Mercurial > hg > mercurial-crew-with-dirclash
view hgext/alias.py @ 5369:7530334bf301
revlog: generate trivial deltas against null revision
To avoid extra memory usage and performance issues with large files,
generate a trivial delta header for deltas against the null revision
rather than calling the usual delta generator.
We append the delta header to meta rather than prepending it to data
to avoid a large allocate and copy.
author | Matt Mackall <mpm@selenic.com> |
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date | Wed, 03 Oct 2007 17:17:27 -0500 |
parents | 18a9fbb5cd78 |
children |
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# Copyright (C) 2007 Brendan Cully <brendan@kublai.com> # This file is published under the GNU GPL. '''allow user-defined command aliases To use, create entries in your hgrc of the form [alias] mycmd = cmd --args ''' from mercurial.cmdutil import findcmd, UnknownCommand, AmbiguousCommand from mercurial import commands cmdtable = {} class RecursiveCommand(Exception): pass class lazycommand(object): '''defer command lookup until needed, so that extensions loaded after alias can be aliased''' def __init__(self, ui, name, target): self._ui = ui self._name = name self._target = target self._cmd = None def __len__(self): self._resolve() return len(self._cmd) def __getitem__(self, key): self._resolve() return self._cmd[key] def __iter__(self): self._resolve() return self._cmd.__iter__() def _resolve(self): if self._cmd is not None: return try: self._cmd = findcmd(self._ui, self._target, commands.table)[1] if self._cmd == self: raise RecursiveCommand() if self._target in commands.norepo.split(' '): commands.norepo += ' %s' % self._name return except UnknownCommand: msg = '*** [alias] %s: command %s is unknown' % \ (self._name, self._target) except AmbiguousCommand: msg = '*** [alias] %s: command %s is ambiguous' % \ (self._name, self._target) except RecursiveCommand: msg = '*** [alias] %s: circular dependency on %s' % \ (self._name, self._target) def nocmd(*args, **opts): self._ui.warn(msg + '\n') return 1 nocmd.__doc__ = msg self._cmd = (nocmd, [], '') commands.norepo += ' %s' % self._name def uisetup(ui): for cmd, target in ui.configitems('alias'): if not target: ui.warn('*** [alias] %s: no definition\n' % cmd) continue args = target.split(' ') tcmd = args.pop(0) if args: ui.setconfig('defaults', cmd, ' '.join(args)) cmdtable[cmd] = lazycommand(ui, cmd, tcmd)