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#!/usr/bin/env python

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import logging; log = logging.getLogger('pvl.hosts-dhcp')

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import optparse

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import pvl.args

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import pvl.hosts

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import pvl.hosts.dhcp

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def main (argv):

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    """

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        Generate DHCP host configs from host definitions.

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    """

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    parser = optparse.OptionParser(main.__doc__)

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    parser.add_option_group(pvl.args.parser(parser))

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    parser.add_option_group(pvl.hosts.config.optparser(parser))

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    # input

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    options, args = pvl.args.parse(parser, argv)

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    if not args:

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        log.fatal("no hosts given as input")

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        return 1

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    hosts = pvl.hosts.apply(options, args)

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    # process

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    try:

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        for block in pvl.hosts.dhcp.dhcp_hosts(hosts):

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            for line in pvl.dhcp.config.build_block(block):

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                print line

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            print ''

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    except pvl.hosts.HostError as error:

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        log.error("%s", error)

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        return 3

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if __name__ == '__main__':

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    pvl.args.main(main)