hgext/pager.py
author Yuya Nishihara <yuya@tcha.org>
Sat, 20 Jun 2020 11:10:23 +0900
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child 45942 89a2afe31e82
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# pager.py - display output using a pager
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#
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# Copyright 2008 David Soria Parra <dsp@php.net>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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#
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# To load the extension, add it to your configuration file:
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#
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#   [extension]
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#   pager =
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#
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# Run 'hg help pager' to get info on configuration.
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'''browse command output with an external pager (DEPRECATED)
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Forcibly enable paging for individual commands that don't typically
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request pagination with the attend-<command> option. This setting
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takes precedence over ignore options and defaults::
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  [pager]
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  attend-cat = false
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'''
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from __future__ import absolute_import
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from mercurial import (
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    cmdutil,
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    commands,
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    dispatch,
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    extensions,
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    registrar,
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)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = b'ships-with-hg-core'
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configtable = {}
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configitem = registrar.configitem(configtable)
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configitem(
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    b'pager', b'attend', default=lambda: attended,
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)
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def uisetup(ui):
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    def pagecmd(orig, ui, options, cmd, cmdfunc):
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        auto = options[b'pager'] == b'auto'
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        if auto and not ui.pageractive:
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            usepager = False
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            attend = ui.configlist(b'pager', b'attend')
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            ignore = ui.configlist(b'pager', b'ignore')
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            cmds, _ = cmdutil.findcmd(cmd, commands.table)
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            for cmd in cmds:
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                var = b'attend-%s' % cmd
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                if ui.config(b'pager', var, None):
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                    usepager = ui.configbool(b'pager', var, True)
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                    break
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                if cmd in attend or (cmd not in ignore and not attend):
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                    usepager = True
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                    break
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            if usepager:
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                # Slight hack: the attend list is supposed to override
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                # the ignore list for the pager extension, but the
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                # core code doesn't know about attend, so we have to
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                # lobotomize the ignore list so that the extension's
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                # behavior is preserved.
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                ui.setconfig(b'pager', b'ignore', b'', b'pager')
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                ui.pager(b'extension-via-attend-' + cmd)
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            else:
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                ui.disablepager()
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        return orig(ui, options, cmd, cmdfunc)
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    extensions.wrapfunction(dispatch, b'_runcommand', pagecmd)
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attended = [b'annotate', b'cat', b'diff', b'export', b'glog', b'log', b'qdiff']