Mercurial > hg
annotate mercurial/bundlerepo.py @ 2049:f70952384ae7
Make completion for debugindex<tab><tab> show debugindexdot, too.
The special handling for commands with names that are substrings of other
commands (e.g. with st and strip) wasn't used with debug commands before.
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Wed, 05 Apr 2006 19:07:50 +0200 |
parents | 736b6c96bbbc |
children | 01ee43dda681 |
rev | line source |
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1 """ |
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2 bundlerepo.py - repository class for viewing uncompressed bundles |
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3 |
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4 This provides a read-only repository interface to bundles as if |
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5 they were part of the actual repository. |
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6 |
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7 Copyright 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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8 |
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9 This software may be used and distributed according to the terms |
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10 of the GNU General Public License, incorporated herein by reference. |
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11 """ |
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12 |
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13 from node import * |
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14 from i18n import gettext as _ |
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15 from demandload import demandload |
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16 demandload(globals(), "changegroup util os struct") |
1942
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17 |
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18 import localrepo, changelog, manifest, filelog, revlog |
1942
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19 |
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20 class bundlerevlog(revlog.revlog): |
1942
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21 def __init__(self, opener, indexfile, datafile, bundlefile, |
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22 linkmapper=None): |
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23 # How it works: |
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24 # to retrieve a revision, we need to know the offset of |
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25 # the revision in the bundlefile (an opened file). |
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26 # |
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27 # We store this offset in the index (start), to differentiate a |
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28 # rev in the bundle and from a rev in the revlog, we check |
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29 # len(index[r]). If the tuple is bigger than 7, it is a bundle |
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30 # (it is bigger since we store the node to which the delta is) |
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31 # |
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32 revlog.revlog.__init__(self, opener, indexfile, datafile) |
1942
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33 self.bundlefile = bundlefile |
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34 def chunkpositer(): |
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35 for chunk in changegroup.chunkiter(bundlefile): |
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36 pos = bundlefile.tell() |
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37 yield chunk, pos - len(chunk) |
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38 n = self.count() |
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39 prev = None |
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40 for chunk, start in chunkpositer(): |
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41 size = len(chunk) |
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42 if size < 80: |
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43 raise util.Abort("invalid changegroup") |
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44 start += 80 |
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45 size -= 80 |
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46 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
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47 if node in self.nodemap: |
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48 prev = node |
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49 continue |
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50 for p in (p1, p2): |
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51 if not p in self.nodemap: |
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52 raise RevlogError(_("unknown parent %s") % short(p1)) |
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53 if linkmapper is None: |
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54 link = n |
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55 else: |
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56 link = linkmapper(cs) |
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57 |
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58 if not prev: |
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59 prev = p1 |
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60 # start, size, base is not used, link, p1, p2, delta ref |
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61 e = (start, size, None, link, p1, p2, node, prev) |
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62 self.index.append(e) |
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63 self.nodemap[node] = n |
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64 prev = node |
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65 n += 1 |
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66 |
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67 def bundle(self, rev): |
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68 """is rev from the bundle""" |
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69 if rev < 0: |
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70 return False |
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71 return len(self.index[rev]) > 7 |
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72 def bundlebase(self, rev): return self.index[rev][7] |
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73 def chunk(self, rev): |
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74 # Warning: in case of bundle, the diff is against bundlebase, |
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75 # not against rev - 1 |
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76 # XXX: could use some caching |
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77 if not self.bundle(rev): |
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78 return revlog.revlog.chunk(self, rev) |
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79 self.bundlefile.seek(self.start(rev)) |
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80 return self.bundlefile.read(self.length(rev)) |
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81 |
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82 def revdiff(self, rev1, rev2): |
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83 """return or calculate a delta between two revisions""" |
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84 if self.bundle(rev1) and self.bundle(rev2): |
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85 # hot path for bundle |
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86 revb = self.rev(self.bundlebase(rev2)) |
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87 if revb == rev1: |
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88 return self.chunk(rev2) |
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89 elif not self.bundle(rev1) and not self.bundle(rev2): |
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90 return revlog.revlog.chunk(self, rev1, rev2) |
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91 |
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92 return self.diff(self.revision(self.node(rev1)), |
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93 self.revision(self.node(rev2))) |
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94 |
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95 def revision(self, node): |
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96 """return an uncompressed revision of a given""" |
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97 if node == nullid: return "" |
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98 |
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99 text = None |
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100 chain = [] |
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101 iter_node = node |
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102 rev = self.rev(iter_node) |
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103 # reconstruct the revision if it is from a changegroup |
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104 while self.bundle(rev): |
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105 if self.cache and self.cache[0] == iter_node: |
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106 text = self.cache[2] |
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107 break |
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108 chain.append(rev) |
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109 iter_node = self.bundlebase(rev) |
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110 rev = self.rev(iter_node) |
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111 if text is None: |
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112 text = revlog.revlog.revision(self, iter_node) |
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113 |
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114 while chain: |
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115 delta = self.chunk(chain.pop()) |
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116 text = self.patches(text, [delta]) |
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117 |
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118 p1, p2 = self.parents(node) |
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119 if node != revlog.hash(text, p1, p2): |
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120 raise RevlogError(_("integrity check failed on %s:%d") |
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121 % (self.datafile, self.rev(node))) |
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122 |
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123 self.cache = (node, rev, text) |
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124 return text |
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125 |
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126 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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127 raise NotImplementedError |
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128 def addgroup(self, revs, linkmapper, transaction, unique=0): |
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129 raise NotImplementedError |
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130 def strip(self, rev, minlink): |
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131 raise NotImplementedError |
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132 def checksize(self): |
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133 raise NotImplementedError |
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134 |
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135 class bundlechangelog(bundlerevlog, changelog.changelog): |
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136 def __init__(self, opener, bundlefile): |
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137 changelog.changelog.__init__(self, opener) |
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138 bundlerevlog.__init__(self, opener, "00changelog.i", "00changelog.d", |
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139 bundlefile) |
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140 |
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141 class bundlemanifest(bundlerevlog, manifest.manifest): |
1942
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142 def __init__(self, opener, bundlefile, linkmapper): |
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143 manifest.manifest.__init__(self, opener) |
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144 bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, |
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145 bundlefile, linkmapper) |
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146 |
1946
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147 class bundlefilelog(bundlerevlog, filelog.filelog): |
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148 def __init__(self, opener, path, bundlefile, linkmapper): |
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149 filelog.filelog.__init__(self, opener, path) |
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150 bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, |
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151 bundlefile, linkmapper) |
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152 |
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153 class bundlerepository(localrepo.localrepository): |
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154 def __init__(self, ui, path, bundlename): |
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155 localrepo.localrepository.__init__(self, ui, path) |
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156 f = open(bundlename, "rb") |
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157 s = os.fstat(f.fileno()) |
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158 self.bundlefile = f |
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159 header = self.bundlefile.read(6) |
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160 if not header.startswith("HG"): |
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161 raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename) |
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162 elif not header.startswith("HG10"): |
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163 raise util.Abort(_("%s: unknown bundle version") % bundlename) |
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164 elif header == "HG10BZ": |
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165 raise util.Abort(_("%s: compressed bundle not supported") |
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166 % bundlename) |
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167 elif header == "HG10UN": |
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168 # uncompressed bundle supported |
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169 pass |
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170 else: |
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171 raise util.Abort(_("%s: unknown bundle compression type") |
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172 % bundlename) |
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173 self.changelog = bundlechangelog(self.opener, self.bundlefile) |
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174 self.manifest = bundlemanifest(self.opener, self.bundlefile, |
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175 self.changelog.rev) |
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176 # dict with the mapping 'filename' -> position in the bundle |
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177 self.bundlefilespos = {} |
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178 while 1: |
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179 f = changegroup.getchunk(self.bundlefile) |
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180 if not f: |
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181 break |
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182 self.bundlefilespos[f] = self.bundlefile.tell() |
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183 for c in changegroup.chunkiter(self.bundlefile): |
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184 pass |
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185 |
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186 def dev(self): |
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187 return -1 |
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188 |
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189 def file(self, f): |
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190 if f[0] == '/': |
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191 f = f[1:] |
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192 if f in self.bundlefilespos: |
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193 self.bundlefile.seek(self.bundlefilespos[f]) |
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194 return bundlefilelog(self.opener, f, self.bundlefile, |
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195 self.changelog.rev) |
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196 else: |
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197 return filelog.filelog(self.opener, f) |
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198 |
1971
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199 def close(self): |
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200 """Close assigned bundle file immediately.""" |
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201 self.bundlefile.close() |