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annotate mercurial/repo.py @ 5259:65dc707606ed

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Push capability checking into protocol-level code.
author Bryan O'Sullivan <bos@serpentine.com>
date Mon, 27 Aug 2007 14:48:08 -0700
parents 63b9d2deed48
children 08d6e8754388
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1 # repo.py - repository base classes for mercurial
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2 #
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3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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4 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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5 #
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6 # This software may be used and distributed according to the terms
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7 # of the GNU General Public License, incorporated herein by reference.
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9 class RepoError(Exception):
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10 pass
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11
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12 class NoCapability(RepoError):
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13 pass
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15 class repository(object):
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16 def capable(self, name):
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17 '''tell whether repo supports named capability.
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18 return False if not supported.
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19 if boolean capability, return True.
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20 if string capability, return string.'''
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21 if name in self.capabilities:
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22 return True
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23 name_eq = name + '='
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24 for cap in self.capabilities:
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25 if cap.startswith(name_eq):
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26 return cap[len(name_eq):]
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27 return False
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29 def requirecap(self, name, purpose):
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30 '''raise an exception if the given capability is not present'''
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31 if not self.capable(name):
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32 raise NoCapability(_('cannot %s; remote repository does not '
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33 'support the %r capability') %
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34 (purpose, name))