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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import os |
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import shutil |
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import hashlib |
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import stat |
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import six |
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from git.repo import Repo |
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from lockfile import LockFile |
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from st2actions.runners.pythonrunner import Action |
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from st2common.util.green import shell |
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MANIFEST_FILE = 'pack.yaml' |
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CONFIG_FILE = 'config.yaml' |
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GITINFO_FILE = '.gitinfo' |
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PACK_RESERVE_CHARACTER = '.' |
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PACK_GROUP_CFG_KEY = 'pack_group' |
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EXCHANGE_URL_KEY = 'exchange_url' |
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class DownloadGitRepoAction(Action): |
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def __init__(self, config=None, action_service=None): |
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super(DownloadGitRepoAction, self).__init__(config=config, action_service=action_service) |
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def run(self, pack, version, abs_repo_base, verifyssl=True): |
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self._pack_name, self._pack_url = self._get_pack_name_and_url( |
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pack, |
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self.config.get(EXCHANGE_URL_KEY, None) |
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) |
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lock_name = hashlib.md5(self._pack_name).hexdigest() + '.lock' |
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with LockFile('/tmp/%s' % (lock_name)): |
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abs_local_path = self._clone_repo(repo_name=self._pack_name, repo_url=self._pack_url, |
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verifyssl=verifyssl, branch=version) |
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try: |
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result = self._move_pack(abs_repo_base, self._pack_name, abs_local_path) |
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finally: |
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self._cleanup_repo(abs_local_path) |
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return self._validate_result(result=result, repo_url=self._pack_url) |
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@staticmethod |
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def _clone_repo(repo_name, repo_url, verifyssl=True, branch='master'): |
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user_home = os.path.expanduser('~') |
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abs_local_path = os.path.join(user_home, repo_name) |
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# Disable SSL cert checking if explictly asked |
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if not verifyssl: |
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os.environ['GIT_SSL_NO_VERIFY'] = 'true' |
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# Shallow clone the repo to avoid getting all the metadata. We only need HEAD of a |
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# specific branch so save some download time. |
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Repo.clone_from(repo_url, abs_local_path, branch=branch, depth=1) |
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return abs_local_path |
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def _move_pack(self, abs_repo_base, pack_name, abs_local_path): |
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result = {} |
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desired, message = DownloadGitRepoAction._is_desired_pack(abs_local_path, pack_name) |
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if desired: |
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to = abs_repo_base |
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dest_pack_path = os.path.join(abs_repo_base, pack_name) |
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if os.path.exists(dest_pack_path): |
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self.logger.debug('Removing existing pack %s in %s to replace.', pack_name, |
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dest_pack_path) |
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# Ensure to preserve any existing configuration |
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old_config_file = os.path.join(dest_pack_path, CONFIG_FILE) |
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new_config_file = os.path.join(abs_local_path, CONFIG_FILE) |
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if os.path.isfile(old_config_file): |
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shutil.move(old_config_file, new_config_file) |
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shutil.rmtree(dest_pack_path) |
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self.logger.debug('Moving pack from %s to %s.', abs_local_path, to) |
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shutil.move(abs_local_path, to) |
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# post move fix all permissions. |
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self._apply_pack_permissions(pack_path=dest_pack_path) |
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message = 'Success.' |
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elif message: |
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message = 'Failure : %s' % message |
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result[pack_name] = (desired, message) |
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return result |
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def _apply_pack_permissions(self, pack_path): |
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""" |
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Will recursively apply permission 770 to pack and its contents. |
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""" |
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# 1. switch owner group to configured group |
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pack_group = self.config.get(PACK_GROUP_CFG_KEY, None) |
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if pack_group: |
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shell.run_command(['sudo', 'chgrp', '-R', pack_group, pack_path]) |
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# 2. Setup the right permissions and group ownership |
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# These mask is same as mode = 775 |
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mode = stat.S_IRWXU | stat.S_IRWXG | stat.S_IROTH | stat.S_IXOTH |
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os.chmod(pack_path, mode) |
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# Yuck! Since os.chmod does not support chmod -R walk manually. |
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for root, dirs, files in os.walk(pack_path): |
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for d in dirs: |
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os.chmod(os.path.join(root, d), mode) |
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for f in files: |
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os.chmod(os.path.join(root, f), mode) |
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@staticmethod |
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def _is_desired_pack(abs_pack_path, pack_name): |
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# path has to exist. |
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if not os.path.exists(abs_pack_path): |
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return (False, 'Pack "%s" not found or it\'s missing a "pack.yaml" file.' % |
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(pack_name)) |
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# should not include reserve characters |
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if PACK_RESERVE_CHARACTER in pack_name: |
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return (False, 'Pack name "%s" contains reserve character "%s"' % |
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(pack_name, PACK_RESERVE_CHARACTER)) |
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# must contain a manifest file. Empty file is ok for now. |
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if not os.path.isfile(os.path.join(abs_pack_path, MANIFEST_FILE)): |
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return (False, 'Pack is missing a manifest file (%s).' % (MANIFEST_FILE)) |
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return (True, '') |
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@staticmethod |
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def _cleanup_repo(abs_local_path): |
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# basic lock checking etc? |
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if os.path.isdir(abs_local_path): |
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shutil.rmtree(abs_local_path) |
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@staticmethod |
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def _validate_result(result, repo_url): |
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atleast_one_success = False |
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sanitized_result = {} |
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for k, v in six.iteritems(result): |
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atleast_one_success |= v[0] |
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sanitized_result[k] = v[1] |
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if not atleast_one_success: |
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message_list = [] |
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message_list.append('The pack has not been downloaded from "%s".\n' % (repo_url)) |
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message_list.append('Errors:') |
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for pack, value in result.items(): |
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success, error = value |
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message_list.append(error) |
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message = '\n'.join(message_list) |
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raise Exception(message) |
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return sanitized_result |
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@staticmethod |
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def _get_pack_name_and_url(name_or_url, exchange_url): |
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if len(name_or_url.split('/')) == 1: |
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return (name_or_url, "{}/{}.git".format(exchange_url, name_or_url)) |
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else: |
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return (DownloadGitRepoAction._eval_repo_name(name_or_url), |
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DownloadGitRepoAction._eval_repo_url(name_or_url)) |
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@staticmethod |
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def _eval_repo_url(repo_url): |
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"""Allow passing short GitHub style URLs""" |
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if not repo_url: |
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raise Exception('No valid repo_url provided or could be inferred.') |
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has_git_extension = repo_url.endswith('.git') |
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if len(repo_url.split('/')) == 2 and "git@" not in repo_url: |
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url = "https://github.com/{}".format(repo_url) |
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else: |
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url = repo_url |
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return url if has_git_extension else "{}.git".format(url) |
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@staticmethod |
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def _eval_repo_name(repo_url): |
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""" |
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Evaluate the name of the repo. |
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https://github.com/StackStorm/st2contrib.git -> st2contrib |
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https://github.com/StackStorm/st2contrib -> st2contrib |
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[email protected]:StackStorm/st2contrib.git -> st2contrib |
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[email protected]:StackStorm/st2contrib -> st2contrib |
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""" |
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last_forward_slash = repo_url.rfind('/') |
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next_dot = repo_url.find('.', last_forward_slash) |
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# If dot does not follow last_forward_slash return till the end |
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if next_dot < last_forward_slash: |
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return repo_url[last_forward_slash + 1:] |
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return repo_url[last_forward_slash + 1:next_dot] |
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StackStorm /
st2
