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dmbaturin/config.py

Created Dec 22, 2016
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# Copyright (c) 2016 VyOS maintainers and contributors
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the Software
# is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
# OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
# IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import subprocess
import re
__cli_shell_api = '/bin/cli-shell-api'
class VyOSError(Exception):
pass
def _make_command(op, path):
args = path.split()
cmd = [__cli_shell_api, op] + args
return cmd
def _run(cmd):
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
out = p.stdout.read()
p.wait()
if p.returncode != 0:
raise VyOSError()
else:
return out
def exists(path):
try:
_run(_make_command('exists', path))
return True
except VyOSError:
return False
def session_changed():
try:
_run(_make_command('sessionChanged', ''))
return True
except VyOSError:
return False
def in_session():
try:
_run(_make_command('inSession', ''))
return True
except VyOSError:
return False
def is_multi(path):
try:
_run(_make_command('isMulti', path))
return True
except VyOSError:
return False
def is_tag(path):
try:
_run(_make_command('isTag', path))
return True
except VyOSError:
return False
def is_leaf(path):
try:
_run(_make_command('isLeaf', path))
return True
except VyOSError:
return False
def return_value(path):
if is_multi(path):
raise VyOSError("Cannot use return_value on multi node: {0}".format(path))
elif not is_leaf(path):
raise VyOSError("Cannot use return_value on non-leaf node: {0}".format(path))
else:
try:
out = _run(_make_command('returnValue', path))
return out
except VyOSError:
raise VyOSError("Path doesn't exist: {0}".format(path))
def return_values(path):
if not is_multi(path):
raise VyOSError("Cannot use return_values on non-multi node: {0}".format(path))
elif not is_leaf(path):
raise VyOSError("Cannot use return_values on non-leaf node: {0}".format(path))
else:
try:
out = _run(_make_command('returnValues', path))
return out
except VyOSError:
raise VyOSError("Path doesn't exist: {0}".format(path))
def list_nodes(path):
if is_tag(path):
try:
out = _run(_make_command('listNodes', path))
values = out.split()
return list(map(lambda x: re.sub(r'^\'(.*)\'$', r'\1',x), values))
except VyOSError:
raise VyOSError("Path doesn't exist: {0}".format(path))
else:
raise VyOSError("Cannot use list_nodes on a non-tag node: {0}".format(path))
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