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# Copyright (C) 2007 Brendan Cully <brendan@kublai.com> |
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# This file is published under the GNU GPL. |
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'''allow user-defined command aliases |
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To use, create entries in your hgrc of the form |
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[alias] |
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mycmd = cmd --args |
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''' |
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from mercurial.cmdutil import findcmd, UnknownCommand, AmbiguousCommand |
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from mercurial import commands |
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cmdtable = {} |
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class RecursiveCommand(Exception): pass |
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class lazycommand(object): |
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'''defer command lookup until needed, so that extensions loaded |
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after alias can be aliased''' |
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def __init__(self, ui, name, target): |
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self._ui = ui |
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self._name = name |
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self._target = target |
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self._cmd = None |
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def __len__(self): |
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self._resolve() |
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return len(self._cmd) |
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def __getitem__(self, key): |
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self._resolve() |
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return self._cmd[key] |
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def __iter__(self): |
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self._resolve() |
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return self._cmd.__iter__() |
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def _resolve(self): |
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if self._cmd is not None: |
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return |
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try: |
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self._loading = True |
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self._cmd = findcmd(self._ui, self._target)[1] |
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if self._cmd == self: |
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raise RecursiveCommand() |
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if self._target in commands.norepo.split(' '): |
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commands.norepo += ' %s' % self._name |
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return |
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except UnknownCommand: |
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msg = '*** [alias] %s: command %s is unknown' % \ |
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(self._name, self._target) |
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except AmbiguousCommand: |
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msg = '*** [alias] %s: command %s is ambiguous' % \ |
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(self._name, self._target) |
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except RecursiveCommand: |
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msg = '*** [alias] %s: circular dependency on %s' % \ |
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(self._name, self._target) |
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def nocmd(*args, **opts): |
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self._ui.warn(msg + '\n') |
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return 1 |
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nocmd.__doc__ = msg |
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self._cmd = (nocmd, [], '') |
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commands.norepo += ' %s' % self._name |
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def uisetup(ui): |
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for cmd, target in ui.configitems('alias'): |
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if not target: |
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ui.warn('*** [alias] %s: no definition\n' % cmd) |
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continue |
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args = target.split(' ') |
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tcmd = args.pop(0) |
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if args: |
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pui = ui.parentui or ui |
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pui.setconfig('defaults', cmd, ' '.join(args)) |
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cmdtable[cmd] = lazycommand(ui, cmd, tcmd) |