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  • Committer: Robert Collins
  • Date: 2010-05-06 11:08:10 UTC
  • mto: This revision was merged to the branch mainline in revision 5223.
  • Revision ID: robertc@robertcollins.net-20100506110810-h3j07fh5gmw54s25
Cleaner matcher matching revised unlocking protocol.

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breezy/git/send.py
1
 
# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>
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3
 
# Based on the original from bzr-svn:
4
 
# Copyright (C) 2009 Lukas Lalinsky <lalinsky@gmail.com>
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# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
6
 
 
7
 
# This program is free software; you can redistribute it and/or modify
8
 
# it under the terms of the GNU General Public License as published by
9
 
# the Free Software Foundation; either version 2 of the License, or
10
 
# (at your option) any later version.
11
 
#
12
 
# This program is distributed in the hope that it will be useful,
13
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
 
# GNU General Public License for more details.
16
 
#
17
 
# You should have received a copy of the GNU General Public License
18
 
# along with this program; if not, write to the Free Software
19
 
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 
 
21
 
"""Support in "brz send" for git-am style patches."""
22
 
 
23
 
from __future__ import absolute_import
24
 
 
25
 
import time
26
 
from .. import __version__ as brz_version
27
 
from .. import (
28
 
    branch as _mod_branch,
29
 
    diff as _mod_diff,
30
 
    errors,
31
 
    osutils,
32
 
    revision as _mod_revision,
33
 
    )
34
 
 
35
 
from ..merge_directive import BaseMergeDirective
36
 
 
37
 
from .mapping import (
38
 
    object_mode,
39
 
    )
40
 
from .object_store import (
41
 
    get_object_store,
42
 
    )
43
 
 
44
 
from io import BytesIO
45
 
from dulwich import (
46
 
    __version__ as dulwich_version,
47
 
    )
48
 
from dulwich.objects import (
49
 
    Blob,
50
 
    )
51
 
 
52
 
 
53
 
version_tail = "Breezy %s, dulwich %d.%d.%d" % (
54
 
    (brz_version, ) + dulwich_version[:3])
55
 
 
56
 
 
57
 
class GitDiffTree(_mod_diff.DiffTree):
58
 
    """Provides a text representation between two trees, formatted for svn."""
59
 
 
60
 
    def _show_diff(self, specific_files, extra_trees):
61
 
        from dulwich.patch import write_blob_diff
62
 
        iterator = self.new_tree.iter_changes(
63
 
            self.old_tree, specific_files=specific_files,
64
 
            extra_trees=extra_trees, require_versioned=True)
65
 
        has_changes = 0
66
 
 
67
 
        def get_encoded_path(path):
68
 
            if path is not None:
69
 
                return path.encode(self.path_encoding, "replace")
70
 
 
71
 
        def get_file_mode(tree, path, kind, executable):
72
 
            if path is None:
73
 
                return 0
74
 
            return object_mode(kind, executable)
75
 
 
76
 
        def get_blob(present, tree, path):
77
 
            if present:
78
 
                with tree.get_file(path) as f:
79
 
                    return Blob.from_string(f.read())
80
 
            else:
81
 
                return None
82
 
        trees = (self.old_tree, self.new_tree)
83
 
        for (file_id, paths, changed_content, versioned, parent, name, kind,
84
 
             executable) in iterator:
85
 
            # The root does not get diffed, and items with no known kind (that
86
 
            # is, missing) in both trees are skipped as well.
87
 
            if parent == (None, None) or kind == (None, None):
88
 
                continue
89
 
            path_encoded = (get_encoded_path(paths[0]),
90
 
                            get_encoded_path(paths[1]))
91
 
            present = ((kind[0] not in (None, 'directory')),
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                       (kind[1] not in (None, 'directory')))
93
 
            if not present[0] and not present[1]:
94
 
                continue
95
 
            contents = (get_blob(present[0], trees[0], paths[0]),
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                        get_blob(present[1], trees[1], paths[1]))
97
 
            renamed = (parent[0], name[0]) != (parent[1], name[1])
98
 
            mode = (get_file_mode(trees[0], path_encoded[0],
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                                  kind[0], executable[0]),
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                    get_file_mode(trees[1], path_encoded[1],
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                                  kind[1], executable[1]))
102
 
            write_blob_diff(self.to_file,
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                            (path_encoded[0], mode[0], contents[0]),
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                            (path_encoded[1], mode[1], contents[1]))
105
 
            has_changes |= (changed_content or renamed)
106
 
        return has_changes
107
 
 
108
 
 
109
 
def generate_patch_filename(num, summary):
110
 
    return "%04d-%s.patch" % (num, summary.replace("/", "_").rstrip("."))
111
 
 
112
 
 
113
 
class GitMergeDirective(BaseMergeDirective):
114
 
 
115
 
    multiple_output_files = True
116
 
 
117
 
    def __init__(self, revision_id, testament_sha1, time, timezone,
118
 
                 target_branch, source_branch=None, message=None,
119
 
                 patches=None, local_target_branch=None):
120
 
        super(GitMergeDirective, self).__init__(
121
 
            revision_id=revision_id, testament_sha1=testament_sha1, time=time,
122
 
            timezone=timezone, target_branch=target_branch, patch=None,
123
 
            source_branch=source_branch, message=message, bundle=None)
124
 
        self.patches = patches
125
 
 
126
 
    def to_lines(self):
127
 
        return self.patch.splitlines(True)
128
 
 
129
 
    def to_files(self):
130
 
        return self.patches
131
 
 
132
 
    @classmethod
133
 
    def _generate_commit(cls, repository, revision_id, num, total):
134
 
        s = BytesIO()
135
 
        store = get_object_store(repository)
136
 
        with store.lock_read():
137
 
            commit = store[store._lookup_revision_sha1(revision_id)]
138
 
        from dulwich.patch import write_commit_patch, get_summary
139
 
        try:
140
 
            lhs_parent = repository.get_revision(revision_id).parent_ids[0]
141
 
        except IndexError:
142
 
            lhs_parent = _mod_revision.NULL_REVISION
143
 
        tree_1 = repository.revision_tree(lhs_parent)
144
 
        tree_2 = repository.revision_tree(revision_id)
145
 
        contents = BytesIO()
146
 
        differ = GitDiffTree.from_trees_options(
147
 
            tree_1, tree_2, contents, 'utf8', None, 'a/', 'b/', None)
148
 
        differ.show_diff(None, None)
149
 
        write_commit_patch(s, commit, contents.getvalue(), (num, total),
150
 
                           version_tail)
151
 
        summary = generate_patch_filename(num, get_summary(commit))
152
 
        return summary, s.getvalue()
153
 
 
154
 
    @classmethod
155
 
    def from_objects(cls, repository, revision_id, time, timezone,
156
 
                     target_branch, local_target_branch=None,
157
 
                     public_branch=None, message=None):
158
 
        patches = []
159
 
        submit_branch = _mod_branch.Branch.open(target_branch)
160
 
        with submit_branch.lock_read():
161
 
            submit_revision_id = submit_branch.last_revision()
162
 
            repository.fetch(submit_branch.repository, submit_revision_id)
163
 
            graph = repository.get_graph()
164
 
            todo = graph.find_difference(submit_revision_id, revision_id)[1]
165
 
            total = len(todo)
166
 
            for i, revid in enumerate(graph.iter_topo_order(todo)):
167
 
                patches.append(cls._generate_commit(repository, revid, i + 1,
168
 
                                                    total))
169
 
        return cls(revision_id, None, time, timezone,
170
 
                   target_branch=target_branch, source_branch=public_branch,
171
 
                   message=message, patches=patches)
172
 
 
173
 
 
174
 
def send_git(branch, revision_id, submit_branch, public_branch, no_patch,
175
 
             no_bundle, message, base_revision_id, local_target_branch=None):
176
 
    if no_patch:
177
 
        raise errors.BzrCommandError(
178
 
            "no patch not supported for git-am style patches")
179
 
    if no_bundle:
180
 
        raise errors.BzrCommandError(
181
 
            "no bundle not supported for git-am style patches")
182
 
    return GitMergeDirective.from_objects(
183
 
        branch.repository, revision_id, time.time(),
184
 
        osutils.local_time_offset(), submit_branch,
185
 
        public_branch=public_branch, message=message,
186
 
        local_target_branch=local_target_branch)