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#!/usr/bin/env python3

# migrate old style `webproxy proxy-bypass 1.2.3.4/24`
# to new style `webproxy whitelist destination-address 1.2.3.4/24`

import sys

from vyos.configtree import ConfigTree

if len(sys.argv) < 1:
    print("Must specify file name!")
    sys.exit(1)

file_name = sys.argv[1]

with open(file_name, 'r') as f:
    config_file = f.read()

config = ConfigTree(config_file)

cfg_webproxy_base = ['service', 'webproxy']
if not config.exists(cfg_webproxy_base + ['proxy-bypass']):
    # Nothing to do
    sys.exit(0)
else:
    bypass_addresses = config.return_values(cfg_webproxy_base + ['proxy-bypass'])
    # delete old configuration node
    config.delete(cfg_webproxy_base + ['proxy-bypass'])
    for bypass_address in bypass_addresses:
        # add data to new configuration node
        config.set(cfg_webproxy_base + ['whitelist', 'destination-address'], value=bypass_address, replace=False)

    # save updated configuration
    try:
        with open(file_name, 'w') as f:
            f.write(config.to_string())
    except OSError as e:
        print("Failed to save the modified config: {}".format(e))
        sys.exit(1)