branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
# pager.py - display output using a pager
#
# Copyright 2008 David Soria Parra <dsp@php.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
#
# To load the extension, add it to your configuration file:
#
# [extension]
# pager =
#
# Run 'hg help pager' to get info on configuration.
'''browse command output with an external pager (DEPRECATED)
Forcibly enable paging for individual commands that don't typically
request pagination with the attend-<command> option. This setting
takes precedence over ignore options and defaults::
[pager]
attend-cat = false
'''
from mercurial import (
cmdutil,
commands,
dispatch,
extensions,
registrar,
)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'
configtable = {}
configitem = registrar.configitem(configtable)
configitem(
b'pager',
b'attend',
default=lambda: attended,
)
def uisetup(ui):
def pagecmd(orig, ui, options, cmd, cmdfunc):
auto = options[b'pager'] == b'auto'
if auto and not ui.pageractive:
usepager = False
attend = ui.configlist(b'pager', b'attend')
ignore = ui.configlist(b'pager', b'ignore')
cmds, _ = cmdutil.findcmd(cmd, commands.table)
for cmd in cmds:
var = b'attend-%s' % cmd
if ui.config(b'pager', var, None):
usepager = ui.configbool(b'pager', var, True)
break
if cmd in attend or (cmd not in ignore and not attend):
usepager = True
break
if usepager:
# Slight hack: the attend list is supposed to override
# the ignore list for the pager extension, but the
# core code doesn't know about attend, so we have to
# lobotomize the ignore list so that the extension's
# behavior is preserved.
ui.setconfig(b'pager', b'ignore', b'', b'pager')
ui.pager(b'extension-via-attend-' + cmd)
else:
ui.disablepager()
return orig(ui, options, cmd, cmdfunc)
extensions.wrapfunction(dispatch, '_runcommand', pagecmd)
attended = [b'annotate', b'cat', b'diff', b'export', b'glog', b'log', b'qdiff']