serv_switch

#!/usr/bin/python
# Switches the server config file for vim-syncr
# Copyright (C) 2014 Jacob Malcom, jmalcom@uconn.edu
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>.

import glob
import os
import sys

def get_name(f):
    "Return the name of the remote machine described in file f."
    for line in open(f):
        if line.startswith("name"):
            return line.rstrip().split()[-1]

def switch(cur, cur_nam, new):
    "Rename the .syncrconf files to make the chosen remote active."
    old_nam = cur + "_" + cur_nam
    os.rename(cur, old_nam)
    new_dat = new.split("/")
    new_nam = "/".join(new_dat[:-1]) + "/" + new_dat[-1].split("_")[0]
    os.rename(new, new_nam)

def main():
    "Facilitate simple remote machine switching using vim-syncr."
    repository_directory = os.path.dirname(os.path.realpath(__file__))
    servers, cnt = {}, 0
    for fil in glob.glob(os.path.join(repository_directory, ".syncrconf*")):
        if fil == os.path.join(repository_directory, ".syncrconf"):
            cur_serv = fil
            cur_serv_name = get_name(fil)
        cnt += 1
        for line in open(fil):
            if line.startswith("name"):
                servers[fil] = line.rstrip().split()[-1]

    print("\nAvailable servers:")
    serv_keys = servers.keys()
    for i in range(len(serv_keys)):
        print("\t%s %s" % (i, servers[serv_keys[i]]))
    if len(serv_keys) == 0
        print("No servers found")

    choice = int(input("\nWhich server to choose?\t"))
    if servers[serv_keys[choice]] == cur_serv_name:
        print("Server not changed.")
        sys.exit()
    switch(cur_serv, cur_serv_name, serv_keys[choice])

if __name__ == '__main__':
    main()