactory(oldsiginthandler, msg):
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def sigint(*args):
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sys.stderr.write(msg)
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signal.signal(signal.SIGINT, oldsiginthandler)
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return sigint
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def nointerruptcmd(orig, ui, options, cmd, cmdfunc):
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# bail if not in interactive terminal
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if ui.configbool('nointerrupt', 'interactiveonly', True):
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if not ui.fout.isatty() or ui.plain():
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return orig(ui, options, cmd, cmdfunc)
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cmds, _cmdtableentry = cmdutil.findcmd(cmd, commands.table)
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if isinstance(_cmdtableentry[0], dispatch.cmdalias):
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cmds.append(_cmdtableentry[0].cmdname)
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shouldpreventinterrupt = ui.configbool(
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'nointerrupt', 'default-attend', False)
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for cmd in cmds:
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var = 'attend-%s' % cmd
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if ui.config('nointerrupt', var):
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shouldpreventinterrupt = ui.configbool('nointerrupt', var)
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break
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if shouldpreventinterrupt:
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oldsiginthandler = signal.getsignal(signal.SIGINT)
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try:
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msg = ui.config('nointerrupt', 'message',
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"==========================\n"
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"Interrupting Mercurial may leave your repo in a bad state.\n"
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"If you really want to interrupt your current command, press\n"
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"CTRL-C again.\n"
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"==========================\n"
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)
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signal.signal(signal.SIGINT, sigintprintwarninghandlerfactory(
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oldsiginthandler, msg))
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except AttributeError:
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pass
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return orig(ui, options, cmd, cmdfunc)
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def uisetup(ui):
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extensions.wrapfunction(dispatch, '_runcommand', nointerruptcmd)
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