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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)