Generate south depends_on based on the current django project tree

Example output

depends_on =  (
    ('about', '0004_fake_user_fk'),
    ('accounts', '0029_auto__del_registration'),
    ('activity_feed', '0002_fake_user_fk'),
    ('analytics', '0006_add_labels'),
    ('art', '0036_auto__chg_field_packpurchase_royalty_millicents_per_credit__chg_field_'),
    ('bots', '0002_fake_user_fk'),
    ('comments', '0002_fake_user_fk'),
    ('core', '0012_auto__del_field_creatorprofile_points_balance__add_field_creatorprofil'),
    ('creator', '0002_fake_user_fk'),
    ('dev', '0002_fake_user_fk'),
    ('display_case', '0003_auto'),
    ('emotes', '0009_fake_user_fk'),
    ('front_admin', '0002_fake_user_fk'),
    ('home_page', '0005_fake_user_fk'),
    ('jasmine', '0002_fake_user_fk'),
    ('lessons', '0002_fake_user_fk'),
    ('mail', '0004_fake_user_fk'),
    ('nm', '0002_fake_user_fk'),
    ('notifications', '0002_fake_user_fk'),
    ('payments', '0015_auto__add_royaltypayout'),
    ('rewards', '0009_delete_invite_based_rewards'),
    ('search', '0002_fake_user_fk'),
    ('social', '0003_fake_user_fk'),
    ('tips', '0002_auto__add_field_tip_start__add_field_tip_end'),
    ('trades', '0004_auto__del_index_tradeoffer_role'),
)

make_depends_on.py

import subprocess
from collections import defaultdict

def ls_migrations(project_path):
    command = ['find', project_path, '-ipath', '*/migrations/*', '-iname', '*.py']
    finder = subprocess.Popen(command, stdout=subprocess.PIPE)
    for line in finder.stdout.read().split('\n'):
        if not '/migrations/' in line:
            continue
        before_migration, after_migration = line.split('/migrations/')
        app_name = before_migration.split('/')[-1]
        step_name = after_migration.split('.')[0]
        if step_name == '__init__':
            continue
        step_number = int(step_name.split('_')[0])

        yield app_name.lower(), step_name, step_number

def max_migrations(migrations):
    max_per_app = defaultdict(int)
    step_per_app = {}
    for app, step, step_number in migrations:
        if max_per_app[app] < step_number:
            max_per_app[app] = step_number
            step_per_app[app] = step
    return step_per_app

def format_depends_on(per_app):
    if not per_app:
        print "depends_on = (,)"
        return

    print "depends_on =  ("

    for (app, step) in sorted(per_app.items()):
        print "    ('%s', '%s')," % (app, step)

    print ")"

if __name__ == '__main__':
    import sys
    format_depends_on(max_migrations(ls_migrations(sys.argv[1])))

python make_depends_on.py /path/to/django/project/

Nice.

Useful. Thanks.