Mercurial > hg
annotate mercurial/repair.py @ 24066:afdf5f6ab37a
pager: set an attribute on ui indicating that a pager is active
A subsequent patch will teach the color extension to do different things
depending on whether a pager is active. This patch leaves a breadcrumb
on the ui instance to allow it do that that.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Fri, 06 Feb 2015 12:07:56 -0800 |
parents | 33d1b81c6ef0 |
children | fbc4d550a6ab |
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 mercurial import changegroup, exchange, util, bundle2 |
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10 from mercurial.node import short, hex |
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11 from mercurial.i18n import _ |
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12 import errno |
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13 |
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14 def _bundle(repo, bases, heads, node, suffix, compress=True): |
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15 """create a bundle with the specified revisions as a backup""" |
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16 usebundle2 = (repo.ui.config('experimental', 'bundle2-exp') and |
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17 repo.ui.config('experimental', 'strip-bundle2-version')) |
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18 if usebundle2: |
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19 cgversion = repo.ui.config('experimental', 'strip-bundle2-version') |
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20 if cgversion not in changegroup.packermap: |
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21 repo.ui.warn(_('unknown strip-bundle2-version value %r; ' + |
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22 'should be one of %r\n') % |
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23 (cgversion, sorted(changegroup.packermap.keys()),)) |
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24 cgversion = '01' |
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25 usebundle2 = False |
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26 else: |
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27 cgversion = '01' |
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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 hexbases = (hex(n) for n in bases) |
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38 hexheads = (hex(n) for n in heads) |
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39 allcommits = repo.set('%ls::%ls', hexbases, hexheads) |
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40 allhashes = sorted(c.hex() for c in allcommits) |
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41 totalhash = util.sha1(''.join(allhashes)).hexdigest() |
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42 name = "%s/%s-%s-%s.hg" % (backupdir, short(node), totalhash[:8], suffix) |
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43 |
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44 if usebundle2: |
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45 bundletype = "HG2Y" |
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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 |
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52 def _collectfiles(repo, striprev): |
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53 """find out the filelogs affected by the strip""" |
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54 files = set() |
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55 |
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56 for x in xrange(striprev, len(repo)): |
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57 files.update(repo[x].files()) |
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58 |
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59 return sorted(files) |
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60 |
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61 def _collectbrokencsets(repo, files, striprev): |
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62 """return the changesets which will be broken by the truncation""" |
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63 s = set() |
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64 def collectone(revlog): |
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65 _, brokenset = revlog.getstrippoint(striprev) |
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66 s.update([revlog.linkrev(r) for r in brokenset]) |
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67 |
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68 collectone(repo.manifest) |
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69 for fname in files: |
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70 collectone(repo.file(fname)) |
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71 |
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72 return s |
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73 |
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74 def strip(ui, repo, nodelist, backup=True, topic='backup'): |
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75 |
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76 # Simple way to maintain backwards compatibility for this |
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77 # argument. |
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78 if backup in ['none', 'strip']: |
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79 backup = False |
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80 |
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81 repo = repo.unfiltered() |
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82 repo.destroying() |
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83 |
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84 cl = repo.changelog |
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85 # TODO handle undo of merge sets |
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86 if isinstance(nodelist, str): |
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87 nodelist = [nodelist] |
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88 striplist = [cl.rev(node) for node in nodelist] |
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89 striprev = min(striplist) |
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90 |
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91 # Some revisions with rev > striprev may not be descendants of striprev. |
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92 # We have to find these revisions and put them in a bundle, so that |
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93 # we can restore them after the truncations. |
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94 # To create the bundle we use repo.changegroupsubset which requires |
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95 # the list of heads and bases of the set of interesting revisions. |
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96 # (head = revision in the set that has no descendant in the set; |
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97 # base = revision in the set that has no ancestor in the set) |
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98 tostrip = set(striplist) |
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99 for rev in striplist: |
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100 for desc in cl.descendants([rev]): |
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101 tostrip.add(desc) |
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102 |
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103 files = _collectfiles(repo, striprev) |
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104 saverevs = _collectbrokencsets(repo, files, striprev) |
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105 |
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106 # compute heads |
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107 saveheads = set(saverevs) |
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108 for r in xrange(striprev + 1, len(cl)): |
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109 if r not in tostrip: |
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110 saverevs.add(r) |
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111 saveheads.difference_update(cl.parentrevs(r)) |
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112 saveheads.add(r) |
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113 saveheads = [cl.node(r) for r in saveheads] |
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114 |
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115 # compute base nodes |
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116 if saverevs: |
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117 descendants = set(cl.descendants(saverevs)) |
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118 saverevs.difference_update(descendants) |
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119 savebases = [cl.node(r) for r in saverevs] |
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120 stripbases = [cl.node(r) for r in tostrip] |
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121 |
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122 # For a set s, max(parents(s) - s) is the same as max(heads(::s - s)), but |
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123 # is much faster |
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124 newbmtarget = repo.revs('max(parents(%ld) - (%ld))', tostrip, tostrip) |
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125 if newbmtarget: |
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126 newbmtarget = repo[newbmtarget.first()].node() |
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127 else: |
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128 newbmtarget = '.' |
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129 |
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130 bm = repo._bookmarks |
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131 updatebm = [] |
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132 for m in bm: |
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133 rev = repo[bm[m]].rev() |
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134 if rev in tostrip: |
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135 updatebm.append(m) |
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136 |
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137 # create a changegroup for all the branches we need to keep |
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138 backupfile = None |
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139 vfs = repo.vfs |
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140 if backup: |
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141 backupfile = _bundle(repo, stripbases, cl.heads(), node, topic) |
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142 repo.ui.status(_("saved backup bundle to %s\n") % |
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143 vfs.join(backupfile)) |
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144 repo.ui.log("backupbundle", "saved backup bundle to %s\n", |
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145 vfs.join(backupfile)) |
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146 if saveheads or savebases: |
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147 # do not compress partial bundle if we remove it from disk later |
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148 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp', |
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149 compress=False) |
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150 |
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151 mfst = repo.manifest |
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152 |
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153 tr = repo.transaction("strip") |
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154 offset = len(tr.entries) |
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155 |
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156 try: |
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157 tr.startgroup() |
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158 cl.strip(striprev, tr) |
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159 mfst.strip(striprev, tr) |
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160 for fn in files: |
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161 repo.file(fn).strip(striprev, tr) |
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162 tr.endgroup() |
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163 |
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164 try: |
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165 for i in xrange(offset, len(tr.entries)): |
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166 file, troffset, ignore = tr.entries[i] |
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167 repo.svfs(file, 'a').truncate(troffset) |
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168 if troffset == 0: |
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169 repo.store.markremoved(file) |
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170 tr.close() |
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171 except: # re-raises |
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172 tr.abort() |
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173 raise |
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174 |
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175 if saveheads or savebases: |
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176 ui.note(_("adding branch\n")) |
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177 f = vfs.open(chgrpfile, "rb") |
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178 gen = exchange.readbundle(ui, f, chgrpfile, vfs) |
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179 if not repo.ui.verbose: |
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180 # silence internal shuffling chatter |
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181 repo.ui.pushbuffer() |
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182 if isinstance(gen, bundle2.unbundle20): |
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183 tr = repo.transaction('strip') |
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184 try: |
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185 bundle2.processbundle(repo, gen, lambda: tr) |
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186 tr.close() |
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187 finally: |
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188 tr.release() |
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189 else: |
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190 changegroup.addchangegroup(repo, gen, 'strip', |
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191 'bundle:' + vfs.join(chgrpfile), |
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192 True) |
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193 if not repo.ui.verbose: |
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194 repo.ui.popbuffer() |
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195 f.close() |
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196 |
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197 # remove undo files |
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198 for undovfs, undofile in repo.undofiles(): |
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199 try: |
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200 undovfs.unlink(undofile) |
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201 except OSError, e: |
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202 if e.errno != errno.ENOENT: |
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203 ui.warn(_('error removing %s: %s\n') % |
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204 (undovfs.join(undofile), str(e))) |
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205 |
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206 for m in updatebm: |
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207 bm[m] = repo[newbmtarget].node() |
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208 bm.write() |
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209 except: # re-raises |
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210 if backupfile: |
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211 ui.warn(_("strip failed, full bundle stored in '%s'\n") |
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212 % vfs.join(backupfile)) |
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213 elif saveheads: |
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214 ui.warn(_("strip failed, partial bundle stored in '%s'\n") |
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215 % vfs.join(chgrpfile)) |
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216 raise |
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217 else: |
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218 if saveheads or savebases: |
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219 # Remove partial backup only if there were no exceptions |
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220 vfs.unlink(chgrpfile) |
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221 |
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222 repo.destroyed() |