contains

#!/usr/bin/env python2.7

#==============================================================================
# Functionality
#==============================================================================
import pdb
import sys
import os
import re

# utility funcs, classes, etc go here.

def asserting(cond):
    if not cond:
        pdb.set_trace()
    assert(cond)

def has_stdin():
    return not sys.stdin.isatty()

def reg(pat, flags=0):
    return re.compile(pat, re.VERBOSE | flags)

#==============================================================================
# Cmdline
#==============================================================================
import argparse

parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter, 
    description="""
TODO
""")
     
parser.add_argument('-v', '--verbose',
    action="store_true",
    help="verbose output" )

args = None

#==============================================================================
# Main
#==============================================================================

def run():
    if args.verbose:
        print args
    if len(args.args) <= 0 and not has_stdin():
        # if there were no args and there was no input, prompt user.
        print 'Enter input (press Ctrl-D when done):'
    if len(args.args) <= 0 or has_stdin():
        indata = sys.stdin.read()
    # for each arg on cmdline...
    for arg in args.args:
        rx = reg(arg, re.MULTILINE)
        if rx.search(indata):
            if args.verbose:
                print 'stdin %s contains %s (pat=%s flags=%s)' % (repr(indata), repr(arg), repr(rx.pattern), repr(rx.flags))
            sys.exit(1)
        else:
            if args.verbose:
                print "stdin %s doesn't contain %s (pat=%s flags=%s)" % (repr(indata), repr(arg), repr(rx.pattern), repr(rx.flags))

def main():
    global args
    if not args:
        args, leftovers = parser.parse_known_args()
        args.args = leftovers
    return run()

if __name__ == "__main__":
    main()