The gtfs2db script

This is a script to manage the database. Here is its help message:

 gtfs2db - convert a gtfs feed to a pygtfs database

Usage:
  gtfs2db append <feed_file> <database> [--chunk-size <integer>]
  gtfs2db overwrite <feed_file> <database> [-i, --interactive] [--chunk-size <integer>]
  gtfs2db delete <feed_file> <database> [-i, --interactive]
  gtfs2db list <database>
  gtfs2db (-h | --help)
  gtfs2db --version

Options:
  -h --help          Show this help screen.
  --version          Show version.
  -i --interactive   Ask before deleting or overwriting existing feeds.
  --chunk-size <int> How often to flush database. If memory consumption is high,
                     lower this number. [default: 10000]
  <feed_file>        The gtfs file on which to operate. Can be either a folder
                     containing .txt files, or a .zip file.
  <database>         The database. Can be either a file, which is interpreted
                     as an sqlite database stored in this file, or a sqlalchemy
                     database connection.

Commands:
  append            appends the gtfs feed to the database
  overwrite         delete any existing feeds which had the same original
                    filename as the new file, and then append the new file.
  delete            delete from the database any feeds with the name supplied.
  list              list existing feeds in the database.

Description:
  This is a tool to manage a database containing several gtfs feeds. The
  database is in a pygtfs 0.1.0 format, and can be stored as any database
  supported by sqlalchemy (the default being sqlite).
  The database file can later be used to create a `pygtfs.Schedule` instance.