68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
# streamclone.py - streaming clone server support for mercurial
|
|
#
|
|
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
|
|
#
|
|
# This software may be used and distributed according to the terms of the
|
|
# GNU General Public License version 2, incorporated herein by reference.
|
|
|
|
import util, error
|
|
from i18n import _
|
|
|
|
from mercurial import store
|
|
|
|
class StreamException(Exception):
|
|
def __init__(self, code):
|
|
Exception.__init__(self)
|
|
self.code = code
|
|
def __str__(self):
|
|
return '%i\n' % self.code
|
|
|
|
# if server supports streaming clone, it advertises "stream"
|
|
# capability with value that is version+flags of repo it is serving.
|
|
# client only streams if it can read that repo format.
|
|
|
|
# stream file format is simple.
|
|
#
|
|
# server writes out line that says how many files, how many total
|
|
# bytes. separator is ascii space, byte counts are strings.
|
|
#
|
|
# then for each file:
|
|
#
|
|
# server writes out line that says filename, how many bytes in
|
|
# file. separator is ascii nul, byte count is string.
|
|
#
|
|
# server writes out raw file data.
|
|
|
|
def stream_out(repo, untrusted=False):
|
|
'''stream out all metadata files in repository.
|
|
writes to file-like object, must support write() and optional flush().'''
|
|
|
|
if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted):
|
|
raise StreamException(1)
|
|
|
|
entries = []
|
|
total_bytes = 0
|
|
try:
|
|
# get consistent snapshot of repo, lock during scan
|
|
lock = repo.lock()
|
|
try:
|
|
repo.ui.debug(_('scanning\n'))
|
|
for name, ename, size in repo.store.walk():
|
|
# for backwards compat, name was partially encoded
|
|
entries.append((store.encodedir(name), size))
|
|
total_bytes += size
|
|
finally:
|
|
lock.release()
|
|
except error.LockError:
|
|
raise StreamException(2)
|
|
|
|
yield '0\n'
|
|
repo.ui.debug(_('%d files, %d bytes to transfer\n') %
|
|
(len(entries), total_bytes))
|
|
yield '%d %d\n' % (len(entries), total_bytes)
|
|
for name, size in entries:
|
|
repo.ui.debug(_('sending %s (%d bytes)\n') % (name, size))
|
|
yield '%s\0%d\n' % (name, size)
|
|
for chunk in util.filechunkiter(repo.sopener(name), limit=size):
|
|
yield chunk
|