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  • Committer: Jelmer Vernooij
  • Date: 2020-04-05 19:11:34 UTC
  • mto: (7490.7.16 work)
  • mto: This revision was merged to the branch mainline in revision 7501.
  • Revision ID: jelmer@jelmer.uk-20200405191134-0aebh8ikiwygxma5
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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 "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 (
 
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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 .mapping import (
 
38
    object_mode,
 
39
    )
 
40
from .object_store import (
 
41
    get_object_store,
 
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    )
 
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:
 
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                return 0
 
74
            return object_mode(kind, executable)
 
75
 
 
76
        def get_blob(present, tree, path):
 
77
            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
 
82
        trees = (self.old_tree, self.new_tree)
 
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        for change 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.
 
86
            if change.parent_id == (None, None) or change.kind == (None, None):
 
87
                continue
 
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            path_encoded = (get_encoded_path(change.path[0]),
 
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                            get_encoded_path(change.path[1]))
 
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            present = ((change.kind[0] not in (None, 'directory')),
 
91
                       (change.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], change.path[0]),
 
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                        get_blob(present[1], trees[1], change.path[1]))
 
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            renamed = (change.parent_id[0], change.name[0]) != (change.parent_id[1], change.name[1])
 
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            mode = (get_file_mode(trees[0], path_encoded[0],
 
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                                  change.kind[0], change.executable[0]),
 
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                    get_file_mode(trees[1], path_encoded[1],
 
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                                  change.kind[1], change.executable[1]))
 
101
            write_blob_diff(self.to_file,
 
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                            (path_encoded[0], mode[0], contents[0]),
 
103
                            (path_encoded[1], mode[1], contents[1]))
 
104
            has_changes |= (change.changed_content or renamed)
 
105
        return has_changes
 
106
 
 
107
 
 
108
def generate_patch_filename(num, summary):
 
109
    return "%04d-%s.patch" % (num, summary.replace("/", "_").rstrip("."))
 
110
 
 
111
 
 
112
class GitMergeDirective(BaseMergeDirective):
 
113
 
 
114
    multiple_output_files = True
 
115
 
 
116
    def __init__(self, revision_id, testament_sha1, time, timezone,
 
117
                 target_branch, source_branch=None, message=None,
 
118
                 patches=None, local_target_branch=None):
 
119
        super(GitMergeDirective, self).__init__(
 
120
            revision_id=revision_id, testament_sha1=testament_sha1, time=time,
 
121
            timezone=timezone, target_branch=target_branch, patch=None,
 
122
            source_branch=source_branch, message=message, bundle=None)
 
123
        self.patches = patches
 
124
 
 
125
    def to_lines(self):
 
126
        return self.patch.splitlines(True)
 
127
 
 
128
    def to_files(self):
 
129
        return ((summary, patch.splitlines(True)) for (summary, patch) in self.patches)
 
130
 
 
131
    @classmethod
 
132
    def _generate_commit(cls, repository, revision_id, num, total,
 
133
                         context=_mod_diff.DEFAULT_CONTEXT_AMOUNT):
 
134
        s = BytesIO()
 
135
        store = get_object_store(repository)
 
136
        with store.lock_read():
 
137
            commit = store[repository.lookup_bzr_revision_id(revision_id)[0]]
 
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
            context_lines=context)
 
149
        differ.show_diff(None, None)
 
150
        write_commit_patch(s, commit, contents.getvalue(), (num, total),
 
151
                           version_tail)
 
152
        summary = generate_patch_filename(num, get_summary(commit))
 
153
        return summary, s.getvalue()
 
154
 
 
155
    @classmethod
 
156
    def from_objects(cls, repository, revision_id, time, timezone,
 
157
                     target_branch, local_target_branch=None,
 
158
                     public_branch=None, message=None):
 
159
        patches = []
 
160
        submit_branch = _mod_branch.Branch.open(target_branch)
 
161
        with submit_branch.lock_read():
 
162
            submit_revision_id = submit_branch.last_revision()
 
163
            repository.fetch(submit_branch.repository, submit_revision_id)
 
164
            graph = repository.get_graph()
 
165
            todo = graph.find_difference(submit_revision_id, revision_id)[1]
 
166
            total = len(todo)
 
167
            for i, revid in enumerate(graph.iter_topo_order(todo)):
 
168
                patches.append(cls._generate_commit(repository, revid, i + 1,
 
169
                                                    total))
 
170
        return cls(revision_id, None, time, timezone,
 
171
                   target_branch=target_branch, source_branch=public_branch,
 
172
                   message=message, patches=patches)
 
173
 
 
174
 
 
175
def send_git(branch, revision_id, submit_branch, public_branch, no_patch,
 
176
             no_bundle, message, base_revision_id, local_target_branch=None):
 
177
    if no_patch:
 
178
        raise errors.BzrCommandError(
 
179
            "no patch not supported for git-am style patches")
 
180
    if no_bundle:
 
181
        raise errors.BzrCommandError(
 
182
            "no bundle not supported for git-am style patches")
 
183
    return GitMergeDirective.from_objects(
 
184
        branch.repository, revision_id, time.time(),
 
185
        osutils.local_time_offset(), submit_branch,
 
186
        public_branch=public_branch, message=message,
 
187
        local_target_branch=local_target_branch)