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annotate mercurial/streamclone.py @ 6901:43a817f3a649

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streamclone: fold in localrepo.storefiles
author Matt Mackall <mpm@selenic.com>
date Wed, 13 Aug 2008 20:18:44 -0500
parents 80e51429cb9a
children 87abfefafe02
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Vadim Gelfer <vadim.gelfer@gmail.com>
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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
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10 # if server supports streaming clone, it advertises "stream"
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11 # capability with value that is version+flags of repo it is serving.
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12 # client only streams if it can read that repo format.
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13
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14 # stream file format is simple.
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15 #
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16 # server writes out line that says how many files, how many total
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17 # bytes. separator is ascii space, byte counts are strings.
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18 #
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19 # then for each file:
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20 #
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21 # server writes out line that says file name, how many bytes in
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22 # file. separator is ascii nul, byte count is string.
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23 #
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24 # server writes out raw file data.
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25
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26 def stream_out(repo, fileobj, untrusted=False):
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27 '''stream out all metadata files in repository.
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28 writes to file-like object, must support write() and optional flush().'''
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29
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30 if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted):
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31 fileobj.write('1\n')
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32 return
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33
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34 entries = []
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35 total_bytes = 0
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36 try:
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37 l = None
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38 try:
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39 repo.ui.debug('scanning\n')
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40 # get consistent snapshot of repo, lock during scan
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41 l = repo.lock()
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42 for name, ename, size in repo.store.walk():
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43 entries.append((name, size))
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44 total_bytes += size
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45 finally:
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46 del l
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47 except (lock.LockHeld, lock.LockUnavailable), inst:
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48 repo.ui.warn('locking the repository failed: %s\n' % (inst,))
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49 fileobj.write('2\n')
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50 return
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51
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52 fileobj.write('0\n')
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53 repo.ui.debug('%d files, %d bytes to transfer\n' %
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54 (len(entries), total_bytes))
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55 fileobj.write('%d %d\n' % (len(entries), total_bytes))
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56 for name, size in entries:
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57 repo.ui.debug('sending %s (%d bytes)\n' % (name, size))
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58 fileobj.write('%s\0%d\n' % (name, size))
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59 for chunk in util.filechunkiter(repo.sopener(name), limit=size):
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60 fileobj.write(chunk)
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61 flush = getattr(fileobj, 'flush', None)
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62 if flush: flush()