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Viewing changes to breezy/git/annotate.py

  • Committer: Jelmer Vernooij
  • Date: 2018-11-11 04:08:32 UTC
  • mto: (7143.16.20 even-more-cleanups)
  • mto: This revision was merged to the branch mainline in revision 7175.
  • Revision ID: jelmer@jelmer.uk-20181111040832-nsljjynzzwmznf3h
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breezy/git/annotate.py
 
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# Copyright (C) 2018 Jelmer Vernooij <jelmer@jelmer.uk>
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""Annotate."""
 
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from __future__ import absolute_import
 
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from dulwich.object_store import (
 
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    tree_lookup_path,
 
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    )
 
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from ..errors import UnavailableRepresentation
 
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from ..graph import Graph
 
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from ..revision import (
 
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    NULL_REVISION,
 
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    )
 
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class GitFulltextContentFactory(object):
 
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    """Static data content factory.
 
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    This takes a fulltext when created and just returns that during
 
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    get_bytes_as('fulltext').
 
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    :ivar sha1: None, or the sha1 of the content fulltext.
 
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    :ivar storage_kind: The native storage kind of this factory. Always
 
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        'fulltext'.
 
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    :ivar key: The key of this content. Each key is a tuple with a single
 
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        string in it.
 
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    :ivar parents: A tuple of parent keys for self.key. If the object has
 
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        no parent information, None (as opposed to () for an empty list of
 
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        parents).
 
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     """
 
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    def __init__(self, store, path, revision, blob_id):
 
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        """Create a ContentFactory."""
 
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        self.store = store
 
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        self.key = (path, revision)
 
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        self.storage_kind = 'fulltext'
 
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        self.parents = None
 
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        self.blob_id = blob_id
 
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    def get_bytes_as(self, storage_kind):
 
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        if storage_kind == 'fulltext':
 
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            return self.store[self.blob_id].as_raw_string()
 
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        elif storage_kind == 'chunked':
 
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            return self.store[self.blob_id].as_raw_chunks()
 
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        raise UnavailableRepresentation(self.key, storage_kind,
 
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                                        'fulltext')
 
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class GitAbsentContentFactory(object):
 
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    """Absent data content factory.
 
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    :ivar sha1: None, or the sha1 of the content fulltext.
 
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    :ivar storage_kind: The native storage kind of this factory. Always
 
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        'fulltext'.
 
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    :ivar key: The key of this content. Each key is a tuple with a single
 
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        string in it.
 
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    :ivar parents: A tuple of parent keys for self.key. If the object has
 
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        no parent information, None (as opposed to () for an empty list of
 
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        parents).
 
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     """
 
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    def __init__(self, store, path, revision):
 
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        """Create a ContentFactory."""
 
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        self.store = store
 
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        self.key = (path, revision)
 
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        self.storage_kind = 'absent'
 
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        self.parents = None
 
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    def get_bytes_as(self, storage_kind):
 
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        raise ValueError
 
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class AnnotateProvider(object):
 
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    def __init__(self, change_scanner):
 
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        self.change_scanner = change_scanner
 
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        self.store = self.change_scanner.repository._git.object_store
 
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    def _get_parents(self, path, text_revision):
 
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        commit_id, mapping = self.change_scanner.repository.lookup_bzr_revision_id(
 
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            text_revision)
 
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        text_parents = []
 
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        for commit_parent in self.store[commit_id].parents:
 
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            try:
 
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                (path, text_parent) = self.change_scanner.find_last_change_revision(
 
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                    path.encode('utf-8'), commit_parent)
 
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            except KeyError:
 
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                continue
 
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            if text_parent not in text_parents:
 
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                text_parents.append(text_parent)
 
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        return tuple([(path.decode('utf-8'),
 
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                       self.change_scanner.repository.lookup_foreign_revision_id(p)) for p
 
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                      in text_parents])
 
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    def get_parent_map(self, keys):
 
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        ret = {}
 
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        for key in keys:
 
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            (path, text_revision) = key
 
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            if text_revision == NULL_REVISION:
 
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                ret[key] = ()
 
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                continue
 
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            try:
 
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                ret[key] = self._get_parents(path, text_revision)
 
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            except KeyError:
 
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                pass
 
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        return ret
 
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    def get_record_stream(self, keys, ordering, include_delta_closure):
 
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        if ordering == 'topological':
 
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            graph = Graph(self)
 
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            keys = graph.iter_topo_order(keys)
 
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        store = self.change_scanner.repository._git.object_store
 
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        for (path, text_revision) in keys:
 
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            try:
 
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                commit_id, mapping = self.change_scanner.repository.lookup_bzr_revision_id(
 
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                    text_revision)
 
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            except errors.NoSuchRevision:
 
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                yield GitAbsentContentFactory(store, path, text_revision)
 
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                continue
 
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            try:
 
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                tree_id = store[commit_id].tree
 
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            except KeyError:
 
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                yield GitAbsentContentFactory(store, path, text_revision)
 
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                continue
 
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            try:
 
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                (mode, blob_sha) = tree_lookup_path(
 
144
                    store.__getitem__, tree_id, path.encode('utf-8'))
 
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            except KeyError:
 
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                yield GitAbsentContentFactory(store, path, text_revision)
 
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            else:
 
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                yield GitFulltextContentFactory(store, path, text_revision, blob_sha)