Mercurial > hg
annotate tests/test-revlog-raw.py @ 51208:274abd1562a2
rust-index: use the rust index in `shortest`
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 02 Aug 2023 16:49:17 +0200 |
parents | 8ed03f773eac |
children | 493034cc3265 |
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1 # test revlog interaction about raw data (flagprocessor) |
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2 |
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3 |
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4 import hashlib |
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5 import sys |
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6 |
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7 from mercurial import ( |
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8 encoding, |
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9 revlog, |
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10 transaction, |
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11 vfs, |
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12 ) |
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13 |
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14 from mercurial.revlogutils import ( |
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15 constants, |
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16 deltas, |
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17 flagutil, |
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18 ) |
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19 |
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20 |
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21 class _NoTransaction: |
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22 """transaction like object to update the nodemap outside a transaction""" |
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23 |
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24 def __init__(self): |
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25 self._postclose = {} |
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26 |
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27 def addpostclose(self, callback_id, callback_func): |
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28 self._postclose[callback_id] = callback_func |
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29 |
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30 def registertmp(self, *args, **kwargs): |
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31 pass |
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32 |
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33 def addbackup(self, *args, **kwargs): |
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34 pass |
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35 |
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36 def add(self, *args, **kwargs): |
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37 pass |
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38 |
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39 def addabort(self, *args, **kwargs): |
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40 pass |
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41 |
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42 def _report(self, *args): |
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43 pass |
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44 |
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45 |
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46 # TESTTMP is optional. This makes it convenient to run without run-tests.py |
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47 tvfs = vfs.vfs(encoding.environ.get(b'TESTTMP', b'/tmp')) |
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48 |
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49 # Enable generaldelta otherwise revlog won't use delta as expected by the test |
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50 tvfs.options = { |
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51 b'generaldelta': True, |
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52 b'revlogv1': True, |
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53 b'delta-config': revlog.DeltaConfig(sparse_revlog=True), |
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54 } |
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55 |
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56 |
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57 def abort(msg): |
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58 print('abort: %s' % msg) |
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59 # Return 0 so run-tests.py could compare the output. |
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60 sys.exit() |
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61 |
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62 |
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63 # Register a revlog processor for flag EXTSTORED. |
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64 # |
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65 # It simply prepends a fixed header, and replaces '1' to 'i'. So it has |
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66 # insertion and replacement, and may be interesting to test revlog's line-based |
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67 # deltas. |
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68 _extheader = b'E\n' |
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69 |
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70 |
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71 def readprocessor(self, rawtext): |
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72 # True: the returned text could be used to verify hash |
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73 text = rawtext[len(_extheader) :].replace(b'i', b'1') |
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74 return text, True |
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75 |
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76 |
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77 def writeprocessor(self, text): |
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78 # False: the returned rawtext shouldn't be used to verify hash |
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79 rawtext = _extheader + text.replace(b'1', b'i') |
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80 return rawtext, False |
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81 |
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82 |
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83 def rawprocessor(self, rawtext): |
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84 # False: do not verify hash. Only the content returned by "readprocessor" |
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85 # can be used to verify hash. |
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86 return False |
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87 |
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88 |
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89 flagutil.addflagprocessor( |
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90 revlog.REVIDX_EXTSTORED, (readprocessor, writeprocessor, rawprocessor) |
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91 ) |
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92 |
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93 # Utilities about reading and appending revlog |
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94 |
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95 |
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96 def newtransaction(): |
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97 # A transaction is required to write revlogs |
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98 report = lambda msg: None |
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99 return transaction.transaction(report, tvfs, {'plain': tvfs}, b'journal') |
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100 |
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101 |
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102 def newrevlog(name=b'_testrevlog', recreate=False): |
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103 if recreate: |
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104 tvfs.tryunlink(name + b'.i') |
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105 target = (constants.KIND_OTHER, b'test') |
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106 rlog = revlog.revlog(tvfs, target=target, radix=name) |
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107 return rlog |
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108 |
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109 |
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110 def appendrev(rlog, text, tr, isext=False, isdelta=True): |
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111 """Append a revision. If isext is True, set the EXTSTORED flag so flag |
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112 processor will be used (and rawtext is different from text). If isdelta is |
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113 True, force the revision to be a delta, otherwise it's full text. |
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114 """ |
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115 nextrev = len(rlog) |
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116 p1 = rlog.node(nextrev - 1) |
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117 p2 = rlog.nullid |
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118 if isext: |
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119 flags = revlog.REVIDX_EXTSTORED |
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120 else: |
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121 flags = revlog.REVIDX_DEFAULT_FLAGS |
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122 # Change storedeltachains temporarily, to override revlog's delta decision |
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123 rlog._storedeltachains = isdelta |
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124 try: |
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125 rlog.addrevision(text, tr, nextrev, p1, p2, flags=flags) |
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126 return nextrev |
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127 except Exception as ex: |
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128 abort('rev %d: failed to append: %s' % (nextrev, ex)) |
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129 finally: |
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130 # Restore storedeltachains. It is always True, see revlog.__init__ |
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131 rlog._storedeltachains = True |
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132 |
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133 |
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134 def addgroupcopy(rlog, tr, destname=b'_destrevlog', optimaldelta=True): |
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135 """Copy revlog to destname using revlog.addgroup. Return the copied revlog. |
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136 |
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137 This emulates push or pull. They use changegroup. Changegroup requires |
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138 repo to work. We don't have a repo, so a dummy changegroup is used. |
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139 |
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140 If optimaldelta is True, use optimized delta parent, so the destination |
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141 revlog could probably reuse it. Otherwise it builds sub-optimal delta, and |
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142 the destination revlog needs more work to use it. |
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143 |
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144 This exercises some revlog.addgroup (and revlog._addrevision(text=None)) |
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145 code path, which is not covered by "appendrev" alone. |
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146 """ |
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147 |
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148 class dummychangegroup: |
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149 @staticmethod |
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150 def deltachunk(pnode): |
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151 pnode = pnode or rlog.nullid |
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152 parentrev = rlog.rev(pnode) |
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153 r = parentrev + 1 |
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154 if r >= len(rlog): |
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155 return {} |
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156 if optimaldelta: |
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157 deltaparent = parentrev |
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158 else: |
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159 # suboptimal deltaparent |
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160 deltaparent = min(0, parentrev) |
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161 if not rlog._candelta(deltaparent, r): |
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162 deltaparent = -1 |
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163 return { |
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164 b'node': rlog.node(r), |
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165 b'p1': pnode, |
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166 b'p2': rlog.nullid, |
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167 b'cs': rlog.node(rlog.linkrev(r)), |
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168 b'flags': rlog.flags(r), |
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169 b'deltabase': rlog.node(deltaparent), |
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170 b'delta': rlog.revdiff(deltaparent, r), |
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171 b'sidedata': rlog.sidedata(r), |
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172 } |
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173 |
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174 def deltaiter(self): |
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175 chain = None |
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176 for chunkdata in iter(lambda: self.deltachunk(chain), {}): |
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177 node = chunkdata[b'node'] |
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178 p1 = chunkdata[b'p1'] |
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179 p2 = chunkdata[b'p2'] |
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180 cs = chunkdata[b'cs'] |
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181 deltabase = chunkdata[b'deltabase'] |
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182 delta = chunkdata[b'delta'] |
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183 flags = chunkdata[b'flags'] |
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184 sidedata = chunkdata[b'sidedata'] |
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185 |
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186 chain = node |
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187 |
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188 yield (node, p1, p2, cs, deltabase, delta, flags, sidedata) |
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189 |
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190 def linkmap(lnode): |
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191 return rlog.rev(lnode) |
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192 |
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193 dlog = newrevlog(destname, recreate=True) |
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194 dummydeltas = dummychangegroup().deltaiter() |
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195 dlog.addgroup(dummydeltas, linkmap, tr) |
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196 return dlog |
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197 |
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198 |
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199 def lowlevelcopy(rlog, tr, destname=b'_destrevlog'): |
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200 """Like addgroupcopy, but use the low level revlog._addrevision directly. |
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201 |
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202 It exercises some code paths that are hard to reach easily otherwise. |
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203 """ |
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204 dlog = newrevlog(destname, recreate=True) |
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205 for r in rlog: |
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206 p1 = rlog.node(r - 1) |
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207 p2 = rlog.nullid |
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208 if r == 0 or (rlog.flags(r) & revlog.REVIDX_EXTSTORED): |
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209 text = rlog.rawdata(r) |
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210 cachedelta = None |
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211 else: |
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212 # deltaparent cannot have EXTSTORED flag. |
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213 deltaparent = max( |
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214 [-1] |
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215 + [ |
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216 p |
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217 for p in range(r) |
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218 if rlog.flags(p) & revlog.REVIDX_EXTSTORED == 0 |
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219 ] |
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220 ) |
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221 text = None |
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222 cachedelta = (deltaparent, rlog.revdiff(deltaparent, r)) |
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223 flags = rlog.flags(r) |
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224 with dlog._writing(_NoTransaction()): |
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225 dlog._addrevision( |
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226 rlog.node(r), |
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227 text, |
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228 tr, |
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229 r, |
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230 p1, |
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231 p2, |
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232 flags, |
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233 cachedelta, |
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234 ) |
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235 return dlog |
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236 |
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237 |
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238 # Utilities to generate revisions for testing |
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239 |
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240 |
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241 def genbits(n): |
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242 """Given a number n, generate (2 ** (n * 2) + 1) numbers in range(2 ** n). |
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243 i.e. the generated numbers have a width of n bits. |
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244 |
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245 The combination of two adjacent numbers will cover all possible cases. |
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246 That is to say, given any x, y where both x, and y are in range(2 ** n), |
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247 there is an x followed immediately by y in the generated sequence. |
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248 """ |
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249 m = 2 ** n |
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250 |
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251 # Gray Code. See https://en.wikipedia.org/wiki/Gray_code |
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252 gray = lambda x: x ^ (x >> 1) |
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253 reversegray = {gray(i): i for i in range(m)} |
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254 |
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255 # Generate (n * 2) bit gray code, yield lower n bits as X, and look for |
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256 # the next unused gray code where higher n bits equal to X. |
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257 |
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258 # For gray codes whose higher bits are X, a[X] of them have been used. |
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259 a = [0] * m |
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260 |
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261 # Iterate from 0. |
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262 x = 0 |
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263 yield x |
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264 for i in range(m * m): |
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265 x = reversegray[x] |
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266 y = gray(a[x] + x * m) & (m - 1) |
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267 assert a[x] < m |
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268 a[x] += 1 |
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269 x = y |
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270 yield x |
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271 |
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272 |
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273 def gentext(rev): |
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274 '''Given a revision number, generate dummy text''' |
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275 return b''.join(b'%d\n' % j for j in range(-1, rev % 5)) |
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276 |
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277 |
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278 def writecases(rlog, tr): |
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279 """Write some revisions interested to the test. |
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280 |
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281 The test is interested in 3 properties of a revision: |
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282 |
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283 - Is it a delta or a full text? (isdelta) |
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284 This is to catch some delta application issues. |
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285 - Does it have a flag of EXTSTORED? (isext) |
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286 This is to catch some flag processor issues. Especially when |
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287 interacted with revlog deltas. |
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288 - Is its text empty? (isempty) |
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289 This is less important. It is intended to try to catch some careless |
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290 checks like "if text" instead of "if text is None". Note: if flag |
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291 processor is involved, raw text may be not empty. |
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292 |
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293 Write 65 revisions. So that all combinations of the above flags for |
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294 adjacent revisions are covered. That is to say, |
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295 |
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296 len(set( |
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297 (r.delta, r.ext, r.empty, (r+1).delta, (r+1).ext, (r+1).empty) |
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298 for r in range(len(rlog) - 1) |
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299 )) is 64. |
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300 |
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301 Where "r.delta", "r.ext", and "r.empty" are booleans matching properties |
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302 mentioned above. |
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303 |
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304 Return expected [(text, rawtext)]. |
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305 """ |
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306 result = [] |
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307 for i, x in enumerate(genbits(3)): |
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308 isdelta, isext, isempty = bool(x & 1), bool(x & 2), bool(x & 4) |
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309 if isempty: |
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310 text = b'' |
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311 else: |
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312 text = gentext(i) |
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313 rev = appendrev(rlog, text, tr, isext=isext, isdelta=isdelta) |
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314 |
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315 # Verify text, rawtext, and rawsize |
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316 if isext: |
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317 rawtext = writeprocessor(None, text)[0] |
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318 else: |
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319 rawtext = text |
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320 if rlog.rawsize(rev) != len(rawtext): |
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321 abort('rev %d: wrong rawsize' % rev) |
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322 if rlog.revision(rev) != text: |
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323 abort('rev %d: wrong text' % rev) |
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324 if rlog.rawdata(rev) != rawtext: |
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325 abort('rev %d: wrong rawtext' % rev) |
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326 result.append((text, rawtext)) |
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327 |
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328 # Verify flags like isdelta, isext work as expected |
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329 # isdelta can be overridden to False if this or p1 has isext set |
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330 if bool(rlog.deltaparent(rev) > -1) and not isdelta: |
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331 abort('rev %d: isdelta is unexpected' % rev) |
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332 if bool(rlog.flags(rev)) != isext: |
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333 abort('rev %d: isext is ineffective' % rev) |
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334 return result |
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335 |
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336 |
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337 # Main test and checking |
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338 |
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339 |
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340 def checkrevlog(rlog, expected): |
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341 '''Check if revlog has expected contents. expected is [(text, rawtext)]''' |
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342 # Test using different access orders. This could expose some issues |
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343 # depending on revlog caching (see revlog._cache). |
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344 for r0 in range(len(rlog) - 1): |
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345 r1 = r0 + 1 |
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346 for revorder in [[r0, r1], [r1, r0]]: |
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347 for raworder in [[True], [False], [True, False], [False, True]]: |
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348 nlog = newrevlog() |
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349 for rev in revorder: |
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350 for raw in raworder: |
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351 if raw: |
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352 t = nlog.rawdata(rev) |
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353 else: |
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354 t = nlog.revision(rev) |
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355 if t != expected[rev][int(raw)]: |
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356 abort( |
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357 'rev %d: corrupted %stext' |
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358 % (rev, raw and 'raw' or '') |
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359 ) |
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360 |
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361 |
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362 slicingdata = [ |
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363 ([0, 1, 2, 3, 55, 56, 58, 59, 60], [[0, 1], [2], [58], [59, 60]], 10), |
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364 ([0, 1, 2, 3, 55, 56, 58, 59, 60], [[0, 1], [2], [58], [59, 60]], 10), |
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365 ( |
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366 [-1, 0, 1, 2, 3, 55, 56, 58, 59, 60], |
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367 [[-1, 0, 1], [2], [58], [59, 60]], |
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368 10, |
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369 ), |
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370 ] |
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371 |
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372 |
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373 def slicingtest(rlog): |
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374 old_delta_config = rlog.delta_config |
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375 old_data_config = rlog.data_config |
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376 rlog.delta_config = rlog.delta_config.copy() |
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377 rlog.data_config = rlog.data_config.copy() |
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378 try: |
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379 # the test revlog is small, we remove the floor under which we |
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380 # slicing is diregarded. |
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381 rlog.data_config.sr_min_gap_size = 0 |
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382 rlog.delta_config.sr_min_gap_size = 0 |
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383 for item in slicingdata: |
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384 chain, expected, target = item |
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385 result = deltas.slicechunk(rlog, chain, targetsize=target) |
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386 result = list(result) |
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387 if result != expected: |
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388 print('slicing differ:') |
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389 print(' chain: %s' % chain) |
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390 print(' target: %s' % target) |
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391 print(' expected: %s' % expected) |
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392 print(' result: %s' % result) |
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393 finally: |
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394 rlog.delta_config = old_delta_config |
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395 rlog.data_config = old_data_config |
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396 |
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397 |
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398 def md5sum(s): |
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399 return hashlib.md5(s).digest() |
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400 |
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401 |
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402 def _maketext(*coord): |
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403 """create piece of text according to range of integers |
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404 |
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405 The test returned use a md5sum of the integer to make it less |
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406 compressible""" |
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407 pieces = [] |
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408 for start, size in coord: |
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409 num = range(start, start + size) |
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410 p = [md5sum(b'%d' % r) for r in num] |
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411 pieces.append(b'\n'.join(p)) |
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412 return b'\n'.join(pieces) + b'\n' |
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413 |
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414 |
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415 data = [ |
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416 _maketext((0, 120), (456, 60)), |
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417 _maketext((0, 120), (345, 60)), |
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418 _maketext((0, 120), (734, 60)), |
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419 _maketext((0, 120), (734, 60), (923, 45)), |
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420 _maketext((0, 120), (734, 60), (234, 45)), |
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421 _maketext((0, 120), (734, 60), (564, 45)), |
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422 _maketext((0, 120), (734, 60), (361, 45)), |
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423 _maketext((0, 120), (734, 60), (489, 45)), |
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424 _maketext((0, 120), (123, 60)), |
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425 _maketext((0, 120), (145, 60)), |
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426 _maketext((0, 120), (104, 60)), |
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427 _maketext((0, 120), (430, 60)), |
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428 _maketext((0, 120), (430, 60), (923, 45)), |
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429 _maketext((0, 120), (430, 60), (234, 45)), |
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430 _maketext((0, 120), (430, 60), (564, 45)), |
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431 _maketext((0, 120), (430, 60), (361, 45)), |
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432 _maketext((0, 120), (430, 60), (489, 45)), |
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433 _maketext((0, 120), (249, 60)), |
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434 _maketext((0, 120), (832, 60)), |
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435 _maketext((0, 120), (891, 60)), |
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436 _maketext((0, 120), (543, 60)), |
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437 _maketext((0, 120), (120, 60)), |
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438 _maketext((0, 120), (60, 60), (768, 30)), |
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439 _maketext((0, 120), (60, 60), (260, 30)), |
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440 _maketext((0, 120), (60, 60), (450, 30)), |
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441 _maketext((0, 120), (60, 60), (361, 30)), |
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442 _maketext((0, 120), (60, 60), (886, 30)), |
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443 _maketext((0, 120), (60, 60), (116, 30)), |
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444 _maketext((0, 120), (60, 60), (567, 30), (629, 40)), |
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445 _maketext((0, 120), (60, 60), (569, 30), (745, 40)), |
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446 _maketext((0, 120), (60, 60), (777, 30), (700, 40)), |
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447 _maketext((0, 120), (60, 60), (618, 30), (398, 40), (158, 10)), |
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448 ] |
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449 |
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450 |
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451 def makesnapshot(tr): |
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452 rl = newrevlog(name=b'_snaprevlog3', recreate=True) |
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453 for i in data: |
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454 appendrev(rl, i, tr) |
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455 return rl |
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456 |
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457 |
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458 snapshots = [-1, 0, 6, 8, 11, 17, 19, 21, 25, 30] |
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459 |
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460 |
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461 def issnapshottest(rlog): |
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462 result = [] |
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463 if rlog.issnapshot(-1): |
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464 result.append(-1) |
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465 for rev in rlog: |
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466 if rlog.issnapshot(rev): |
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467 result.append(rev) |
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468 if snapshots != result: |
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469 print('snapshot differ:') |
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470 print(' expected: %s' % snapshots) |
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471 print(' got: %s' % result) |
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472 |
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473 |
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474 snapshotmapall = {0: {6, 8, 11, 17, 19, 25}, 8: {21}, -1: {0, 30}} |
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475 snapshotmap15 = {0: {17, 19, 25}, 8: {21}, -1: {30}} |
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476 |
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477 |
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478 def findsnapshottest(rlog): |
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479 cache = deltas.SnapshotCache() |
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480 cache.update(rlog) |
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481 resultall = dict(cache.snapshots) |
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482 if resultall != snapshotmapall: |
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483 print('snapshot map differ:') |
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484 print(' expected: %s' % snapshotmapall) |
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485 print(' got: %s' % resultall) |
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486 cache15 = deltas.SnapshotCache() |
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487 cache15.update(rlog, 15) |
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488 result15 = dict(cache15.snapshots) |
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489 if result15 != snapshotmap15: |
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490 print('snapshot map differ:') |
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491 print(' expected: %s' % snapshotmap15) |
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492 print(' got: %s' % result15) |
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493 |
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494 |
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495 def maintest(): |
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496 with newtransaction() as tr: |
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497 rl = newrevlog(recreate=True) |
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498 expected = writecases(rl, tr) |
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499 checkrevlog(rl, expected) |
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500 print('local test passed') |
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501 # Copy via revlog.addgroup |
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502 rl1 = addgroupcopy(rl, tr) |
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503 checkrevlog(rl1, expected) |
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504 rl2 = addgroupcopy(rl, tr, optimaldelta=False) |
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505 checkrevlog(rl2, expected) |
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506 print('addgroupcopy test passed') |
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507 # Copy via revlog.clone |
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508 rl3 = newrevlog(name=b'_destrevlog3', recreate=True) |
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509 rl.clone(tr, rl3) |
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510 checkrevlog(rl3, expected) |
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511 print('clone test passed') |
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512 # Copy via low-level revlog._addrevision |
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513 rl4 = lowlevelcopy(rl, tr) |
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514 checkrevlog(rl4, expected) |
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515 print('lowlevelcopy test passed') |
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516 slicingtest(rl) |
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517 print('slicing test passed') |
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518 rl5 = makesnapshot(tr) |
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519 issnapshottest(rl5) |
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520 print('issnapshot test passed') |
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521 findsnapshottest(rl5) |
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522 print('findsnapshot test passed') |
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523 |
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524 |
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525 try: |
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526 maintest() |
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527 except Exception as ex: |
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528 abort('crashed: %s' % ex) |