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