Mercurial > hg > mercurial-crew-with-dirclash
annotate mercurial/bundlerepo.py @ 4661:a7e9b6b1adeb
Backed out changeset cfa477946181824f4c769580ebf59710090ba08a
Only printenv was changed, not the actual execution of hooks.
And not setting an empty value might cause problems on platforms
which can't always remove variables from the environment.
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Thu, 21 Jun 2007 10:00:59 +0200 |
parents | 63b9d2deed48 |
children | e017d3a82e1d |
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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, 2007 Benoit Boissinot <bboissin@gmail.com> |
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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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15 import changegroup, util, os, struct, bz2, tempfile |
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16 |
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17 import localrepo, changelog, manifest, filelog, revlog |
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18 |
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19 class bundlerevlog(revlog.revlog): |
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20 def __init__(self, opener, indexfile, bundlefile, |
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21 linkmapper=None): |
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22 # How it works: |
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23 # to retrieve a revision, we need to know the offset of |
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24 # the revision in the bundlefile (an opened file). |
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25 # |
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26 # We store this offset in the index (start), to differentiate a |
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27 # rev in the bundle and from a rev in the revlog, we check |
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28 # len(index[r]). If the tuple is bigger than 7, it is a bundle |
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29 # (it is bigger since we store the node to which the delta is) |
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30 # |
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31 revlog.revlog.__init__(self, opener, indexfile) |
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32 self.bundlefile = bundlefile |
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33 self.basemap = {} |
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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 revlog.LookupError(_("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 if self.version == revlog.REVLOGV0: |
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62 e = (start, size, None, link, p1, p2, node) |
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63 else: |
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64 e = (self.offset_type(start, 0), size, -1, None, link, |
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65 self.rev(p1), self.rev(p2), node) |
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66 self.basemap[n] = prev |
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67 self.index.append(e) |
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68 self.nodemap[node] = n |
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69 prev = node |
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70 n += 1 |
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71 |
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72 def bundle(self, rev): |
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73 """is rev from the bundle""" |
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74 if rev < 0: |
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75 return False |
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76 return rev in self.basemap |
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77 def bundlebase(self, rev): return self.basemap[rev] |
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78 def chunk(self, rev, df=None, cachelen=4096): |
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79 # Warning: in case of bundle, the diff is against bundlebase, |
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80 # not against rev - 1 |
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81 # XXX: could use some caching |
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82 if not self.bundle(rev): |
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83 return revlog.revlog.chunk(self, rev, df, cachelen) |
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84 self.bundlefile.seek(self.start(rev)) |
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85 return self.bundlefile.read(self.length(rev)) |
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86 |
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87 def revdiff(self, rev1, rev2): |
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88 """return or calculate a delta between two revisions""" |
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89 if self.bundle(rev1) and self.bundle(rev2): |
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90 # hot path for bundle |
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91 revb = self.rev(self.bundlebase(rev2)) |
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92 if revb == rev1: |
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93 return self.chunk(rev2) |
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94 elif not self.bundle(rev1) and not self.bundle(rev2): |
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95 return revlog.revlog.revdiff(self, rev1, rev2) |
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96 |
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97 return self.diff(self.revision(self.node(rev1)), |
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98 self.revision(self.node(rev2))) |
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99 |
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100 def revision(self, node): |
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101 """return an uncompressed revision of a given""" |
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102 if node == nullid: return "" |
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103 |
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104 text = None |
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105 chain = [] |
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106 iter_node = node |
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107 rev = self.rev(iter_node) |
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108 # reconstruct the revision if it is from a changegroup |
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109 while self.bundle(rev): |
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110 if self.cache and self.cache[0] == iter_node: |
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111 text = self.cache[2] |
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112 break |
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113 chain.append(rev) |
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114 iter_node = self.bundlebase(rev) |
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115 rev = self.rev(iter_node) |
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116 if text is None: |
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117 text = revlog.revlog.revision(self, iter_node) |
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118 |
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119 while chain: |
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120 delta = self.chunk(chain.pop()) |
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121 text = self.patches(text, [delta]) |
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122 |
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123 p1, p2 = self.parents(node) |
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124 if node != revlog.hash(text, p1, p2): |
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125 raise revlog.RevlogError(_("integrity check failed on %s:%d") |
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126 % (self.datafile, self.rev(node))) |
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127 |
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128 self.cache = (node, self.rev(node), text) |
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129 return text |
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130 |
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131 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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132 raise NotImplementedError |
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133 def addgroup(self, revs, linkmapper, transaction, unique=0): |
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134 raise NotImplementedError |
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135 def strip(self, rev, minlink): |
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136 raise NotImplementedError |
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137 def checksize(self): |
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138 raise NotImplementedError |
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139 |
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140 class bundlechangelog(bundlerevlog, changelog.changelog): |
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141 def __init__(self, opener, bundlefile): |
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142 changelog.changelog.__init__(self, opener) |
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143 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile) |
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144 |
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145 class bundlemanifest(bundlerevlog, manifest.manifest): |
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146 def __init__(self, opener, bundlefile, linkmapper): |
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147 manifest.manifest.__init__(self, opener) |
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148 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile, |
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149 linkmapper) |
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150 |
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151 class bundlefilelog(bundlerevlog, filelog.filelog): |
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152 def __init__(self, opener, path, bundlefile, linkmapper): |
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153 filelog.filelog.__init__(self, opener, path) |
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154 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile, |
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155 linkmapper) |
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156 |
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157 class bundlerepository(localrepo.localrepository): |
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158 def __init__(self, ui, path, bundlename): |
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159 localrepo.localrepository.__init__(self, ui, path) |
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160 |
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161 self._url = 'bundle:' + bundlename |
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162 if path: self._url += '+' + path |
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163 |
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164 self.tempfile = None |
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165 self.bundlefile = open(bundlename, "rb") |
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166 header = self.bundlefile.read(6) |
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167 if not header.startswith("HG"): |
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168 raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename) |
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169 elif not header.startswith("HG10"): |
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170 raise util.Abort(_("%s: unknown bundle version") % bundlename) |
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171 elif header == "HG10BZ": |
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172 fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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173 suffix=".hg10un", dir=self.path) |
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174 self.tempfile = temp |
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175 fptemp = os.fdopen(fdtemp, 'wb') |
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176 def generator(f): |
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177 zd = bz2.BZ2Decompressor() |
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178 zd.decompress("BZ") |
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179 for chunk in f: |
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180 yield zd.decompress(chunk) |
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181 gen = generator(util.filechunkiter(self.bundlefile, 4096)) |
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182 |
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183 try: |
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184 fptemp.write("HG10UN") |
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185 for chunk in gen: |
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186 fptemp.write(chunk) |
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187 finally: |
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188 fptemp.close() |
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189 self.bundlefile.close() |
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190 |
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191 self.bundlefile = open(self.tempfile, "rb") |
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192 # seek right after the header |
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193 self.bundlefile.seek(6) |
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194 elif header == "HG10UN": |
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195 # nothing to do |
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196 pass |
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197 else: |
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198 raise util.Abort(_("%s: unknown bundle compression type") |
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199 % bundlename) |
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200 self.changelog = bundlechangelog(self.sopener, self.bundlefile) |
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201 self.manifest = bundlemanifest(self.sopener, self.bundlefile, |
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202 self.changelog.rev) |
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203 # dict with the mapping 'filename' -> position in the bundle |
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204 self.bundlefilespos = {} |
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205 while 1: |
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206 f = changegroup.getchunk(self.bundlefile) |
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207 if not f: |
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208 break |
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209 self.bundlefilespos[f] = self.bundlefile.tell() |
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210 for c in changegroup.chunkiter(self.bundlefile): |
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211 pass |
1942
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212 |
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213 def url(self): |
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214 return self._url |
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215 |
1942
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216 def dev(self): |
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217 return -1 |
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218 |
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219 def file(self, f): |
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220 if f[0] == '/': |
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221 f = f[1:] |
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222 if f in self.bundlefilespos: |
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223 self.bundlefile.seek(self.bundlefilespos[f]) |
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224 return bundlefilelog(self.sopener, f, self.bundlefile, |
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225 self.changelog.rev) |
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226 else: |
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227 return filelog.filelog(self.sopener, f) |
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228 |
1971
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229 def close(self): |
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230 """Close assigned bundle file immediately.""" |
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231 self.bundlefile.close() |
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232 |
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233 def __del__(self): |
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234 bundlefile = getattr(self, 'bundlefile', None) |
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235 if bundlefile and not bundlefile.closed: |
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236 bundlefile.close() |
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237 tempfile = getattr(self, 'tempfile', None) |
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238 if tempfile is not None: |
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239 os.unlink(tempfile) |
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240 |
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241 def instance(ui, path, create): |
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242 if create: |
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243 raise util.Abort(_('cannot create new bundle repository')) |
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244 path = util.drop_scheme('file', path) |
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245 if path.startswith('bundle:'): |
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246 path = util.drop_scheme('bundle', path) |
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247 s = path.split("+", 1) |
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248 if len(s) == 1: |
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249 repopath, bundlename = "", s[0] |
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250 else: |
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251 repopath, bundlename = s |
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252 else: |
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253 repopath, bundlename = '', path |
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254 return bundlerepository(ui, repopath, bundlename) |