Mercurial > hg
annotate mercurial/bundlerepo.py @ 8564:6b9ec23b09fc
named branches: improve pre-push logic (issue736)
Each named branch is considered separately, and the push is allowed if
no new branch heads are created for any named branch to be pushed.
Due to some tests's use of --debug, their output will change after this
addition. This has been fixed as well.
Co-contributor: Henrik Stuart <henrik.stuart@edlund.dk>
author | Sune Foldager <cryo@cyanite.org> |
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date | Sat, 23 May 2009 17:04:31 +0200 |
parents | b87a50b7125c |
children | 061eeb602354 |
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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 |
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6 # GNU General Public License version 2, incorporated herein by reference. |
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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, bz2, zlib, tempfile, shutil |
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17 import changegroup, util, mdiff |
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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, 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) |
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33 self.bundlefile = bundlefile |
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34 self.basemap = {} |
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35 def chunkpositer(): |
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36 for chunk in changegroup.chunkiter(bundlefile): |
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37 pos = bundlefile.tell() |
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38 yield chunk, pos - len(chunk) |
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39 n = len(self) |
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40 prev = None |
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41 for chunk, start in chunkpositer(): |
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42 size = len(chunk) |
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43 if size < 80: |
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44 raise util.Abort(_("invalid changegroup")) |
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45 start += 80 |
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46 size -= 80 |
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47 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
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48 if node in self.nodemap: |
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49 prev = node |
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50 continue |
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51 for p in (p1, p2): |
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52 if not p in self.nodemap: |
7633 | 53 raise error.LookupError(p1, self.indexfile, |
54 _("unknown parent")) | |
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55 if linkmapper is None: |
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56 link = n |
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57 else: |
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58 link = linkmapper(cs) |
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59 |
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60 if not prev: |
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61 prev = p1 |
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62 # start, size, full unc. size, base (unused), link, p1, p2, node |
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63 e = (revlog.offset_type(start, 0), size, -1, -1, link, |
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64 self.rev(p1), self.rev(p2), node) |
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65 self.basemap[n] = prev |
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66 self.index.insert(-1, e) |
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67 self.nodemap[node] = n |
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68 prev = node |
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69 n += 1 |
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70 |
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71 def bundle(self, rev): |
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72 """is rev from the bundle""" |
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73 if rev < 0: |
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74 return False |
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75 return rev in self.basemap |
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76 def bundlebase(self, rev): return self.basemap[rev] |
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77 def chunk(self, rev, df=None, cachelen=4096): |
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78 # Warning: in case of bundle, the diff is against bundlebase, |
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79 # not against rev - 1 |
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80 # XXX: could use some caching |
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81 if not self.bundle(rev): |
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82 return revlog.revlog.chunk(self, rev, df) |
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83 self.bundlefile.seek(self.start(rev)) |
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84 return self.bundlefile.read(self.length(rev)) |
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85 |
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86 def revdiff(self, rev1, rev2): |
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87 """return or calculate a delta between two revisions""" |
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88 if self.bundle(rev1) and self.bundle(rev2): |
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89 # hot path for bundle |
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90 revb = self.rev(self.bundlebase(rev2)) |
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91 if revb == rev1: |
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92 return self.chunk(rev2) |
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93 elif not self.bundle(rev1) and not self.bundle(rev2): |
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94 return revlog.revlog.revdiff(self, rev1, rev2) |
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95 |
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96 return mdiff.textdiff(self.revision(self.node(rev1)), |
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97 self.revision(self.node(rev2))) |
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98 |
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99 def revision(self, node): |
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100 """return an uncompressed revision of a given""" |
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101 if node == nullid: return "" |
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102 |
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103 text = None |
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104 chain = [] |
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105 iter_node = node |
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106 rev = self.rev(iter_node) |
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107 # reconstruct the revision if it is from a changegroup |
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108 while self.bundle(rev): |
4984 | 109 if self._cache and self._cache[0] == iter_node: |
110 text = self._cache[2] | |
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111 break |
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112 chain.append(rev) |
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113 iter_node = self.bundlebase(rev) |
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114 rev = self.rev(iter_node) |
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115 if text is None: |
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116 text = revlog.revlog.revision(self, iter_node) |
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117 |
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118 while chain: |
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119 delta = self.chunk(chain.pop()) |
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120 text = mdiff.patches(text, [delta]) |
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121 |
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122 p1, p2 = self.parents(node) |
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123 if node != revlog.hash(text, p1, p2): |
7633 | 124 raise error.RevlogError(_("integrity check failed on %s:%d") |
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125 % (self.datafile, self.rev(node))) |
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126 |
4984 | 127 self._cache = (node, self.rev(node), text) |
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128 return text |
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129 |
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130 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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131 raise NotImplementedError |
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132 def addgroup(self, revs, linkmapper, transaction): |
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133 raise NotImplementedError |
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134 def strip(self, rev, minlink): |
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135 raise NotImplementedError |
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136 def checksize(self): |
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137 raise NotImplementedError |
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138 |
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139 class bundlechangelog(bundlerevlog, changelog.changelog): |
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140 def __init__(self, opener, bundlefile): |
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141 changelog.changelog.__init__(self, opener) |
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142 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile) |
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143 |
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144 class bundlemanifest(bundlerevlog, manifest.manifest): |
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145 def __init__(self, opener, bundlefile, linkmapper): |
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146 manifest.manifest.__init__(self, opener) |
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147 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile, |
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148 linkmapper) |
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149 |
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150 class bundlefilelog(bundlerevlog, filelog.filelog): |
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151 def __init__(self, opener, path, bundlefile, linkmapper): |
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152 filelog.filelog.__init__(self, opener, path) |
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153 bundlerevlog.__init__(self, opener, self.indexfile, bundlefile, |
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154 linkmapper) |
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155 |
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156 class bundlerepository(localrepo.localrepository): |
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157 def __init__(self, ui, path, bundlename): |
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158 self._tempparent = None |
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159 try: |
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160 localrepo.localrepository.__init__(self, ui, path) |
7637 | 161 except error.RepoError: |
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162 self._tempparent = tempfile.mkdtemp() |
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163 localrepo.instance(ui,self._tempparent,1) |
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164 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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165 |
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166 if path: |
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167 self._url = 'bundle:' + path + '+' + bundlename |
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168 else: |
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169 self._url = 'bundle:' + bundlename |
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170 |
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171 self.tempfile = None |
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172 self.bundlefile = open(bundlename, "rb") |
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173 header = self.bundlefile.read(6) |
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174 if not header.startswith("HG"): |
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175 raise util.Abort(_("%s: not a Mercurial bundle file") % bundlename) |
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176 elif not header.startswith("HG10"): |
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177 raise util.Abort(_("%s: unknown bundle version") % bundlename) |
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178 elif (header == "HG10BZ") or (header == "HG10GZ"): |
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179 fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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180 suffix=".hg10un", dir=self.path) |
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181 self.tempfile = temp |
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182 fptemp = os.fdopen(fdtemp, 'wb') |
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183 def generator(f): |
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184 if header == "HG10BZ": |
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185 zd = bz2.BZ2Decompressor() |
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186 zd.decompress("BZ") |
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187 elif header == "HG10GZ": |
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188 zd = zlib.decompressobj() |
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189 for chunk in f: |
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190 yield zd.decompress(chunk) |
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191 gen = generator(util.filechunkiter(self.bundlefile, 4096)) |
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192 |
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193 try: |
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194 fptemp.write("HG10UN") |
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195 for chunk in gen: |
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196 fptemp.write(chunk) |
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197 finally: |
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198 fptemp.close() |
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199 self.bundlefile.close() |
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200 |
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201 self.bundlefile = open(self.tempfile, "rb") |
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202 # seek right after the header |
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203 self.bundlefile.seek(6) |
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204 elif header == "HG10UN": |
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205 # nothing to do |
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206 pass |
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207 else: |
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208 raise util.Abort(_("%s: unknown bundle compression type") |
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209 % bundlename) |
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210 # dict with the mapping 'filename' -> position in the bundle |
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211 self.bundlefilespos = {} |
5262 | 212 |
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213 @util.propertycache |
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214 def changelog(self): |
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215 c = bundlechangelog(self.sopener, self.bundlefile) |
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216 self.manstart = self.bundlefile.tell() |
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217 return c |
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218 |
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219 @util.propertycache |
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220 def manifest(self): |
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221 self.bundlefile.seek(self.manstart) |
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222 m = bundlemanifest(self.sopener, self.bundlefile, self.changelog.rev) |
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223 self.filestart = self.bundlefile.tell() |
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224 return m |
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225 |
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226 @util.propertycache |
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227 def manstart(self): |
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228 self.changelog |
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229 return self.manstart |
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230 |
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231 @util.propertycache |
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232 def filestart(self): |
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233 self.manifest |
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234 return self.filestart |
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235 |
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236 def url(self): |
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237 return self._url |
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238 |
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239 def file(self, f): |
5262 | 240 if not self.bundlefilespos: |
241 self.bundlefile.seek(self.filestart) | |
242 while 1: | |
243 chunk = changegroup.getchunk(self.bundlefile) | |
244 if not chunk: | |
245 break | |
246 self.bundlefilespos[chunk] = self.bundlefile.tell() | |
247 for c in changegroup.chunkiter(self.bundlefile): | |
248 pass | |
249 | |
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250 if f[0] == '/': |
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251 f = f[1:] |
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252 if f in self.bundlefilespos: |
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253 self.bundlefile.seek(self.bundlefilespos[f]) |
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254 return bundlefilelog(self.sopener, f, self.bundlefile, |
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255 self.changelog.rev) |
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256 else: |
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257 return filelog.filelog(self.sopener, f) |
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258 |
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259 def close(self): |
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260 """Close assigned bundle file immediately.""" |
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261 self.bundlefile.close() |
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262 |
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263 def __del__(self): |
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264 bundlefile = getattr(self, 'bundlefile', None) |
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265 if bundlefile and not bundlefile.closed: |
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266 bundlefile.close() |
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267 tempfile = getattr(self, 'tempfile', None) |
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268 if tempfile is not None: |
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269 os.unlink(tempfile) |
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270 if self._tempparent: |
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271 shutil.rmtree(self._tempparent, True) |
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272 |
6315 | 273 def cancopy(self): |
274 return False | |
275 | |
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276 def getcwd(self): |
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277 return os.getcwd() # always outside the repo |
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278 |
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279 def instance(ui, path, create): |
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280 if create: |
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281 raise util.Abort(_('cannot create new bundle repository')) |
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282 parentpath = ui.config("bundle", "mainreporoot", "") |
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283 if parentpath: |
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284 # Try to make the full path relative so we get a nice, short URL. |
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285 # In particular, we don't want temp dir names in test outputs. |
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286 cwd = os.getcwd() |
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287 if parentpath == cwd: |
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288 parentpath = '' |
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289 else: |
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290 cwd = os.path.join(cwd,'') |
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291 if parentpath.startswith(cwd): |
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292 parentpath = parentpath[len(cwd):] |
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293 path = util.drop_scheme('file', path) |
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294 if path.startswith('bundle:'): |
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295 path = util.drop_scheme('bundle', path) |
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296 s = path.split("+", 1) |
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297 if len(s) == 1: |
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298 repopath, bundlename = parentpath, s[0] |
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299 else: |
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300 repopath, bundlename = s |
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301 else: |
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302 repopath, bundlename = parentpath, path |
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303 return bundlerepository(ui, repopath, bundlename) |