Mercurial > hg
annotate mercurial/streamclone.py @ 10377:04e1e6743809
streamclone: allow uncompressed clones by default
author | Matt Mackall <mpm@selenic.com> |
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date | Sun, 07 Feb 2010 15:31:53 +0100 |
parents | 25e572394f5c |
children | 1a8df80dfdde |
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add support for streaming clone.
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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 of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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9 from i18n import _ |
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10 |
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11 from mercurial import store |
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12 |
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13 class StreamException(Exception): |
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14 def __init__(self, code): |
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15 Exception.__init__(self) |
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16 self.code = code |
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17 def __str__(self): |
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18 return '%i\n' % self.code |
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19 |
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20 # if server supports streaming clone, it advertises "stream" |
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21 # capability with value that is version+flags of repo it is serving. |
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22 # client only streams if it can read that repo format. |
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23 |
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24 # stream file format is simple. |
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25 # |
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26 # server writes out line that says how many files, how many total |
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27 # bytes. separator is ascii space, byte counts are strings. |
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28 # |
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29 # then for each file: |
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30 # |
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31 # server writes out line that says filename, how many bytes in |
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32 # file. separator is ascii nul, byte count is string. |
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33 # |
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34 # server writes out raw file data. |
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35 |
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36 def allowed(ui): |
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37 return ui.configbool('server', 'uncompressed', untrusted=True) |
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38 |
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39 def stream_out(repo): |
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40 '''stream out all metadata files in repository. |
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41 writes to file-like object, must support write() and optional flush().''' |
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42 |
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43 if not allowed(repo.ui): |
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44 raise StreamException(1) |
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45 |
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46 entries = [] |
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47 total_bytes = 0 |
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48 try: |
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49 # get consistent snapshot of repo, lock during scan |
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50 lock = repo.lock() |
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51 try: |
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52 repo.ui.debug('scanning\n') |
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53 for name, ename, size in repo.store.walk(): |
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54 entries.append((name, size)) |
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55 total_bytes += size |
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56 finally: |
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57 lock.release() |
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59 raise StreamException(2) |
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60 |
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61 yield '0\n' |
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62 repo.ui.debug('%d files, %d bytes to transfer\n' % |
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63 (len(entries), total_bytes)) |
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64 yield '%d %d\n' % (len(entries), total_bytes) |
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65 for name, size in entries: |
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66 repo.ui.debug('sending %s (%d bytes)\n' % (name, size)) |
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67 # partially encode name over the wire for backwards compat |
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68 yield '%s\0%d\n' % (store.encodedir(name), size) |
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69 for chunk in util.filechunkiter(repo.sopener(name), limit=size): |
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70 yield chunk |