view mercurial/peer.py @ 20837:191a0ae37767

grep: use "found" instead of "filerevmatches" examination for efficiency

Before this patch, internal function "display()" of "hg grep" stores
whether matching is already found or not into the dictionary
"filerevmatches" by "(fn, rev)" tuple as the key.

But this is redundant, because:

  - "filerevmatches" is local variable of "display()", so each
    "display()" invocations don't affect others

  - both "fn" and "rev" (gotten from "ctx" argument) are never changed
    in each "display()" invocations

Then, "filerevmatches" should have only one entry at most, and "(fn,
rev) in filerevmatches" should be equal to "found".

This patch uses "found" instead of "filerevmatches" examination for
efficiency.

# peer.py - repository base classes for mercurial
#
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
# Copyright 2006 Vadim Gelfer <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from i18n import _
import error

class peerrepository(object):

    def capable(self, name):
        '''tell whether repo supports named capability.
        return False if not supported.
        if boolean capability, return True.
        if string capability, return string.'''
        caps = self._capabilities()
        if name in caps:
            return True
        name_eq = name + '='
        for cap in caps:
            if cap.startswith(name_eq):
                return cap[len(name_eq):]
        return False

    def requirecap(self, name, purpose):
        '''raise an exception if the given capability is not present'''
        if not self.capable(name):
            raise error.CapabilityError(
                _('cannot %s; remote repository does not '
                  'support the %r capability') % (purpose, name))

    def local(self):
        '''return peer as a localrepo, or None'''
        return None

    def peer(self):
        return self

    def canpush(self):
        return True

    def close(self):
        pass