unmigrate

#!/usr/bin/env python
import re
import sys
from subprocess import check_output

if len(sys.argv) > 1:
    base = sys.argv[1]
else:
    base = 'develop'

command = "git diff --name-only --diff-filter=A {} | grep migrations".format(base)
new_files = check_output(command, shell=True)
apps = {}
for path in new_files.split('\n'):
    mo = re.match(r'apps/(.*)/migrations/(\d+).*', path)
    if not mo:
        continue

    app = mo.group(1)
    first = int(mo.group(2))
    if app not in apps:
        apps[app] = first
    else:
        apps[app] = min(apps[app], first)

for app in apps:
    print('./manage.py migrate {} {}'.format(app, 'zero' if apps[app] == 1 else '{:04d}'.format(apps[app] - 1)))