Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/streamclone.py @ 5483:0c43f87baba3 default tip

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Fix file-changed-to-dir and dir-to-file commits (issue660). Allow adding to dirstate files that clash with previously existing but marked for removal. Protect from reintroducing clashes by revert. This change doesn't address related issues with update. Current workaround is to do "clean" update by manually removing conflicting files/dirs from working directory.
author Maxim Dounin <mdounin@mdounin.ru>
date Sat, 27 Oct 2007 16:27:55 +0400
parents a58d415b272e
children
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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 from i18n import _
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9 import os, osutil, stat, util, lock
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10
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11 # if server supports streaming clone, it advertises "stream"
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12 # capability with value that is version+flags of repo it is serving.
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13 # client only streams if it can read that repo format.
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14
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15 def walkrepo(root):
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16 '''iterate over metadata files in repository.
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17 walk in natural (sorted) order.
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18 yields 2-tuples: name of .d or .i file, size of file.'''
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19
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20 strip_count = len(root) + len(os.sep)
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21 def walk(path, recurse):
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22 for e, kind, st in osutil.listdir(path, stat=True):
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23 pe = os.path.join(path, e)
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24 if kind == stat.S_IFDIR:
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25 if recurse:
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26 for x in walk(pe, True):
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27 yield x
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28 else:
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29 if kind != stat.S_IFREG or len(e) < 2:
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30 continue
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31 sfx = e[-2:]
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32 if sfx in ('.d', '.i'):
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33 yield pe[strip_count:], st.st_size
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34 # write file data first
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35 for x in walk(os.path.join(root, 'data'), True):
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36 yield x
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37 # write manifest before changelog
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38 meta = list(walk(root, False))
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39 meta.sort()
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40 meta.reverse()
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41 for x in meta:
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42 yield x
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43
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44 # stream file format is simple.
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45 #
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46 # server writes out line that says how many files, how many total
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47 # bytes. separator is ascii space, byte counts are strings.
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48 #
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49 # then for each file:
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50 #
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51 # server writes out line that says file name, how many bytes in
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52 # file. separator is ascii nul, byte count is string.
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53 #
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54 # server writes out raw file data.
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55
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56 def stream_out(repo, fileobj, untrusted=False):
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57 '''stream out all metadata files in repository.
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58 writes to file-like object, must support write() and optional flush().'''
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59
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60 if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted):
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61 fileobj.write('1\n')
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62 return
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63
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64 # get consistent snapshot of repo. lock during scan so lock not
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65 # needed while we stream, and commits can happen.
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66 repolock = None
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67 try:
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68 try:
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69 repolock = repo.lock()
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70 except (lock.LockHeld, lock.LockUnavailable), inst:
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71 repo.ui.warn('locking the repository failed: %s\n' % (inst,))
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72 fileobj.write('2\n')
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73 return
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74
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75 fileobj.write('0\n')
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76 repo.ui.debug('scanning\n')
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77 entries = []
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78 total_bytes = 0
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79 for name, size in walkrepo(repo.spath):
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80 name = repo.decodefn(util.pconvert(name))
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81 entries.append((name, size))
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82 total_bytes += size
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83 finally:
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84 del repolock
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85
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86 repo.ui.debug('%d files, %d bytes to transfer\n' %
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87 (len(entries), total_bytes))
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88 fileobj.write('%d %d\n' % (len(entries), total_bytes))
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89 for name, size in entries:
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90 repo.ui.debug('sending %s (%d bytes)\n' % (name, size))
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91 fileobj.write('%s\0%d\n' % (name, size))
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92 for chunk in util.filechunkiter(repo.sopener(name), limit=size):
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93 fileobj.write(chunk)
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94 flush = getattr(fileobj, 'flush', None)
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95 if flush: flush()