annotate contrib/shrink-revlog.py @ 13542:6e3bf361f70c

Merge with stable
author Patrick Mezard <pmezard@gmail.com>
date Sun, 06 Mar 2011 15:30:39 +0100
parents 4c50552fc9bc
children 9131724c3f4b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 """\
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2 reorder a revlog (the manifest by default) to save space
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3
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4 Specifically, this topologically sorts the revisions in the revlog so that
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5 revisions on the same branch are adjacent as much as possible. This is a
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6 workaround for the fact that Mercurial computes deltas relative to the
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7 previous revision rather than relative to a parent revision.
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8
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9 This is *not* safe to run on a changelog.
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10 """
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11
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12 # Originally written by Benoit Boissinot <benoit.boissinot at ens-lyon.org>
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13 # as a patch to rewrite-log. Cleaned up, refactored, documented, and
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14 # renamed by Greg Ward <greg at gerg.ca>.
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15
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16 # XXX would be nice to have a way to verify the repository after shrinking,
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17 # e.g. by comparing "before" and "after" states of random changesets
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18 # (maybe: export before, shrink, export after, diff).
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19
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20 import os, tempfile, errno
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21 from mercurial import revlog, transaction, node, util
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22 from mercurial import changegroup
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23 from mercurial.i18n import _
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24
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25
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26 def postorder(start, edges):
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27 result = []
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28 visit = list(start)
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29 finished = set()
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30
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31 while visit:
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32 cur = visit[-1]
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33 for p in edges[cur]:
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34 if p not in finished:
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35 visit.append(p)
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36 break
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37 else:
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38 result.append(cur)
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39 finished.add(cur)
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40 visit.pop()
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41
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42 return result
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43
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44 def toposort_reversepostorder(ui, rl):
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45 # postorder of the reverse directed graph
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46
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47 # map rev to list of parent revs (p2 first)
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48 parents = {}
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49 heads = set()
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50 ui.status(_('reading revs\n'))
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51 try:
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52 for rev in rl:
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53 ui.progress(_('reading'), rev, total=len(rl))
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54 (p1, p2) = rl.parentrevs(rev)
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55 if p1 == p2 == node.nullrev:
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56 parents[rev] = () # root node
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57 elif p1 == p2 or p2 == node.nullrev:
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58 parents[rev] = (p1,) # normal node
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59 else:
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60 parents[rev] = (p2, p1) # merge node
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61 heads.add(rev)
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62 for p in parents[rev]:
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63 heads.discard(p)
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64 finally:
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65 ui.progress(_('reading'), None)
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66
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67 heads = list(heads)
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68 heads.sort(reverse=True)
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69
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70 ui.status(_('sorting revs\n'))
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71 return postorder(heads, parents)
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72
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73 def toposort_postorderreverse(ui, rl):
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74 # reverse-postorder of the reverse directed graph
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75
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76 children = {}
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77 roots = set()
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78 ui.status(_('reading revs\n'))
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79 try:
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80 for rev in rl:
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81 ui.progress(_('reading'), rev, total=len(rl))
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82 (p1, p2) = rl.parentrevs(rev)
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83 if p1 == p2 == node.nullrev:
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84 roots.add(rev)
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85 children[rev] = []
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86 if p1 != node.nullrev:
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87 children[p1].append(rev)
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88 if p2 != node.nullrev:
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89 children[p2].append(rev)
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90 finally:
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91 ui.progress(_('reading'), None)
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92
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93 roots = list(roots)
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94 roots.sort()
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95
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96 ui.status(_('sorting revs\n'))
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97 result = postorder(roots, children)
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98 result.reverse()
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99 return result
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100
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101 def writerevs(ui, r1, r2, order, tr):
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102
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103 ui.status(_('writing revs\n'))
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104
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105 count = [0]
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106 def progress(*args):
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107 ui.progress(_('writing'), count[0], total=len(order))
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108 count[0] += 1
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109
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110 order = [r1.node(r) for r in order]
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111
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112 # this is a bit ugly, but it works
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113 lookup = lambda x: "%020d" % r1.linkrev(r1.rev(x))
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114 unlookup = lambda x: int(x, 10)
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115
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116 try:
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117 group = util.chunkbuffer(r1.group(order, lookup, progress))
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118 group = changegroup.unbundle10(group, "UN")
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119 r2.addgroup(group, unlookup, tr)
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120 finally:
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121 ui.progress(_('writing'), None)
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122
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123 def report(ui, r1, r2):
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
124 def getsize(r):
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
125 s = 0
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
126 for fn in (r.indexfile, r.datafile):
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
127 try:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
128 s += os.stat(fn).st_size
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
129 except OSError, inst:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
130 if inst.errno != errno.ENOENT:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
131 raise
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
132 return s
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
133
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
134 oldsize = float(getsize(r1))
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
135 newsize = float(getsize(r2))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
136
9712
18b134ef294c kill trailing whitespace
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 9515
diff changeset
137 # argh: have to pass an int to %d, because a float >= 2^32
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
138 # blows up under Python 2.5 or earlier
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
139 ui.write(_('old file size: %12d bytes (%6.1f MiB)\n')
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10241
diff changeset
140 % (int(oldsize), oldsize / 1024 / 1024))
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
141 ui.write(_('new file size: %12d bytes (%6.1f MiB)\n')
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10241
diff changeset
142 % (int(newsize), newsize / 1024 / 1024))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
143
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
144 shrink_percent = (oldsize - newsize) / oldsize * 100
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
145 shrink_factor = oldsize / newsize
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
146 ui.write(_('shrinkage: %.1f%% (%.1fx)\n')
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
147 % (shrink_percent, shrink_factor))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
148
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
149 def shrink(ui, repo, **opts):
10622
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
150 """shrink a revlog by reordering revisions
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
151
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
152 Rewrites all the entries in some revlog of the current repository
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
153 (by default, the manifest log) to save space.
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
154
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
155 Different sort algorithms have different performance
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
156 characteristics. Use ``--sort`` to select a sort algorithm so you
10625
add562abc28a shrink-revlog: remove branchsort algorithm (it behaves poorly)
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10624
diff changeset
157 can determine which works best for your data.
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
158 """
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
159
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
160 if not repo.local():
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
161 raise util.Abort(_('not a local repository: %s') % repo.root)
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
162
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
163 fn = opts.get('revlog')
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
164 if not fn:
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
165 indexfn = repo.sjoin('00manifest.i')
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
166 else:
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
167 if not fn.endswith('.i'):
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
168 raise util.Abort(_('--revlog option must specify the revlog index '
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
169 'file (*.i), not %s') % opts.get('revlog'))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
170
10215
9d79b8f58bea contrib: turn shrink-revlog.py into an extension
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
171 indexfn = os.path.realpath(fn)
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
172 store = repo.sjoin('')
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
173 if not indexfn.startswith(store):
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
174 raise util.Abort(_('--revlog option must specify a revlog in %s, '
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
175 'not %s') % (store, indexfn))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
176
10622
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
177 sortname = opts['sort']
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
178 try:
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
179 toposort = globals()['toposort_' + sortname]
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
180 except KeyError:
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
181 raise util.Abort(_('no such toposort algorithm: %s') % sortname)
bc81f126139f shrink-revlog: add --sort option for user-selectable toposort algorithm.
Greg Ward <greg-hg@gerg.ca>
parents: 10621
diff changeset
182
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
183 if not os.path.exists(indexfn):
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
184 raise util.Abort(_('no such file: %s') % indexfn)
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
185 if '00changelog' in indexfn:
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
186 raise util.Abort(_('shrinking the changelog '
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
187 'will corrupt your repository'))
10542
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
188
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
189 ui.write(_('shrinking %s\n') % indexfn)
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
190 prefix = os.path.basename(indexfn)[:-1]
11294
7b5d05e0fb1e shrink-revlog: use util.mktempcopy() to preserve mode of index file.
Greg Ward <greg-hg@gerg.ca>
parents: 11268
diff changeset
191 tmpindexfn = util.mktempcopy(indexfn, emptyok=True)
10542
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
192
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
193 r1 = revlog.revlog(util.opener(os.getcwd(), audit=False), indexfn)
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
194 r2 = revlog.revlog(util.opener(os.getcwd(), audit=False), tmpindexfn)
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
195
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
196 datafn, tmpdatafn = r1.datafile, r2.datafile
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
197
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
198 oldindexfn = indexfn + '.old'
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
199 olddatafn = datafn + '.old'
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
200 if os.path.exists(oldindexfn) or os.path.exists(olddatafn):
10508
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
201 raise util.Abort(_('one or both of\n'
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
202 ' %s\n'
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
203 ' %s\n'
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
204 'exists from a previous run; please clean up '
cc35ad583e66 shrink-revlog: add strings for translation / import _ before using it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10496
diff changeset
205 'before running again') % (oldindexfn, olddatafn))
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
206
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
207 # Don't use repo.transaction(), because then things get hairy with
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
208 # paths: some need to be relative to .hg, and some need to be
10216
843f6ee6d14b contrib: small documentation fixes in shrink-revlog.py
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10215
diff changeset
209 # absolute. Doing it this way keeps things simple: everything is an
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
210 # absolute path.
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
211 lock = repo.lock(wait=False)
10234
c8d6f339bbd7 shrink-revlog: make it work on windows (issue1976)
Patrick Mezard <pmezard@gmail.com>
parents: 10230
diff changeset
212 tr = transaction.transaction(ui.warn,
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
213 open,
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
214 repo.sjoin('journal'))
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
215
10542
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
216 def ignoremissing(func):
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
217 def f(*args, **kw):
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
218 try:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
219 return func(*args, **kw)
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
220 except OSError, inst:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
221 if inst.errno != errno.ENOENT:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
222 raise
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
223 return f
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
224
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
225 try:
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
226 try:
10213
9e6848f352b0 contrib: use ui to write in shrink-revlog.py
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10009
diff changeset
227 order = toposort(ui, r1)
10626
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
228
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
229 suboptimal = 0
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
230 for i in xrange(1, len(order)):
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
231 parents = [p for p in r1.parentrevs(order[i])
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
232 if p != node.nullrev]
10655
f63fb5c0cf67 shrink-revlog: add missing whitespace in expression
Martin Geisler <mg@lazybytes.net>
parents: 10627
diff changeset
233 if parents and order[i - 1] not in parents:
10626
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
234 suboptimal += 1
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
235 ui.note(_('%d suboptimal nodes\n') % suboptimal)
3fc95c3bc3ba shrink-revlog: factor out suboptimal computation
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10625
diff changeset
236
10213
9e6848f352b0 contrib: use ui to write in shrink-revlog.py
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10009
diff changeset
237 writerevs(ui, r1, r2, order, tr)
10542
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
238 report(ui, r1, r2)
9515
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
239 tr.close()
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
240 except:
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
241 # Abort transaction first, so we truncate the files before
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
242 # deleting them.
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
243 tr.abort()
10542
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
244 for fn in (tmpindexfn, tmpdatafn):
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10509
diff changeset
245 ignoremissing(os.unlink)(fn)
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parents:
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246 raise
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247 if not opts.get('dry_run'):
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248 # racy, both files cannot be renamed atomically
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249 # copy files
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250 util.os_link(indexfn, oldindexfn)
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251 ignoremissing(util.os_link)(datafn, olddatafn)
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252
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253 # rename
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254 util.rename(tmpindexfn, indexfn)
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255 try:
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256 os.chmod(tmpdatafn, os.stat(datafn).st_mode)
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diff changeset
257 util.rename(tmpdatafn, datafn)
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diff changeset
258 except OSError, inst:
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259 if inst.errno != errno.ENOENT:
989b2a5eaaba shrink: handle all combinations of inline/non-inline revlogs
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parents: 10509
diff changeset
260 raise
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diff changeset
261 ignoremissing(os.unlink)(datafn)
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diff changeset
262 else:
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diff changeset
263 for fn in (tmpindexfn, tmpdatafn):
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diff changeset
264 ignoremissing(os.unlink)(fn)
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parents:
diff changeset
265 finally:
f7d85980261c Add script to rewrite revlog to workaround lack of parent deltas.
Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
266 lock.release()
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parents:
diff changeset
267
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diff changeset
268 if not opts.get('dry_run'):
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parents: 10496
diff changeset
269 ui.write(_('note: old revlog saved in:\n'
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diff changeset
270 ' %s\n'
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diff changeset
271 ' %s\n'
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parents: 10496
diff changeset
272 '(You can delete those files when you are satisfied that your\n'
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parents: 10496
diff changeset
273 'repository is still sane. '
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parents: 10496
diff changeset
274 'Running \'hg verify\' is strongly recommended.)\n')
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parents: 10236
diff changeset
275 % (oldindexfn, olddatafn))
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Greg Ward <greg-hg@gerg.ca>
parents:
diff changeset
276
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
277 cmdtable = {
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diff changeset
278 'shrink': (shrink,
10508
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parents: 10496
diff changeset
279 [('', 'revlog', '', _('index (.i) file of the revlog to shrink')),
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diff changeset
280 ('n', 'dry-run', None, _('do not shrink, simulate only')),
10625
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parents: 10624
diff changeset
281 ('', 'sort', 'reversepostorder', 'name of sort algorithm to use'),
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parents: 10236
diff changeset
282 ],
10508
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parents: 10496
diff changeset
283 _('hg shrink [--revlog PATH]'))
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Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 10214
diff changeset
284 }
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Greg Ward <greg-hg@gerg.ca>
parents: 10234
diff changeset
285
49a8625b8cac shrink-revlog: help/doc tweaks
Greg Ward <greg-hg@gerg.ca>
parents: 10234
diff changeset
286 if __name__ == "__main__":
10282
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Matt Mackall <mpm@selenic.com>
parents: 10241
diff changeset
287 print "shrink-revlog.py is now an extension (see hg help extensions)"