Annotates redux actions files with some Flow types

redux-actions-to-flow.py

# Super quick and dirty script to bootstrap our action files with some Flow boilerplate.

import re
import sys


def get_action_constant(l):
    m = re.search('= \'(.*)\'', l)
    if m:
        return m.group(1)


def get_action_type_name(s):
    return 'Action' + s.replace('_', ' ').lower().title().replace(' ', '')


def get_action_type(action_const):
    action_name = get_action_type_name(action_const)
    return """
    type {} = {{
        type: '{}',
    }}
    """.format(action_name, action_const)


def print_flow_types_for_action_file(file_name):
    with open(file_name) as f:
        action_consts = [
            get_action_constant(l) for l in f.readlines()
            if get_action_constant(l) is not None
        ]

        for a in action_consts:
            print get_action_type(a)

        print """
    export type ActionTypes =
        {}
    ;
        """.format('\n\t| '.join(map(get_action_type_name, action_consts)))


if __name__ == '__main__':
    if len(sys.argv) < 2:
        print 'Usage: give me a file path to an action file...'
    else:
        print_flow_types_for_action_file(sys.argv[1])