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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from netmodel.model.type import String, Bool
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.exception import ResourceNotFound
from vicn.core.resource import Resource
from vicn.core.task import BashTask, inline_task
from vicn.resource.node import Node
CREATE_DIR_CMD = "mkdir -p {dir}"
CREATE_FILE_CMD = "mkdir -p $(dirname {file.filename}) && touch {file.filename}"
DELETE_FILE_CMD = "rm -f {file.filename}"
GET_FILE_CMD = 'test -f {file.filename} && readlink -e {file.filename}'
GREP_FILE_CMD = "cat {file.filename}"
CMD_PRINT_TO_FILE = 'echo -n "{file.content}" > {file.filename}'
class File(Resource):
"""
Resource: File
"""
filename = Attribute(String, description = 'Path to the file',
mandatory = True)
node = Attribute(Node, description = 'Node on which the file is created',
mandatory = True,
multiplicity = Multiplicity.ManyToOne,
reverse_name = 'files',
reverse_description = 'Files created on the node')
overwrite = Attribute(Bool,
description = 'Determines whether an existing file is overwritten',
default = False)
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
def __get__(self):
# UGLY
@inline_task
def not_found():
raise ResourceNotFound
if self.overwrite:
return not_found()
def is_path (rv):
if rv is None or rv.stdout is None or len(rv.stdout) == 0 or \
rv.return_value != 0:
raise ResourceNotFound
return {} # 'filename': rv.stdout}
test = BashTask(self.node, GET_FILE_CMD, {"file": self}, parse=is_path)
return test
def __create__(self):
ctask = BashTask(self.node, CREATE_FILE_CMD, {"file": self})
if self.overwrite:
ctask = BashTask(self.node, DELETE_FILE_CMD, {'file': self}) > ctask
return ctask
def __delete__(self):
return BashTask(self.node, DELETE_FILE_CMD, { "file" : self})
#------------------------------------------------------------------------------
class TextFile(File):
"""
Resource: TextFile
A file with text content.
"""
content = Attribute(String, default='')
#--------------------------------------------------------------------------
# Resource lifecycle
#--------------------------------------------------------------------------
def __create__(self):
return BashTask(self.node, CMD_PRINT_TO_FILE, {'file': self})
#--------------------------------------------------------------------------
# Attributes
#--------------------------------------------------------------------------
def _set_content(self):
return self.__create__()
def _get_content(self):
return BashTask(self.node, GREP_FILE_CMD, {'file': self},
parse =( lambda x : x.stdout))
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