A script to rename the last migration in the core migrations directory, also updating the max_migration file from django-linear-migrations.

rename_migration.py

import os
import sys

REPO_DIR = os.environ.get("REPO_LOCATION", None)
MIGRATIONS_DIR = os.path.join(REPO_DIR, 'core', 'migrations')
MAX_MIGRATION = os.path.join(MIGRATIONS_DIR, 'max_migration.txt')


def get_migration_number(migration: str) -> str:
    """Return the number part of a migration name."""
    number, _ = migration.split('_', maxsplit=1)
    return number


def get_latest_migration() -> str:
    """Gets latest migration."""
    develop_migrations = sorted([
        f for f in os.listdir(MIGRATIONS_DIR)
        if 'py' in f         # only python files
        and '__' not in f    # exclude __init__
    ])
    return develop_migrations[-1]


def update_max_migration(new_filename: str):
    """Update the max_migration file with the latest migration name."""
    new_name_no_ext = os.path.splitext(new_filename)[0]
    print(f'Setting max_migration to {new_name_no_ext}')
    with open(MAX_MIGRATION, 'w') as f:
        f.write(new_name_no_ext + '\n')


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print('Run with the new desired migration name.')

    last_migration_name = get_latest_migration()
    last_migration_number = get_migration_number(last_migration_name)
    last_migration_filename = os.path.join(MIGRATIONS_DIR, last_migration_name)

    new_name = f'{last_migration_number}_{sys.argv[1]}.py'
    new_filename = os.path.join(MIGRATIONS_DIR, new_name)

    print(f'Renaming {last_migration_name} to {new_name}')
    os.rename(last_migration_filename, new_filename)
    update_max_migration(new_name)

A script intended to reduce the tedium involved when making migrations and renaming them to something useful.
Run this script after making a migration with the new desired name, e.g. rename_migration.py test. This will rename the migration and also update the max_migration file for you.