git bump script

gitbump.py

#
# Script to bump version number in a git repo
#
# @author Natesh Narain <[email protected]>
#

import subprocess
from argparse import ArgumentParser
import os

parser = ArgumentParser()
parser.add_argument('-b', '--bump', required=True, help='major, minor, or patch')
parser.add_argument('-i', '--increment', default='1', type=int, help='Increment field by "n"')

args = vars(parser.parse_args())

bump = args['bump']
increment = int(args['increment'])

# get last git tag
proc = subprocess.Popen('git tag', stdout=subprocess.PIPE)
version = filter(None, proc.stdout.read().split('\n'))[-1]

# get major.minor.patch from current version
parts = version.split('.')
major = int(parts[0])
minor = int(parts[1])
patch = int(parts[2])

# bump part
if bump == 'major':
	major += increment
elif bump == 'minor':
	minor += increment
else:
	patch += increment
	
new_version = "%d.%d.%d" % (major, minor, patch)

print 'Bumping version from %s to %s' % (version, new_version)

os.system('git tag -a %s' % (new_version))