Mercurial > hg
annotate mercurial/repair.py @ 32129:f0ea0f642627
py3: make posix.getuser return a bytes
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Fri, 21 Apr 2017 00:53:38 +0530 |
parents | b6d792a9bd11 |
children | a2be2abe9476 |
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1 # repair.py - functions for repository repair for mercurial |
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2 # |
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3 # Copyright 2005, 2006 Chris Mason <mason@suse.com> |
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4 # Copyright 2007 Matt Mackall |
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5 # |
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6 # This software may be used and distributed according to the terms of the |
10263 | 7 # GNU General Public License version 2 or any later version. |
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8 |
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9 from __future__ import absolute_import |
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10 |
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11 import errno |
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12 import hashlib |
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13 |
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14 from .i18n import _ |
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15 from .node import short |
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16 from . import ( |
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17 bundle2, |
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18 changegroup, |
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19 error, |
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20 exchange, |
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21 obsolete, |
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22 util, |
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23 ) |
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24 |
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25 def _bundle(repo, bases, heads, node, suffix, compress=True): |
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26 """create a bundle with the specified revisions as a backup""" |
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27 cgversion = changegroup.safeversion(repo) |
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28 |
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29 cg = changegroup.changegroupsubset(repo, bases, heads, 'strip', |
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30 version=cgversion) |
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31 backupdir = "strip-backup" |
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32 vfs = repo.vfs |
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33 if not vfs.isdir(backupdir): |
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34 vfs.mkdir(backupdir) |
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35 |
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36 # Include a hash of all the nodes in the filename for uniqueness |
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37 allcommits = repo.set('%ln::%ln', bases, heads) |
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38 allhashes = sorted(c.hex() for c in allcommits) |
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39 totalhash = hashlib.sha1(''.join(allhashes)).hexdigest() |
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40 name = "%s/%s-%s-%s.hg" % (backupdir, short(node), totalhash[:8], suffix) |
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41 |
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42 comp = None |
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43 if cgversion != '01': |
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44 bundletype = "HG20" |
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45 if compress: |
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46 comp = 'BZ' |
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47 elif compress: |
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48 bundletype = "HG10BZ" |
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49 else: |
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50 bundletype = "HG10UN" |
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51 return bundle2.writebundle(repo.ui, cg, name, bundletype, vfs, |
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52 compression=comp) |
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53 |
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54 def _collectfiles(repo, striprev): |
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55 """find out the filelogs affected by the strip""" |
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56 files = set() |
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57 |
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58 for x in xrange(striprev, len(repo)): |
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59 files.update(repo[x].files()) |
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60 |
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61 return sorted(files) |
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62 |
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63 def _collectbrokencsets(repo, files, striprev): |
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64 """return the changesets which will be broken by the truncation""" |
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65 s = set() |
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66 def collectone(revlog): |
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67 _, brokenset = revlog.getstrippoint(striprev) |
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68 s.update([revlog.linkrev(r) for r in brokenset]) |
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69 |
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70 collectone(repo.manifestlog._revlog) |
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71 for fname in files: |
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72 collectone(repo.file(fname)) |
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73 |
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74 return s |
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75 |
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76 def strip(ui, repo, nodelist, backup=True, topic='backup'): |
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77 # This function operates within a transaction of its own, but does |
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78 # not take any lock on the repo. |
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79 # Simple way to maintain backwards compatibility for this |
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80 # argument. |
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81 if backup in ['none', 'strip']: |
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82 backup = False |
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83 |
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84 repo = repo.unfiltered() |
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85 repo.destroying() |
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86 |
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87 cl = repo.changelog |
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88 # TODO handle undo of merge sets |
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89 if isinstance(nodelist, str): |
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90 nodelist = [nodelist] |
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91 striplist = [cl.rev(node) for node in nodelist] |
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92 striprev = min(striplist) |
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93 |
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94 files = _collectfiles(repo, striprev) |
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95 saverevs = _collectbrokencsets(repo, files, striprev) |
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96 |
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97 # Some revisions with rev > striprev may not be descendants of striprev. |
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98 # We have to find these revisions and put them in a bundle, so that |
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99 # we can restore them after the truncations. |
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100 # To create the bundle we use repo.changegroupsubset which requires |
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101 # the list of heads and bases of the set of interesting revisions. |
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102 # (head = revision in the set that has no descendant in the set; |
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103 # base = revision in the set that has no ancestor in the set) |
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104 tostrip = set(striplist) |
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105 saveheads = set(saverevs) |
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106 for r in cl.revs(start=striprev + 1): |
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107 if any(p in tostrip for p in cl.parentrevs(r)): |
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108 tostrip.add(r) |
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109 |
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110 if r not in tostrip: |
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111 saverevs.add(r) |
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112 saveheads.difference_update(cl.parentrevs(r)) |
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113 saveheads.add(r) |
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114 saveheads = [cl.node(r) for r in saveheads] |
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115 |
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116 # compute base nodes |
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117 if saverevs: |
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118 descendants = set(cl.descendants(saverevs)) |
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119 saverevs.difference_update(descendants) |
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120 savebases = [cl.node(r) for r in saverevs] |
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121 stripbases = [cl.node(r) for r in tostrip] |
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122 |
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123 # For a set s, max(parents(s) - s) is the same as max(heads(::s - s)), but |
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124 # is much faster |
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125 newbmtarget = repo.revs('max(parents(%ld) - (%ld))', tostrip, tostrip) |
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126 if newbmtarget: |
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127 newbmtarget = repo[newbmtarget.first()].node() |
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128 else: |
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129 newbmtarget = '.' |
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130 |
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131 bm = repo._bookmarks |
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132 updatebm = [] |
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133 for m in bm: |
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134 rev = repo[bm[m]].rev() |
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135 if rev in tostrip: |
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136 updatebm.append(m) |
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137 |
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138 # create a changegroup for all the branches we need to keep |
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139 backupfile = None |
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140 vfs = repo.vfs |
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141 node = nodelist[-1] |
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142 if backup: |
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143 backupfile = _bundle(repo, stripbases, cl.heads(), node, topic) |
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144 repo.ui.status(_("saved backup bundle to %s\n") % |
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145 vfs.join(backupfile)) |
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146 repo.ui.log("backupbundle", "saved backup bundle to %s\n", |
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147 vfs.join(backupfile)) |
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148 tmpbundlefile = None |
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149 if saveheads: |
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150 # do not compress temporary bundle if we remove it from disk later |
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151 tmpbundlefile = _bundle(repo, savebases, saveheads, node, 'temp', |
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152 compress=False) |
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153 |
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154 mfst = repo.manifestlog._revlog |
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155 |
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156 curtr = repo.currenttransaction() |
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157 if curtr is not None: |
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158 del curtr # avoid carrying reference to transaction for nothing |
31645 | 159 raise error.ProgrammingError('cannot strip from inside a transaction') |
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160 |
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161 try: |
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162 with repo.transaction("strip") as tr: |
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163 offset = len(tr.entries) |
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164 |
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165 tr.startgroup() |
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166 cl.strip(striprev, tr) |
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167 mfst.strip(striprev, tr) |
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168 if 'treemanifest' in repo.requirements: # safe but unnecessary |
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169 # otherwise |
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170 for unencoded, encoded, size in repo.store.datafiles(): |
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171 if (unencoded.startswith('meta/') and |
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172 unencoded.endswith('00manifest.i')): |
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173 dir = unencoded[5:-12] |
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174 repo.manifestlog._revlog.dirlog(dir).strip(striprev, tr) |
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175 for fn in files: |
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176 repo.file(fn).strip(striprev, tr) |
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177 tr.endgroup() |
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178 |
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179 for i in xrange(offset, len(tr.entries)): |
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180 file, troffset, ignore = tr.entries[i] |
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181 with repo.svfs(file, 'a', checkambig=True) as fp: |
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182 fp.truncate(troffset) |
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183 if troffset == 0: |
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184 repo.store.markremoved(file) |
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185 |
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186 if tmpbundlefile: |
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187 ui.note(_("adding branch\n")) |
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188 f = vfs.open(tmpbundlefile, "rb") |
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189 gen = exchange.readbundle(ui, f, tmpbundlefile, vfs) |
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190 if not repo.ui.verbose: |
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191 # silence internal shuffling chatter |
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192 repo.ui.pushbuffer() |
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193 if isinstance(gen, bundle2.unbundle20): |
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194 with repo.transaction('strip') as tr: |
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195 tr.hookargs = {'source': 'strip', |
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196 'url': 'bundle:' + vfs.join(tmpbundlefile)} |
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197 bundle2.applybundle(repo, gen, tr, source='strip', |
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198 url='bundle:' + vfs.join(tmpbundlefile)) |
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199 else: |
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200 gen.apply(repo, 'strip', 'bundle:' + vfs.join(tmpbundlefile), |
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201 True) |
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202 if not repo.ui.verbose: |
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203 repo.ui.popbuffer() |
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204 f.close() |
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205 repo._phasecache.invalidate() |
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206 |
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207 for m in updatebm: |
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208 bm[m] = repo[newbmtarget].node() |
31626
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209 |
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210 with repo.lock(): |
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211 with repo.transaction('repair') as tr: |
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212 bm.recordchange(tr) |
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213 |
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214 # remove undo files |
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215 for undovfs, undofile in repo.undofiles(): |
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216 try: |
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217 undovfs.unlink(undofile) |
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218 except OSError as e: |
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219 if e.errno != errno.ENOENT: |
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220 ui.warn(_('error removing %s: %s\n') % |
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221 (undovfs.join(undofile), str(e))) |
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222 |
16705
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check-code: ignore naked excepts with a "re-raise" comment
Brodie Rao <brodie@sf.io>
parents:
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223 except: # re-raises |
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224 if backupfile: |
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225 ui.warn(_("strip failed, backup bundle stored in '%s'\n") |
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226 % vfs.join(backupfile)) |
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227 if tmpbundlefile: |
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228 ui.warn(_("strip failed, unrecovered changes stored in '%s'\n") |
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229 % vfs.join(tmpbundlefile)) |
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230 ui.warn(_("(fix the problem, then recover the changesets with " |
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231 "\"hg unbundle '%s'\")\n") % vfs.join(tmpbundlefile)) |
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232 raise |
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233 else: |
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234 if tmpbundlefile: |
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235 # Remove temporary bundle only if there were no exceptions |
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236 vfs.unlink(tmpbundlefile) |
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237 |
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238 repo.destroyed() |
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239 # return the backup file path (or None if 'backup' was False) so |
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240 # extensions can use it |
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241 return backupfile |
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242 |
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243 def rebuildfncache(ui, repo): |
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244 """Rebuilds the fncache file from repo history. |
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245 |
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246 Missing entries will be added. Extra entries will be removed. |
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247 """ |
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248 repo = repo.unfiltered() |
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249 |
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250 if 'fncache' not in repo.requirements: |
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251 ui.warn(_('(not rebuilding fncache because repository does not ' |
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252 'support fncache)\n')) |
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253 return |
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254 |
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255 with repo.lock(): |
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256 fnc = repo.store.fncache |
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257 # Trigger load of fncache. |
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258 if 'irrelevant' in fnc: |
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259 pass |
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260 |
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261 oldentries = set(fnc.entries) |
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262 newentries = set() |
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263 seenfiles = set() |
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264 |
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265 repolen = len(repo) |
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266 for rev in repo: |
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267 ui.progress(_('rebuilding'), rev, total=repolen, |
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268 unit=_('changesets')) |
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269 |
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270 ctx = repo[rev] |
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271 for f in ctx.files(): |
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272 # This is to minimize I/O. |
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273 if f in seenfiles: |
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274 continue |
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275 seenfiles.add(f) |
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276 |
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277 i = 'data/%s.i' % f |
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278 d = 'data/%s.d' % f |
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279 |
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280 if repo.store._exists(i): |
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281 newentries.add(i) |
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282 if repo.store._exists(d): |
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283 newentries.add(d) |
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284 |
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285 ui.progress(_('rebuilding'), None) |
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286 |
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287 if 'treemanifest' in repo.requirements: # safe but unnecessary otherwise |
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288 for dir in util.dirs(seenfiles): |
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289 i = 'meta/%s/00manifest.i' % dir |
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290 d = 'meta/%s/00manifest.d' % dir |
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291 |
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292 if repo.store._exists(i): |
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293 newentries.add(i) |
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294 if repo.store._exists(d): |
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295 newentries.add(d) |
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296 |
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297 addcount = len(newentries - oldentries) |
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298 removecount = len(oldentries - newentries) |
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299 for p in sorted(oldentries - newentries): |
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300 ui.write(_('removing %s\n') % p) |
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301 for p in sorted(newentries - oldentries): |
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302 ui.write(_('adding %s\n') % p) |
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303 |
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304 if addcount or removecount: |
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305 ui.write(_('%d items added, %d removed from fncache\n') % |
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306 (addcount, removecount)) |
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307 fnc.entries = newentries |
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308 fnc._dirty = True |
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309 |
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310 with repo.transaction('fncache') as tr: |
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311 fnc.write(tr) |
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312 else: |
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313 ui.write(_('fncache already up to date\n')) |
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314 |
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315 def stripbmrevset(repo, mark): |
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316 """ |
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317 The revset to strip when strip is called with -B mark |
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318 |
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319 Needs to live here so extensions can use it and wrap it even when strip is |
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320 not enabled or not present on a box. |
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321 """ |
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322 return repo.revs("ancestors(bookmark(%s)) - " |
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323 "ancestors(head() and not bookmark(%s)) - " |
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324 "ancestors(bookmark() and not bookmark(%s))", |
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325 mark, mark, mark) |
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326 |
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327 def deleteobsmarkers(obsstore, indices): |
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328 """Delete some obsmarkers from obsstore and return how many were deleted |
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329 |
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330 'indices' is a list of ints which are the indices |
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331 of the markers to be deleted. |
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332 |
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333 Every invocation of this function completely rewrites the obsstore file, |
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334 skipping the markers we want to be removed. The new temporary file is |
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335 created, remaining markers are written there and on .close() this file |
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336 gets atomically renamed to obsstore, thus guaranteeing consistency.""" |
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337 if not indices: |
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338 # we don't want to rewrite the obsstore with the same content |
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339 return |
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340 |
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parents:
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341 left = [] |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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342 current = obsstore._all |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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343 n = 0 |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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344 for i, m in enumerate(current): |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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345 if i in indices: |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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346 n += 1 |
445a25bb70be
obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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347 continue |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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348 left.append(m) |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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349 |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
28666
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350 newobsstorefile = obsstore.svfs('obsstore', 'w', atomictemp=True) |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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351 for bytes in obsolete.encodemarkers(left, True, obsstore._version): |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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352 newobsstorefile.write(bytes) |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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353 newobsstorefile.close() |
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obsstore: move delete function from obsstore class to repair module
Kostia Balytskyi <ikostia@fb.com>
parents:
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354 return n |