Mercurial > hg
annotate mercurial/unionrepo.py @ 50757:19108906abaf stable
extensions: imp module is removed in Python 3.12 - use importlib to load files
imp has been deprecated for a long time, and has finally been removed in Python
3.12 .
imp was only used for loading extensions that has been specified with direct
.py path or path to a package directory. The same use cases can be achieved
quite simple with importlib, , possiby with small changes in corner cases with
undefined behaviour, such as extensions without .py source.
There might also be corner cases and undefined behaviour around use of
sys.modules and reloading.
author | Mads Kiilerich <mads@kiilerich.com> |
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date | Wed, 28 Jun 2023 14:23:13 +0200 |
parents | 3a2df812e1c7 |
children | 18c8c18993f0 |
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1 # unionrepo.py - repository class for viewing union of repository changesets |
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2 # |
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3 # Derived from bundlerepo.py |
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4 # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> |
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5 # Copyright 2013 Unity Technologies, Mads Kiilerich <madski@unity3d.com> |
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6 # |
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7 # This software may be used and distributed according to the terms of the |
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8 # GNU General Public License version 2 or any later version. |
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9 |
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10 """Repository class for "in-memory pull" of one local repository to another, |
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11 allowing operations like diff and log with revsets. |
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12 """ |
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13 |
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14 |
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15 from .i18n import _ |
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16 from .pycompat import getattr |
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17 |
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18 from . import ( |
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19 changelog, |
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20 cmdutil, |
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21 encoding, |
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22 error, |
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23 filelog, |
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24 localrepo, |
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25 manifest, |
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26 mdiff, |
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27 pathutil, |
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28 revlog, |
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29 util, |
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30 vfs as vfsmod, |
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31 ) |
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32 |
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33 from .revlogutils import ( |
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34 constants as revlog_constants, |
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35 ) |
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36 |
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37 |
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38 class unionrevlog(revlog.revlog): |
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39 def __init__(self, opener, radix, revlog2, linkmapper): |
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40 # How it works: |
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41 # To retrieve a revision, we just need to know the node id so we can |
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42 # look it up in revlog2. |
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43 # |
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44 # To differentiate a rev in the second revlog from a rev in the revlog, |
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45 # we check revision against repotiprev. |
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46 opener = vfsmod.readonlyvfs(opener) |
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47 target = getattr(revlog2, 'target', None) |
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48 if target is None: |
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49 # a revlog wrapper, eg: the manifestlog that is not an actual revlog |
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50 target = revlog2._revlog.target |
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51 revlog.revlog.__init__(self, opener, target=target, radix=radix) |
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52 self.revlog2 = revlog2 |
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53 |
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54 n = len(self) |
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55 self.repotiprev = n - 1 |
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56 self.bundlerevs = set() # used by 'bundle()' revset expression |
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57 for rev2 in self.revlog2: |
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58 rev = self.revlog2.index[rev2] |
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59 # rev numbers - in revlog2, very different from self.rev |
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60 ( |
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61 _start, |
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62 _csize, |
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63 rsize, |
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64 base, |
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65 linkrev, |
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66 p1rev, |
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67 p2rev, |
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68 node, |
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69 _sdo, |
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70 _sds, |
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71 _dcm, |
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72 _sdcm, |
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73 rank, |
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74 ) = rev |
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75 flags = _start & 0xFFFF |
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76 |
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77 if linkmapper is None: # link is to same revlog |
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78 assert linkrev == rev2 # we never link back |
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79 link = n |
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80 else: # rev must be mapped from repo2 cl to unified cl by linkmapper |
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81 link = linkmapper(linkrev) |
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82 |
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83 if linkmapper is not None: # link is to same revlog |
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84 base = linkmapper(base) |
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85 |
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86 this_rev = self.index.get_rev(node) |
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87 if this_rev is not None: |
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88 # this happens for the common revlog revisions |
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89 self.bundlerevs.add(this_rev) |
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90 continue |
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91 |
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92 p1node = self.revlog2.node(p1rev) |
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93 p2node = self.revlog2.node(p2rev) |
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94 |
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95 # TODO: it's probably wrong to set compressed length to -1, but |
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96 # I have no idea if csize is valid in the base revlog context. |
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97 e = ( |
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98 flags, |
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99 -1, |
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100 rsize, |
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101 base, |
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102 link, |
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103 self.rev(p1node), |
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104 self.rev(p2node), |
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105 node, |
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106 0, # sidedata offset |
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107 0, # sidedata size |
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108 revlog_constants.COMP_MODE_INLINE, |
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109 revlog_constants.COMP_MODE_INLINE, |
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110 rank, |
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111 ) |
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112 self.index.append(e) |
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113 self.bundlerevs.add(n) |
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114 n += 1 |
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115 |
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116 def _chunk(self, rev, df=None): |
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117 if rev <= self.repotiprev: |
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118 return revlog.revlog._chunk(self, rev) |
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119 return self.revlog2._chunk(self.node(rev)) |
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120 |
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121 def revdiff(self, rev1, rev2): |
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122 """return or calculate a delta between two revisions""" |
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123 if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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124 return self.revlog2.revdiff( |
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125 self.revlog2.rev(self.node(rev1)), |
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126 self.revlog2.rev(self.node(rev2)), |
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127 ) |
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128 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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129 return super(unionrevlog, self).revdiff(rev1, rev2) |
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130 |
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131 return mdiff.textdiff(self.rawdata(rev1), self.rawdata(rev2)) |
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132 |
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133 def _revisiondata(self, nodeorrev, _df=None, raw=False): |
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134 if isinstance(nodeorrev, int): |
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135 rev = nodeorrev |
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136 node = self.node(rev) |
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137 else: |
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138 node = nodeorrev |
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139 rev = self.rev(node) |
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140 |
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141 if rev > self.repotiprev: |
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142 # work around manifestrevlog NOT being a revlog |
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143 revlog2 = getattr(self.revlog2, '_revlog', self.revlog2) |
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144 func = revlog2._revisiondata |
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145 else: |
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146 func = super(unionrevlog, self)._revisiondata |
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147 return func(node, _df=_df, raw=raw) |
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148 |
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149 def addrevision( |
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150 self, |
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151 text, |
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152 transaction, |
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153 link, |
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154 p1, |
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155 p2, |
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156 cachedelta=None, |
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157 node=None, |
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158 flags=revlog.REVIDX_DEFAULT_FLAGS, |
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159 deltacomputer=None, |
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160 sidedata=None, |
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161 ): |
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162 raise NotImplementedError |
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163 |
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164 def addgroup( |
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165 self, |
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166 deltas, |
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167 linkmapper, |
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168 transaction, |
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169 alwayscache=False, |
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170 addrevisioncb=None, |
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171 duplicaterevisioncb=None, |
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172 debug_info=None, |
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173 delta_base_reuse_policy=None, |
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174 ): |
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175 raise NotImplementedError |
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176 |
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177 def strip(self, minlink, transaction): |
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178 raise NotImplementedError |
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179 |
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180 def checksize(self): |
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181 raise NotImplementedError |
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182 |
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183 |
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184 class unionchangelog(unionrevlog, changelog.changelog): |
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185 def __init__(self, opener, opener2): |
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186 changelog.changelog.__init__(self, opener) |
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187 linkmapper = None |
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188 changelog2 = changelog.changelog(opener2) |
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189 unionrevlog.__init__(self, opener, self.radix, changelog2, linkmapper) |
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190 |
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191 |
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192 class unionmanifest(unionrevlog, manifest.manifestrevlog): |
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193 def __init__(self, nodeconstants, opener, opener2, linkmapper): |
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194 manifest.manifestrevlog.__init__(self, nodeconstants, opener) |
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195 manifest2 = manifest.manifestrevlog(nodeconstants, opener2) |
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196 unionrevlog.__init__( |
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197 self, opener, self._revlog.radix, manifest2, linkmapper |
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198 ) |
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199 |
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200 |
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201 class unionfilelog(filelog.filelog): |
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202 def __init__(self, opener, path, opener2, linkmapper, repo): |
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203 filelog.filelog.__init__(self, opener, path) |
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204 filelog2 = filelog.filelog(opener2, path) |
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205 self._revlog = unionrevlog( |
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206 opener, self._revlog.radix, filelog2._revlog, linkmapper |
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207 ) |
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208 self._repo = repo |
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209 self.repotiprev = self._revlog.repotiprev |
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210 self.revlog2 = self._revlog.revlog2 |
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211 |
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212 def iscensored(self, rev): |
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213 """Check if a revision is censored.""" |
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214 if rev <= self.repotiprev: |
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215 return filelog.filelog.iscensored(self, rev) |
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216 node = self.node(rev) |
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217 return self.revlog2.iscensored(self.revlog2.rev(node)) |
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218 |
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219 |
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220 class unionpeer(localrepo.localpeer): |
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221 def canpush(self): |
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222 return False |
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223 |
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224 |
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225 class unionrepository: |
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226 """Represents the union of data in 2 repositories. |
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227 |
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228 Instances are not usable if constructed directly. Use ``instance()`` |
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229 or ``makeunionrepository()`` to create a usable instance. |
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230 """ |
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231 |
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232 def __init__(self, repo2, url): |
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233 self.repo2 = repo2 |
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234 self._url = url |
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235 |
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236 self.ui.setconfig(b'phases', b'publish', False, b'unionrepo') |
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237 |
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238 @localrepo.unfilteredpropertycache |
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239 def changelog(self): |
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240 return unionchangelog(self.svfs, self.repo2.svfs) |
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241 |
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242 @localrepo.unfilteredpropertycache |
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243 def manifestlog(self): |
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244 rootstore = unionmanifest( |
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245 self.nodeconstants, |
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246 self.svfs, |
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247 self.repo2.svfs, |
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248 self.unfiltered()._clrev, |
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249 ) |
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250 return manifest.manifestlog( |
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251 self.svfs, self, rootstore, self.narrowmatch() |
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252 ) |
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253 |
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254 def _clrev(self, rev2): |
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255 """map from repo2 changelog rev to temporary rev in self.changelog""" |
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256 node = self.repo2.changelog.node(rev2) |
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257 return self.changelog.rev(node) |
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258 |
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259 def url(self): |
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260 return self._url |
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261 |
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262 def file(self, f): |
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263 return unionfilelog( |
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264 self.svfs, f, self.repo2.svfs, self.unfiltered()._clrev, self |
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265 ) |
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266 |
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267 def close(self): |
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268 self.repo2.close() |
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269 |
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270 def cancopy(self): |
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271 return False |
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272 |
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273 def peer(self, path=None, remotehidden=False): |
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274 return unionpeer(self, path=None, remotehidden=remotehidden) |
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275 |
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276 def getcwd(self): |
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277 return encoding.getcwd() # always outside the repo |
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278 |
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279 |
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280 def instance(ui, path, create, intents=None, createopts=None): |
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281 if create: |
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282 raise error.Abort(_(b'cannot create new union repository')) |
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283 parentpath = ui.config(b"bundle", b"mainreporoot") |
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284 if not parentpath: |
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285 # try to find the correct path to the working directory repo |
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286 parentpath = cmdutil.findrepo(encoding.getcwd()) |
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287 if parentpath is None: |
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288 parentpath = b'' |
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289 if parentpath: |
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290 # Try to make the full path relative so we get a nice, short URL. |
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291 # In particular, we don't want temp dir names in test outputs. |
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292 cwd = encoding.getcwd() |
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293 if parentpath == cwd: |
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294 parentpath = b'' |
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295 else: |
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296 cwd = pathutil.normasprefix(cwd) |
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297 if parentpath.startswith(cwd): |
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298 parentpath = parentpath[len(cwd) :] |
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299 if path.startswith(b'union:'): |
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300 s = path.split(b":", 1)[1].split(b"+", 1) |
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301 if len(s) == 1: |
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302 repopath, repopath2 = parentpath, s[0] |
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303 else: |
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304 repopath, repopath2 = s |
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305 else: |
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306 repopath, repopath2 = parentpath, path |
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307 |
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308 return makeunionrepository(ui, repopath, repopath2) |
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309 |
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310 |
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311 def makeunionrepository(ui, repopath1, repopath2): |
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312 """Make a union repository object from 2 local repo paths.""" |
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313 repo1 = localrepo.instance(ui, repopath1, create=False) |
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314 repo2 = localrepo.instance(ui, repopath2, create=False) |
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315 |
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316 url = b'union:%s+%s' % ( |
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317 util.expandpath(repopath1), |
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318 util.expandpath(repopath2), |
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319 ) |
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320 |
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321 class derivedunionrepository(unionrepository, repo1.__class__): |
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322 pass |
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323 |
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324 repo = repo1 |
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325 repo.__class__ = derivedunionrepository |
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326 unionrepository.__init__(repo1, repo2, url) |
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327 |
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328 return repo |