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Viewing changes to breezy/git/send.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/send.py
 
1
# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>
 
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# Based on the original from bzr-svn:
 
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# Copyright (C) 2009 Lukas Lalinsky <lalinsky@gmail.com>
 
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# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
 
6
 
 
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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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"""Support in "bzr send" for git-am style patches."""
 
22
 
 
23
from __future__ import absolute_import
 
24
 
 
25
import time
 
26
from .. import __version__ as bzr_version
 
27
from .. import (
 
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    branch as _mod_branch,
 
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    diff as _mod_diff,
 
30
    errors,
 
31
    osutils,
 
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    revision as _mod_revision,
 
33
    )
 
34
 
 
35
from ..merge_directive import BaseMergeDirective
 
36
 
 
37
from . import (
 
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    version_info as bzr_git_version_info,
 
39
    )
 
40
from .mapping import (
 
41
    object_mode,
 
42
    )
 
43
from .object_store import (
 
44
    get_object_store,
 
45
    )
 
46
 
 
47
from io import BytesIO
 
48
from dulwich import (
 
49
    __version__ as dulwich_version,
 
50
    )
 
51
from dulwich.objects import (
 
52
    Blob,
 
53
    )
 
54
 
 
55
 
 
56
version_tail = "bzr %s, bzr-git %d.%d.%d, dulwich %d.%d.%d" % (
 
57
    (bzr_version, ) + bzr_git_version_info[:3] + dulwich_version[:3])
 
58
 
 
59
 
 
60
class GitDiffTree(_mod_diff.DiffTree):
 
61
    """Provides a text representation between two trees, formatted for svn."""
 
62
 
 
63
    def _show_diff(self, specific_files, extra_trees):
 
64
        from dulwich.patch import write_blob_diff
 
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        iterator = self.new_tree.iter_changes(self.old_tree,
 
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                                              specific_files=specific_files, extra_trees=extra_trees,
 
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                                              require_versioned=True)
 
68
        has_changes = 0
 
69
 
 
70
        def get_encoded_path(path):
 
71
            if path is not None:
 
72
                return path.encode(self.path_encoding, "replace")
 
73
 
 
74
        def get_file_mode(tree, path, kind, executable):
 
75
            if path is None:
 
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                return 0
 
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            return object_mode(kind, executable)
 
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        def get_blob(present, tree, path):
 
80
            if present:
 
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                with tree.get_file(path) as f:
 
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                    return Blob.from_string(f.read())
 
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            else:
 
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                return None
 
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        trees = (self.old_tree, self.new_tree)
 
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        for (file_id, paths, changed_content, versioned, parent, name, kind,
 
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             executable) in iterator:
 
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            # The root does not get diffed, and items with no known kind (that
 
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            # is, missing) in both trees are skipped as well.
 
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            if parent == (None, None) or kind == (None, None):
 
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                continue
 
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            path_encoded = (get_encoded_path(paths[0]),
 
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                            get_encoded_path(paths[1]))
 
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            present = ((kind[0] not in (None, 'directory')),
 
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                       (kind[1] not in (None, 'directory')))
 
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            if not present[0] and not present[1]:
 
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                continue
 
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            contents = (get_blob(present[0], trees[0], paths[0]),
 
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                        get_blob(present[1], trees[1], paths[1]))
 
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            renamed = (parent[0], name[0]) != (parent[1], name[1])
 
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            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]))
 
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            write_blob_diff(self.to_file,
 
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                            (path_encoded[0], mode[0], contents[0]),
 
107
                            (path_encoded[1], mode[1], contents[1]))
 
108
            has_changes |= (changed_content or renamed)
 
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        return has_changes
 
110
 
 
111
 
 
112
def generate_patch_filename(num, summary):
 
113
    return "%04d-%s.patch" % (num, summary.replace("/", "_").rstrip("."))
 
114
 
 
115
 
 
116
class GitMergeDirective(BaseMergeDirective):
 
117
 
 
118
    multiple_output_files = True
 
119
 
 
120
    def __init__(self, revision_id, testament_sha1, time, timezone,
 
121
                 target_branch, source_branch=None, message=None,
 
122
                 patches=None, local_target_branch=None):
 
123
        super(GitMergeDirective, self).__init__(revision_id=revision_id,
 
124
                                                testament_sha1=testament_sha1, time=time, timezone=timezone,
 
125
                                                target_branch=target_branch, patch=None,
 
126
                                                source_branch=source_branch, message=message,
 
127
                                                bundle=None)
 
128
        self.patches = patches
 
129
 
 
130
    def to_lines(self):
 
131
        return self.patch.splitlines(True)
 
132
 
 
133
    def to_files(self):
 
134
        return self.patches
 
135
 
 
136
    @classmethod
 
137
    def _generate_commit(cls, repository, revision_id, num, total):
 
138
        s = BytesIO()
 
139
        store = get_object_store(repository)
 
140
        with store.lock_read():
 
141
            commit = store[store._lookup_revision_sha1(revision_id)]
 
142
        from dulwich.patch import write_commit_patch, get_summary
 
143
        try:
 
144
            lhs_parent = repository.get_revision(revision_id).parent_ids[0]
 
145
        except IndexError:
 
146
            lhs_parent = _mod_revision.NULL_REVISION
 
147
        tree_1 = repository.revision_tree(lhs_parent)
 
148
        tree_2 = repository.revision_tree(revision_id)
 
149
        contents = BytesIO()
 
150
        differ = GitDiffTree.from_trees_options(tree_1, tree_2,
 
151
                                                contents, 'utf8', None, 'a/', 'b/', None)
 
152
        differ.show_diff(None, None)
 
153
        write_commit_patch(s, commit, contents.getvalue(), (num, total),
 
154
                           version_tail)
 
155
        summary = generate_patch_filename(num, get_summary(commit))
 
156
        return summary, s.getvalue()
 
157
 
 
158
    @classmethod
 
159
    def from_objects(cls, repository, revision_id, time, timezone,
 
160
                     target_branch, local_target_branch=None,
 
161
                     public_branch=None, message=None):
 
162
        patches = []
 
163
        submit_branch = _mod_branch.Branch.open(target_branch)
 
164
        with submit_branch.lock_read():
 
165
            submit_revision_id = submit_branch.last_revision()
 
166
            repository.fetch(submit_branch.repository, submit_revision_id)
 
167
            graph = repository.get_graph()
 
168
            todo = graph.find_difference(submit_revision_id, revision_id)[1]
 
169
            total = len(todo)
 
170
            for i, revid in enumerate(graph.iter_topo_order(todo)):
 
171
                patches.append(cls._generate_commit(repository, revid, i + 1,
 
172
                                                    total))
 
173
        return cls(revision_id, None, time, timezone,
 
174
                   target_branch=target_branch, source_branch=public_branch,
 
175
                   message=message, patches=patches)
 
176
 
 
177
 
 
178
def send_git(branch, revision_id, submit_branch, public_branch, no_patch, no_bundle, message, base_revision_id, local_target_branch=None):
 
179
    if no_patch:
 
180
        raise errors.BzrCommandError(
 
181
            "no patch not supported for git-am style patches")
 
182
    if no_bundle:
 
183
        raise errors.BzrCommandError(
 
184
            "no bundle not supported for git-am style patches")
 
185
    return GitMergeDirective.from_objects(
 
186
        branch.repository, revision_id, time.time(),
 
187
        osutils.local_time_offset(), submit_branch,
 
188
        public_branch=public_branch, message=message,
 
189
        local_target_branch=local_target_branch)