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gozerplugs/plugs/tail.py

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# plugs/tail.py

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#

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#

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__copyright__ = 'this file is in the public domain'

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from gozerbot.generic import waitforqueue

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from gozerbot.commands import cmnds

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from gozerbot.plughelp import plughelp

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from gozerbot.examples import examples

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plughelp.add('tail', 'show last <nr> elements of pipeline')

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def handle_tail(bot, ievent):

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    """ used in a pipeline .. show last <nr> elements """

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    if not ievent.inqueue:

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        ievent.reply("use tail in a pipeline")

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        return

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    try:

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        nr = int(ievent.args[0])

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    except (ValueError, IndexError):

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        ievent.reply('tail <nr>')

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        return

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    result = waitforqueue(ievent.inqueue, 30)

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    if not result:

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        ievent.reply('no data to tail')

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        return

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    ievent.reply(result[-nr:])

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cmnds.add('tail', handle_tail, ['USER', 'ANON'])

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examples.add('tail', 'show last <nr> lines of pipeline output', \

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'list | tail 5')

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