annotate mercurial/streamclone.py @ 7383:b501c7f3c2ad

graphlog: fix regression with filelogs introduced by 7bc62ebe7693
author Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
date Sun, 16 Nov 2008 20:55:30 +0100
parents 810ca383da9c
children 7197812e8d44
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1 # streamclone.py - streaming clone server support for mercurial
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2 #
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 import util, lock
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9 from i18n import _
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10
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11 class StreamException(Exception):
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12 def __init__(self, code):
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13 Exception.__init__(self)
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14 self.code = code
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15 def __str__(self):
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16 return '%i\n' % self.code
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17
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18 # if server supports streaming clone, it advertises "stream"
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19 # capability with value that is version+flags of repo it is serving.
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20 # client only streams if it can read that repo format.
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21
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22 # stream file format is simple.
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23 #
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24 # server writes out line that says how many files, how many total
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25 # bytes. separator is ascii space, byte counts are strings.
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26 #
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27 # then for each file:
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28 #
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29 # server writes out line that says file name, how many bytes in
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30 # file. separator is ascii nul, byte count is string.
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31 #
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32 # server writes out raw file data.
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33
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34 def stream_out(repo, untrusted=False):
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35 '''stream out all metadata files in repository.
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36 writes to file-like object, must support write() and optional flush().'''
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37
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38 if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted):
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39 raise StreamException(1)
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40
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41 entries = []
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42 total_bytes = 0
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43 try:
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44 l = None
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45 try:
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46 repo.ui.debug(_('scanning\n'))
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47 # get consistent snapshot of repo, lock during scan
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48 l = repo.lock()
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49 for name, ename, size in repo.store.walk():
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50 entries.append((name, size))
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51 total_bytes += size
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52 finally:
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53 del l
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54 except (lock.LockHeld, lock.LockUnavailable):
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55 raise StreamException(2)
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56
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57 yield '0\n'
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58 repo.ui.debug(_('%d files, %d bytes to transfer\n') %
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59 (len(entries), total_bytes))
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60 yield '%d %d\n' % (len(entries), total_bytes)
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61 for name, size in entries:
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62 repo.ui.debug(_('sending %s (%d bytes)\n') % (name, size))
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63 yield '%s\0%d\n' % (name, size)
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64 for chunk in util.filechunkiter(repo.sopener(name), limit=size):
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65 yield chunk