Mercurial > hg
annotate hgext/censor.py @ 27764:dd0c5f4d1b53
util: adjust 'datapath' to be correct in a frozen OS X package
Apparently unlike py2exe, py2app copies the Mercurial source tree as-is to a
Contents/Resources subdirectory of an app bundle, and places its binary stub in
Contents/MacOS. (The Windows install has the 'hgext' and 'mercurial' modules in
'lib/library.zip', while the help and templates subdirectories have been moved
out of the mercurial directory to the root of the installation. I assume that
the python code living in a zip file is why "py2exe doesn't support __file__".)
Therefore, prior to this change, Mercurial in a frozen app bundle on OS X would
go looking for help *.txt, templates and locale info in Contents/MacOS, where
they don't exist.
There are only a handful of places that test for frozen, and not all of them are
wrong for OS X, so it seems wiser to handle them on a case by case basis, rather
that try to change mainfrozen(). The remaining cases are:
1) util.hgexecutable() wrongly points to the bundled python executable, and
affects $HG in util.system() launched processes (e.g. external hooks)
2) util.hgcmd() wrongly points to the bundled python executable, but it seems
to only affect 'hg serve -d'
3) hook._pythonhook() may be OK, since I didn't see anything outrageous when
printing sys.path from an internal hook. I'm not sure if this special
case is needed on OS X though.
4) sslutil._plainapplepython() is OK, because sys.executable is not
/usr/bin/python, nor is it in /System/Library/Frameworks
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sun, 10 Jan 2016 17:49:01 -0500 |
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1 # Copyright (C) 2015 - Mike Edgar <adgar@google.com> |
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2 # |
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3 # This extension enables removal of file content at a given revision, |
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4 # rewriting the data/metadata of successive revisions to preserve revision log |
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5 # integrity. |
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6 |
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7 """erase file content at a given revision |
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8 |
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9 The censor command instructs Mercurial to erase all content of a file at a given |
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10 revision *without updating the changeset hash.* This allows existing history to |
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11 remain valid while preventing future clones/pulls from receiving the erased |
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12 data. |
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13 |
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14 Typical uses for censor are due to security or legal requirements, including:: |
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15 |
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16 * Passwords, private keys, cryptographic material |
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17 * Licensed data/code/libraries for which the license has expired |
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18 * Personally Identifiable Information or other private data |
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19 |
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20 Censored nodes can interrupt mercurial's typical operation whenever the excised |
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21 data needs to be materialized. Some commands, like ``hg cat``/``hg revert``, |
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22 simply fail when asked to produce censored data. Others, like ``hg verify`` and |
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23 ``hg update``, must be capable of tolerating censored data to continue to |
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24 function in a meaningful way. Such commands only tolerate censored file |
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25 revisions if they are allowed by the "censor.policy=ignore" config option. |
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26 """ |
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27 |
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28 from mercurial.node import short |
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29 from mercurial import cmdutil, error, filelog, revlog, scmutil, util |
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30 from mercurial.i18n import _ |
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31 from mercurial import lock as lockmod |
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32 |
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33 cmdtable = {} |
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34 command = cmdutil.command(cmdtable) |
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35 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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36 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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37 # be specifying the version(s) of Mercurial they are tested with, or |
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38 # leave the attribute unspecified. |
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39 testedwith = 'internal' |
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40 |
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41 @command('censor', |
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42 [('r', 'rev', '', _('censor file from specified revision'), _('REV')), |
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43 ('t', 'tombstone', '', _('replacement tombstone data'), _('TEXT'))], |
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44 _('-r REV [-t TEXT] [FILE]')) |
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45 def censor(ui, repo, path, rev='', tombstone='', **opts): |
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46 wlock = lock = None |
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47 try: |
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48 wlock = repo.wlock() |
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49 lock = repo.lock() |
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50 return _docensor(ui, repo, path, rev, tombstone, **opts) |
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51 finally: |
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52 lockmod.release(lock, wlock) |
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53 |
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54 def _docensor(ui, repo, path, rev='', tombstone='', **opts): |
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55 if not path: |
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56 raise error.Abort(_('must specify file path to censor')) |
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57 if not rev: |
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58 raise error.Abort(_('must specify revision to censor')) |
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59 |
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60 wctx = repo[None] |
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61 |
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62 m = scmutil.match(wctx, (path,)) |
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63 if m.anypats() or len(m.files()) != 1: |
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64 raise error.Abort(_('can only specify an explicit filename')) |
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65 path = m.files()[0] |
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66 flog = repo.file(path) |
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67 if not len(flog): |
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68 raise error.Abort(_('cannot censor file with no history')) |
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69 |
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70 rev = scmutil.revsingle(repo, rev, rev).rev() |
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71 try: |
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72 ctx = repo[rev] |
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73 except KeyError: |
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74 raise error.Abort(_('invalid revision identifier %s') % rev) |
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75 |
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76 try: |
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77 fctx = ctx.filectx(path) |
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78 except error.LookupError: |
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79 raise error.Abort(_('file does not exist at revision %s') % rev) |
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80 |
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81 fnode = fctx.filenode() |
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82 headctxs = [repo[c] for c in repo.heads()] |
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83 heads = [c for c in headctxs if path in c and c.filenode(path) == fnode] |
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84 if heads: |
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85 headlist = ', '.join([short(c.node()) for c in heads]) |
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86 raise error.Abort(_('cannot censor file in heads (%s)') % headlist, |
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87 hint=_('clean/delete and commit first')) |
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88 |
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89 wp = wctx.parents() |
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90 if ctx.node() in [p.node() for p in wp]: |
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91 raise error.Abort(_('cannot censor working directory'), |
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92 hint=_('clean/delete/update first')) |
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93 |
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94 flogv = flog.version & 0xFFFF |
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95 if flogv != revlog.REVLOGNG: |
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96 raise error.Abort( |
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97 _('censor does not support revlog version %d') % (flogv,)) |
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98 |
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99 tombstone = filelog.packmeta({"censored": tombstone}, "") |
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100 |
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101 crev = fctx.filerev() |
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102 |
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103 if len(tombstone) > flog.rawsize(crev): |
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104 raise error.Abort(_( |
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105 'censor tombstone must be no longer than censored data')) |
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106 |
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107 # Using two files instead of one makes it easy to rewrite entry-by-entry |
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108 idxread = repo.svfs(flog.indexfile, 'r') |
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109 idxwrite = repo.svfs(flog.indexfile, 'wb', atomictemp=True) |
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110 if flog.version & revlog.REVLOGNGINLINEDATA: |
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111 dataread, datawrite = idxread, idxwrite |
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112 else: |
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113 dataread = repo.svfs(flog.datafile, 'r') |
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114 datawrite = repo.svfs(flog.datafile, 'wb', atomictemp=True) |
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115 |
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116 # Copy all revlog data up to the entry to be censored. |
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117 rio = revlog.revlogio() |
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118 offset = flog.start(crev) |
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119 |
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120 for chunk in util.filechunkiter(idxread, limit=crev * rio.size): |
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121 idxwrite.write(chunk) |
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122 for chunk in util.filechunkiter(dataread, limit=offset): |
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123 datawrite.write(chunk) |
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124 |
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125 def rewriteindex(r, newoffs, newdata=None): |
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126 """Rewrite the index entry with a new data offset and optional new data. |
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127 |
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128 The newdata argument, if given, is a tuple of three positive integers: |
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129 (new compressed, new uncompressed, added flag bits). |
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130 """ |
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131 offlags, comp, uncomp, base, link, p1, p2, nodeid = flog.index[r] |
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132 flags = revlog.gettype(offlags) |
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133 if newdata: |
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134 comp, uncomp, nflags = newdata |
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135 flags |= nflags |
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136 offlags = revlog.offset_type(newoffs, flags) |
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137 e = (offlags, comp, uncomp, r, link, p1, p2, nodeid) |
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138 idxwrite.write(rio.packentry(e, None, flog.version, r)) |
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139 idxread.seek(rio.size, 1) |
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140 |
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141 def rewrite(r, offs, data, nflags=revlog.REVIDX_DEFAULT_FLAGS): |
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142 """Write the given full text to the filelog with the given data offset. |
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143 |
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144 Returns: |
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145 The integer number of data bytes written, for tracking data offsets. |
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146 """ |
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147 flag, compdata = flog.compress(data) |
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148 newcomp = len(flag) + len(compdata) |
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149 rewriteindex(r, offs, (newcomp, len(data), nflags)) |
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150 datawrite.write(flag) |
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151 datawrite.write(compdata) |
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152 dataread.seek(flog.length(r), 1) |
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153 return newcomp |
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154 |
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155 # Rewrite censored revlog entry with (padded) tombstone data. |
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156 pad = ' ' * (flog.rawsize(crev) - len(tombstone)) |
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157 offset += rewrite(crev, offset, tombstone + pad, revlog.REVIDX_ISCENSORED) |
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158 |
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159 # Rewrite all following filelog revisions fixing up offsets and deltas. |
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160 for srev in xrange(crev + 1, len(flog)): |
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161 if crev in flog.parentrevs(srev): |
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162 # Immediate children of censored node must be re-added as fulltext. |
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163 try: |
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164 revdata = flog.revision(srev) |
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165 except error.CensoredNodeError as e: |
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166 revdata = e.tombstone |
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167 dlen = rewrite(srev, offset, revdata) |
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168 else: |
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169 # Copy any other revision data verbatim after fixing up the offset. |
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170 rewriteindex(srev, offset) |
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171 dlen = flog.length(srev) |
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172 for chunk in util.filechunkiter(dataread, limit=dlen): |
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173 datawrite.write(chunk) |
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174 offset += dlen |
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175 |
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176 idxread.close() |
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177 idxwrite.close() |
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178 if dataread is not idxread: |
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179 dataread.close() |
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180 datawrite.close() |