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  • Committer: Martin Pool
  • Date: 2005-08-04 22:04:40 UTC
  • Revision ID: mbp@sourcefrog.net-20050804220440-99562df8151d1ac5
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server.py
1
 
# Copyright (C) 2008 Jelmer Vernooij
2
 
# Copyright (C) 2008 John Carr
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# Copyright (C) 2008 Canonical Ltd
4
 
#
5
 
# This program is free software; you can redistribute it and/or modify
6
 
# it under the terms of the GNU General Public License as published by
7
 
# the Free Software Foundation; either version 2 of the License, or
8
 
# (at your option) any later version.
9
 
#
10
 
# This program is distributed in the hope that it will be useful,
11
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
 
# GNU General Public License for more details.
14
 
#
15
 
# You should have received a copy of the GNU General Public License
16
 
# along with this program; if not, write to the Free Software
17
 
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18
 
 
19
 
import os
20
 
import tempfile
21
 
 
22
 
from dulwich.server import TCPGitServer
23
 
 
24
 
from bzrlib.bzrdir import (
25
 
    BzrDir,
26
 
    BzrDirFormat,
27
 
    )
28
 
from bzrlib.repository import (
29
 
    Repository,
30
 
    )
31
 
 
32
 
from bzrlib.plugins.git.fetch import (
33
 
    import_git_objects,
34
 
    BazaarObjectStore,
35
 
    )
36
 
from bzrlib.plugins.git.mapping import (
37
 
    default_mapping,
38
 
    )
39
 
from bzrlib.plugins.git.object_store import (
40
 
    get_object_store
41
 
    )
42
 
 
43
 
from dulwich.server import (
44
 
    Backend,
45
 
    )
46
 
from dulwich.pack import (
47
 
    Pack,
48
 
    PackData,
49
 
    write_pack_index_v2,
50
 
    )
51
 
from dulwich.objects import (
52
 
    ShaFile,
53
 
    sha_to_hex,
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    hex_to_sha,
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    )
56
 
 
57
 
class BzrBackend(Backend):
58
 
 
59
 
    def __init__(self, transport):
60
 
        self.transport = transport
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        self.mapping = default_mapping
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63
 
    def get_refs(self):
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        """ return a dict of all tags and branches in repository (and shas) """
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        ret = {}
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        repo_dir = BzrDir.open_from_transport(self.transport)
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        repo = repo_dir.find_repository()
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        repo.lock_read()
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        try:
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            store = get_object_store(repo)
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            branch = None
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            for branch in repo.find_branches(using=True):
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                #FIXME: Look for 'master' or 'trunk' in here, and set HEAD accordingly...
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                #FIXME: Need to get branch path relative to its repository and use this instead of nick
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                ret["refs/heads/"+branch.nick] = store._lookup_revision_sha1(branch.last_revision())
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            if 'HEAD' not in ret and branch:
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                ret['HEAD'] = store._lookup_revision_sha1(branch.last_revision())
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        finally:
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            repo.unlock()
80
 
        return ret
81
 
 
82
 
    def apply_pack(self, refs, read):
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        """apply pack from client to current repository"""
84
 
 
85
 
        fd, path = tempfile.mkstemp(suffix=".pack")
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        f = os.fdopen(fd, 'w')
87
 
        f.write(read())
88
 
        f.close()
89
 
 
90
 
        p = PackData(path)
91
 
        entries = p.sorted_entries()
92
 
        heads = []
93
 
        for e in entries:
94
 
            sha = e[0]
95
 
            offset = e[1]
96
 
            t, o = p.get_object_at (offset)
97
 
            if t == 1 or t == 4:
98
 
                heads.append(sha)
99
 
        write_pack_index_v2(path[:-5]+".idx", entries, p.calculate_checksum())
100
 
 
101
 
        repo_dir = BzrDir.open_from_transport(self.transport)
102
 
        target = repo_dir.find_repository()
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104
 
        objects = {}
105
 
        for tup in p.iterobjects():
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            obj_type, obj = p.get_object_at (tup[0])
107
 
            if obj_type in range(1, 4):
108
 
                sf = ShaFile.from_raw_string (obj_type, obj)
109
 
                objects[hex_to_sha(sf.id)] = sf
110
 
 
111
 
        target.lock_write()
112
 
        try:
113
 
            target.start_write_group()
114
 
            try:
115
 
                import_git_objects(target, self.mapping, objects,
116
 
                                   BazaarObjectStore (target, self.mapping),
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                                   heads)
118
 
            except:
119
 
                target.abort_write_group()
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                raise
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            else:
122
 
                target.commit_write_group()
123
 
        finally:
124
 
            target.unlock()
125
 
 
126
 
        for oldsha, sha, ref in refs:
127
 
            if ref[:11] == 'refs/heads/':
128
 
                branch_nick = ref[11:]
129
 
                transport = self.transport.clone(branch_nick)
130
 
 
131
 
                try:
132
 
                    target_dir = BzrDir.open_from_transport(transport)
133
 
                except:
134
 
                    format = BzrDirFormat.get_default_format()
135
 
                    format.initialize_on_transport(transport)
136
 
 
137
 
                try:
138
 
                    target_branch = target_dir.open_branch()
139
 
                except:
140
 
                    target_branch = target_dir.create_branch()
141
 
 
142
 
                rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
143
 
                target_branch.generate_revision_history(rev_id)
144
 
 
145
 
    def fetch_objects(self, determine_wants, graph_walker, progress):
146
 
        """ yield git objects to send to client """
147
 
        bzrdir = BzrDir.open_from_transport(self.transport)
148
 
        repo = bzrdir.find_repository()
149
 
 
150
 
        # If this is a Git repository, just use the existing fetch_objects implementation.
151
 
        if getattr(repo, "fetch_objects", None) is not None:
152
 
            return repo.fetch_objects(determine_wants, graph_walker, None, progress)[0]
153
 
 
154
 
        wants = determine_wants(self.get_refs())
155
 
        graph_walker.reset()
156
 
        repo.lock_read()
157
 
        store = BazaarObjectStore(repo)
158
 
        have = store.find_common_revisions(graph_walker)
159
 
        missing_sha1s = store.find_missing_objects(have, wants, progress)
160
 
        return store.iter_shas(missing_sha1s)
161
 
 
162
 
 
163
 
def serve_git(transport, host=None, port=None, inet=False):
164
 
    backend = BzrBackend(transport)
165
 
 
166
 
    if host is None:
167
 
        host = 'localhost'
168
 
    if port:
169
 
        server = TCPGitServer(backend, host, port)
170
 
    else:
171
 
        server = TCPGitServer(backend, host)
172
 
    server.serve_forever()