fabfile task to spot dupe-numbered south migrations

gistfile1.py

# this is intended to be run as part of a fab-suite, i.e. fab git_push, which runs tests, all files committed, etc. before pushing.

def ensure_no_duped_migrations():
    migration_dirs = local('find %s -type d -iname migrations' % ROOT_DIR,
        True).split('\n')
    for migration_dir in migration_dirs:
        full_migration_dir = path.join(ROOT_DIR, migration_dir)

        # FIXME: for GNU find, need regextype=posix-extended
        dupe_checker = ("find -E %s -iregex '.*/[0-9]{4,}[^/]*\.py' -exec basename {} ';'| cut -d_ -f1  | sort | uniq -d" %
            full_migration_dir)
        any_match = local(dupe_checker, True)
        if any_match:
            abort("""The %s dir has same-numbered migrations.  Fix this.
                Don't just renumber, see http://south.aeracode.org/docs/tutorial/part5.html#team-workflow""" %
                migration_dir)