#!/usr/bin/env python3

"""

Usage

-----

    pgtool --list

        List all available tools.

    pgtool <tool_name> <arg_1> <arg_2> ...

        Run tool. All args except first one are forwarded to the tool.

    pgtool schemadiff db1 db2

        E.g. run schemadiff between db1 and db2.

    pgtool schemadiff --help

        Get help for tool parameters.

Configuration

-------------

Local configuration:

Additional config file can be loaded using -c parameter (after tool name).

Configuration from all present files is loaded in above order,

later value overrides previous value. Resulting config file priority is:

   1) parameter

   2) local

   3) global

"""

import sys

from importlib import import_module

def print_tool_with_short_desc(name):

    short_desc = module.cls.__doc__.lstrip().splitlines()[0]

    print(name.ljust(15), '-', short_desc)

if __name__ == '__main__':

    if len(sys.argv) < 2:

        print(__doc__, end='')

        sys.exit()

    if sys.argv[1].startswith('--'):

        if sys.argv[1] == '--list':

                print_tool_with_short_desc(tool)

        else:

            print(__doc__, end='')

        sys.exit()

    tool = sys.argv[1]

    tool_args = sys.argv[2:]

        print('Unknown tool "%s".\n\nCall "pgtool --list" to get list of all available tools.' % tool)

        sys.exit()

    tool = module.cls()

    tool.setup(tool_args)

    tool.main()