qy

#!/usr/bin/python
"""qy: A scriptable, command-line Moira client."""

import optparse

import moira


def parser():
    p = optparse.OptionParser(usage='Usage: %prog [options] query args...')
    p.add_option('--db', '--database',
                 dest='database',
                 default='',
                 help='Host and port of the Moira database to contact')
    p.add_option('-n', '--noauth',
                 dest='auth',
                 action='store_false',
                 default=True,
                 help="Don't use Kerberos authentication")
    p.add_option('-p', '--program',
                 dest='program',
                 default='pyqy',
                 help='Program name to use when identifying to the Moira database')
    p.add_option('-s', '--single',
                 dest='single',
                 action='store_true',
                 default=False,
                 help='Print each result on a single line')
    p.add_option('-f', '--fields',
                 dest='fields',
                 help='Only print out values from this list of comma-separated fields')

    return p


def filter_fields(result, fields):
    return [(k, v) for (k, v) in result if \
                not fields or k in fields]


def main():
    p = parser()
    options, args = p.parse_args()

    if len(args) < 1:
        p.error('No query specified.')

    if options.fields:
        options.fields = set(options.fields.split(','))

    moira.connect(options.database)
    if options.auth:
        moira.auth(options.program)

    if args[0].startswith('_'):
        print '\n'.join(', '.join(x) for x in
                        moira._list_query(*args))
    else:
        results = moira.query(fmt=tuple, *args)

        for r in results:
            keylen = max(len(k) for (k, v) in r)
            r = filter_fields(r, options.fields)

            if options.single:
                print ', '.join(v for (k, v) in r)
            else:
                for k, v in r:
                    print '%-*s: %s' % (keylen, k, v)
                print

if __name__ == '__main__':
    main()