match: teach diffmatcher.visitdir() to return 'all' if possible This patch teaches differencematcher.visitdir() to return 'all' when m1.visitdir() returns 'all' and m2 does not matches. Before this patch, from a differencematcher.visitdir(), we always returned either True or False. We never returned 'all' even when we can. This causes problem when m1 and m2 of a differencematcher are themselves differencematcher. In that case, we try to check: `if self._m2_.visitdir(dir) == 'all'` which will never be 'all' even though it can be. This leads to iterating over a lot of sub-directory manifest, even though we don't want to while extending a narrow clone. I am yet to measure the impact of this but calculating manifest was taking ~50-60 seconds, so this should definitely save some of time there. Differential Revision: https://phab.mercurial-scm.org/D5814

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#!/usr/bin/env python

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#

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# An example hgweb CGI script, edit as necessary

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# See also https://mercurial-scm.org/wiki/PublishingRepositories

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# Path to repo or hgweb config to serve (see 'hg help hgweb')

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config = "/path/to/repo/or/config"

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# Uncomment and adjust if Mercurial is not installed system-wide

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# (consult "installed modules" path from 'hg debuginstall'):

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#import sys; sys.path.insert(0, "/path/to/python/lib")

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# Uncomment to send python tracebacks to the browser if an error occurs:

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#import cgitb; cgitb.enable()

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from mercurial import demandimport; demandimport.enable()

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from mercurial.hgweb import hgweb, wsgicgi

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application = hgweb(config)

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wsgicgi.launch(application)