A small utility for listing or searching your SSH config file

showssh.py

#!/usr/bin/env python

import os
import argparse


def convert_to_types(configs):
    config_list = list()
    for i, x in enumerate(configs):
        v = x.strip().split(' ')
        if v[0] == '':
            pass
        else:
            #print(v)
            if v[0] == 'Host':
                config_item = dict(host=v[1])
            if v[0] == 'Hostname':
                config_item['hostname'] = v[1]
                config_list.append(config_item)
    config_dict = dict()
    for x in config_list:
        config_dict[x['host']] = x['hostname']
    return config_list, config_dict


def main(search=None):
    HOME = os.environ['HOME']
    SSH_HOME = os.path.join(HOME, '.ssh')
    config_file = os.path.join(SSH_HOME, 'config')
    with open(config_file, 'rt') as cf:
        configs = cf.readlines()
        #calculate longest line for divider
        maxlen = 0
        for w in configs:
            if len(w) > maxlen:
                maxlen = len(w)
    config_list, config_dict = convert_to_types(configs)
    if search is not None:
        search_list = list()
        for key, value in config_dict.items():
            if search in key:
                search_list.append({'host': key, 'hostname': value})
        if len(search_list) != 0:
            for x in search_list:
                print('%s -- %s' % (x['host'], x['hostname']))
        else:
            print('No matches found')
    if search is None:
        for key, value in config_dict.items():
            print('host: %s \nhostname: %s' % (key, value))
            print('-' * maxlen)


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument("-s", "--search", help="Search your ssh \
        config file for matching host names")
    args = parser.parse_args()
    main(args.search)