# Software License Agreement (BSD License) # # Copyright (c) 2010, Willow Garage, Inc. # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # * Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # * Redistributions in binary form must reproduce the above # copyright notice, this list of conditions and the following # disclaimer in the documentation and/or other materials provided # with the distribution. # * Neither the name of Willow Garage, Inc. nor the names of its # contributors may be used to endorse or promote products derived # from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # """ vcs support library base class. """ from __future__ import absolute_import, print_function, unicode_literals import os import logging __pychecker__ = 'unusednames=spec,url,version,basepath,untracked' class VcsError(Exception): """To be thrown when an SCM Client faces a situation because of a violated assumption""" def __init__(self, value): super(VcsError, self).__init__(value) self.value = value def __str__(self): return repr(self.value) class VcsClientBase(object): """ parent class for all vcs clients, provides their public API """ def __init__(self, vcs_type_name, path): """ subclasses may raise VcsError when a dependency is missing """ self._path = path if path is None: raise VcsError("Cannot initialize VCSclient without path") self._vcs_type_name = vcs_type_name self.logger = logging.getLogger('vcstools') @staticmethod def get_environment_metadata(): """ For debugging purposes, returns a dict containing information about the environment, like the version of the SCM client, or version of libraries involved. Suggest considering keywords "version", "dependency", "features" first. :returns: a dict containing relevant information :rtype: dict """ raise NotImplementedError( "Base class get_environment_metadata method must be overridden") def path_exists(self): """ helper function """ return os.path.exists(self._path) def get_path(self): """ returns the path this client was configured for """ return self._path def url_matches(self, url, url_or_shortcut): """ client can decide whether the url and the other url are equivalent. Checks string equality by default :param url_or_shortcut: url or shortcut (e.g. bzr launchpad url) :returns: bool if params are equivalent """ if url is None or url_or_shortcut is None: return False return url.rstrip('/') == url_or_shortcut.rstrip('/') def get_url(self): """ :returns: The source control url for the path or None if not set :rtype: str """ raise NotImplementedError( "Base class get_url method must be overridden for client type %s" % self._vcs_type_name) def get_version(self, spec=None): """ Find an identifier for a the current or a specified revision. Token spec might be a tagname, branchname, version-id, SHA-ID, ... depending on the VCS implementation. :param spec: token for identifying repository revision :type spec: str :returns: current revision number of the repository. Or if spec is provided, the respective revision number. :rtype: str """ raise NotImplementedError("Base class get_version method must be overridden for client type %s " % self._vcs_type_name) def get_current_version_label(self): """ Find an description for the current local version. Token spec might be a branchname, version-id, SHA-ID, ... depending on the VCS implementation. :returns: short description of local version (e.g. branchname, tagename). :rtype: str """ raise NotImplementedError("Base class get_current_version method must be overridden for client type %s " % self._vcs_type_name) def get_remote_version(self, fetch=False): """ Find an identifier for the current revision on remote. Token spec might be a tagname, version-id, SHA-ID, ... depending on the VCS implementation. :param fetch: if False, only local information may be used :returns: current revision number of the remote repository. :rtype: str """ raise NotImplementedError("Base class get_remote_version method must be overridden for client type %s " % self._vcs_type_name) def get_default_remote_version_label(self): """ Find a label for the default branch on remote, meaning the one that would be checked out on a clean checkout. :returns: a label or None (if not applicable) :rtype: str """ raise NotImplementedError("Base class get_default_remote_version_label" + "method must be overridden for client type %s " % self._vcs_type_name) def checkout(self, url, version=None, verbose=False, shallow=False, timeout=None): """ Attempts to create a local repository given a remote url. Fails if a target path exists, unless it's an empty directory. If a version is provided, the local repository will be updated to that revision. It is possible that after a failed call to checkout, a repository still exists, e.g. if an invalid revision was given. If shallow is provided, the scm client may checkout less than the full repository history to save time / disk space. If a timeout is specified, any pending operation will fail after the specified amount (in seconds). NOTE: this parameter might or might not be honored, depending on VCS client implementation. :param url: where to checkout from :type url: str :param version: token for identifying repository revision :type version: str :param shallow: hint to checkout less than a full repository :type shallow: bool :param timeout: maximum allocated time to perform operation :type shallow: int :returns: True if successful """ raise NotImplementedError("Base class checkout method must be overridden for client type %s " % self._vcs_type_name) def update(self, version=None, verbose=False, timeout=None): """ Sets the local copy of the repository to a version matching the version parameter. Fails when there are uncommited changes. On failures (also e.g. network failure) grants the checked out files are in the same state as before the call. If a timeout is specified, any pending operation will fail after the specified amount (in seconds) :param version: token for identifying repository revision desired. Token might be a tagname, branchname, version-id, SHA-ID, ... depending on the VCS implementation. :param timeout: maximum allocated time to perform operation :type shallow: int :returns: True on success, False else """ raise NotImplementedError("Base class update method must be overridden for client type %s " % self._vcs_type_name) @staticmethod def static_detect_presence(path): """For auto detection""" raise NotImplementedError( "Base class detect_presence method must be overridden") def detect_presence(self): """For auto detection""" # call static method return self.static_detect_presence(self._path) def get_vcs_type_name(self): """ used when auto detected """ return self._vcs_type_name def get_diff(self, basepath=None): """ :param basepath: diff paths will be relative to this, if any :returns: A string showing local differences :rtype: str """ raise NotImplementedError( "Base class get_diff method must be overridden") def get_status(self, basepath=None, untracked=False, **kwargs): """ Calls scm status command. Output must be terminated by newline unless empty. Semantics of untracked are difficult to generalize. In SVN, this would be new files only. In git, hg, bzr, this would be changes that have not been added for commit. Extra keyword arguments are passed along to the underlying vcs code. See the specific implementations of get_status() for extra options. :param basepath: status path will be relative to this, if any :param untracked: whether to also show changes that would not commit :returns: A string summarizing locally modified files :rtype: str """ raise NotImplementedError("Base class get_status method must be overridden for client type %s " % self._vcs_type_name) def get_affected_files(self, revision): """ Get the files that were affected by a specific revision :param revision: SHA or revision number. :returns: A list of strings with the files affected by a specific commit """ raise NotImplemented( "Base class get_affected_files method must be overriden") def get_log(self, relpath=None, limit=None): """ Calls scm log command. This returns a list of dictionaries with the following fields: - id: the commit SHA or revision number - date: the date the commit was made (python datetime) - author: the name of the author of the commit, if available - email: the e-mail address of the author of the commit - message: the commit message, if any :param relpath: (optional) restrict logs to events on this resource path (folder or file) relative to the root of the repository. If None (default), this is the root of the repository. :param limit: (optional) the maximum number of log entries that should be retrieved. If None (default), there is no limit. """ raise NotImplementedError( "Base class get_log method must be overridden") def export_repository(self, version, basepath): """ Calls scm equivalent to `svn export`, removing scm meta information and tar gzip'ing the repository at a given version to the given basepath. :param version: version of the repository to export. This can be a branch, tag, or path (svn). When specifying the version as a path for svn, the path should be relative to the root of the svn repository, i.e. 'trunk', or 'tags/1.2.3', or './' for the root. :param basepath: this is the path to the tar gzip, excluding the extension which will be .tar.gz :returns: True on success, False otherwise. """ raise NotImplementedError("Base class export_repository method must be overridden for client type %s " % self._vcs_type_name) def get_branches(self, local_only=False): """ Returns a list of all branches in the vcs repository. :param local_only: if True it will only list local branches :returns: list of branches in the repository, [] if none exist """ raise NotImplementedError("Base class get_branches method must " "be overridden")