Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/bundlerepo.py @ 1974:0d54675cd566
Delete bundle file of hg incoming in case of errors, preserve existing files.
Let write_bundle always create the bundle file, check if target doesn't exist
and delete it in case of errors.
This way incoming only has to delete the bundle file if it was meant to
be a temporary file.
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Sat, 18 Mar 2006 14:36:45 +0100 |
parents | 915b81a35e46 |
children | dfb796786337 |
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(), "util os struct") |
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17 |
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18 import localrepo, changelog, manifest, filelog, revlog |
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19 |
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20 def getchunk(source): |
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21 """get a chunk from a group""" |
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22 d = source.read(4) |
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23 if not d: |
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24 return "" |
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25 l = struct.unpack(">l", d)[0] |
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26 if l <= 4: |
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27 return "" |
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28 d = source.read(l - 4) |
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29 if len(d) < l - 4: |
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30 raise util.Abort(_("premature EOF reading chunk" |
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31 " (got %d bytes, expected %d)") |
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32 % (len(d), l - 4)) |
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33 return d |
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34 |
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35 class bundlerevlog(revlog.revlog): |
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36 def __init__(self, opener, indexfile, datafile, bundlefile, |
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37 linkmapper=None): |
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38 # How it works: |
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39 # to retrieve a revision, we need to know the offset of |
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40 # the revision in the bundlefile (an opened file). |
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41 # |
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42 # We store this offset in the index (start), to differentiate a |
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43 # rev in the bundle and from a rev in the revlog, we check |
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44 # len(index[r]). If the tuple is bigger than 7, it is a bundle |
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45 # (it is bigger since we store the node to which the delta is) |
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46 # |
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47 revlog.revlog.__init__(self, opener, indexfile, datafile) |
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48 self.bundlefile = bundlefile |
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49 def genchunk(): |
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50 while 1: |
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51 pos = bundlefile.tell() |
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52 chunk = getchunk(bundlefile) |
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53 if not chunk: |
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54 break |
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55 yield chunk, pos + 4 # XXX struct.calcsize(">l") == 4 |
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56 n = self.count() |
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57 prev = None |
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58 for chunk, start in genchunk(): |
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59 size = len(chunk) |
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60 if size < 80: |
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61 raise util.Abort("invalid changegroup") |
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62 start += 80 |
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63 size -= 80 |
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64 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
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65 if node in self.nodemap: |
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66 prev = node |
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67 continue |
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68 for p in (p1, p2): |
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69 if not p in self.nodemap: |
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70 raise RevlogError(_("unknown parent %s") % short(p1)) |
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71 if linkmapper is None: |
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72 link = n |
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73 else: |
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74 link = linkmapper(cs) |
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75 |
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76 if not prev: |
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77 prev = p1 |
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78 # start, size, base is not used, link, p1, p2, delta ref |
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79 e = (start, size, None, link, p1, p2, node, prev) |
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80 self.index.append(e) |
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81 self.nodemap[node] = n |
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82 prev = node |
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83 n += 1 |
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84 |
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85 def bundle(self, rev): |
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86 """is rev from the bundle""" |
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87 if rev < 0: |
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88 return False |
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89 return len(self.index[rev]) > 7 |
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90 def bundlebase(self, rev): return self.index[rev][7] |
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91 def chunk(self, rev): |
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92 # Warning: in case of bundle, the diff is against bundlebase, |
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93 # not against rev - 1 |
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94 # XXX: could use some caching |
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95 if not self.bundle(rev): |
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96 return revlog.revlog.chunk(self, rev) |
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97 self.bundlefile.seek(self.start(rev)) |
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98 return self.bundlefile.read(self.length(rev)) |
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99 |
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100 def revdiff(self, rev1, rev2): |
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101 """return or calculate a delta between two revisions""" |
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102 if self.bundle(rev1) and self.bundle(rev2): |
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103 # hot path for bundle |
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104 revb = self.rev(self.bundlebase(rev2)) |
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105 if revb == rev1: |
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106 return self.chunk(rev2) |
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107 elif not self.bundle(rev1) and not self.bundle(rev2): |
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108 return revlog.revlog.chunk(self, rev1, rev2) |
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109 |
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110 return self.diff(self.revision(self.node(rev1)), |
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111 self.revision(self.node(rev2))) |
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112 |
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113 def revision(self, node): |
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114 """return an uncompressed revision of a given""" |
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115 if node == nullid: return "" |
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116 |
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117 text = None |
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118 chain = [] |
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119 iter_node = node |
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120 rev = self.rev(iter_node) |
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121 # reconstruct the revision if it is from a changegroup |
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122 while self.bundle(rev): |
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123 if self.cache and self.cache[0] == iter_node: |
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124 text = self.cache[2] |
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125 break |
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126 chain.append(rev) |
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127 iter_node = self.bundlebase(rev) |
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128 rev = self.rev(iter_node) |
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129 if text is None: |
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130 text = revlog.revlog.revision(self, iter_node) |
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131 |
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132 while chain: |
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133 delta = self.chunk(chain.pop()) |
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134 text = self.patches(text, [delta]) |
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135 |
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136 p1, p2 = self.parents(node) |
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137 if node != revlog.hash(text, p1, p2): |
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138 raise RevlogError(_("integrity check failed on %s:%d") |
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139 % (self.datafile, self.rev(node))) |
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140 |
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141 self.cache = (node, rev, text) |
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142 return text |
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143 |
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144 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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145 raise NotImplementedError |
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146 def addgroup(self, revs, linkmapper, transaction, unique=0): |
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147 raise NotImplementedError |
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148 def strip(self, rev, minlink): |
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149 raise NotImplementedError |
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150 def checksize(self): |
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151 raise NotImplementedError |
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152 |
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153 class bundlechangelog(bundlerevlog, changelog.changelog): |
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154 def __init__(self, opener, bundlefile): |
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155 changelog.changelog.__init__(self, opener) |
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156 bundlerevlog.__init__(self, opener, "00changelog.i", "00changelog.d", |
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157 bundlefile) |
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158 |
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159 class bundlemanifest(bundlerevlog, manifest.manifest): |
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160 def __init__(self, opener, bundlefile, linkmapper): |
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161 manifest.manifest.__init__(self, opener) |
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162 bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, |
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163 bundlefile, linkmapper) |
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164 |
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165 class bundlefilelog(bundlerevlog, filelog.filelog): |
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166 def __init__(self, opener, path, bundlefile, linkmapper): |
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167 filelog.filelog.__init__(self, opener, path) |
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168 bundlerevlog.__init__(self, opener, self.indexfile, self.datafile, |
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169 bundlefile, linkmapper) |
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170 |
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171 class bundlerepository(localrepo.localrepository): |
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172 def __init__(self, ui, path, bundlename): |
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173 localrepo.localrepository.__init__(self, ui, path) |
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174 f = open(bundlename, "rb") |
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175 s = os.fstat(f.fileno()) |
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176 self.bundlefile = f |
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177 header = self.bundlefile.read(4) |
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178 if header == "HG10": |
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179 raise util.Abort(_("%s: compressed bundle not supported") |
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180 % bundlename) |
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181 elif header != "HG11": |
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182 raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename) |
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183 self.changelog = bundlechangelog(self.opener, self.bundlefile) |
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184 self.manifest = bundlemanifest(self.opener, self.bundlefile, |
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185 self.changelog.rev) |
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186 # dict with the mapping 'filename' -> position in the bundle |
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187 self.bundlefilespos = {} |
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188 while 1: |
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189 f = getchunk(self.bundlefile) |
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190 if not f: |
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191 break |
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192 self.bundlefilespos[f] = self.bundlefile.tell() |
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193 while getchunk(self.bundlefile): |
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194 pass |
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195 |
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196 def dev(self): |
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197 return -1 |
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198 |
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199 def file(self, f): |
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200 if f[0] == '/': |
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201 f = f[1:] |
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202 if f in self.bundlefilespos: |
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff
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203 self.bundlefile.seek(self.bundlefilespos[f]) |
9da45de3118d
add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff
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204 return bundlefilelog(self.opener, f, self.bundlefile, |
9da45de3118d
add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff
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205 self.changelog.rev) |
9da45de3118d
add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff
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206 else: |
1946
9fee186f7f0d
bundlerepo: remove relative import, fix a comment
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1942
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207 return filelog.filelog(self.opener, f) |
1942
9da45de3118d
add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
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208 |
1971
915b81a35e46
imported patch /home/thomas/fix-incoming-abortion4.patch
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1946
diff
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209 def close(self): |
915b81a35e46
imported patch /home/thomas/fix-incoming-abortion4.patch
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1946
diff
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210 """Close assigned bundle file immediately.""" |
915b81a35e46
imported patch /home/thomas/fix-incoming-abortion4.patch
Thomas Arendsen Hein <thomas@intevation.de>
parents:
1946
diff
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211 self.bundlefile.close() |