Mercurial > hg
annotate mercurial/bundlerepo.py @ 12957:9f2ac318b92e
util: clarify purpose of MBTextWrapper class
It's easy to get confused and scared of an Unicode monster when
skimming through this code: document that this is really just
about column-counting.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
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date | Tue, 09 Nov 2010 13:43:35 +0900 |
parents | 5dfd1c49dcc5 |
children | ad63e5f834e1 |
rev | line source |
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1 # bundlerepo.py - repository class for viewing uncompressed bundles |
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2 # |
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3 # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """Repository class for viewing uncompressed bundles. |
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9 |
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10 This provides a read-only repository interface to bundles as if they |
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11 were part of the actual repository. |
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12 """ |
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13 |
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14 from node import nullid |
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16 import os, struct, tempfile, shutil |
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17 import changegroup, util, mdiff, discovery |
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18 import localrepo, changelog, manifest, filelog, revlog, error |
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19 |
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20 class bundlerevlog(revlog.revlog): |
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21 def __init__(self, opener, indexfile, bundle, |
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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 bundle (an unbundle object). |
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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) |
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33 self.bundle = bundle |
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34 self.basemap = {} |
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35 def chunkpositer(): |
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36 while 1: |
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37 chunk = bundle.chunk() |
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38 if not chunk: |
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39 break |
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40 pos = bundle.tell() |
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41 yield chunk, pos - len(chunk) |
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42 n = len(self) |
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43 prev = None |
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44 for chunk, start in chunkpositer(): |
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45 size = len(chunk) |
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46 if size < 80: |
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47 raise util.Abort(_("invalid changegroup")) |
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48 start += 80 |
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49 size -= 80 |
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50 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
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51 if node in self.nodemap: |
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52 prev = node |
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53 continue |
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54 for p in (p1, p2): |
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55 if not p in self.nodemap: |
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56 raise error.LookupError(p, self.indexfile, |
7633 | 57 _("unknown parent")) |
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58 if linkmapper is None: |
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59 link = n |
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60 else: |
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61 link = linkmapper(cs) |
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62 |
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63 if not prev: |
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64 prev = p1 |
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65 # start, size, full unc. size, base (unused), link, p1, p2, node |
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66 e = (revlog.offset_type(start, 0), size, -1, -1, link, |
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67 self.rev(p1), self.rev(p2), node) |
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68 self.basemap[n] = prev |
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69 self.index.insert(-1, e) |
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70 self.nodemap[node] = n |
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71 prev = node |
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72 n += 1 |
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73 |
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74 def inbundle(self, rev): |
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75 """is rev from the bundle""" |
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76 if rev < 0: |
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77 return False |
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78 return rev in self.basemap |
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79 def bundlebase(self, rev): |
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80 return self.basemap[rev] |
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81 def _chunk(self, rev): |
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82 # Warning: in case of bundle, the diff is against bundlebase, |
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83 # not against rev - 1 |
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84 # XXX: could use some caching |
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85 if not self.inbundle(rev): |
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86 return revlog.revlog._chunk(self, rev) |
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87 self.bundle.seek(self.start(rev)) |
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88 return self.bundle.read(self.length(rev)) |
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89 |
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90 def revdiff(self, rev1, rev2): |
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91 """return or calculate a delta between two revisions""" |
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92 if self.inbundle(rev1) and self.inbundle(rev2): |
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93 # hot path for bundle |
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94 revb = self.rev(self.bundlebase(rev2)) |
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95 if revb == rev1: |
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96 return self._chunk(rev2) |
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97 elif not self.inbundle(rev1) and not self.inbundle(rev2): |
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98 return revlog.revlog.revdiff(self, rev1, rev2) |
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99 |
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100 return mdiff.textdiff(self.revision(self.node(rev1)), |
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101 self.revision(self.node(rev2))) |
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102 |
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103 def revision(self, node): |
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104 """return an uncompressed revision of a given""" |
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105 if node == nullid: |
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106 return "" |
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107 |
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108 text = None |
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109 chain = [] |
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110 iter_node = node |
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111 rev = self.rev(iter_node) |
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112 # reconstruct the revision if it is from a changegroup |
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113 while self.inbundle(rev): |
4984 | 114 if self._cache and self._cache[0] == iter_node: |
115 text = self._cache[2] | |
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116 break |
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117 chain.append(rev) |
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118 iter_node = self.bundlebase(rev) |
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119 rev = self.rev(iter_node) |
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120 if text is None: |
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121 text = revlog.revlog.revision(self, iter_node) |
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122 |
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123 while chain: |
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124 delta = self._chunk(chain.pop()) |
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125 text = mdiff.patches(text, [delta]) |
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126 |
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127 p1, p2 = self.parents(node) |
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128 if node != revlog.hash(text, p1, p2): |
7633 | 129 raise error.RevlogError(_("integrity check failed on %s:%d") |
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130 % (self.datafile, self.rev(node))) |
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131 |
4984 | 132 self._cache = (node, self.rev(node), text) |
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133 return text |
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134 |
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135 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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136 raise NotImplementedError |
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137 def addgroup(self, revs, linkmapper, transaction): |
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138 raise NotImplementedError |
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139 def strip(self, rev, minlink): |
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140 raise NotImplementedError |
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141 def checksize(self): |
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142 raise NotImplementedError |
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143 |
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144 class bundlechangelog(bundlerevlog, changelog.changelog): |
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145 def __init__(self, opener, bundle): |
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146 changelog.changelog.__init__(self, opener) |
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147 bundlerevlog.__init__(self, opener, self.indexfile, bundle) |
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148 |
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149 class bundlemanifest(bundlerevlog, manifest.manifest): |
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150 def __init__(self, opener, bundle, linkmapper): |
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151 manifest.manifest.__init__(self, opener) |
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152 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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153 linkmapper) |
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154 |
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155 class bundlefilelog(bundlerevlog, filelog.filelog): |
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156 def __init__(self, opener, path, bundle, linkmapper): |
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157 filelog.filelog.__init__(self, opener, path) |
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158 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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159 linkmapper) |
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160 |
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161 class bundlerepository(localrepo.localrepository): |
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162 def __init__(self, ui, path, bundlename): |
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163 self._tempparent = None |
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164 try: |
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165 localrepo.localrepository.__init__(self, ui, path) |
7637 | 166 except error.RepoError: |
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167 self._tempparent = tempfile.mkdtemp() |
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168 localrepo.instance(ui, self._tempparent, 1) |
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169 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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170 |
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171 if path: |
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172 self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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173 else: |
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174 self._url = 'bundle:' + bundlename |
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175 |
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176 self.tempfile = None |
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177 f = open(bundlename, "rb") |
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178 self.bundle = changegroup.readbundle(f, bundlename) |
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179 if self.bundle.compressed(): |
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180 fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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181 suffix=".hg10un", dir=self.path) |
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182 self.tempfile = temp |
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183 fptemp = os.fdopen(fdtemp, 'wb') |
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184 |
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185 try: |
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186 fptemp.write("HG10UN") |
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187 while 1: |
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188 chunk = self.bundle.read(2**18) |
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189 if not chunk: |
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190 break |
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191 fptemp.write(chunk) |
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192 finally: |
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193 fptemp.close() |
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194 |
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195 f = open(self.tempfile, "rb") |
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196 self.bundle = changegroup.readbundle(f, bundlename) |
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197 |
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198 # dict with the mapping 'filename' -> position in the bundle |
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199 self.bundlefilespos = {} |
5262 | 200 |
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201 @util.propertycache |
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202 def changelog(self): |
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203 c = bundlechangelog(self.sopener, self.bundle) |
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204 self.manstart = self.bundle.tell() |
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205 return c |
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206 |
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207 @util.propertycache |
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208 def manifest(self): |
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209 self.bundle.seek(self.manstart) |
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210 m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) |
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211 self.filestart = self.bundle.tell() |
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212 return m |
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213 |
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214 @util.propertycache |
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215 def manstart(self): |
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216 self.changelog |
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217 return self.manstart |
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218 |
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219 @util.propertycache |
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220 def filestart(self): |
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221 self.manifest |
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222 return self.filestart |
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223 |
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224 def url(self): |
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225 return self._url |
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226 |
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227 def file(self, f): |
5262 | 228 if not self.bundlefilespos: |
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229 self.bundle.seek(self.filestart) |
5262 | 230 while 1: |
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231 chunk = self.bundle.chunk() |
5262 | 232 if not chunk: |
233 break | |
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234 self.bundlefilespos[chunk] = self.bundle.tell() |
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235 while 1: |
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236 c = self.bundle.chunk() |
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237 if not c: |
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238 break |
5262 | 239 |
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240 if f[0] == '/': |
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241 f = f[1:] |
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242 if f in self.bundlefilespos: |
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243 self.bundle.seek(self.bundlefilespos[f]) |
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244 return bundlefilelog(self.sopener, f, self.bundle, |
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245 self.changelog.rev) |
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246 else: |
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247 return filelog.filelog(self.sopener, f) |
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248 |
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249 def close(self): |
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250 """Close assigned bundle file immediately.""" |
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251 self.bundle.close() |
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252 |
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253 def __del__(self): |
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254 del self.bundle |
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255 if tempfile is not None: |
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256 os.unlink(tempfile) |
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257 if self._tempparent: |
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258 shutil.rmtree(self._tempparent, True) |
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259 |
6315 | 260 def cancopy(self): |
261 return False | |
262 | |
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263 def getcwd(self): |
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264 return os.getcwd() # always outside the repo |
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265 |
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266 def instance(ui, path, create): |
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267 if create: |
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268 raise util.Abort(_('cannot create new bundle repository')) |
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269 parentpath = ui.config("bundle", "mainreporoot", "") |
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270 if parentpath: |
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271 # Try to make the full path relative so we get a nice, short URL. |
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272 # In particular, we don't want temp dir names in test outputs. |
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273 cwd = os.getcwd() |
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274 if parentpath == cwd: |
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275 parentpath = '' |
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276 else: |
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277 cwd = os.path.join(cwd,'') |
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278 if parentpath.startswith(cwd): |
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279 parentpath = parentpath[len(cwd):] |
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280 path = util.drop_scheme('file', path) |
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281 if path.startswith('bundle:'): |
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282 path = util.drop_scheme('bundle', path) |
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283 s = path.split("+", 1) |
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284 if len(s) == 1: |
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285 repopath, bundlename = parentpath, s[0] |
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286 else: |
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287 repopath, bundlename = s |
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288 else: |
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289 repopath, bundlename = parentpath, path |
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290 return bundlerepository(ui, repopath, bundlename) |
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291 |
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292 def getremotechanges(ui, repo, other, revs=None, bundlename=None, force=False): |
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293 tmp = discovery.findcommonincoming(repo, other, heads=revs, force=force) |
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294 common, incoming, rheads = tmp |
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295 if not incoming: |
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296 try: |
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297 os.unlink(bundlename) |
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298 except: |
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299 pass |
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300 return other, None, None |
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301 |
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302 bundle = None |
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303 if bundlename or not other.local(): |
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304 # create a bundle (uncompressed if other repo is not local) |
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305 |
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306 if revs is None and other.capable('changegroupsubset'): |
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307 revs = rheads |
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308 |
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309 if revs is None: |
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310 cg = other.changegroup(incoming, "incoming") |
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311 else: |
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312 cg = other.changegroupsubset(incoming, revs, 'incoming') |
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313 bundletype = other.local() and "HG10BZ" or "HG10UN" |
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314 fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) |
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315 # keep written bundle? |
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316 if bundlename: |
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317 bundle = None |
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318 if not other.local(): |
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319 # use the created uncompressed bundlerepo |
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320 other = bundlerepository(ui, repo.root, fname) |
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321 return (other, incoming, bundle) |
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322 |