flutterbuild.py

#!/usr/bin/env python3

from sys import argv
from subprocess import run

FILENAME = 'pubspec.yaml'
BACKUP_FILENAME = '.pubspec.old.yaml'

try:
    with open(FILENAME) as f:
        lines = f.readlines()
except FileNotFoundError:
    print('No pubspec.yaml file in current directory')
    exit(1)

with open(BACKUP_FILENAME, 'w') as f:
    f.writelines(lines)

for i in range(len(lines)):
    if lines[i].startswith('version'):
        split = lines[i].split('+')
        build_number = run('git rev-list --all --count'.split(), capture_output=True).stdout.decode('utf8').strip()
        print('BUILD NUMBER', build_number)
        lines[i] = split[0] + '+' + build_number + '\n'
        break

with open(FILENAME, 'w') as f:
    f.writelines(lines)

if len(argv) > 1 and argv[1] in ['--debug', '--release', '--profile']:
    args = ' ' + argv[1]
else:
    args = ''
run(('flutter build ios' + args).split(), check=False)