Mercurial > public > mercurial-scm > hg
annotate mercurial/repair.py @ 26534:e4f27fb65da7
merge: drop special parent assignment in the obsolete case
We can safely drop this because the very same assignment is enforcement later in
the function. Dropping it will make it simpler to extract the default
destination logic in its own function.
| author | Pierre-Yves David <pierre-yves.david@fb.com> |
|---|---|
| date | Mon, 05 Oct 2015 01:47:33 -0700 |
| parents | eb21b6679dc6 |
| children | 56b2bcea2529 |
| rev | line source |
|---|---|
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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 |
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13 from .i18n import _ |
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14 from .node import short |
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15 from . import ( |
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16 bundle2, |
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17 changegroup, |
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18 exchange, |
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19 util, |
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20 ) |
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21 |
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22 def _bundle(repo, bases, heads, node, suffix, compress=True): |
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23 """create a bundle with the specified revisions as a backup""" |
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24 cgversion = '01' |
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25 if 'generaldelta' in repo.requirements: |
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26 cgversion = '02' |
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27 |
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28 cg = changegroup.changegroupsubset(repo, bases, heads, 'strip', |
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29 version=cgversion) |
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30 backupdir = "strip-backup" |
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31 vfs = repo.vfs |
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32 if not vfs.isdir(backupdir): |
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33 vfs.mkdir(backupdir) |
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34 |
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35 # Include a hash of all the nodes in the filename for uniqueness |
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36 allcommits = repo.set('%ln::%ln', bases, heads) |
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37 allhashes = sorted(c.hex() for c in allcommits) |
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38 totalhash = util.sha1(''.join(allhashes)).hexdigest() |
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39 name = "%s/%s-%s-%s.hg" % (backupdir, short(node), totalhash[:8], suffix) |
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40 |
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41 comp = None |
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42 if cgversion != '01': |
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43 bundletype = "HG20" |
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44 if compress: |
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45 comp = 'BZ' |
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46 elif compress: |
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47 bundletype = "HG10BZ" |
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48 else: |
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49 bundletype = "HG10UN" |
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50 return changegroup.writebundle(repo.ui, cg, name, bundletype, vfs, |
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51 compression=comp) |
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52 |
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53 def _collectfiles(repo, striprev): |
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54 """find out the filelogs affected by the strip""" |
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55 files = set() |
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56 |
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57 for x in xrange(striprev, len(repo)): |
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58 files.update(repo[x].files()) |
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59 |
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60 return sorted(files) |
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61 |
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62 def _collectbrokencsets(repo, files, striprev): |
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63 """return the changesets which will be broken by the truncation""" |
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64 s = set() |
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65 def collectone(revlog): |
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66 _, brokenset = revlog.getstrippoint(striprev) |
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67 s.update([revlog.linkrev(r) for r in brokenset]) |
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68 |
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69 collectone(repo.manifest) |
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70 for fname in files: |
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71 collectone(repo.file(fname)) |
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72 |
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73 return s |
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74 |
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75 def strip(ui, repo, nodelist, backup=True, topic='backup'): |
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76 |
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77 # Simple way to maintain backwards compatibility for this |
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78 # argument. |
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79 if backup in ['none', 'strip']: |
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80 backup = False |
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81 |
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82 repo = repo.unfiltered() |
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83 repo.destroying() |
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84 |
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85 cl = repo.changelog |
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86 # TODO handle undo of merge sets |
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87 if isinstance(nodelist, str): |
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88 nodelist = [nodelist] |
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89 striplist = [cl.rev(node) for node in nodelist] |
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90 striprev = min(striplist) |
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91 |
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92 # Some revisions with rev > striprev may not be descendants of striprev. |
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93 # We have to find these revisions and put them in a bundle, so that |
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94 # we can restore them after the truncations. |
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95 # To create the bundle we use repo.changegroupsubset which requires |
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96 # the list of heads and bases of the set of interesting revisions. |
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97 # (head = revision in the set that has no descendant in the set; |
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98 # base = revision in the set that has no ancestor in the set) |
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99 tostrip = set(striplist) |
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100 for rev in striplist: |
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101 for desc in cl.descendants([rev]): |
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102 tostrip.add(desc) |
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103 |
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104 files = _collectfiles(repo, striprev) |
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105 saverevs = _collectbrokencsets(repo, files, striprev) |
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106 |
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107 # compute heads |
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108 saveheads = set(saverevs) |
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109 for r in xrange(striprev + 1, len(cl)): |
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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 if saveheads or savebases: |
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149 # do not compress partial bundle if we remove it from disk later |
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150 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp', |
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151 compress=False) |
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152 |
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153 mfst = repo.manifest |
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154 |
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155 curtr = repo.currenttransaction() |
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156 if curtr is not None: |
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157 del curtr # avoid carrying reference to transaction for nothing |
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158 msg = _('programming error: cannot strip from inside a transaction') |
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159 raise util.Abort(msg, hint=_('contact your extension maintainer')) |
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160 |
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161 tr = repo.transaction("strip") |
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162 offset = len(tr.entries) |
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163 |
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164 try: |
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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 for fn in files: |
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169 repo.file(fn).strip(striprev, tr) |
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170 tr.endgroup() |
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171 |
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172 try: |
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173 for i in xrange(offset, len(tr.entries)): |
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174 file, troffset, ignore = tr.entries[i] |
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175 repo.svfs(file, 'a').truncate(troffset) |
|
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176 if troffset == 0: |
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177 repo.store.markremoved(file) |
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178 tr.close() |
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179 finally: |
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180 tr.release() |
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181 |
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182 if saveheads or savebases: |
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183 ui.note(_("adding branch\n")) |
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184 f = vfs.open(chgrpfile, "rb") |
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185 gen = exchange.readbundle(ui, f, chgrpfile, vfs) |
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186 if not repo.ui.verbose: |
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187 # silence internal shuffling chatter |
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188 repo.ui.pushbuffer() |
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189 if isinstance(gen, bundle2.unbundle20): |
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190 tr = repo.transaction('strip') |
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191 tr.hookargs = {'source': 'strip', |
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192 'url': 'bundle:' + vfs.join(chgrpfile)} |
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193 try: |
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194 bundle2.processbundle(repo, gen, lambda: tr) |
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195 tr.close() |
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196 finally: |
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197 tr.release() |
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198 else: |
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199 changegroup.addchangegroup(repo, gen, 'strip', |
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200 'bundle:' + vfs.join(chgrpfile), |
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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 |
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206 # remove undo files |
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207 for undovfs, undofile in repo.undofiles(): |
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208 try: |
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209 undovfs.unlink(undofile) |
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210 except OSError as e: |
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211 if e.errno != errno.ENOENT: |
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212 ui.warn(_('error removing %s: %s\n') % |
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213 (undovfs.join(undofile), str(e))) |
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214 |
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215 for m in updatebm: |
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216 bm[m] = repo[newbmtarget].node() |
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217 bm.write() |
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218 except: # re-raises |
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219 if backupfile: |
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220 ui.warn(_("strip failed, full bundle stored in '%s'\n") |
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221 % vfs.join(backupfile)) |
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222 elif saveheads: |
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223 ui.warn(_("strip failed, partial bundle stored in '%s'\n") |
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224 % vfs.join(chgrpfile)) |
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225 raise |
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226 else: |
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227 if saveheads or savebases: |
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228 # Remove partial backup only if there were no exceptions |
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229 vfs.unlink(chgrpfile) |
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230 |
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231 repo.destroyed() |
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232 |
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233 def rebuildfncache(ui, repo): |
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234 """Rebuilds the fncache file from repo history. |
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235 |
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236 Missing entries will be added. Extra entries will be removed. |
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237 """ |
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238 repo = repo.unfiltered() |
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239 |
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240 if 'fncache' not in repo.requirements: |
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241 ui.warn(_('(not rebuilding fncache because repository does not ' |
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242 'support fncache)\n')) |
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243 return |
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244 |
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245 lock = repo.lock() |
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246 try: |
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247 fnc = repo.store.fncache |
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248 # Trigger load of fncache. |
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249 if 'irrelevant' in fnc: |
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250 pass |
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251 |
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252 oldentries = set(fnc.entries) |
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253 newentries = set() |
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254 seenfiles = set() |
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255 |
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256 repolen = len(repo) |
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257 for rev in repo: |
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258 ui.progress(_('changeset'), rev, total=repolen) |
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259 |
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260 ctx = repo[rev] |
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261 for f in ctx.files(): |
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262 # This is to minimize I/O. |
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263 if f in seenfiles: |
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264 continue |
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265 seenfiles.add(f) |
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266 |
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267 i = 'data/%s.i' % f |
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268 d = 'data/%s.d' % f |
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269 |
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270 if repo.store._exists(i): |
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271 newentries.add(i) |
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272 if repo.store._exists(d): |
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273 newentries.add(d) |
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274 |
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275 ui.progress(_('changeset'), None) |
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276 |
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277 addcount = len(newentries - oldentries) |
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278 removecount = len(oldentries - newentries) |
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279 for p in sorted(oldentries - newentries): |
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280 ui.write(_('removing %s\n') % p) |
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281 for p in sorted(newentries - oldentries): |
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282 ui.write(_('adding %s\n') % p) |
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283 |
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284 if addcount or removecount: |
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285 ui.write(_('%d items added, %d removed from fncache\n') % |
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286 (addcount, removecount)) |
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287 fnc.entries = newentries |
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288 fnc._dirty = True |
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289 |
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290 tr = repo.transaction('fncache') |
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291 try: |
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292 fnc.write(tr) |
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293 tr.close() |
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294 finally: |
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295 tr.release() |
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296 else: |
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297 ui.write(_('fncache already up to date\n')) |
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298 finally: |
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299 lock.release() |
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300 |