#!/usr/bin/env python3
'''
A form-save trigger for the Perforce server to enforce sane job names.
 
$DateTimeTZ: 2015/03/13 07:17:58 -0700 PDT $
$Author: lester_cheung $
$Id: //guest/lester_cheung/p4util/p4util/trigger/form/sane_jobname.py#1 $
 
'''
import sys
 
SECTION_NAME = 'JOB'
PREPY3 = sys.version_info[0] < 3
if PREPY3:
    from ConfigParser import ConfigParser
    from StringIO import StringIO
else:
    from configparser import ConfigParser
 
 
def sane_jobname(specfilename):
    '''Dies with exit state 1 unless jobname is pretty.'''
    with open(specfilename) as fd:
        spec = '[{0}]\n'.format(SECTION_NAME) + fd.read()
 
    cfg = ConfigParser()
 
    if PREPY3:
        fakefile = StringIO(spec)
        cfg.readfp(fakefile)  # ConfigParser.read_string was added in Python 3.2
        job_label_defined = cfg.has_option(SECTION_NAME, 'Job')
    else:
        cfg.read_string(spec)
        job_label_defined = 'Job' in cfg[SECTION_NAME]
 
    if not job_label_defined:
        print('Field "Job" is required')
        sys.exit(1)
 
    jobname = cfg.get(SECTION_NAME, 'Job')
    if jobname == 'new' or jobname.startswith('job'):
        sys.exit(0)
 
    print('Job name ({0}) should be "new" or starts with "job".'.format(jobname))
    sys.exit(1)
 
 
if __name__ == '__main__':
    myspecfile = sys.argv[1]
    sane_jobname(myspecfile)
    # should never return