annotate mercurial/branchmap.py @ 36280:685bcdd236b5

wireprotoserver: py3 helpfully calls adds HTTP_ to CONTENT_LENGTH Just handle both with a membership check, preferring the HTTP_ namespaced version. Sigh. Differential Revision: https://phab.mercurial-scm.org/D2310
author Augie Fackler <augie@google.com>
date Sun, 18 Feb 2018 00:02:33 -0500
parents 46260fac5563
children 743b293c3ca0
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1 # branchmap.py - logic to computes, maintain and stores branchmap for local repo
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import struct
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11
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12 from .node import (
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13 bin,
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14 hex,
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15 nullid,
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16 nullrev,
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17 )
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18 from . import (
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19 encoding,
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20 error,
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21 pycompat,
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22 scmutil,
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23 util,
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24 )
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25
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26 calcsize = struct.calcsize
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27 pack_into = struct.pack_into
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28 unpack_from = struct.unpack_from
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29
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30 def _filename(repo):
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31 """name of a branchcache file for a given repo or repoview"""
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32 filename = "branch2"
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33 if repo.filtername:
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34 filename = '%s-%s' % (filename, repo.filtername)
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35 return filename
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36
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37 def read(repo):
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38 try:
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39 f = repo.cachevfs(_filename(repo))
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40 lines = f.read().split('\n')
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41 f.close()
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42 except (IOError, OSError):
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43 return None
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44
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45 try:
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46 cachekey = lines.pop(0).split(" ", 2)
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47 last, lrev = cachekey[:2]
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48 last, lrev = bin(last), int(lrev)
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49 filteredhash = None
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50 if len(cachekey) > 2:
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51 filteredhash = bin(cachekey[2])
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52 partial = branchcache(tipnode=last, tiprev=lrev,
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53 filteredhash=filteredhash)
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54 if not partial.validfor(repo):
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55 # invalidate the cache
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56 raise ValueError(r'tip differs')
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57 cl = repo.changelog
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58 for l in lines:
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59 if not l:
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60 continue
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61 node, state, label = l.split(" ", 2)
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62 if state not in 'oc':
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63 raise ValueError(r'invalid branch state')
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64 label = encoding.tolocal(label.strip())
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65 node = bin(node)
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66 if not cl.hasnode(node):
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67 raise ValueError(
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68 r'node %s does not exist' % pycompat.sysstr(hex(node)))
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69 partial.setdefault(label, []).append(node)
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70 if state == 'c':
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71 partial._closednodes.add(node)
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72 except Exception as inst:
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73 if repo.ui.debugflag:
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74 msg = 'invalid branchheads cache'
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75 if repo.filtername is not None:
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76 msg += ' (%s)' % repo.filtername
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77 msg += ': %s\n'
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78 repo.ui.debug(msg % pycompat.bytestr(inst))
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79 partial = None
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80 return partial
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81
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82 ### Nearest subset relation
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83 # Nearest subset of filter X is a filter Y so that:
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84 # * Y is included in X,
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85 # * X - Y is as small as possible.
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86 # This create and ordering used for branchmap purpose.
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87 # the ordering may be partial
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88 subsettable = {None: 'visible',
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89 'visible-hidden': 'visible',
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90 'visible': 'served',
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91 'served': 'immutable',
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92 'immutable': 'base'}
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93
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94 def updatecache(repo):
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95 cl = repo.changelog
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96 filtername = repo.filtername
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97 partial = repo._branchcaches.get(filtername)
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98
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99 revs = []
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100 if partial is None or not partial.validfor(repo):
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101 partial = read(repo)
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102 if partial is None:
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103 subsetname = subsettable.get(filtername)
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104 if subsetname is None:
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105 partial = branchcache()
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106 else:
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107 subset = repo.filtered(subsetname)
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108 partial = subset.branchmap().copy()
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109 extrarevs = subset.changelog.filteredrevs - cl.filteredrevs
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110 revs.extend(r for r in extrarevs if r <= partial.tiprev)
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111 revs.extend(cl.revs(start=partial.tiprev + 1))
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112 if revs:
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113 partial.update(repo, revs)
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114 partial.write(repo)
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115
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116 assert partial.validfor(repo), filtername
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117 repo._branchcaches[repo.filtername] = partial
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118
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119 def replacecache(repo, bm):
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120 """Replace the branchmap cache for a repo with a branch mapping.
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121
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122 This is likely only called during clone with a branch map from a remote.
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123 """
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124 rbheads = []
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125 closed = []
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
126 for bheads in bm.itervalues():
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
127 rbheads.extend(bheads)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
128 for h in bheads:
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
129 r = repo.changelog.rev(h)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
130 b, c = repo.changelog.branchinfo(r)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
131 if c:
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
132 closed.append(h)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
133
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
134 if rbheads:
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
135 rtiprev = max((int(repo.changelog.rev(node))
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
136 for node in rbheads))
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
137 cache = branchcache(bm,
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
138 repo[rtiprev].node(),
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
139 rtiprev,
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
140 closednodes=closed)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
141
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
142 # Try to stick it as low as possible
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
143 # filter above served are unlikely to be fetch from a clone
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
144 for candidate in ('base', 'immutable', 'served'):
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
145 rview = repo.filtered(candidate)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
146 if cache.validfor(rview):
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
147 repo._branchcaches[candidate] = cache
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
148 cache.write(rview)
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
149 break
79ef867538ea branchmap: move branch cache code out of streamclone.py
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25918
diff changeset
150
18124
79db6d40bced branchmap: store branchcache in a dedicated object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18121
diff changeset
151 class branchcache(dict):
20181
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
152 """A dict like object that hold branches heads cache.
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
153
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
154 This cache is used to avoid costly computations to determine all the
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
155 branch heads of a repo.
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
156
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
157 The cache is serialized on disk in the following format:
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
158
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
159 <tip hex node> <tip rev number> [optional filtered repo hex hash]
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
160 <branch head hex node> <open/closed state> <branch name>
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
161 <branch head hex node> <open/closed state> <branch name>
20181
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
162 ...
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
163
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
164 The first line is used to check if the cache is still valid. If the
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
165 branch cache is for a filtered repo view, an optional third hash is
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
166 included that hashes the hashes of all filtered revisions.
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
167
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
168 The open/closed state is represented by a single letter 'o' or 'c'.
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
169 This field can be used to avoid changelog reads when determining if a
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
170 branch head closes a branch or not.
20181
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
171 """
18124
79db6d40bced branchmap: store branchcache in a dedicated object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18121
diff changeset
172
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
173 def __init__(self, entries=(), tipnode=nullid, tiprev=nullrev,
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
174 filteredhash=None, closednodes=None):
18125
ad194a8ab5c1 branchmap: add the tipnode (cache key) on the branchcache object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18124
diff changeset
175 super(branchcache, self).__init__(entries)
ad194a8ab5c1 branchmap: add the tipnode (cache key) on the branchcache object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18124
diff changeset
176 self.tipnode = tipnode
18126
090ada0acddb branchmap: add the tiprev (cache key) on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18125
diff changeset
177 self.tiprev = tiprev
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
178 self.filteredhash = filteredhash
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
179 # closednodes is a set of nodes that close their branch. If the branch
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
180 # cache has been updated, it may contain nodes that are no longer
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
181 # heads.
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
182 if closednodes is None:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
183 self._closednodes = set()
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
184 else:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
185 self._closednodes = closednodes
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
186
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
187 def validfor(self, repo):
18644
3e92772d5383 spelling: fix some minor issues found by spell checker
Mads Kiilerich <mads@kiilerich.com>
parents: 18451
diff changeset
188 """Is the cache content valid regarding a repo
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
189
18644
3e92772d5383 spelling: fix some minor issues found by spell checker
Mads Kiilerich <mads@kiilerich.com>
parents: 18451
diff changeset
190 - False when cached tipnode is unknown or if we detect a strip.
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
191 - True when cache is up to date or a subset of current repo."""
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
192 try:
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
193 return ((self.tipnode == repo.changelog.node(self.tiprev))
24723
467a33142425 repoview: move function for computing filtered hash
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
194 and (self.filteredhash == \
467a33142425 repoview: move function for computing filtered hash
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
195 scmutil.filteredhash(repo, self.tiprev)))
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
196 except IndexError:
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
197 return False
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
198
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
199 def _branchtip(self, heads):
20245
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
200 '''Return tuple with last open head in heads and false,
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
201 otherwise return last closed head and true.'''
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
202 tip = heads[-1]
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
203 closed = True
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
204 for h in reversed(heads):
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
205 if h not in self._closednodes:
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
206 tip = h
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
207 closed = False
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
208 break
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
209 return tip, closed
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
210
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
211 def branchtip(self, branch):
20245
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
212 '''Return the tipmost open head on branch head, otherwise return the
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
213 tipmost closed head on branch.
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
214 Raise KeyError for unknown branch.'''
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
215 return self._branchtip(self[branch])[0]
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
216
34074
abf91c4f9608 branches: correctly show inactive multiheaded branches
the31k <the31k@thethirty.one>
parents: 33663
diff changeset
217 def iteropen(self, nodes):
abf91c4f9608 branches: correctly show inactive multiheaded branches
the31k <the31k@thethirty.one>
parents: 33663
diff changeset
218 return (n for n in nodes if n not in self._closednodes)
abf91c4f9608 branches: correctly show inactive multiheaded branches
the31k <the31k@thethirty.one>
parents: 33663
diff changeset
219
20188
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
220 def branchheads(self, branch, closed=False):
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
221 heads = self[branch]
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
222 if not closed:
34074
abf91c4f9608 branches: correctly show inactive multiheaded branches
the31k <the31k@thethirty.one>
parents: 33663
diff changeset
223 heads = list(self.iteropen(heads))
20188
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
224 return heads
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
225
20190
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
226 def iterbranches(self):
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
227 for bn, heads in self.iteritems():
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
228 yield (bn, heads) + self._branchtip(heads)
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
229
18232
dd0b636b0b65 branchmap: add a copy method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18218
diff changeset
230 def copy(self):
dd0b636b0b65 branchmap: add a copy method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18218
diff changeset
231 """return an deep copy of the branchcache object"""
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
232 return branchcache(self, self.tipnode, self.tiprev, self.filteredhash,
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
233 self._closednodes)
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
234
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
235 def write(self, repo):
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
236 try:
33534
2715a4fc0684 cachevfs: use the new vfs in when computing branchmap cache
Boris Feld <boris.feld@octobus.net>
parents: 32281
diff changeset
237 f = repo.cachevfs(_filename(repo), "w", atomictemp=True)
31348
fc06c5260639 branchmap: stringify int in a portable way
Augie Fackler <augie@google.com>
parents: 31347
diff changeset
238 cachekey = [hex(self.tipnode), '%d' % self.tiprev]
18184
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
239 if self.filteredhash is not None:
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
240 cachekey.append(hex(self.filteredhash))
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
241 f.write(" ".join(cachekey) + '\n')
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
242 nodecount = 0
18357
a4ab37ca887b localrepo: store branchheads sorted
Mads Kiilerich <mads@kiilerich.com>
parents: 18307
diff changeset
243 for label, nodes in sorted(self.iteritems()):
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
244 for node in nodes:
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
245 nodecount += 1
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
246 if node in self._closednodes:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
247 state = 'c'
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
248 else:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
249 state = 'o'
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
250 f.write("%s %s %s\n" % (hex(node), state,
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
251 encoding.fromlocal(label)))
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
252 f.close()
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
253 repo.ui.log('branchcache',
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
254 'wrote %s branch cache with %d labels and %d nodes\n',
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
255 repo.filtername, len(self), nodecount)
26587
56b2bcea2529 error: get Abort from 'error' instead of 'util'
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 26460
diff changeset
256 except (IOError, OSError, error.Abort) as inst:
34370
d0db41af73c0 branchmap: remove superfluous pass statements
Augie Fackler <augie@google.com>
parents: 34074
diff changeset
257 # Abort may be raised by read only opener, so log and continue
21788
c20843aee8a4 branch: add debug message for branch cache write failure
Matt Mackall <mpm@selenic.com>
parents: 21031
diff changeset
258 repo.ui.debug("couldn't write branch cache: %s\n" % inst)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
259
18305
2502a15e033d branchmap: pass revision insteads of changectx to the update function
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18234
diff changeset
260 def update(self, repo, revgen):
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
261 """Given a branchhead cache, self, that may have extra nodes or be
20263
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
262 missing heads, and a generator of nodes that are strictly a superset of
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
263 heads missing, this function updates self to be correct.
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
264 """
30975
22fbca1d11ed mercurial: switch to util.timer for all interval timings
Simon Farnsworth <simonfar@fb.com>
parents: 29746
diff changeset
265 starttime = util.timer()
18131
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
266 cl = repo.changelog
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
267 # collect new branch entries
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
268 newbranches = {}
24373
59cc09240afb revbranchcache: move out of branchmap onto localrepo
Durham Goode <durham@fb.com>
parents: 24163
diff changeset
269 getbranchinfo = repo.revbranchcache().branchinfo
18307
0eed2546118a branchmap: Save changectx creation during update
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18305
diff changeset
270 for r in revgen:
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
271 branch, closesbranch = getbranchinfo(r)
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
272 newbranches.setdefault(branch, []).append(r)
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
273 if closesbranch:
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
274 self._closednodes.add(cl.node(r))
22357
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
275
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
276 # fetch current topological heads to speed up filtering
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Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
277 topoheads = set(cl.headrevs())
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
278
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
279 # if older branchheads are reachable from new ones, they aren't
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
280 # really branchheads. Note checking parents is insufficient:
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
281 # 1 (branch a) -> 2 (branch b) -> 3 (branch a)
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
282 for branch, newheadrevs in newbranches.iteritems():
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
283 bheads = self.setdefault(branch, [])
20264
d9e1c167943b branchmap: use set for update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20263
diff changeset
284 bheadset = set(cl.rev(node) for node in bheads)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
285
20263
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
286 # This have been tested True on all internal usage of this function.
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
287 # run it again in case of doubt
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
288 # assert not (set(bheadrevs) & set(newheadrevs))
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
289 newheadrevs.sort()
20264
d9e1c167943b branchmap: use set for update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20263
diff changeset
290 bheadset.update(newheadrevs)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
291
22356
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
292 # This prunes out two kinds of heads - heads that are superseded by
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
293 # a head in newheadrevs, and newheadrevs that are not heads because
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
294 # an existing head is their descendant.
22357
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
295 uncertain = bheadset - topoheads
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
296 if uncertain:
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
297 floorrev = min(uncertain)
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
298 ancestors = set(cl.ancestors(newheadrevs, floorrev))
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
299 bheadset -= ancestors
20264
d9e1c167943b branchmap: use set for update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20263
diff changeset
300 bheadrevs = sorted(bheadset)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
301 self[branch] = [cl.node(rev) for rev in bheadrevs]
20263
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
302 tiprev = bheadrevs[-1]
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
303 if tiprev > self.tiprev:
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
304 self.tipnode = cl.node(tiprev)
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
305 self.tiprev = tiprev
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
306
19838
23386881abeb branchmap: remove the droppednodes logic
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 19837
diff changeset
307 if not self.validfor(repo):
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
308 # cache key are not valid anymore
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
309 self.tipnode = nullid
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
310 self.tiprev = nullrev
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
311 for heads in self.values():
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
312 tiprev = max(cl.rev(node) for node in heads)
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
313 if tiprev > self.tiprev:
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
314 self.tipnode = cl.node(tiprev)
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
315 self.tiprev = tiprev
24723
467a33142425 repoview: move function for computing filtered hash
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
316 self.filteredhash = scmutil.filteredhash(repo, self.tiprev)
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
317
30975
22fbca1d11ed mercurial: switch to util.timer for all interval timings
Simon Farnsworth <simonfar@fb.com>
parents: 29746
diff changeset
318 duration = util.timer() - starttime
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
319 repo.ui.log('branchcache', 'updated %s branch cache in %.4f seconds\n',
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
320 repo.filtername, duration)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
321
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
322 # Revision branch info cache
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
323
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
324 _rbcversion = '-v1'
33535
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
325 _rbcnames = 'rbc-names' + _rbcversion
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
326 _rbcrevs = 'rbc-revs' + _rbcversion
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
327 # [4 byte hash prefix][4 byte branch name number with sign bit indicating open]
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
328 _rbcrecfmt = '>4sI'
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
329 _rbcrecsize = calcsize(_rbcrecfmt)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
330 _rbcnodelen = 4
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
331 _rbcbranchidxmask = 0x7fffffff
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
332 _rbccloseflag = 0x80000000
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
333
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
334 class revbranchcache(object):
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
335 """Persistent cache, mapping from revision number to branch name and close.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
336 This is a low level cache, independent of filtering.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
337
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
338 Branch names are stored in rbc-names in internal encoding separated by 0.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
339 rbc-names is append-only, and each branch name is only stored once and will
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
340 thus have a unique index.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
341
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
342 The branch info for each revision is stored in rbc-revs as constant size
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
343 records. The whole file is read into memory, but it is only 'parsed' on
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
344 demand. The file is usually append-only but will be truncated if repo
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
345 modification is detected.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
346 The record for each revision contains the first 4 bytes of the
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
347 corresponding node hash, and the record is only used if it still matches.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
348 Even a completely trashed rbc-revs fill thus still give the right result
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
349 while converging towards full recovery ... assuming no incorrectly matching
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
350 node hashes.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
351 The record also contains 4 bytes where 31 bits contains the index of the
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
352 branch and the last bit indicate that it is a branch close commit.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
353 The usage pattern for rbc-revs is thus somewhat similar to 00changelog.i
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
354 and will grow with it but be 1/8th of its size.
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
355 """
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
356
24159
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Mads Kiilerich <madski@unity3d.com>
parents: 23877
diff changeset
357 def __init__(self, repo, readonly=True):
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
358 assert repo.filtername is None
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
359 self._repo = repo
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
360 self._names = [] # branch names in local encoding with static index
31346
2a18e9e6ca43 py3: use bytearray() instead of array('c', ...) constructions
Augie Fackler <augie@google.com>
parents: 30975
diff changeset
361 self._rbcrevs = bytearray()
29615
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
362 self._rbcsnameslen = 0 # length of names read at _rbcsnameslen
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
363 try:
33535
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
364 bndata = repo.cachevfs.read(_rbcnames)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
365 self._rbcsnameslen = len(bndata) # for verification before writing
31371
7dd2f51f38ac rbc: empty (and invalid) rbc-names file should give an empty name list
Mads Kiilerich <mads@kiilerich.com>
parents: 31370
diff changeset
366 if bndata:
7dd2f51f38ac rbc: empty (and invalid) rbc-names file should give an empty name list
Mads Kiilerich <mads@kiilerich.com>
parents: 31370
diff changeset
367 self._names = [encoding.tolocal(bn)
7dd2f51f38ac rbc: empty (and invalid) rbc-names file should give an empty name list
Mads Kiilerich <mads@kiilerich.com>
parents: 31370
diff changeset
368 for bn in bndata.split('\0')]
29423
d2c6f3a948fa branchmap: remove unused exception variable
Gregory Szorc <gregory.szorc@gmail.com>
parents: 28558
diff changeset
369 except (IOError, OSError):
24159
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Mads Kiilerich <madski@unity3d.com>
parents: 23877
diff changeset
370 if readonly:
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Mads Kiilerich <madski@unity3d.com>
parents: 23877
diff changeset
371 # don't try to use cache - fall back to the slow path
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Mads Kiilerich <madski@unity3d.com>
parents: 23877
diff changeset
372 self.branchinfo = self._branchinfo
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Mads Kiilerich <madski@unity3d.com>
parents: 23877
diff changeset
373
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
374 if self._names:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
375 try:
33535
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
376 data = repo.cachevfs.read(_rbcrevs)
31346
2a18e9e6ca43 py3: use bytearray() instead of array('c', ...) constructions
Augie Fackler <augie@google.com>
parents: 30975
diff changeset
377 self._rbcrevs[:] = data
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25266
diff changeset
378 except (IOError, OSError) as inst:
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
379 repo.ui.debug("couldn't read revision branch cache: %s\n" %
36201
46260fac5563 py3: stringify IOError/OSError without loosing local character
Yuya Nishihara <yuya@tcha.org>
parents: 36150
diff changeset
380 util.forcebytestr(inst))
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
381 # remember number of good records on disk
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
382 self._rbcrevslen = min(len(self._rbcrevs) // _rbcrecsize,
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
383 len(repo.changelog))
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
384 if self._rbcrevslen == 0:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
385 self._names = []
29615
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
386 self._rbcnamescount = len(self._names) # number of names read at
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
387 # _rbcsnameslen
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
388 self._namesreverse = dict((b, r) for r, b in enumerate(self._names))
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
389
28558
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
390 def _clear(self):
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
391 self._rbcsnameslen = 0
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
392 del self._names[:]
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
393 self._rbcnamescount = 0
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
394 self._namesreverse.clear()
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
395 self._rbcrevslen = len(self._repo.changelog)
31346
2a18e9e6ca43 py3: use bytearray() instead of array('c', ...) constructions
Augie Fackler <augie@google.com>
parents: 30975
diff changeset
396 self._rbcrevs = bytearray(self._rbcrevslen * _rbcrecsize)
28558
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
397
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
398 def branchinfo(self, rev):
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
399 """Return branch name and close flag for rev, using and updating
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
400 persistent cache."""
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
401 changelog = self._repo.changelog
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
402 rbcrevidx = rev * _rbcrecsize
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
403
25266
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
404 # avoid negative index, changelog.read(nullrev) is fast without cache
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
405 if rev == nullrev:
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
406 return changelog.branchinfo(rev)
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
407
29604
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
408 # if requested rev isn't allocated, grow and cache the rev info
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
409 if len(self._rbcrevs) < rbcrevidx + _rbcrecsize:
29604
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
410 return self._branchinfo(rev)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
411
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
412 # fast path: extract data from cache, use it if node is matching
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
413 reponode = changelog.node(rev)[:_rbcnodelen]
33663
1814ca418b30 branchmap: revert c34532365b38 for Python 2.7 compatibility
Mike Hommey <mh@glandium.org>
parents: 33535
diff changeset
414 cachenode, branchidx = unpack_from(
1814ca418b30 branchmap: revert c34532365b38 for Python 2.7 compatibility
Mike Hommey <mh@glandium.org>
parents: 33535
diff changeset
415 _rbcrecfmt, util.buffer(self._rbcrevs), rbcrevidx)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
416 close = bool(branchidx & _rbccloseflag)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
417 if close:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
418 branchidx &= _rbcbranchidxmask
24376
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
419 if cachenode == '\0\0\0\0':
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
420 pass
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
421 elif cachenode == reponode:
29615
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
422 try:
28558
bcd106d456c4 cache: rebuild branch cache from scratch when inconsistencies are detected
Mads Kiilerich <madski@unity3d.com>
parents: 28557
diff changeset
423 return self._names[branchidx], close
29615
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
424 except IndexError:
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
425 # recover from invalid reference to unknown branch
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
426 self._repo.ui.debug("referenced branch names not found"
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
427 " - rebuilding revision branch cache from scratch\n")
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
428 self._clear()
24376
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
429 else:
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
430 # rev/node map has changed, invalidate the cache from here up
29615
a2a380e2750f rbc: fix superfluous rebuilding from scratch - don't abuse self._rbcnamescount
Mads Kiilerich <madski@unity3d.com>
parents: 29604
diff changeset
431 self._repo.ui.debug("history modification detected - truncating "
31497
a369482e9649 branchmap: be more careful about using %d on ints
Augie Fackler <augie@google.com>
parents: 31454
diff changeset
432 "revision branch cache to revision %d\n" % rev)
24376
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
433 truncate = rbcrevidx + _rbcrecsize
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
434 del self._rbcrevs[truncate:]
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
435 self._rbcrevslen = min(self._rbcrevslen, truncate)
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
436
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
437 # fall back to slow path and make sure it will be written to disk
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
438 return self._branchinfo(rev)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
439
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
440 def _branchinfo(self, rev):
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
441 """Retrieve branch info from changelog and update _rbcrevs"""
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
442 changelog = self._repo.changelog
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
443 b, close = changelog.branchinfo(rev)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
444 if b in self._namesreverse:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
445 branchidx = self._namesreverse[b]
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
446 else:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
447 branchidx = len(self._names)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
448 self._names.append(b)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
449 self._namesreverse[b] = branchidx
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
450 reponode = changelog.node(rev)
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
451 if close:
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
452 branchidx |= _rbccloseflag
24375
fe255b2525d5 revbranchcache: move entry writing to a separate function
Durham Goode <durham@fb.com>
parents: 24374
diff changeset
453 self._setcachedata(rev, reponode, branchidx)
fe255b2525d5 revbranchcache: move entry writing to a separate function
Durham Goode <durham@fb.com>
parents: 24374
diff changeset
454 return b, close
fe255b2525d5 revbranchcache: move entry writing to a separate function
Durham Goode <durham@fb.com>
parents: 24374
diff changeset
455
fe255b2525d5 revbranchcache: move entry writing to a separate function
Durham Goode <durham@fb.com>
parents: 24374
diff changeset
456 def _setcachedata(self, rev, node, branchidx):
fe255b2525d5 revbranchcache: move entry writing to a separate function
Durham Goode <durham@fb.com>
parents: 24374
diff changeset
457 """Writes the node's branch data to the in-memory cache data."""
31454
a5bad127128d branchmap: handle nullrev in setcachedata
Durham Goode <durham@fb.com>
parents: 31381
diff changeset
458 if rev == nullrev:
a5bad127128d branchmap: handle nullrev in setcachedata
Durham Goode <durham@fb.com>
parents: 31381
diff changeset
459 return
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
460 rbcrevidx = rev * _rbcrecsize
29604
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
461 if len(self._rbcrevs) < rbcrevidx + _rbcrecsize:
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
462 self._rbcrevs.extend('\0' *
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
463 (len(self._repo.changelog) * _rbcrecsize -
db0095c83344 rbc: fix invalid rbc-revs entries caused by missing cache growth
Mads Kiilerich <madski@unity3d.com>
parents: 29423
diff changeset
464 len(self._rbcrevs)))
31370
906be86990c4 rbc: use struct unpack_from and pack_into instead of unpack and pack
Mads Kiilerich <madski@unity3d.com>
parents: 31360
diff changeset
465 pack_into(_rbcrecfmt, self._rbcrevs, rbcrevidx, node, branchidx)
24376
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
466 self._rbcrevslen = min(self._rbcrevslen, rev)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
467
24377
656f93ce66d5 revbranchcache: move cache writing to the transaction finalizer
Durham Goode <durham@fb.com>
parents: 24376
diff changeset
468 tr = self._repo.currenttransaction()
656f93ce66d5 revbranchcache: move cache writing to the transaction finalizer
Durham Goode <durham@fb.com>
parents: 24376
diff changeset
469 if tr:
656f93ce66d5 revbranchcache: move cache writing to the transaction finalizer
Durham Goode <durham@fb.com>
parents: 24376
diff changeset
470 tr.addfinalize('write-revbranchcache', self.write)
656f93ce66d5 revbranchcache: move cache writing to the transaction finalizer
Durham Goode <durham@fb.com>
parents: 24376
diff changeset
471
656f93ce66d5 revbranchcache: move cache writing to the transaction finalizer
Durham Goode <durham@fb.com>
parents: 24376
diff changeset
472 def write(self, tr=None):
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
473 """Save branch cache if it is dirty."""
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
474 repo = self._repo
29744
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
475 wlock = None
29745
3b184adfb5be branchmap: simplify error handlind when writing rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29744
diff changeset
476 step = ''
29744
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
477 try:
29743
9f3c49ee4486 branchmap: preparatory indent of indent the branch rev writing code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29615
diff changeset
478 if self._rbcnamescount < len(self._names):
29745
3b184adfb5be branchmap: simplify error handlind when writing rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29744
diff changeset
479 step = ' names'
29744
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
480 wlock = repo.wlock(wait=False)
29746
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
481 if self._rbcnamescount != 0:
33535
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
482 f = repo.cachevfs.open(_rbcnames, 'ab')
29746
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
483 if f.tell() == self._rbcsnameslen:
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
484 f.write('\0')
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
485 else:
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
486 f.close()
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
487 repo.ui.debug("%s changed - rewriting it\n" % _rbcnames)
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
488 self._rbcnamescount = 0
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
489 self._rbcrevslen = 0
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
490 if self._rbcnamescount == 0:
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
491 # before rewriting names, make sure references are removed
33535
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
492 repo.cachevfs.unlinkpath(_rbcrevs, ignoremissing=True)
755e6532e81d cachevfs: migration the revbranchcache to 'cachevfs'
Boris Feld <boris.feld@octobus.net>
parents: 33534
diff changeset
493 f = repo.cachevfs.open(_rbcnames, 'wb')
29746
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
494 f.write('\0'.join(encoding.fromlocal(b)
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
495 for b in self._names[self._rbcnamescount:]))
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
496 self._rbcsnameslen = f.tell()
3dbc95f3eb31 branchmap: remove extra indent
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29745
diff changeset
497 f.close()
29743
9f3c49ee4486 branchmap: preparatory indent of indent the branch rev writing code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29615
diff changeset
498 self._rbcnamescount = len(self._names)
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
Mads Kiilerich <madski@unity3d.com>
parents: 22357
diff changeset
499
29743
9f3c49ee4486 branchmap: preparatory indent of indent the branch rev writing code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29615
diff changeset
500 start = self._rbcrevslen * _rbcrecsize
9f3c49ee4486 branchmap: preparatory indent of indent the branch rev writing code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29615
diff changeset
501 if start != len(self._rbcrevs):
29745
3b184adfb5be branchmap: simplify error handlind when writing rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29744
diff changeset
502 step = ''
29744
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
503 if wlock is None:
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
504 wlock = repo.wlock(wait=False)
29743
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parents: 29615
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505 revs = min(len(repo.changelog),
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506 len(self._rbcrevs) // _rbcrecsize)
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parents: 33534
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507 f = repo.cachevfs.open(_rbcrevs, 'ab')
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508 if f.tell() != start:
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parents: 33534
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509 repo.ui.debug("truncating cache/%s to %d\n"
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parents: 33534
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510 % (_rbcrevs, start))
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parents: 29745
diff changeset
511 f.seek(start)
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Mads Kiilerich <madski@unity3d.com>
parents: 28556
diff changeset
512 if f.tell() != start:
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513 start = 0
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parents: 28556
diff changeset
514 f.seek(start)
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parents: 29745
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515 f.truncate()
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diff changeset
516 end = revs * _rbcrecsize
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diff changeset
517 f.write(self._rbcrevs[start:end])
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parents: 29745
diff changeset
518 f.close()
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parents: 29615
diff changeset
519 self._rbcrevslen = revs
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29744
diff changeset
520 except (IOError, OSError, error.Abort, error.LockError) as inst:
3b184adfb5be branchmap: simplify error handlind when writing rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29744
diff changeset
521 repo.ui.debug("couldn't write revision branch cache%s: %s\n"
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parents: 29744
diff changeset
522 % (step, inst))
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
523 finally:
0d588332ad2c branchmap: acquires lock before writting the rev branch cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
524 if wlock is not None:
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 29743
diff changeset
525 wlock.release()