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vyos-merge-config.py
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vyos-merge-config.py
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#!/usr/bin/python3
# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import sys
import os
import tempfile
import vyos.defaults
import vyos.remote
from vyos.config import Config
from vyos.configtree import ConfigTree
from vyos.migrator import Migrator, VirtualMigrator
from vyos.util import cmd, DEVNULL
if (len(sys.argv) < 2):
print("Need config file name to merge.")
print("Usage: merge <config file> [config path]")
sys.exit(0)
file_name = sys.argv[1]
configdir = vyos.defaults.directories['config']
protocols = ['scp', 'sftp', 'http', 'https', 'ftp', 'tftp']
if any(x in file_name for x in protocols):
config_file = vyos.remote.get_remote_config(file_name)
if not config_file:
sys.exit("No config file by that name.")
else:
canonical_path = "{0}/{1}".format(configdir, file_name)
first_err = None
try:
with open(canonical_path, 'r') as f:
config_file = f.read()
except Exception as err:
first_err = err
try:
with open(file_name, 'r') as f:
config_file = f.read()
except Exception as err:
print(first_err)
print(err)
sys.exit(1)
with tempfile.NamedTemporaryFile() as file_to_migrate:
with open(file_to_migrate.name, 'w') as fd:
fd.write(config_file)
virtual_migration = VirtualMigrator(file_to_migrate.name)
virtual_migration.run()
migration = Migrator(file_to_migrate.name)
migration.run()
if virtual_migration.config_changed() or migration.config_changed():
with open(file_to_migrate.name, 'r') as fd:
config_file = fd.read()
merge_config_tree = ConfigTree(config_file)
effective_config = Config()
effective_config_tree = effective_config._running_config
effective_cmds = effective_config_tree.to_commands()
merge_cmds = merge_config_tree.to_commands()
effective_cmd_list = effective_cmds.splitlines()
merge_cmd_list = merge_cmds.splitlines()
effective_cmd_set = set(effective_cmd_list)
add_cmds = [ cmd for cmd in merge_cmd_list if cmd not in effective_cmd_set ]
path = None
if (len(sys.argv) > 2):
path = sys.argv[2:]
if (not effective_config_tree.exists(path) and not
merge_config_tree.exists(path)):
print("path {} does not exist in either effective or merge"
" config; will use root.".format(path))
path = None
else:
path = " ".join(path)
if path:
add_cmds = [ cmd for cmd in add_cmds if path in cmd ]
for add in add_cmds:
try:
cmd(f'/opt/vyatta/sbin/my_{add}', shell=True, stderr=DEVNULL)
except OSError as err:
print(err)
if effective_config.session_changed():
print("Merge complete. Use 'commit' to make changes effective.")
else:
print("No configuration changes to commit.")

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