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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.
"""
Loading mechanism for service templates.
"""
import os
from urlparse import urlparse
from . import csar
from . import utils
from .exceptions import AriaCliError
from ..utils import archive as archive_utils
def get(source, service_template_filename):
"""
Get a source and return a path to the main service template file
The behavior based on then source argument content is:
* local ``.yaml`` file: return the file
* local archive (``.csar``, ``.zip``, ``.tar``, ``.tar.gz``, and ``.tar.bz2``): extract it
locally and return path service template file
* URL: download and get service template from downloaded archive
* GitHub repo: download and get service template from downloaded archive
:param source: path/URL/GitHub repo to archive/service-template file
:type source: basestring
:param service_template_filename: path to service template if source is a non-CSAR archive
with CSAR archives, this is read from the metadata file)
:type service_template_filename: basestring
:return: path to main service template file
:rtype: basestring
"""
if urlparse(source).scheme:
downloaded_file = utils.download_file(source)
return _get_service_template_file_from_archive(
downloaded_file, service_template_filename)
elif os.path.isfile(source):
if _is_archive(source):
return _get_service_template_file_from_archive(source, service_template_filename)
else:
# Maybe check if yaml.
return os.path.abspath(source)
elif len(source.split('/')) == 2:
url = _map_to_github_url(source)
downloaded_file = utils.download_file(url)
return _get_service_template_file_from_archive(
downloaded_file, service_template_filename)
else:
raise AriaCliError(
'You must provide either a path to a local file, a remote URL '
'or a GitHub `organization/repository[:tag/branch]`')
def _get_service_template_file_from_archive(archive, service_template_filename):
"""
Extract archive to temporary location and get path to service template file.
:param archive: path to archive file
:type archive: basestring
:param service_template_filename: path to service template file relative to archive
:type service_template_filename: basestring
:return: absolute path to service template file
:rtype: basestring
"""
if csar.is_csar_archive(archive):
service_template_file = _extract_csar_archive(archive)
else:
extract_directory = archive_utils.extract_archive(archive)
print extract_directory
service_template_dir = os.path.join(
extract_directory,
os.listdir(extract_directory)[0],
)
print service_template_dir
service_template_file = os.path.join(service_template_dir, service_template_filename)
print service_template_file
print service_template_filename
if not os.path.isfile(service_template_file):
raise AriaCliError(
'Could not find `{0}`. Please provide the name of the main '
'service template file by using the `-n/--service-template-filename` flag'
.format(service_template_filename))
return service_template_file
def _map_to_github_url(source):
"""
Returns a path to a downloaded GitHub archive.
:param source: GitHub repo: ``org/repo[:tag/branch]``
:type source: basestring
:return: URL to the archive file for the given repo in GitHub
:rtype: basestring
"""
source_parts = source.split(':', 1)
repo = source_parts[0]
tag = source_parts[1] if len(source_parts) == 2 else 'master'
url = 'https://github.com/{0}/archive/{1}.tar.gz'.format(repo, tag)
return url
def _is_archive(source):
return archive_utils.is_archive(source) or csar.is_csar_archive(source)
def _extract_csar_archive(archive):
reader = csar.read(source=archive)
main_service_template_file_name = os.path.basename(reader.entry_definitions)
return os.path.join(reader.destination,
main_service_template_file_name)
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