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- Committer: Jelmer Vernooij
- Date: 2008-07-25 22:56:43 UTC
- mto: (0.312.1 master) (6883.23.1 bundle-git)
- mto: This revision was merged to the branch mainline in revision 6960.
- Revision ID: jelmer@samba.org-20080725225643-o8adohxgoruo3goj
Switch to using GitPython rather than our own in-house stuff.
- files added:
- cache.py
- files removed:
- HACKING
- notes
- files renamed:
- branch.py => git_branch.py
- dir.py => git_dir.py
- repository.py => git_repository.py
- mapping.py => ids.py
- tests/test_branch.py => tests/test_git_branch.py
- tests/test_dir.py => tests/test_git_dir.py
- tests/test_repository.py => tests/test_git_repository.py
- tests/test_mapping.py => tests/test_ids.py
- files modified:
- .bzrignore
added
removed
git_repository.py
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1
# Copyright (C) 2007 Canonical Ltd
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# Copyright (C) 2008-2009 Jelmer Vernooij <jelmer@samba.org>
3
2
#
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3
# This program is free software; you can redistribute it and/or modify
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4
# it under the terms of the GNU General Public License as published by
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18
17
"""An adapter between a Git Repository and a Bazaar Branch"""
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18
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import git
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import os
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22
import bzrlib
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23
from bzrlib import (
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deprecated_graph,
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25
errors,
22
26
inventory,
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osutils,
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28
repository,
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29
revision,
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30
revisiontree,
26
)
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from bzrlib.foreign import (
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ForeignRepository,
29
)
30
31
from bzrlib.plugins.git.commit import (
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GitCommitBuilder,
33
)
34
from bzrlib.plugins.git.mapping import (
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default_mapping,
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foreign_git,
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mapping_registry,
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)
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from bzrlib.plugins.git.tree import (
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GitRevisionTree,
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)
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from bzrlib.plugins.git.versionedfiles import (
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GitRevisions,
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GitTexts,
45
)
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47
48
from dulwich.objects import (
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Commit,
50
)
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52
53
class GitRepository(ForeignRepository):
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urlutils,
32
)
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from bzrlib.transport import get_transport
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35
from bzrlib.plugins.git import (
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cache,
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ids,
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)
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40
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cachedbs = {}
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43
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class GitRepository(repository.Repository):
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"""An adapter to git repositories for bzr."""
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56
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_serializer = None
57
_commit_builder_class = GitCommitBuilder
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vcs = foreign_git
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48
60
49
def __init__(self, gitdir, lockfiles):
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ForeignRepository.__init__(self, GitRepositoryFormat(), gitdir,
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lockfiles)
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from bzrlib.plugins.git import fetch, push
64
for optimiser in [fetch.InterRemoteGitNonGitRepository,
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fetch.InterLocalGitNonGitRepository,
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fetch.InterGitGitRepository,
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push.InterToLocalGitRepository,
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push.InterToRemoteGitRepository]:
69
repository.InterRepository.register_optimiser(optimiser)
50
self.bzrdir = gitdir
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self.control_files = lockfiles
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self._git = git.repo.Repo(gitdir.root_transport.local_abspath("."))
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self._revision_cache = {}
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self._blob_cache = {}
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self._blob_info_cache = {}
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cache_dir = cache.create_cache_dir()
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cachedir_transport = get_transport(cache_dir)
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cache_file = os.path.join(cache_dir, 'cache-%s' % ids.NAMESPACE)
59
if not cachedbs.has_key(cache_file):
60
cachedbs[cache_file] = cache.sqlite3.connect(cache_file)
61
self.cachedb = cachedbs[cache_file]
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self._init_cachedb()
63
self.texts = None
64
self.signatures = None
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self.revisions = None
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self._format = GitFormat()
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68
def _init_cachedb(self):
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self.cachedb.executescript("""
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create table if not exists inventory (
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revid blob);
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create unique index if not exists inventory_revid
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on inventory (revid);
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create table if not exists entry_revision (
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inventory blob,
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path blob,
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gitid blob,
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executable integer,
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revision blob);
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create unique index if not exists entry_revision_revid_path
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on entry_revision (inventory, path);
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""")
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self.cachedb.commit()
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def _ancestor_revisions(self, revision_ids):
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if revision_ids is not None:
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git_revisions = [gitrevid_from_bzr(r) for r in revision_ids]
88
else:
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git_revisions = None
90
for lines in self._git.ancestor_lines(git_revisions):
91
yield self._parse_rev(lines)
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# print "fetched ancestors:", git_revisions
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93
71
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def is_shared(self):
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return False
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return True
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74
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def supports_rich_root(self):
75
return True
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def _warn_if_deprecated(self, branch=None):
78
# This class isn't deprecated
79
pass
80
81
def get_mapping(self):
82
return default_mapping
83
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def make_working_trees(self):
85
return not self._git.bare
86
87
def revision_graph_can_have_wrong_parents(self):
88
98
return False
89
99
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def dfetch(self, source, stop_revision):
91
interrepo = repository.InterRepository.get(source, self)
92
return interrepo.dfetch(stop_revision)
93
94
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class LocalGitRepository(GitRepository):
96
"""Git repository on the file system."""
97
98
def __init__(self, gitdir, lockfiles):
99
GitRepository.__init__(self, gitdir, lockfiles)
100
self.base = gitdir.root_transport.base
101
self._git = gitdir._git
102
self.signatures = None
103
self.revisions = GitRevisions(self, self._git.object_store)
104
self.inventories = None
105
self.texts = GitTexts(self)
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107
def _iter_revision_ids(self):
108
mapping = self.get_mapping()
109
for sha in self._git.object_store:
110
o = self._git.object_store[sha]
111
if not isinstance(o, Commit):
112
continue
113
rev, roundtrip_revid, verifiers = mapping.import_commit(o,
114
self.lookup_foreign_revision_id)
115
yield o.id, rev.revision_id, roundtrip_revid
116
117
def all_revision_ids(self):
118
ret = set([])
119
for git_sha, revid, roundtrip_revid in self._iter_revision_ids():
120
ret.add(revid)
121
if roundtrip_revid:
122
ret.add(roundtrip_revid)
123
return ret
124
125
def get_parent_map(self, revids):
126
parent_map = {}
127
for revision_id in revids:
128
assert isinstance(revision_id, str)
129
if revision_id == revision.NULL_REVISION:
130
parent_map[revision_id] = ()
131
continue
132
hexsha, mapping = self.lookup_bzr_revision_id(revision_id)
133
try:
134
commit = self._git[hexsha]
135
except KeyError:
136
continue
137
parent_map[revision_id] = [
138
self.lookup_foreign_revision_id(p, mapping)
139
for p in commit.parents]
140
return parent_map
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142
def get_ancestry(self, revision_id, topo_sorted=True):
143
"""See Repository.get_ancestry().
144
"""
145
if revision_id is None:
146
return [None, revision.NULL_REVISION] + self._all_revision_ids()
147
assert isinstance(revision_id, str)
148
ancestry = []
149
graph = self.get_graph()
150
for rev, parents in graph.iter_ancestry([revision_id]):
151
ancestry.append(rev)
152
ancestry.reverse()
153
return [None] + ancestry
100
def get_revision_graph(self, revision_id=None):
101
result = {}
102
if revision_id is not None:
103
param = [ids.convert_revision_id_bzr_to_git(revision_id)]
104
else:
105
param = None
106
git_graph = self._git.get_revision_graph(param)
107
# print "fetched revision graph:", param
108
for node, parents in git_graph.iteritems():
109
bzr_node = ids.convert_revision_id_git_to_bzr(node)
110
bzr_parents = [ids.convert_revision_id_git_to_bzr(n)
111
for n in parents]
112
result[bzr_node] = bzr_parents
113
return result
114
115
def get_revision_graph_with_ghosts(self, revision_ids=None):
116
graph = deprecated_graph.Graph()
117
if revision_ids is not None:
118
revision_ids = [ids.convert_revision_id_bzr_to_git(r)
119
for r in revision_ids]
120
git_graph = self._git.get_revision_graph(revision_ids)
121
# print "fetched revision graph (ghosts):", revision_ids
122
for node, parents in git_graph.iteritems():
123
bzr_node = ids.convert_revision_id_git_to_bzr(node)
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bzr_parents = [ids.convert_revision_id_git_to_bzr(n)
125
for n in parents]
126
127
graph.add_node(bzr_node, bzr_parents)
128
return graph
129
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def get_ancestry(self, revision_id):
131
param = [ids.convert_revision_id_bzr_to_git(revision_id)]
132
git_ancestry = self._git.get_ancestry(param)
133
# print "fetched ancestry:", param
134
return [None] + [
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ids.convert_revision_id_git_to_bzr(git_id)
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for git_id in git_ancestry]
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def get_signature_text(self, revision_id):
156
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raise errors.NoSuchRevision(self, revision_id)
157
140
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def pack(self, hint=None, clean_obsolete_packs=False):
159
self._git.object_store.pack_loose_objects()
160
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def lookup_foreign_revision_id(self, foreign_revid, mapping=None):
162
"""Lookup a revision id.
163
164
"""
165
assert type(foreign_revid) is str
166
if mapping is None:
167
mapping = self.get_mapping()
168
from dulwich.protocol import (
169
ZERO_SHA,
170
)
171
if foreign_revid == ZERO_SHA:
172
return revision.NULL_REVISION
173
commit = self._git[foreign_revid]
174
rev, roundtrip_revid, verifiers = mapping.import_commit(commit,
175
lambda x: None)
176
# FIXME: check testament before doing this?
177
if roundtrip_revid:
178
return roundtrip_revid
179
else:
180
return rev.revision_id
181
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def has_signature_for_revision_id(self, revision_id):
183
return False
184
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def lookup_bzr_revision_id(self, bzr_revid, mapping=None):
186
try:
187
return mapping_registry.revision_id_bzr_to_foreign(bzr_revid)
188
except errors.InvalidRevisionId:
189
if mapping is None:
190
mapping = self.get_mapping()
191
try:
192
return (self._git.refs[mapping.revid_as_refname(bzr_revid)],
193
mapping)
194
except KeyError:
195
# Update refs from Git commit objects
196
# FIXME: Hitting this a lot will be very inefficient...
197
for git_sha, revid, roundtrip_revid in self._iter_revision_ids():
198
if not roundtrip_revid:
199
continue
200
refname = mapping.revid_as_refname(roundtrip_revid)
201
self._git.refs[refname] = git_sha
202
if roundtrip_revid == bzr_revid:
203
return git_sha, mapping
204
raise errors.NoSuchRevision(self, bzr_revid)
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206
142
def get_revision(self, revision_id):
207
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
208
try:
209
commit = self._git[git_commit_id]
210
except KeyError:
211
raise errors.NoSuchRevision(self, revision_id)
212
revision, roundtrip_revid, verifiers = mapping.import_commit(
213
commit, self.lookup_foreign_revision_id)
214
assert revision is not None
215
# FIXME: check verifiers ?
216
if roundtrip_revid:
217
revision.revision_id = roundtrip_revid
143
if revision_id in self._revision_cache:
144
return self._revision_cache[revision_id]
145
git_commit_id = ids.convert_revision_id_bzr_to_git(revision_id)
146
raw = self._git.rev_list([git_commit_id], max_count=1, header=True)
147
# print "fetched revision:", git_commit_id
148
revision = self._parse_rev(raw)
149
self._revision_cache[revision_id] = revision
218
150
return revision
219
151
220
152
def has_revision(self, revision_id):
221
153
try:
222
git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)
223
except errors.NoSuchRevision:
154
self.get_revision(revision_id)
155
except NoSuchRevision:
224
156
return False
225
return (git_commit_id in self._git)
226
227
def has_revisions(self, revision_ids):
228
return set(filter(self.has_revision, revision_ids))
229
230
def get_revisions(self, revids):
231
return [self.get_revision(r) for r in revids]
157
else:
158
return True
159
160
def get_revisions(self, revisions):
161
return [self.get_revision(r) for r in revisions]
162
163
@classmethod
164
def _parse_rev(klass, raw):
165
"""Parse a single git revision.
166
167
* The first line is the git commit id.
168
* Following lines conform to the 'name value' structure, until the
169
first blank line.
170
* All lines after the first blank line and until the NULL line have 4
171
leading spaces and constitute the commit message.
172
173
:param raw: sequence of newline-terminated strings, its last item is a
174
single NULL character.
175
:return: a `bzrlib.revision.Revision` object.
176
"""
177
parents = []
178
message_lines = []
179
in_message = False
180
committer_was_set = False
181
revision_id = ids.convert_revision_id_git_to_bzr(raw[0][:-1])
182
rev = revision.Revision(revision_id)
183
rev.inventory_sha1 = ""
184
assert raw[-1] == '\x00', (
185
"Last item of raw was not a single NULL character.")
186
for line in raw[1:-1]:
187
if in_message:
188
assert line[:4] == ' ', (
189
"Unexpected line format in commit message: %r" % line)
190
message_lines.append(line[4:])
191
continue
192
if line == '\n':
193
in_message = True
194
continue
195
name, value = line[:-1].split(' ', 1)
196
if name == 'parent':
197
rev.parent_ids.append(
198
ids.convert_revision_id_git_to_bzr(value))
199
continue
200
if name == 'author':
201
author, timestamp, timezone = value.rsplit(' ', 2)
202
rev.properties['author'] = author
203
rev.properties['git-author-timestamp'] = timestamp
204
rev.properties['git-author-timezone'] = timezone
205
if not committer_was_set:
206
rev.committer = author
207
rev.timestamp = float(timestamp)
208
rev.timezone = klass._parse_tz(timezone)
209
continue
210
if name == 'committer':
211
committer_was_set = True
212
committer, timestamp, timezone = value.rsplit(' ', 2)
213
rev.committer = committer
214
rev.timestamp = float(timestamp)
215
rev.timezone = klass._parse_tz(timezone)
216
continue
217
if name == 'tree':
218
rev.properties['git-tree-id'] = value
219
continue
220
221
rev.message = ''.join(message_lines)
222
223
# XXX: That should not be needed, but current revision serializers do
224
# not know how how to handle text that is illegal in xml. Note: when
225
# this is fixed, we will need to rev up the revision namespace when
226
# removing the escaping code. -- David Allouche 2007-12-30
227
rev.message = escape_for_xml(rev.message)
228
rev.committer = escape_for_xml(rev.committer)
229
rev.properties['author'] = escape_for_xml(rev.properties['author'])
230
231
return rev
232
233
@classmethod
234
def _parse_tz(klass, tz):
235
"""Parse a timezone specification in the [+|-]HHMM format.
236
237
:return: the timezone offset in seconds.
238
"""
239
assert len(tz) == 5
240
sign = {'+': +1, '-': -1}[tz[0]]
241
hours = int(tz[1:3])
242
minutes = int(tz[3:])
243
return sign * 60 * (60 * hours + minutes)
232
244
233
245
def revision_trees(self, revids):
234
246
for revid in revids:
235
247
yield self.revision_tree(revid)
236
248
237
249
def revision_tree(self, revision_id):
238
revision_id = revision.ensure_null(revision_id)
239
if revision_id == revision.NULL_REVISION:
240
inv = inventory.Inventory(root_id=None)
241
inv.revision_id = revision_id
242
return revisiontree.RevisionTree(self, inv, revision_id)
243
250
return GitRevisionTree(self, revision_id)
244
251
252
def _fetch_blob(self, git_id):
253
lines = self._git.cat_file('blob', git_id)
254
# print "fetched blob:", git_id
255
if self._building_inventory is not None:
256
self._building_inventory.git_file_data[git_id] = lines
257
return lines
258
259
def _get_blob(self, git_id):
260
try:
261
return self._blob_cache[git_id]
262
except KeyError:
263
return self._fetch_blob(git_id)
264
265
def _get_blob_caching(self, git_id):
266
try:
267
return self._blob_cache[git_id]
268
except KeyError:
269
lines = self._fetch_blob(git_id)
270
self._blob_cache[git_id] = lines
271
return lines
272
273
def _get_blob_info(self, git_id):
274
try:
275
return self._blob_info_cache[git_id]
276
except KeyError:
277
lines = self._get_blob(git_id)
278
size = sum(len(line) for line in lines)
279
sha1 = osutils.sha_strings(lines)
280
self._blob_info_cache[git_id] = (size, sha1)
281
return size, sha1
282
245
283
def get_inventory(self, revision_id):
246
assert revision_id != None
247
return self.revision_tree(revision_id).inventory
248
249
def set_make_working_trees(self, trees):
250
pass
251
252
def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref,
253
progress=None):
254
return self._git.fetch_objects(determine_wants, graph_walker, progress)
255
256
def _get_versioned_file_checker(self, text_key_references=None,
257
ancestors=None):
258
return GitVersionedFileChecker(self,
259
text_key_references=text_key_references, ancestors=ancestors)
260
261
262
class GitVersionedFileChecker(repository._VersionedFileChecker):
263
264
file_ids = []
265
266
def _check_file_version_parents(self, texts, progress_bar):
267
return {}, []
268
269
270
class GitRepositoryFormat(repository.RepositoryFormat):
271
"""Git repository format."""
284
if revision_id is None:
285
revision_id = revision.NULL_REVISION
286
if revision_id == revision.NULL_REVISION:
287
return inventory.Inventory(
288
revision_id=revision_id, root_id=None)
289
290
# First pass at building the inventory. We need this one to get the
291
# git ids, so we do not have to cache the entire tree text. Ideally,
292
# this should be all we need to do.
293
git_commit = ids.convert_revision_id_bzr_to_git(revision_id)
294
git_inventory = self._git.get_inventory(git_commit)
295
# print "fetched inventory:", git_commit
296
inv = self._parse_inventory(revision_id, git_inventory)
297
298
# Second pass at building the inventory. There we retrieve additional
299
# data that bzrlib requires: text sizes, sha1s, symlink targets and
300
# revisions that introduced inventory entries
301
self._building_inventory = inv
302
self._building_inventory.git_file_data = {}
303
for file_id in sorted(inv.git_ids.iterkeys()):
304
git_id = inv.git_ids[file_id]
305
entry = inv[file_id]
306
self._set_entry_text_info(inv, entry, git_id)
307
for file_id in sorted(inv.git_ids.iterkeys()):
308
git_id = inv.git_ids[file_id]
309
entry = inv[file_id]
310
path = inv.id2path(file_id)
311
self._set_entry_revision(entry, revision_id, path, git_id)
312
313
# At this point the entry_revision table is fully populated for this
314
# revision. So record that we have inventory data for this revision.
315
self.cachedb.execute(
316
"insert or ignore into inventory (revid) values (?)",
317
(revision_id,))
318
self.cachedb.commit()
319
self._building_inventory = None
320
return inv
321
322
@classmethod
323
def _parse_inventory(klass, revid, git_inv):
324
# For now, git inventory do not have root ids. It is not clear that we
325
# can reliably support root ids. -- David Allouche 2007-12-28
326
inv = inventory.Inventory(revision_id=revid)
327
inv.git_ids = {}
328
for perms, git_kind, git_id, path in git_inv:
329
text_sha1 = None
330
executable = False
331
if git_kind == 'blob':
332
if perms[1] == '0':
333
kind = 'file'
334
executable = bool(int(perms[-3:], 8) & 0111)
335
elif perms[1] == '2':
336
kind = 'symlink'
337
else:
338
raise AssertionError(
339
"Unknown blob kind, perms=%r." % (perms,))
340
elif git_kind == 'tree':
341
kind = 'directory'
342
else:
343
raise AssertionError(
344
"Unknown git entry kind: %r" % (git_kind,))
345
# XXX: Maybe the file id should be prefixed by file kind, so when
346
# the kind of path changes, the id changes too.
347
# -- David Allouche 2007-12-28.
348
file_id = escape_file_id(path.encode('utf-8'))
349
entry = inv.add_path(path, kind, file_id=file_id)
350
entry.executable = executable
351
inv.git_ids[file_id] = git_id
352
inv.root.revision = revid
353
return inv
354
355
def _set_entry_text_info(self, inv, entry, git_id):
356
if entry.kind == 'directory':
357
return
358
size, sha1 = self._get_blob_info(git_id)
359
entry.text_size = size
360
entry.text_sha1 = sha1
361
if entry.kind == 'symlink':
362
lines = self._get_blob_caching(git_id)
363
entry.symlink_target = ''.join(lines)
364
365
def _get_file_revision(self, revision_id, path):
366
lines = self._git.rev_list(
367
[ids.convert_revision_id_bzr_to_git(revision_id)],
368
max_count=1, topo_order=True, paths=[path])
369
[line] = lines
370
result = ids.convert_revision_id_git_to_bzr(line[:-1])
371
# print "fetched file revision", line[:-1], path
372
return result
373
374
def _get_entry_revision_from_db(self, revid, path, git_id, executable):
375
result = self.cachedb.execute(
376
"select revision from entry_revision where"
377
" inventory=? and path=? and gitid=? and executable=?",
378
(revid, path, git_id, executable)).fetchone()
379
if result is None:
380
return None
381
[revision] = result
382
return revision
383
384
def _set_entry_revision_in_db(self, revid, path, git_id, executable, revision):
385
self.cachedb.execute(
386
"insert into entry_revision"
387
" (inventory, path, gitid, executable, revision)"
388
" values (?, ?, ?, ?, ?)",
389
(revid, path, git_id, executable, revision))
390
391
def _all_inventories_in_db(self, revids):
392
for revid in revids:
393
result = self.cachedb.execute(
394
"select count(*) from inventory where revid = ?",
395
(revid,)).fetchone()
396
if result is None:
397
return False
398
return True
399
400
def _set_entry_revision(self, entry, revid, path, git_id):
401
# If a revision is in the cache, we assume it contains entries for the
402
# whole inventory. So if all parent revisions are in the cache, but no
403
# parent entry is present, then the entry revision is the current
404
# revision. That amortizes the number of _get_file_revision calls for
405
# large pulls to a "small number".
406
entry_rev = self._get_entry_revision_from_db(
407
revid, path, git_id, entry.executable)
408
if entry_rev is not None:
409
entry.revision = entry_rev
410
return
411
412
revision = self.get_revision(revid)
413
for parent_id in revision.parent_ids:
414
entry_rev = self._get_entry_revision_from_db(
415
parent_id, path, git_id, entry.executable)
416
if entry_rev is not None:
417
break
418
else:
419
if self._all_inventories_in_db(revision.parent_ids):
420
entry_rev = revid
421
else:
422
entry_rev = self._get_file_revision(revid, path)
423
self._set_entry_revision_in_db(
424
revid, path, git_id, entry.executable, entry_rev)
425
#self.cachedb.commit()
426
entry.revision = entry_rev
427
428
429
def escape_file_id(file_id):
430
return file_id.replace('_', '__').replace(' ', '_s')
431
432
433
def escape_for_xml(message):
434
"""Replace xml-incompatible control characters."""
435
# Copied from _escape_commit_message from bzr-svn.
436
# -- David Allouche 2007-12-29.
437
if message is None:
438
return None
439
import re
440
# FIXME: RBC 20060419 this should be done by the revision
441
# serialiser not by commit. Then we can also add an unescaper
442
# in the deserializer and start roundtripping revision messages
443
# precisely. See repository_implementations/test_repository.py
444
445
# Python strings can include characters that can't be
446
# represented in well-formed XML; escape characters that
447
# aren't listed in the XML specification
448
# (http://www.w3.org/TR/REC-xml/#NT-Char).
449
message, _ = re.subn(
450
u'[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]+',
451
lambda match: match.group(0).encode('unicode_escape'),
452
message)
453
return message
454
455
456
class GitRevisionTree(revisiontree.RevisionTree):
457
458
def __init__(self, repository, revision_id):
459
if revision_id is None:
460
revision_id = revision.NULL_REVISION
461
self._inventory = repository.get_inventory(revision_id)
462
self._repository = repository
463
self._revision_id = revision_id
464
465
def get_file_lines(self, file_id):
466
entry = self._inventory[file_id]
467
if entry.kind == 'directory': return []
468
git_id = self._inventory.git_ids[file_id]
469
if git_id in self._inventory.git_file_data:
470
return self._inventory.git_file_data[git_id]
471
return self._repository._get_blob(git_id)
472
473
474
class GitFormat(object):
272
475
273
476
supports_tree_reference = False
274
rich_root_data = True
275
276
def get_format_description(self):
277
return "Git Repository"
278
279
def initialize(self, url, shared=False, _internal=False):
280
raise errors.UninitializableFormat(self)
281
282
def check_conversion_target(self, target_repo_format):
283
return target_repo_format.rich_root_data
284
285
def get_foreign_tests_repository_factory(self):
286
from bzrlib.plugins.git.tests.test_repository import (
287
ForeignTestsRepositoryFactory,
288
)
289
return ForeignTestsRepositoryFactory()
290
291
def network_name(self):
292
return "git"
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0