hgext/pager.py
author Brodie Rao <me+hg@dackz.net>
Fri, 19 Feb 2010 22:16:42 -0500
branchstable
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child 10973 49a07f441496
child 11182 3c368a1c962d
permissions -rw-r--r--
pager: set ui.interactive=False when enabled This stops interactive-only things like progress bars from showing up inside the pager.
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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 .hgrc 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
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To set the pager that should be used, set the application variable::
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  [pager]
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  pager = LESS='FSRX' less
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If no pager is set, the pager extensions uses the environment variable
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$PAGER. If neither pager.pager, nor $PAGER is set, no pager is used.
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If you notice "BROKEN PIPE" error messages, you can disable them by
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setting::
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  [pager]
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  quiet = True
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You can disable the pager for certain commands by adding them to the
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pager.ignore list::
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  [pager]
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  ignore = version, help, update
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You can also enable the pager only for certain commands using
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pager.attend. Below is the default list of commands to be paged::
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  [pager]
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  attend = annotate, cat, diff, export, glog, log, qdiff
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Setting pager.attend to an empty value will cause all commands to be
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paged.
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If pager.attend is present, pager.ignore will be ignored.
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To ignore global commands like "hg version" or "hg help", you have to
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specify them in the global .hgrc
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'''
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import sys, os, signal
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from mercurial import dispatch, util, extensions
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def uisetup(ui):
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    def pagecmd(orig, ui, options, cmd, cmdfunc):
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        p = ui.config("pager", "pager", os.environ.get("PAGER"))
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        if p and sys.stdout.isatty() and '--debugger' not in sys.argv:
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            attend = ui.configlist('pager', 'attend', attended)
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            if (cmd in attend or
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                (cmd not in ui.configlist('pager', 'ignore') and not attend)):
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                ui.setconfig('ui', 'interactive', False)
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                sys.stderr = sys.stdout = util.popen(p, "wb")
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                if ui.configbool('pager', 'quiet'):
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                    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
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        return orig(ui, options, cmd, cmdfunc)
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    extensions.wrapfunction(dispatch, '_runcommand', pagecmd)
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attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff']