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1 | 1 | # bundlerepo.py - repository class for viewing uncompressed bundles |
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2 | 2 | # |
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3 | 3 | # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | """Repository class for viewing uncompressed bundles. |
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9 | 9 | |
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10 | 10 | This provides a read-only repository interface to bundles as if they |
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11 | 11 | were part of the actual repository. |
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12 | 12 | """ |
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13 | 13 | |
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14 | 14 | from node import nullid |
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15 | 15 | from i18n import _ |
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16 | 16 | import os, struct, tempfile, shutil |
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17 | 17 | import changegroup, util, mdiff, discovery |
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18 | 18 | import localrepo, changelog, manifest, filelog, revlog, error |
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19 | 19 | |
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20 | 20 | class bundlerevlog(revlog.revlog): |
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21 | 21 | def __init__(self, opener, indexfile, bundle, |
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22 | 22 | linkmapper=None): |
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23 | 23 | # How it works: |
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24 | 24 | # to retrieve a revision, we need to know the offset of |
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25 | 25 | # the revision in the bundle (an unbundle object). |
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26 | 26 | # |
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27 | 27 | # We store this offset in the index (start), to differentiate a |
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28 | 28 | # rev in the bundle and from a rev in the revlog, we check |
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29 | 29 | # len(index[r]). If the tuple is bigger than 7, it is a bundle |
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30 | 30 | # (it is bigger since we store the node to which the delta is) |
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31 | 31 | # |
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32 | 32 | revlog.revlog.__init__(self, opener, indexfile) |
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33 | 33 | self.bundle = bundle |
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34 | 34 | self.basemap = {} |
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35 | 35 | def chunkpositer(): |
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36 | 36 | while 1: |
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37 | 37 | chunk = bundle.chunk() |
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38 | 38 | if not chunk: |
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39 | 39 | break |
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40 | 40 | pos = bundle.tell() |
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41 | 41 | yield chunk, pos - len(chunk) |
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42 | 42 | n = len(self) |
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43 | 43 | prev = None |
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44 | 44 | for chunk, start in chunkpositer(): |
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45 | 45 | size = len(chunk) |
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46 | 46 | if size < 80: |
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47 | 47 | raise util.Abort(_("invalid changegroup")) |
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48 | 48 | start += 80 |
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49 | 49 | size -= 80 |
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50 | 50 | node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) |
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51 | 51 | if node in self.nodemap: |
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52 | 52 | prev = node |
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53 | 53 | continue |
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54 | 54 | for p in (p1, p2): |
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55 | 55 | if not p in self.nodemap: |
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56 | 56 | raise error.LookupError(p, self.indexfile, |
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57 | 57 | _("unknown parent")) |
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58 | 58 | if linkmapper is None: |
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59 | 59 | link = n |
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60 | 60 | else: |
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61 | 61 | link = linkmapper(cs) |
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62 | 62 | |
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63 | 63 | if not prev: |
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64 | 64 | prev = p1 |
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65 | 65 | # start, size, full unc. size, base (unused), link, p1, p2, node |
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66 | 66 | e = (revlog.offset_type(start, 0), size, -1, -1, link, |
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67 | 67 | self.rev(p1), self.rev(p2), node) |
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68 | 68 | self.basemap[n] = prev |
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69 | 69 | self.index.insert(-1, e) |
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70 | 70 | self.nodemap[node] = n |
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71 | 71 | prev = node |
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72 | 72 | n += 1 |
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73 | 73 | |
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74 | 74 | def inbundle(self, rev): |
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75 | 75 | """is rev from the bundle""" |
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76 | 76 | if rev < 0: |
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77 | 77 | return False |
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78 | 78 | return rev in self.basemap |
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79 | 79 | def bundlebase(self, rev): |
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80 | 80 | return self.basemap[rev] |
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81 | 81 | def _chunk(self, rev): |
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82 | 82 | # Warning: in case of bundle, the diff is against bundlebase, |
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83 | 83 | # not against rev - 1 |
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84 | 84 | # XXX: could use some caching |
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85 | 85 | if not self.inbundle(rev): |
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86 | 86 | return revlog.revlog._chunk(self, rev) |
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87 | 87 | self.bundle.seek(self.start(rev)) |
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88 | 88 | return self.bundle.read(self.length(rev)) |
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89 | 89 | |
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90 | 90 | def revdiff(self, rev1, rev2): |
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91 | 91 | """return or calculate a delta between two revisions""" |
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92 | 92 | if self.inbundle(rev1) and self.inbundle(rev2): |
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93 | 93 | # hot path for bundle |
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94 | 94 | revb = self.rev(self.bundlebase(rev2)) |
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95 | 95 | if revb == rev1: |
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96 | 96 | return self._chunk(rev2) |
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97 | 97 | elif not self.inbundle(rev1) and not self.inbundle(rev2): |
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98 | 98 | return revlog.revlog.revdiff(self, rev1, rev2) |
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99 | 99 | |
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100 | 100 | return mdiff.textdiff(self.revision(self.node(rev1)), |
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101 | 101 | self.revision(self.node(rev2))) |
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102 | 102 | |
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103 | 103 | def revision(self, node): |
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104 | 104 | """return an uncompressed revision of a given""" |
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105 | 105 | if node == nullid: |
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106 | 106 | return "" |
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107 | 107 | |
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108 | 108 | text = None |
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109 | 109 | chain = [] |
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110 | 110 | iter_node = node |
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111 | 111 | rev = self.rev(iter_node) |
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112 | 112 | # reconstruct the revision if it is from a changegroup |
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113 | 113 | while self.inbundle(rev): |
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114 | 114 | if self._cache and self._cache[0] == iter_node: |
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115 | 115 | text = self._cache[2] |
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116 | 116 | break |
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117 | 117 | chain.append(rev) |
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118 | 118 | iter_node = self.bundlebase(rev) |
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119 | 119 | rev = self.rev(iter_node) |
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120 | 120 | if text is None: |
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121 | 121 | text = revlog.revlog.revision(self, iter_node) |
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122 | 122 | |
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123 | 123 | while chain: |
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124 | 124 | delta = self._chunk(chain.pop()) |
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125 | 125 | text = mdiff.patches(text, [delta]) |
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126 | 126 | |
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127 | 127 | p1, p2 = self.parents(node) |
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128 | 128 | if node != revlog.hash(text, p1, p2): |
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129 | 129 | raise error.RevlogError(_("integrity check failed on %s:%d") |
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130 | 130 | % (self.datafile, self.rev(node))) |
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131 | 131 | |
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132 | 132 | self._cache = (node, self.rev(node), text) |
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133 | 133 | return text |
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134 | 134 | |
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135 | 135 | def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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136 | 136 | raise NotImplementedError |
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137 | 137 | def addgroup(self, revs, linkmapper, transaction): |
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138 | 138 | raise NotImplementedError |
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139 | 139 | def strip(self, rev, minlink): |
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140 | 140 | raise NotImplementedError |
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141 | 141 | def checksize(self): |
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142 | 142 | raise NotImplementedError |
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143 | 143 | |
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144 | 144 | class bundlechangelog(bundlerevlog, changelog.changelog): |
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145 | 145 | def __init__(self, opener, bundle): |
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146 | 146 | changelog.changelog.__init__(self, opener) |
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147 | 147 | bundlerevlog.__init__(self, opener, self.indexfile, bundle) |
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148 | 148 | |
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149 | 149 | class bundlemanifest(bundlerevlog, manifest.manifest): |
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150 | 150 | def __init__(self, opener, bundle, linkmapper): |
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151 | 151 | manifest.manifest.__init__(self, opener) |
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152 | 152 | bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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153 | 153 | linkmapper) |
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154 | 154 | |
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155 | 155 | class bundlefilelog(bundlerevlog, filelog.filelog): |
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156 | 156 | def __init__(self, opener, path, bundle, linkmapper): |
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157 | 157 | filelog.filelog.__init__(self, opener, path) |
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158 | 158 | bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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159 | 159 | linkmapper) |
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160 | 160 | |
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161 | 161 | class bundlerepository(localrepo.localrepository): |
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162 | 162 | def __init__(self, ui, path, bundlename): |
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163 | 163 | self._tempparent = None |
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164 | 164 | try: |
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165 | 165 | localrepo.localrepository.__init__(self, ui, path) |
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166 | 166 | except error.RepoError: |
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167 | 167 | self._tempparent = tempfile.mkdtemp() |
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168 | 168 | localrepo.instance(ui, self._tempparent, 1) |
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169 | 169 | localrepo.localrepository.__init__(self, ui, self._tempparent) |
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170 | 170 | |
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171 | 171 | if path: |
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172 | 172 | self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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173 | 173 | else: |
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174 | 174 | self._url = 'bundle:' + bundlename |
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175 | 175 | |
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176 | 176 | self.tempfile = None |
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177 | 177 | f = open(bundlename, "rb") |
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178 | 178 | self.bundle = changegroup.readbundle(f, bundlename) |
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179 | 179 | if self.bundle.compressed(): |
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180 | 180 | fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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181 | 181 | suffix=".hg10un", dir=self.path) |
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182 | 182 | self.tempfile = temp |
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183 | 183 | fptemp = os.fdopen(fdtemp, 'wb') |
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184 | 184 | |
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185 | 185 | try: |
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186 | 186 | fptemp.write("HG10UN") |
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187 | 187 | while 1: |
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188 | 188 | chunk = self.bundle.read(2**18) |
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189 | 189 | if not chunk: |
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190 | 190 | break |
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191 | 191 | fptemp.write(chunk) |
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192 | 192 | finally: |
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193 | 193 | fptemp.close() |
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194 | 194 | |
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195 | 195 | f = open(self.tempfile, "rb") |
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196 | 196 | self.bundle = changegroup.readbundle(f, bundlename) |
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197 | 197 | |
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198 | 198 | # dict with the mapping 'filename' -> position in the bundle |
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199 | 199 | self.bundlefilespos = {} |
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200 | 200 | |
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201 | 201 | @util.propertycache |
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202 | 202 | def changelog(self): |
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203 | 203 | c = bundlechangelog(self.sopener, self.bundle) |
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204 | 204 | self.manstart = self.bundle.tell() |
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205 | 205 | return c |
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206 | 206 | |
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207 | 207 | @util.propertycache |
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208 | 208 | def manifest(self): |
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209 | 209 | self.bundle.seek(self.manstart) |
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210 | 210 | m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) |
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211 | 211 | self.filestart = self.bundle.tell() |
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212 | 212 | return m |
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213 | 213 | |
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214 | 214 | @util.propertycache |
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215 | 215 | def manstart(self): |
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216 | 216 | self.changelog |
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217 | 217 | return self.manstart |
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218 | 218 | |
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219 | 219 | @util.propertycache |
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220 | 220 | def filestart(self): |
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221 | 221 | self.manifest |
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222 | 222 | return self.filestart |
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223 | 223 | |
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224 | 224 | def url(self): |
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225 | 225 | return self._url |
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226 | 226 | |
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227 | 227 | def file(self, f): |
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228 | 228 | if not self.bundlefilespos: |
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229 | 229 | self.bundle.seek(self.filestart) |
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230 | 230 | while 1: |
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231 | 231 | chunk = self.bundle.chunk() |
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232 | 232 | if not chunk: |
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233 | 233 | break |
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234 | 234 | self.bundlefilespos[chunk] = self.bundle.tell() |
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235 | 235 | while 1: |
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236 | 236 | c = self.bundle.chunk() |
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237 | 237 | if not c: |
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238 | 238 | break |
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239 | 239 | |
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240 | 240 | if f[0] == '/': |
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241 | 241 | f = f[1:] |
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242 | 242 | if f in self.bundlefilespos: |
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243 | 243 | self.bundle.seek(self.bundlefilespos[f]) |
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244 | 244 | return bundlefilelog(self.sopener, f, self.bundle, |
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245 | 245 | self.changelog.rev) |
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246 | 246 | else: |
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247 | 247 | return filelog.filelog(self.sopener, f) |
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248 | 248 | |
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249 | 249 | def close(self): |
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250 | 250 | """Close assigned bundle file immediately.""" |
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251 | 251 | self.bundle.close() |
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252 | 252 | |
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253 | 253 | def __del__(self): |
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254 | 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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255 | if self.tempfile is not None: | |
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256 | os.unlink(self.tempfile) | |
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257 | 257 | if self._tempparent: |
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258 | 258 | shutil.rmtree(self._tempparent, True) |
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259 | 259 | |
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260 | 260 | def cancopy(self): |
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261 | 261 | return False |
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262 | 262 | |
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263 | 263 | def getcwd(self): |
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264 | 264 | return os.getcwd() # always outside the repo |
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265 | 265 | |
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266 | 266 | def instance(ui, path, create): |
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267 | 267 | if create: |
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268 | 268 | raise util.Abort(_('cannot create new bundle repository')) |
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269 | 269 | parentpath = ui.config("bundle", "mainreporoot", "") |
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270 | 270 | if parentpath: |
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271 | 271 | # Try to make the full path relative so we get a nice, short URL. |
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272 | 272 | # In particular, we don't want temp dir names in test outputs. |
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273 | 273 | cwd = os.getcwd() |
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274 | 274 | if parentpath == cwd: |
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275 | 275 | parentpath = '' |
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276 | 276 | else: |
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277 | 277 | cwd = os.path.join(cwd,'') |
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278 | 278 | if parentpath.startswith(cwd): |
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279 | 279 | parentpath = parentpath[len(cwd):] |
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280 | 280 | path = util.drop_scheme('file', path) |
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281 | 281 | if path.startswith('bundle:'): |
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282 | 282 | path = util.drop_scheme('bundle', path) |
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283 | 283 | s = path.split("+", 1) |
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284 | 284 | if len(s) == 1: |
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285 | 285 | repopath, bundlename = parentpath, s[0] |
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286 | 286 | else: |
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287 | 287 | repopath, bundlename = s |
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288 | 288 | else: |
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289 | 289 | repopath, bundlename = parentpath, path |
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290 | 290 | return bundlerepository(ui, repopath, bundlename) |
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291 | 291 | |
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292 | 292 | def getremotechanges(ui, repo, other, revs=None, bundlename=None, force=False): |
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293 | 293 | tmp = discovery.findcommonincoming(repo, other, heads=revs, force=force) |
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294 | 294 | common, incoming, rheads = tmp |
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295 | 295 | if not incoming: |
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296 | 296 | try: |
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297 | 297 | os.unlink(bundlename) |
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298 | 298 | except: |
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299 | 299 | pass |
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300 | 300 | return other, None, None |
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301 | 301 | |
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302 | 302 | bundle = None |
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303 | 303 | if bundlename or not other.local(): |
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304 | 304 | # create a bundle (uncompressed if other repo is not local) |
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305 | 305 | |
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306 | 306 | if revs is None and other.capable('changegroupsubset'): |
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307 | 307 | revs = rheads |
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308 | 308 | |
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309 | 309 | if revs is None: |
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310 | 310 | cg = other.changegroup(incoming, "incoming") |
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311 | 311 | else: |
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312 | 312 | cg = other.changegroupsubset(incoming, revs, 'incoming') |
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313 | 313 | bundletype = other.local() and "HG10BZ" or "HG10UN" |
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314 | 314 | fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) |
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315 | 315 | # keep written bundle? |
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316 | 316 | if bundlename: |
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317 | 317 | bundle = None |
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318 | 318 | if not other.local(): |
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319 | 319 | # use the created uncompressed bundlerepo |
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320 | 320 | other = bundlerepository(ui, repo.root, fname) |
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321 | 321 | return (other, incoming, bundle) |
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322 | 322 |
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