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base.py
1038 lines | 30.6 KiB | text/x-python | PythonLexer
# -*- coding: utf-8 -*-
"""
vcs.backends.base
~~~~~~~~~~~~~~~~~
Base for all available scm backends
:created_on: Apr 8, 2010
:copyright: (c) 2010-2011 by Marcin Kuzminski, Lukasz Balcerzak.
"""
import datetime
import itertools
from rhodecode.lib.vcs.utils import author_name, author_email, safe_unicode
from rhodecode.lib.vcs.utils.lazy import LazyProperty
from rhodecode.lib.vcs.utils.helpers import get_dict_for_attrs
from rhodecode.lib.vcs.conf import settings
from rhodecode.lib.vcs.exceptions import (
ChangesetError, EmptyRepositoryError, NodeAlreadyAddedError,
NodeAlreadyChangedError, NodeAlreadyExistsError, NodeAlreadyRemovedError,
NodeDoesNotExistError, NodeNotChangedError, RepositoryError
)
class BaseRepository(object):
"""
Base Repository for final backends
**Attributes**
``DEFAULT_BRANCH_NAME``
name of default branch (i.e. "trunk" for svn, "master" for git etc.
``scm``
alias of scm, i.e. *git* or *hg*
``repo``
object from external api
``revisions``
list of all available revisions' ids, in ascending order
``changesets``
storage dict caching returned changesets
``path``
absolute path to the repository
``branches``
branches as list of changesets
``tags``
tags as list of changesets
"""
scm = None
DEFAULT_BRANCH_NAME = None
EMPTY_CHANGESET = '0' * 40
def __init__(self, repo_path, create=False, **kwargs):
"""
Initializes repository. Raises RepositoryError if repository could
not be find at the given ``repo_path`` or directory at ``repo_path``
exists and ``create`` is set to True.
:param repo_path: local path of the repository
:param create=False: if set to True, would try to craete repository.
:param src_url=None: if set, should be proper url from which repository
would be cloned; requires ``create`` parameter to be set to True -
raises RepositoryError if src_url is set and create evaluates to
False
"""
raise NotImplementedError
def __str__(self):
return '<%s at %s>' % (self.__class__.__name__, self.path)
def __repr__(self):
return self.__str__()
def __len__(self):
return self.count()
def __eq__(self, other):
same_instance = isinstance(other, self.__class__)
return same_instance and getattr(other, 'path', None) == self.path
def __ne__(self, other):
return not self.__eq__(other)
@LazyProperty
def alias(self):
for k, v in settings.BACKENDS.items():
if v.split('.')[-1] == str(self.__class__.__name__):
return k
@LazyProperty
def name(self):
raise NotImplementedError
@property
def name_unicode(self):
return safe_unicode(self.name)
@LazyProperty
def owner(self):
raise NotImplementedError
@LazyProperty
def description(self):
raise NotImplementedError
@LazyProperty
def size(self):
"""
Returns combined size in bytes for all repository files
"""
size = 0
try:
tip = self.get_changeset()
for topnode, dirs, files in tip.walk('/'):
for f in files:
size += tip.get_file_size(f.path)
for dir in dirs:
for f in files:
size += tip.get_file_size(f.path)
except RepositoryError, e:
pass
return size
def is_valid(self):
"""
Validates repository.
"""
raise NotImplementedError
def is_empty(self):
return self._empty
def get_last_change(self):
self.get_changesets()
#==========================================================================
# CHANGESETS
#==========================================================================
def get_changeset(self, revision=None):
"""
Returns instance of ``Changeset`` class. If ``revision`` is None, most
recent changeset is returned.
:raises ``EmptyRepositoryError``: if there are no revisions
"""
raise NotImplementedError
def __iter__(self):
"""
Allows Repository objects to be iterated.
*Requires* implementation of ``__getitem__`` method.
"""
for revision in self.revisions:
yield self.get_changeset(revision)
def get_changesets(self, start=None, end=None, start_date=None,
end_date=None, branch_name=None, reverse=False):
"""
Returns iterator of ``MercurialChangeset`` objects from start to end
not inclusive This should behave just like a list, ie. end is not
inclusive
:param start: None or str
:param end: None or str
:param start_date:
:param end_date:
:param branch_name:
:param reversed:
"""
raise NotImplementedError
def __getslice__(self, i, j):
"""
Returns a iterator of sliced repository
"""
for rev in self.revisions[i:j]:
yield self.get_changeset(rev)
def __getitem__(self, key):
return self.get_changeset(key)
def count(self):
return len(self.revisions)
def tag(self, name, user, revision=None, message=None, date=None, **opts):
"""
Creates and returns a tag for the given ``revision``.
:param name: name for new tag
:param user: full username, i.e.: "Joe Doe <joe.doe@example.com>"
:param revision: changeset id for which new tag would be created
:param message: message of the tag's commit
:param date: date of tag's commit
:raises TagAlreadyExistError: if tag with same name already exists
"""
raise NotImplementedError
def remove_tag(self, name, user, message=None, date=None):
"""
Removes tag with the given ``name``.
:param name: name of the tag to be removed
:param user: full username, i.e.: "Joe Doe <joe.doe@example.com>"
:param message: message of the tag's removal commit
:param date: date of tag's removal commit
:raises TagDoesNotExistError: if tag with given name does not exists
"""
raise NotImplementedError
def get_diff(self, rev1, rev2, path=None, ignore_whitespace=False,
context=3):
"""
Returns (git like) *diff*, as plain text. Shows changes introduced by
``rev2`` since ``rev1``.
:param rev1: Entry point from which diff is shown. Can be
``self.EMPTY_CHANGESET`` - in this case, patch showing all
the changes since empty state of the repository until ``rev2``
:param rev2: Until which revision changes should be shown.
:param ignore_whitespace: If set to ``True``, would not show whitespace
changes. Defaults to ``False``.
:param context: How many lines before/after changed lines should be
shown. Defaults to ``3``.
"""
raise NotImplementedError
# ========== #
# COMMIT API #
# ========== #
@LazyProperty
def in_memory_changeset(self):
"""
Returns ``InMemoryChangeset`` object for this repository.
"""
raise NotImplementedError
def add(self, filenode, **kwargs):
"""
Commit api function that will add given ``FileNode`` into this
repository.
:raises ``NodeAlreadyExistsError``: if there is a file with same path
already in repository
:raises ``NodeAlreadyAddedError``: if given node is already marked as
*added*
"""
raise NotImplementedError
def remove(self, filenode, **kwargs):
"""
Commit api function that will remove given ``FileNode`` into this
repository.
:raises ``EmptyRepositoryError``: if there are no changesets yet
:raises ``NodeDoesNotExistError``: if there is no file with given path
"""
raise NotImplementedError
def commit(self, message, **kwargs):
"""
Persists current changes made on this repository and returns newly
created changeset.
:raises ``NothingChangedError``: if no changes has been made
"""
raise NotImplementedError
def get_state(self):
"""
Returns dictionary with ``added``, ``changed`` and ``removed`` lists
containing ``FileNode`` objects.
"""
raise NotImplementedError
def get_config_value(self, section, name, config_file=None):
"""
Returns configuration value for a given [``section``] and ``name``.
:param section: Section we want to retrieve value from
:param name: Name of configuration we want to retrieve
:param config_file: A path to file which should be used to retrieve
configuration from (might also be a list of file paths)
"""
raise NotImplementedError
def get_user_name(self, config_file=None):
"""
Returns user's name from global configuration file.
:param config_file: A path to file which should be used to retrieve
configuration from (might also be a list of file paths)
"""
raise NotImplementedError
def get_user_email(self, config_file=None):
"""
Returns user's email from global configuration file.
:param config_file: A path to file which should be used to retrieve
configuration from (might also be a list of file paths)
"""
raise NotImplementedError
# =========== #
# WORKDIR API #
# =========== #
@LazyProperty
def workdir(self):
"""
Returns ``Workdir`` instance for this repository.
"""
raise NotImplementedError
class BaseChangeset(object):
"""
Each backend should implement it's changeset representation.
**Attributes**
``repository``
repository object within which changeset exists
``id``
may be ``raw_id`` or i.e. for mercurial's tip just ``tip``
``raw_id``
raw changeset representation (i.e. full 40 length sha for git
backend)
``short_id``
shortened (if apply) version of ``raw_id``; it would be simple
shortcut for ``raw_id[:12]`` for git/mercurial backends or same
as ``raw_id`` for subversion
``revision``
revision number as integer
``files``
list of ``FileNode`` (``Node`` with NodeKind.FILE) objects
``dirs``
list of ``DirNode`` (``Node`` with NodeKind.DIR) objects
``nodes``
combined list of ``Node`` objects
``author``
author of the changeset, as unicode
``message``
message of the changeset, as unicode
``parents``
list of parent changesets
``last``
``True`` if this is last changeset in repository, ``False``
otherwise; trying to access this attribute while there is no
changesets would raise ``EmptyRepositoryError``
"""
def __str__(self):
return '<%s at %s:%s>' % (self.__class__.__name__, self.revision,
self.short_id)
def __repr__(self):
return self.__str__()
def __unicode__(self):
return u'%s:%s' % (self.revision, self.short_id)
def __eq__(self, other):
return self.raw_id == other.raw_id
def __json__(self):
return dict(
short_id=self.short_id,
raw_id=self.raw_id,
revision=self.revision,
message=self.message,
date=self.date,
author=self.author,
)
@LazyProperty
def last(self):
if self.repository is None:
raise ChangesetError("Cannot check if it's most recent revision")
return self.raw_id == self.repository.revisions[-1]
@LazyProperty
def parents(self):
"""
Returns list of parents changesets.
"""
raise NotImplementedError
@LazyProperty
def children(self):
"""
Returns list of children changesets.
"""
raise NotImplementedError
@LazyProperty
def id(self):
"""
Returns string identifying this changeset.
"""
raise NotImplementedError
@LazyProperty
def raw_id(self):
"""
Returns raw string identifying this changeset.
"""
raise NotImplementedError
@LazyProperty
def short_id(self):
"""
Returns shortened version of ``raw_id`` attribute, as string,
identifying this changeset, useful for web representation.
"""
raise NotImplementedError
@LazyProperty
def revision(self):
"""
Returns integer identifying this changeset.
"""
raise NotImplementedError
@LazyProperty
def committer(self):
"""
Returns Committer for given commit
"""
raise NotImplementedError
@LazyProperty
def committer_name(self):
"""
Returns Author name for given commit
"""
return author_name(self.committer)
@LazyProperty
def committer_email(self):
"""
Returns Author email address for given commit
"""
return author_email(self.committer)
@LazyProperty
def author(self):
"""
Returns Author for given commit
"""
raise NotImplementedError
@LazyProperty
def author_name(self):
"""
Returns Author name for given commit
"""
return author_name(self.author)
@LazyProperty
def author_email(self):
"""
Returns Author email address for given commit
"""
return author_email(self.author)
def get_file_mode(self, path):
"""
Returns stat mode of the file at the given ``path``.
"""
raise NotImplementedError
def get_file_content(self, path):
"""
Returns content of the file at the given ``path``.
"""
raise NotImplementedError
def get_file_size(self, path):
"""
Returns size of the file at the given ``path``.
"""
raise NotImplementedError
def get_file_changeset(self, path):
"""
Returns last commit of the file at the given ``path``.
"""
raise NotImplementedError
def get_file_history(self, path):
"""
Returns history of file as reversed list of ``Changeset`` objects for
which file at given ``path`` has been modified.
"""
raise NotImplementedError
def get_nodes(self, path):
"""
Returns combined ``DirNode`` and ``FileNode`` objects list representing
state of changeset at the given ``path``.
:raises ``ChangesetError``: if node at the given ``path`` is not
instance of ``DirNode``
"""
raise NotImplementedError
def get_node(self, path):
"""
Returns ``Node`` object from the given ``path``.
:raises ``NodeDoesNotExistError``: if there is no node at the given
``path``
"""
raise NotImplementedError
def fill_archive(self, stream=None, kind='tgz', prefix=None):
"""
Fills up given stream.
:param stream: file like object.
:param kind: one of following: ``zip``, ``tar``, ``tgz``
or ``tbz2``. Default: ``tgz``.
:param prefix: name of root directory in archive.
Default is repository name and changeset's raw_id joined with dash.
repo-tip.<kind>
"""
raise NotImplementedError
def get_chunked_archive(self, **kwargs):
"""
Returns iterable archive. Tiny wrapper around ``fill_archive`` method.
:param chunk_size: extra parameter which controls size of returned
chunks. Default:8k.
"""
chunk_size = kwargs.pop('chunk_size', 8192)
stream = kwargs.get('stream')
self.fill_archive(**kwargs)
while True:
data = stream.read(chunk_size)
if not data:
break
yield data
@LazyProperty
def root(self):
"""
Returns ``RootNode`` object for this changeset.
"""
return self.get_node('')
def next(self, branch=None):
"""
Returns next changeset from current, if branch is gives it will return
next changeset belonging to this branch
:param branch: show changesets within the given named branch
"""
raise NotImplementedError
def prev(self, branch=None):
"""
Returns previous changeset from current, if branch is gives it will
return previous changeset belonging to this branch
:param branch: show changesets within the given named branch
"""
raise NotImplementedError
@LazyProperty
def added(self):
"""
Returns list of added ``FileNode`` objects.
"""
raise NotImplementedError
@LazyProperty
def changed(self):
"""
Returns list of modified ``FileNode`` objects.
"""
raise NotImplementedError
@LazyProperty
def removed(self):
"""
Returns list of removed ``FileNode`` objects.
"""
raise NotImplementedError
@LazyProperty
def size(self):
"""
Returns total number of bytes from contents of all filenodes.
"""
return sum((node.size for node in self.get_filenodes_generator()))
def walk(self, topurl=''):
"""
Similar to os.walk method. Insted of filesystem it walks through
changeset starting at given ``topurl``. Returns generator of tuples
(topnode, dirnodes, filenodes).
"""
topnode = self.get_node(topurl)
yield (topnode, topnode.dirs, topnode.files)
for dirnode in topnode.dirs:
for tup in self.walk(dirnode.path):
yield tup
def get_filenodes_generator(self):
"""
Returns generator that yields *all* file nodes.
"""
for topnode, dirs, files in self.walk():
for node in files:
yield node
def as_dict(self):
"""
Returns dictionary with changeset's attributes and their values.
"""
data = get_dict_for_attrs(self, ['id', 'raw_id', 'short_id',
'revision', 'date', 'message'])
data['author'] = {'name': self.author_name, 'email': self.author_email}
data['added'] = [node.path for node in self.added]
data['changed'] = [node.path for node in self.changed]
data['removed'] = [node.path for node in self.removed]
return data
class BaseWorkdir(object):
"""
Working directory representation of single repository.
:attribute: repository: repository object of working directory
"""
def __init__(self, repository):
self.repository = repository
def get_branch(self):
"""
Returns name of current branch.
"""
raise NotImplementedError
def get_changeset(self):
"""
Returns current changeset.
"""
raise NotImplementedError
def get_added(self):
"""
Returns list of ``FileNode`` objects marked as *new* in working
directory.
"""
raise NotImplementedError
def get_changed(self):
"""
Returns list of ``FileNode`` objects *changed* in working directory.
"""
raise NotImplementedError
def get_removed(self):
"""
Returns list of ``RemovedFileNode`` objects marked as *removed* in
working directory.
"""
raise NotImplementedError
def get_untracked(self):
"""
Returns list of ``FileNode`` objects which are present within working
directory however are not tracked by repository.
"""
raise NotImplementedError
def get_status(self):
"""
Returns dict with ``added``, ``changed``, ``removed`` and ``untracked``
lists.
"""
raise NotImplementedError
def commit(self, message, **kwargs):
"""
Commits local (from working directory) changes and returns newly
created
``Changeset``. Updates repository's ``revisions`` list.
:raises ``CommitError``: if any error occurs while committing
"""
raise NotImplementedError
def update(self, revision=None):
"""
Fetches content of the given revision and populates it within working
directory.
"""
raise NotImplementedError
def checkout_branch(self, branch=None):
"""
Checks out ``branch`` or the backend's default branch.
Raises ``BranchDoesNotExistError`` if the branch does not exist.
"""
raise NotImplementedError
class BaseInMemoryChangeset(object):
"""
Represents differences between repository's state (most recent head) and
changes made *in place*.
**Attributes**
``repository``
repository object for this in-memory-changeset
``added``
list of ``FileNode`` objects marked as *added*
``changed``
list of ``FileNode`` objects marked as *changed*
``removed``
list of ``FileNode`` or ``RemovedFileNode`` objects marked to be
*removed*
``parents``
list of ``Changeset`` representing parents of in-memory changeset.
Should always be 2-element sequence.
"""
def __init__(self, repository):
self.repository = repository
self.added = []
self.changed = []
self.removed = []
self.parents = []
def add(self, *filenodes):
"""
Marks given ``FileNode`` objects as *to be committed*.
:raises ``NodeAlreadyExistsError``: if node with same path exists at
latest changeset
:raises ``NodeAlreadyAddedError``: if node with same path is already
marked as *added*
"""
# Check if not already marked as *added* first
for node in filenodes:
if node.path in (n.path for n in self.added):
raise NodeAlreadyAddedError("Such FileNode %s is already "
"marked for addition" % node.path)
for node in filenodes:
self.added.append(node)
def change(self, *filenodes):
"""
Marks given ``FileNode`` objects to be *changed* in next commit.
:raises ``EmptyRepositoryError``: if there are no changesets yet
:raises ``NodeAlreadyExistsError``: if node with same path is already
marked to be *changed*
:raises ``NodeAlreadyRemovedError``: if node with same path is already
marked to be *removed*
:raises ``NodeDoesNotExistError``: if node doesn't exist in latest
changeset
:raises ``NodeNotChangedError``: if node hasn't really be changed
"""
for node in filenodes:
if node.path in (n.path for n in self.removed):
raise NodeAlreadyRemovedError("Node at %s is already marked "
"as removed" % node.path)
try:
self.repository.get_changeset()
except EmptyRepositoryError:
raise EmptyRepositoryError("Nothing to change - try to *add* new "
"nodes rather than changing them")
for node in filenodes:
if node.path in (n.path for n in self.changed):
raise NodeAlreadyChangedError("Node at '%s' is already "
"marked as changed" % node.path)
self.changed.append(node)
def remove(self, *filenodes):
"""
Marks given ``FileNode`` (or ``RemovedFileNode``) objects to be
*removed* in next commit.
:raises ``NodeAlreadyRemovedError``: if node has been already marked to
be *removed*
:raises ``NodeAlreadyChangedError``: if node has been already marked to
be *changed*
"""
for node in filenodes:
if node.path in (n.path for n in self.removed):
raise NodeAlreadyRemovedError("Node is already marked to "
"for removal at %s" % node.path)
if node.path in (n.path for n in self.changed):
raise NodeAlreadyChangedError("Node is already marked to "
"be changed at %s" % node.path)
# We only mark node as *removed* - real removal is done by
# commit method
self.removed.append(node)
def reset(self):
"""
Resets this instance to initial state (cleans ``added``, ``changed``
and ``removed`` lists).
"""
self.added = []
self.changed = []
self.removed = []
self.parents = []
def get_ipaths(self):
"""
Returns generator of paths from nodes marked as added, changed or
removed.
"""
for node in itertools.chain(self.added, self.changed, self.removed):
yield node.path
def get_paths(self):
"""
Returns list of paths from nodes marked as added, changed or removed.
"""
return list(self.get_ipaths())
def check_integrity(self, parents=None):
"""
Checks in-memory changeset's integrity. Also, sets parents if not
already set.
:raises CommitError: if any error occurs (i.e.
``NodeDoesNotExistError``).
"""
if not self.parents:
parents = parents or []
if len(parents) == 0:
try:
parents = [self.repository.get_changeset(), None]
except EmptyRepositoryError:
parents = [None, None]
elif len(parents) == 1:
parents += [None]
self.parents = parents
# Local parents, only if not None
parents = [p for p in self.parents if p]
# Check nodes marked as added
for p in parents:
for node in self.added:
try:
p.get_node(node.path)
except NodeDoesNotExistError:
pass
else:
raise NodeAlreadyExistsError("Node at %s already exists "
"at %s" % (node.path, p))
# Check nodes marked as changed
missing = set(self.changed)
not_changed = set(self.changed)
if self.changed and not parents:
raise NodeDoesNotExistError(str(self.changed[0].path))
for p in parents:
for node in self.changed:
try:
old = p.get_node(node.path)
missing.remove(node)
# if content actually changed, remove node from unchanged
if old.content != node.content:
not_changed.remove(node)
except NodeDoesNotExistError:
pass
if self.changed and missing:
raise NodeDoesNotExistError("Node at %s is missing "
"(parents: %s)" % (node.path, parents))
if self.changed and not_changed:
raise NodeNotChangedError("Node at %s wasn't actually changed "
"since parents' changesets: %s" % (not_changed.pop().path,
parents)
)
# Check nodes marked as removed
if self.removed and not parents:
raise NodeDoesNotExistError("Cannot remove node at %s as there "
"were no parents specified" % self.removed[0].path)
really_removed = set()
for p in parents:
for node in self.removed:
try:
p.get_node(node.path)
really_removed.add(node)
except ChangesetError:
pass
not_removed = set(self.removed) - really_removed
if not_removed:
raise NodeDoesNotExistError("Cannot remove node at %s from "
"following parents: %s" % (not_removed[0], parents))
def commit(self, message, author, parents=None, branch=None, date=None,
**kwargs):
"""
Performs in-memory commit (doesn't check workdir in any way) and
returns newly created ``Changeset``. Updates repository's
``revisions``.
.. note::
While overriding this method each backend's should call
``self.check_integrity(parents)`` in the first place.
:param message: message of the commit
:param author: full username, i.e. "Joe Doe <joe.doe@example.com>"
:param parents: single parent or sequence of parents from which commit
would be derieved
:param date: ``datetime.datetime`` instance. Defaults to
``datetime.datetime.now()``.
:param branch: branch name, as string. If none given, default backend's
branch would be used.
:raises ``CommitError``: if any error occurs while committing
"""
raise NotImplementedError
class EmptyChangeset(BaseChangeset):
"""
An dummy empty changeset. It's possible to pass hash when creating
an EmptyChangeset
"""
def __init__(self, cs='0' * 40, repo=None, requested_revision=None,
alias=None, revision=-1, message='', author='', date=None):
self._empty_cs = cs
self.revision = revision
self.message = message
self.author = author
self.date = date or datetime.datetime.fromtimestamp(0)
self.repository = repo
self.requested_revision = requested_revision
self.alias = alias
@LazyProperty
def raw_id(self):
"""
Returns raw string identifying this changeset, useful for web
representation.
"""
return self._empty_cs
@LazyProperty
def branch(self):
from rhodecode.lib.vcs.backends import get_backend
return get_backend(self.alias).DEFAULT_BRANCH_NAME
@LazyProperty
def short_id(self):
return self.raw_id[:12]
def get_file_changeset(self, path):
return self
def get_file_content(self, path):
return u''
def get_file_size(self, path):
return 0
class CollectionGenerator(object):
def __init__(self, repo, revs):
self.repo = repo
self.revs = revs
def __len__(self):
return len(self.revs)
def __iter__(self):
for rev in self.revs:
yield self.repo.get_changeset(rev)
def __getslice__(self, i, j):
"""
Returns a iterator of sliced repository
"""
sliced_revs = self.revs[i:j]
return CollectionGenerator(self.repo, sliced_revs)
def __repr__(self):
return '<CollectionGenerator[len:%s]>' % (len(self))