CLI Program Skeleton

I make these CLI programs fairly frequently as personal utilities and dislike re-writing this boilerplate. It may be amenable to a library, but I haven't put the time in to generalize it.

#! /usr/bin/env python

import os
import sys
import textwrap
from optparse import OptionParser

#
# NOTE TO SELF: usage() provided by James's custom library "phyles"
#

__program__ = "dosomething"
__version__ = '0.1'

def banner(width=70):
  hline = "=" * width
  print hline
  print ("%s v.%s " % (__program__, __version__)).center(width)
  print hline

def doopts():
  program = os.path.basename(sys.argv[0])
  usg = """\
        usage: %s [-h | -t | -k | settings.cfg]

          - Use the -t flag without a settings file name to set
            up current directory with template files
          - Use the -k flag without a settings file to skip
            optional steps
       """
  usg = textwrap.dedent(usg) % program
  parser = OptionParser(usage=usg)
  parser.add_option("-t", "--template", dest="template",
                    default=False, action="store_true",
                    help="set up current directory",
                    metavar="TEMPLATE")
  parser.add_option("-k", "--skip-steps", dest="skip",
                   default=None, action="store_true",
                   help="skip optional steps")
  parser.add_option("-m", "--minimize", dest="minimize",
                    default=False, action="store_true",
                    help="run minimize instead of anneal")
  return parser

def usage(parser, msg=None, width=70):
  err = ' ERROR '.center(width, '#')
  errbar = '#' * width
  hline = '=' * width
  if msg is not None:
     print '\n'.join(('', err, msg, errbar, ''))
  print hline
  print
  print parser.format_help()
  sys.exit(0)

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

  try:
    texfile = args[0]
  except IndexError:
    usage(parser, 'No texfile specified.')


if __name__ == "__main__":
  main()