#!/usr/local/bin/python
#	isitalabel.py
#
#	Determine if a label exists
#
#	Written April 2000 by Joshua Grigonis

import re, sys, string, os

update_pattern = re.compile ('Update:.*', re.IGNORECASE)



HELPTEXT = """
Usage:
\tpython isitalabel.py [label]

Program will print out results of the search.
Sets ISALABEL in the environment to 0 if found, 1 if not found.
Also will exit with errorlevel 1 if the label is not found
"""

def check (label):
	os.environ ["ISALABEL"] = "0"
	isfound = 0
	for line in os.popen ('p4 label -o ' + label).readlines():
		
		found = update_pattern.match (line)
		if found != None:
			
			os.environ ["ISALABEL"]= "1"
			isfound = 1
			
			
	return isfound
		
		
# end of check() function

def run():
	label = raw_input ('Enter label to check: ')
	
	fnd = check(label)
	if fnd == 1:
		print "The Label " + label + " exists"
	else:
		print "The Label " + label + " does not exist"
		sys.exit(1)
	
# end of run() function

if __name__ == '__main__':
	
	if len(sys.argv) == 1:
		run()
	if len(sys.argv) == 2:
		if string.upper(sys.argv[1]) == "/HELP":
			print HELPTEXT
			sys.exit(0)
		if sys.argv[1] == "/?":
			print HELPTEXT
			sys.exit(0)
		if string.upper(sys.argv[1]) == "-HELP":
			print HELPTEXT
			sys.exit(0)
		fnd = check(sys.argv[1])
		if fnd == 1:
			print "The Label " + sys.argv[1] + " exists"
		else:
			print "The Label " + sys.argv[1] + " does not exist"
			sys.exit(1)
	if len(sys.argv) > 2:
		print "You should only enter 1 label name on the command line"
	
# end of isitalabel.py