mercurial/streamclone.py
author Matt Mackall <mpm@selenic.com>
Wed, 13 Aug 2008 20:18:44 -0500
changeset 6901 43a817f3a649
parent 6840 80e51429cb9a
child 6925 87abfefafe02
permissions -rw-r--r--
streamclone: fold in localrepo.storefiles
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
2612
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     1
# streamclone.py - streaming clone server support for mercurial
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     2
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     3
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     4
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     5
# This software may be used and distributed according to the terms
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     6
# of the GNU General Public License, incorporated herein by reference.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     7
6840
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
     8
import util, lock
2612
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
     9
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    10
# if server supports streaming clone, it advertises "stream"
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    11
# capability with value that is version+flags of repo it is serving.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    12
# client only streams if it can read that repo format.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    13
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    14
# stream file format is simple.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    15
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    16
# server writes out line that says how many files, how many total
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    17
# bytes.  separator is ascii space, byte counts are strings.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    18
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    19
# then for each file:
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    20
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    21
#   server writes out line that says file name, how many bytes in
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    22
#   file.  separator is ascii nul, byte count is string.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    23
#
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    24
#   server writes out raw file data.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    25
6794
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    26
def stream_out(repo, fileobj, untrusted=False):
2612
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    27
    '''stream out all metadata files in repository.
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    28
    writes to file-like object, must support write() and optional flush().'''
2621
5a5852a417b1 clone: disable stream support on server side by default.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2612
diff changeset
    29
4834
439e2f2fde42 Fix inconsistency for the stream_out capability in hgweb
Edouard Gomez <ed.gomez@free.fr>
parents: 4134
diff changeset
    30
    if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted):
6794
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    31
        fileobj.write('1\n')
2621
5a5852a417b1 clone: disable stream support on server side by default.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2612
diff changeset
    32
        return
5a5852a417b1 clone: disable stream support on server side by default.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2612
diff changeset
    33
6901
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    34
    entries = []
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    35
    total_bytes = 0
3687
d5dd0a2a44bc Handle locking exceptions if streaming clone can't lock the repo. (Issue324)
Thomas Arendsen Hein <thomas@intevation.de>
parents: 2623
diff changeset
    36
    try:
6901
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    37
        l = None
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    38
        try:
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    39
            repo.ui.debug('scanning\n')
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    40
            # get consistent snapshot of repo, lock during scan
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    41
            l = repo.lock()
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    42
            for name, ename, size in repo.store.walk():
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    43
                entries.append((name, size))
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    44
                total_bytes += size
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    45
        finally:
43a817f3a649 streamclone: fold in localrepo.storefiles
Matt Mackall <mpm@selenic.com>
parents: 6840
diff changeset
    46
            del l
6840
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
    47
    except (lock.LockHeld, lock.LockUnavailable), inst:
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
    48
        repo.ui.warn('locking the repository failed: %s\n' % (inst,))
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
    49
        fileobj.write('2\n')
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
    50
        return
3687
d5dd0a2a44bc Handle locking exceptions if streaming clone can't lock the repo. (Issue324)
Thomas Arendsen Hein <thomas@intevation.de>
parents: 2623
diff changeset
    51
6840
80e51429cb9a introduce store classes
Adrian Buehlmann <adrian@cadifra.com>
parents: 6794
diff changeset
    52
    fileobj.write('0\n')
2612
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    53
    repo.ui.debug('%d files, %d bytes to transfer\n' %
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    54
                  (len(entries), total_bytes))
6794
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    55
    fileobj.write('%d %d\n' % (len(entries), total_bytes))
2612
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    56
    for name, size in entries:
ffb895f16925 add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
    57
        repo.ui.debug('sending %s (%d bytes)\n' % (name, size))
6794
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    58
        fileobj.write('%s\0%d\n' % (name, size))
3791
8643b9f90b51 introduce localrepo.spath for the store path, sopener fixes
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 3721
diff changeset
    59
        for chunk in util.filechunkiter(repo.sopener(name), limit=size):
6794
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    60
            fileobj.write(chunk)
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    61
    flush = getattr(fileobj, 'flush', None)
8ff321a381d0 Backed out changeset b9d6ab187523 (doesn't work on Python 2.3/2.4)
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6782
diff changeset
    62
    if flush: flush()