Mercurial > public > mercurial-scm > hg-stable
annotate mercurial/streamclone.py @ 52719:6feb3b3029b5
stream: consistently close progress before reporting time
Seems more logical.
We also take this as an opportunity to explicitly track bytes count in "v2" as
relying on progress internal start is error prone.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 28 Nov 2024 11:05:07 +0100 |
parents | 061bfd699a56 |
children | ca17d31624ac |
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1 # streamclone.py - producing and consuming streaming repository data |
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2 # |
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3 # Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import annotations |
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9 |
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10 import contextlib |
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11 import errno |
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12 import os |
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13 import struct |
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14 |
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15 from typing import Iterable, Iterator, Optional, Set |
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16 |
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17 from .i18n import _ |
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18 from .interfaces import repository |
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19 from . import ( |
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20 bookmarks, |
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21 bundle2 as bundle2mod, |
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22 cacheutil, |
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23 error, |
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24 narrowspec, |
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25 phases, |
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26 pycompat, |
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27 requirements as requirementsmod, |
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28 scmutil, |
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29 store, |
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30 transaction, |
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31 util, |
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32 ) |
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33 from .revlogutils import ( |
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34 nodemap, |
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35 ) |
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36 |
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37 |
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38 def new_stream_clone_requirements( |
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39 default_requirements: Iterable[bytes], |
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40 streamed_requirements: Iterable[bytes], |
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41 ) -> Set[bytes]: |
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42 """determine the final set of requirement for a new stream clone |
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43 |
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44 this method combine the "default" requirements that a new repository would |
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45 use with the constaint we get from the stream clone content. We keep local |
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46 configuration choice when possible. |
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47 """ |
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48 requirements = set(default_requirements) |
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49 requirements -= requirementsmod.STREAM_FIXED_REQUIREMENTS |
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50 requirements.update(streamed_requirements) |
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51 return requirements |
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52 |
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53 |
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54 def streamed_requirements(repo) -> Set[bytes]: |
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55 """the set of requirement the new clone will have to support |
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56 |
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57 This is used for advertising the stream options and to generate the actual |
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58 stream content.""" |
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59 requiredformats = ( |
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60 repo.requirements & requirementsmod.STREAM_FIXED_REQUIREMENTS |
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61 ) |
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62 return requiredformats |
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63 |
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64 |
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65 def canperformstreamclone(pullop, bundle2: bool = False): |
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66 """Whether it is possible to perform a streaming clone as part of pull. |
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67 |
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68 ``bundle2`` will cause the function to consider stream clone through |
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69 bundle2 and only through bundle2. |
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70 |
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71 Returns a tuple of (supported, requirements). ``supported`` is True if |
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72 streaming clone is supported and False otherwise. ``requirements`` is |
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73 a set of repo requirements from the remote, or ``None`` if stream clone |
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74 isn't supported. |
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75 """ |
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76 repo = pullop.repo |
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77 remote = pullop.remote |
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78 |
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79 # should we consider streaming clone at all ? |
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80 streamrequested = pullop.streamclonerequested |
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81 # If we don't have a preference, let the server decide for us. This |
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82 # likely only comes into play in LANs. |
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83 if streamrequested is None: |
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84 # The server can advertise whether to prefer streaming clone. |
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85 streamrequested = remote.capable(b'stream-preferred') |
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86 if not streamrequested: |
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87 return False, None |
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88 |
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89 # Streaming clone only works on an empty destination repository |
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90 if len(repo): |
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91 return False, None |
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92 |
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93 # Streaming clone only works if all data is being requested. |
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94 if pullop.heads: |
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95 return False, None |
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96 |
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97 bundle2supported = False |
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98 if pullop.canusebundle2: |
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99 local_caps = bundle2mod.getrepocaps(repo, role=b'client') |
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100 local_supported = set(local_caps.get(b'stream', [])) |
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101 remote_supported = set(pullop.remotebundle2caps.get(b'stream', [])) |
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102 bundle2supported = bool(local_supported & remote_supported) |
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103 # else |
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104 # Server doesn't support bundle2 stream clone or doesn't support |
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105 # the versions we support. Fall back and possibly allow legacy. |
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106 |
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107 # Ensures legacy code path uses available bundle2. |
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108 if bundle2supported and not bundle2: |
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109 return False, None |
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110 # Ensures bundle2 doesn't try to do a stream clone if it isn't supported. |
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111 elif bundle2 and not bundle2supported: |
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112 return False, None |
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113 |
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114 # In order for stream clone to work, the client has to support all the |
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115 # requirements advertised by the server. |
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116 # |
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117 # The server advertises its requirements via the "stream" and "streamreqs" |
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118 # capability. "stream" (a value-less capability) is advertised if and only |
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119 # if the only requirement is "revlogv1." Else, the "streamreqs" capability |
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120 # is advertised and contains a comma-delimited list of requirements. |
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121 requirements = set() |
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122 if remote.capable(b'stream'): |
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123 requirements.add(requirementsmod.REVLOGV1_REQUIREMENT) |
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124 else: |
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125 streamreqs = remote.capable(b'streamreqs') |
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126 # This is weird and shouldn't happen with modern servers. |
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127 if not streamreqs: |
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128 pullop.repo.ui.warn( |
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129 _( |
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130 b'warning: stream clone requested but server has them ' |
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131 b'disabled\n' |
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132 ) |
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133 ) |
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134 return False, None |
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135 |
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136 streamreqs = set(streamreqs.split(b',')) |
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137 # Server requires something we don't support. Bail. |
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138 missingreqs = streamreqs - repo.supported |
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139 if missingreqs: |
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140 pullop.repo.ui.warn( |
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141 _( |
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142 b'warning: stream clone requested but client is missing ' |
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143 b'requirements: %s\n' |
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144 ) |
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145 % b', '.join(sorted(missingreqs)) |
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146 ) |
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147 pullop.repo.ui.warn( |
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148 _( |
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149 b'(see https://www.mercurial-scm.org/wiki/MissingRequirement ' |
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150 b'for more information)\n' |
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151 ) |
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152 ) |
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153 return False, None |
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154 requirements = streamreqs |
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155 |
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156 return True, requirements |
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157 |
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158 |
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159 def maybeperformlegacystreamclone(pullop) -> None: |
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160 """Possibly perform a legacy stream clone operation. |
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161 |
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162 Legacy stream clones are performed as part of pull but before all other |
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163 operations. |
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164 |
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165 A legacy stream clone will not be performed if a bundle2 stream clone is |
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166 supported. |
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167 """ |
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168 from . import localrepo |
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169 |
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170 supported, requirements = canperformstreamclone(pullop) |
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171 |
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172 if not supported: |
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173 return |
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174 |
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175 repo = pullop.repo |
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176 remote = pullop.remote |
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177 |
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178 # Save remote branchmap. We will use it later to speed up branchcache |
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179 # creation. |
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180 rbranchmap = None |
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181 if remote.capable(b'branchmap'): |
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182 with remote.commandexecutor() as e: |
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183 rbranchmap = e.callcommand(b'branchmap', {}).result() |
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184 |
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185 repo.ui.status(_(b'streaming all changes\n')) |
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186 |
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187 with remote.commandexecutor() as e: |
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188 fp = e.callcommand(b'stream_out', {}).result() |
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189 |
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190 # TODO strictly speaking, this code should all be inside the context |
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191 # manager because the context manager is supposed to ensure all wire state |
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192 # is flushed when exiting. But the legacy peers don't do this, so it |
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193 # doesn't matter. |
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194 l = fp.readline() |
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195 try: |
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196 resp = int(l) |
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197 except ValueError: |
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198 raise error.ResponseError( |
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199 _(b'unexpected response from remote server:'), l |
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200 ) |
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201 if resp == 1: |
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202 raise error.Abort(_(b'operation forbidden by server')) |
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203 elif resp == 2: |
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204 raise error.Abort(_(b'locking the remote repository failed')) |
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205 elif resp != 0: |
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206 raise error.Abort(_(b'the server sent an unknown error code')) |
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207 |
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208 l = fp.readline() |
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209 try: |
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210 filecount, bytecount = map(int, l.split(b' ', 1)) |
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211 except (ValueError, TypeError): |
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212 raise error.ResponseError( |
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213 _(b'unexpected response from remote server:'), l |
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214 ) |
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215 |
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216 with repo.lock(): |
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217 consumev1(repo, fp, filecount, bytecount) |
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218 repo.requirements = new_stream_clone_requirements( |
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219 repo.requirements, |
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220 requirements, |
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221 ) |
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222 repo.svfs.options = localrepo.resolvestorevfsoptions( |
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223 repo.ui, repo.requirements, repo.features |
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224 ) |
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225 scmutil.writereporequirements(repo) |
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226 nodemap.post_stream_cleanup(repo) |
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227 |
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228 if rbranchmap: |
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229 repo._branchcaches.replace(repo, rbranchmap) |
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230 |
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231 repo.invalidate() |
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232 |
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233 |
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234 def allowservergeneration(repo) -> bool: |
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235 """Whether streaming clones are allowed from the server.""" |
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236 if repository.REPO_FEATURE_STREAM_CLONE not in repo.features: |
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237 return False |
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238 |
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239 if not repo.ui.configbool(b'server', b'uncompressed', untrusted=True): |
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240 return False |
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241 |
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242 # The way stream clone works makes it impossible to hide secret changesets. |
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243 # So don't allow this by default. |
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244 secret = phases.hassecret(repo) |
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245 if secret: |
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246 return repo.ui.configbool(b'server', b'uncompressedallowsecret') |
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247 |
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248 return True |
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249 |
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250 |
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251 # This is it's own function so extensions can override it. |
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252 def _walkstreamfiles( |
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253 repo, matcher=None, phase: bool = False, obsolescence: bool = False |
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254 ): |
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255 return repo.store.walk(matcher, phase=phase, obsolescence=obsolescence) |
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256 |
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257 |
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258 def _report_transferred(repo, start_time: float, byte_count: int): |
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259 """common utility to report time it took to download the stream bundle""" |
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260 elapsed = util.timer() - start_time |
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261 if elapsed <= 0: |
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262 elapsed = 0.001 |
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263 m = _(b'transferred %s in %.1f seconds (%s/sec)\n') |
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264 m %= ( |
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265 util.bytecount(byte_count), |
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266 elapsed, |
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267 util.bytecount(byte_count / elapsed), |
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268 ) |
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269 repo.ui.status(m) |
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270 |
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271 |
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272 def generatev1(repo) -> tuple[int, int, Iterator[bytes]]: |
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273 """Emit content for version 1 of a streaming clone. |
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274 |
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275 This returns a 3-tuple of (file count, byte size, data iterator). |
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276 |
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277 The data iterator consists of N entries for each file being transferred. |
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278 Each file entry starts as a line with the file name and integer size |
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279 delimited by a null byte. |
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280 |
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281 The raw file data follows. Following the raw file data is the next file |
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282 entry, or EOF. |
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283 |
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284 When used on the wire protocol, an additional line indicating protocol |
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285 success will be prepended to the stream. This function is not responsible |
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286 for adding it. |
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287 |
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288 This function will obtain a repository lock to ensure a consistent view of |
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289 the store is captured. It therefore may raise LockError. |
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290 """ |
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291 entries = [] |
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292 total_bytes = 0 |
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293 # Get consistent snapshot of repo, lock during scan. |
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294 with repo.lock(): |
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295 repo.ui.debug(b'scanning\n') |
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296 _test_sync_point_walk_1_2(repo) |
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297 for entry in _walkstreamfiles(repo): |
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298 for f in entry.files(): |
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299 file_size = f.file_size(repo.store.vfs) |
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300 if file_size: |
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301 entries.append((f.unencoded_path, file_size)) |
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302 total_bytes += file_size |
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303 _test_sync_point_walk_3(repo) |
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304 _test_sync_point_walk_4(repo) |
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305 |
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306 repo.ui.debug( |
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307 b'%d files, %d bytes to transfer\n' % (len(entries), total_bytes) |
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308 ) |
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309 |
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310 svfs = repo.svfs |
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311 debugflag = repo.ui.debugflag |
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312 |
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313 def emitrevlogdata() -> Iterator[bytes]: |
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314 for name, size in entries: |
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315 if debugflag: |
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316 repo.ui.debug(b'sending %s (%d bytes)\n' % (name, size)) |
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317 # partially encode name over the wire for backwards compat |
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318 yield b'%s\0%d\n' % (store.encodedir(name), size) |
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319 # auditing at this stage is both pointless (paths are already |
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320 # trusted by the local repo) and expensive |
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321 with svfs(name, b'rb', auditpath=False) as fp: |
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322 if size <= 65536: |
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323 yield fp.read(size) |
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324 else: |
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325 yield from util.filechunkiter(fp, limit=size) |
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326 |
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327 return len(entries), total_bytes, emitrevlogdata() |
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328 |
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329 |
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330 def generatev1wireproto(repo) -> Iterator[bytes]: |
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331 """Emit content for version 1 of streaming clone suitable for the wire. |
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332 |
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333 This is the data output from ``generatev1()`` with 2 header lines. The |
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334 first line indicates overall success. The 2nd contains the file count and |
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335 byte size of payload. |
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336 |
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337 The success line contains "0" for success, "1" for stream generation not |
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338 allowed, and "2" for error locking the repository (possibly indicating |
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339 a permissions error for the server process). |
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340 """ |
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341 if not allowservergeneration(repo): |
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342 yield b'1\n' |
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343 return |
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344 |
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345 try: |
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346 filecount, bytecount, it = generatev1(repo) |
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347 except error.LockError: |
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348 yield b'2\n' |
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349 return |
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350 |
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351 # Indicates successful response. |
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352 yield b'0\n' |
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353 yield b'%d %d\n' % (filecount, bytecount) |
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354 yield from it |
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355 |
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356 |
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357 def generatebundlev1( |
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358 repo, compression: bytes = b'UN' |
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359 ) -> tuple[Set[bytes], Iterator[bytes]]: |
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360 """Emit content for version 1 of a stream clone bundle. |
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361 |
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362 The first 4 bytes of the output ("HGS1") denote this as stream clone |
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363 bundle version 1. |
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364 |
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365 The next 2 bytes indicate the compression type. Only "UN" is currently |
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366 supported. |
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367 |
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368 The next 16 bytes are two 64-bit big endian unsigned integers indicating |
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369 file count and byte count, respectively. |
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370 |
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371 The next 2 bytes is a 16-bit big endian unsigned short declaring the length |
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372 of the requirements string, including a trailing \0. The following N bytes |
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373 are the requirements string, which is ASCII containing a comma-delimited |
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374 list of repo requirements that are needed to support the data. |
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375 |
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376 The remaining content is the output of ``generatev1()`` (which may be |
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377 compressed in the future). |
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378 |
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379 Returns a tuple of (requirements, data generator). |
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380 """ |
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381 if compression != b'UN': |
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382 raise ValueError('we do not support the compression argument yet') |
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383 |
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384 requirements = streamed_requirements(repo) |
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385 requires = b','.join(sorted(requirements)) |
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386 |
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387 def gen() -> Iterator[bytes]: |
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388 yield b'HGS1' |
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389 yield compression |
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390 |
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391 filecount, bytecount, it = generatev1(repo) |
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392 repo.ui.status( |
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393 _(b'writing %d bytes for %d files\n') % (bytecount, filecount) |
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394 ) |
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395 |
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396 yield struct.pack(b'>QQ', filecount, bytecount) |
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397 yield struct.pack(b'>H', len(requires) + 1) |
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398 yield requires + b'\0' |
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399 |
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400 # This is where we'll add compression in the future. |
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401 assert compression == b'UN' |
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402 |
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403 progress = repo.ui.makeprogress( |
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404 _(b'bundle'), total=bytecount, unit=_(b'bytes') |
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405 ) |
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406 progress.update(0) |
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407 |
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408 for chunk in it: |
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409 progress.increment(step=len(chunk)) |
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410 yield chunk |
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411 |
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412 progress.complete() |
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413 |
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414 return requirements, gen() |
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415 |
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416 |
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417 def consumev1(repo, fp, filecount: int, bytecount: int) -> None: |
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418 """Apply the contents from version 1 of a streaming clone file handle. |
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419 |
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420 This takes the output from "stream_out" and applies it to the specified |
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421 repository. |
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422 |
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423 Like "stream_out," the status line added by the wire protocol is not |
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424 handled by this function. |
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425 """ |
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426 with repo.lock(): |
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427 repo.ui.status( |
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428 _(b'%d files to transfer, %s of data\n') |
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429 % (filecount, util.bytecount(bytecount)) |
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430 ) |
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431 progress = repo.ui.makeprogress( |
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432 _(b'clone'), total=bytecount, unit=_(b'bytes') |
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433 ) |
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434 progress.update(0) |
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435 start = util.timer() |
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436 |
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437 # TODO: get rid of (potential) inconsistency |
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438 # |
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439 # If transaction is started and any @filecache property is |
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440 # changed at this point, it causes inconsistency between |
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441 # in-memory cached property and streamclone-ed file on the |
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442 # disk. Nested transaction prevents transaction scope "clone" |
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443 # below from writing in-memory changes out at the end of it, |
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444 # even though in-memory changes are discarded at the end of it |
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445 # regardless of transaction nesting. |
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446 # |
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447 # But transaction nesting can't be simply prohibited, because |
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448 # nesting occurs also in ordinary case (e.g. enabling |
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449 # clonebundles). |
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450 |
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451 with repo.transaction(b'clone'): |
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452 with repo.svfs.backgroundclosing(repo.ui, expectedcount=filecount): |
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453 for i in range(filecount): |
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454 # XXX doesn't support '\n' or '\r' in filenames |
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455 if hasattr(fp, 'readline'): |
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456 l = fp.readline() |
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457 else: |
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458 # inline clonebundles use a chunkbuffer, so no readline |
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459 # --> this should be small anyway, the first line |
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460 # only contains the size of the bundle |
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461 l_buf = [] |
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462 while not (l_buf and l_buf[-1] == b'\n'): |
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463 l_buf.append(fp.read(1)) |
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464 l = b''.join(l_buf) |
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465 try: |
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466 name, size = l.split(b'\0', 1) |
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467 size = int(size) |
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468 except (ValueError, TypeError): |
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469 raise error.ResponseError( |
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470 _(b'unexpected response from remote server:'), l |
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471 ) |
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472 if repo.ui.debugflag: |
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473 repo.ui.debug( |
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474 b'adding %s (%s)\n' % (name, util.bytecount(size)) |
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475 ) |
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476 # for backwards compat, name was partially encoded |
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477 path = store.decodedir(name) |
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478 with repo.svfs(path, b'w', backgroundclose=True) as ofp: |
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479 for chunk in util.filechunkiter(fp, limit=size): |
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480 progress.increment(step=len(chunk)) |
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481 ofp.write(chunk) |
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482 |
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483 # force @filecache properties to be reloaded from |
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484 # streamclone-ed file at next access |
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485 repo.invalidate(clearfilecache=True) |
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486 |
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487 progress.complete() |
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488 _report_transferred(repo, start, bytecount) |
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489 |
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490 |
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491 def readbundle1header(fp) -> tuple[int, int, Set[bytes]]: |
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492 compression = fp.read(2) |
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493 if compression != b'UN': |
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494 raise error.Abort( |
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495 _( |
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496 b'only uncompressed stream clone bundles are ' |
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497 b'supported; got %s' |
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498 ) |
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499 % compression |
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500 ) |
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501 |
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502 filecount, bytecount = struct.unpack(b'>QQ', fp.read(16)) |
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503 requireslen = struct.unpack(b'>H', fp.read(2))[0] |
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504 requires = fp.read(requireslen) |
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505 |
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506 if not requires.endswith(b'\0'): |
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507 raise error.Abort( |
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508 _( |
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509 b'malformed stream clone bundle: ' |
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510 b'requirements not properly encoded' |
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511 ) |
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512 ) |
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513 |
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514 requirements = set(requires.rstrip(b'\0').split(b',')) |
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515 |
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516 return filecount, bytecount, requirements |
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517 |
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518 |
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519 def applybundlev1(repo, fp) -> None: |
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520 """Apply the content from a stream clone bundle version 1. |
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521 |
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522 We assume the 4 byte header has been read and validated and the file handle |
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523 is at the 2 byte compression identifier. |
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524 """ |
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525 if len(repo): |
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526 raise error.Abort( |
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527 _(b'cannot apply stream clone bundle on non-empty repo') |
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528 ) |
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529 |
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530 filecount, bytecount, requirements = readbundle1header(fp) |
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531 missingreqs = requirements - repo.supported |
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532 if missingreqs: |
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533 raise error.Abort( |
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534 _(b'unable to apply stream clone: unsupported format: %s') |
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535 % b', '.join(sorted(missingreqs)) |
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536 ) |
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537 |
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538 consumev1(repo, fp, filecount, bytecount) |
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539 nodemap.post_stream_cleanup(repo) |
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540 |
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541 |
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542 class streamcloneapplier: |
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543 """Class to manage applying streaming clone bundles. |
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544 |
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545 We need to wrap ``applybundlev1()`` in a dedicated type to enable bundle |
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546 readers to perform bundle type-specific functionality. |
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547 """ |
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548 |
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549 def __init__(self, fh) -> None: |
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550 self._fh = fh |
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551 |
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552 def apply(self, repo) -> None: |
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553 return applybundlev1(repo, self._fh) |
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554 |
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555 |
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556 # type of file to stream |
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557 _fileappend = 0 # append only file |
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558 _filefull = 1 # full snapshot file |
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559 |
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560 # Source of the file |
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561 _srcstore = b's' # store (svfs) |
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562 _srccache = b'c' # cache (cache) |
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563 |
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564 |
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565 # This is it's own function so extensions can override it. |
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566 def _walkstreamfullstorefiles(repo) -> list[bytes]: |
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567 """list snapshot file from the store""" |
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568 fnames = [] |
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569 if not repo.publishing(): |
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570 fnames.append(b'phaseroots') |
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571 return fnames |
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572 |
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573 |
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574 def _filterfull(entry, copy, vfsmap): |
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575 """actually copy the snapshot files""" |
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576 src, name, ftype, data = entry |
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577 if ftype != _filefull: |
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578 return entry |
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579 return (src, name, ftype, copy(vfsmap[src].join(name))) |
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580 |
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581 |
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582 class VolatileManager: |
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583 """Manage temporary backups of volatile files during stream clone. |
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584 |
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585 This class will keep open file handles for the volatile files, writing the |
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586 smaller ones on disk if the number of open file handles grow too much. |
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587 |
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588 This should be used as a Python context, the file handles and copies will |
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589 be discarded when exiting the context. |
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590 |
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591 The preservation can be done by calling the object on the real path |
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592 (encoded full path). |
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593 |
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594 Valid filehandles for any file should be retrieved by calling `open(path)`. |
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595 """ |
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596 |
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597 # arbitrarily picked as "it seemed fine" and much higher than the current |
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598 # usage. The Windows value of 2 is actually 1 file open at a time, due to |
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599 # the `flush_count = self.MAX_OPEN // 2` and `self.MAX_OPEN - 1` threshold |
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600 # for flushing to disk in __call__(). |
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601 MAX_OPEN = 2 if pycompat.iswindows else 100 |
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602 |
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603 def __init__(self) -> None: |
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604 self._counter = 0 |
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605 self._volatile_fps = None |
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606 self._copies = None |
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607 self._dst_dir = None |
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608 |
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609 def __enter__(self): |
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610 if self._counter == 0: |
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611 assert self._volatile_fps is None |
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612 self._volatile_fps = {} |
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613 self._counter += 1 |
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614 return self |
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615 |
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616 def __exit__(self, *args, **kwars): |
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617 """discard all backups""" |
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618 self._counter -= 1 |
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619 if self._counter == 0: |
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620 for _size, fp in self._volatile_fps.values(): |
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621 fp.close() |
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622 self._volatile_fps = None |
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623 if self._copies is not None: |
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624 for tmp in self._copies.values(): |
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625 util.tryunlink(tmp) |
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626 util.tryrmdir(self._dst_dir) |
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627 self._copies = None |
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628 self._dst_dir = None |
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629 assert self._volatile_fps is None |
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630 assert self._copies is None |
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631 assert self._dst_dir is None |
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632 |
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633 def _init_tmp_copies(self) -> None: |
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634 """prepare a temporary directory to save volatile files |
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635 |
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636 This will be used as backup if we have too many files open""" |
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637 assert 0 < self._counter |
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638 assert self._copies is None |
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639 assert self._dst_dir is None |
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640 self._copies = {} |
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641 self._dst_dir = pycompat.mkdtemp(prefix=b'hg-clone-') |
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642 |
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643 def _flush_some_on_disk(self) -> None: |
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644 """move some of the open files to tempory files on disk""" |
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645 if self._copies is None: |
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646 self._init_tmp_copies() |
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647 flush_count = self.MAX_OPEN // 2 |
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648 for src, (size, fp) in sorted(self._volatile_fps.items())[:flush_count]: |
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649 prefix = os.path.basename(src) |
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650 fd, dst = pycompat.mkstemp(prefix=prefix, dir=self._dst_dir) |
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651 self._copies[src] = dst |
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652 os.close(fd) |
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653 # we no longer hardlink, but on the other hand we rarely do this, |
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654 # and we do it for the smallest file only and not at all in the |
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655 # common case. |
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656 with open(dst, 'wb') as bck: |
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657 fp.seek(0) |
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658 bck.write(fp.read()) |
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659 del self._volatile_fps[src] |
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660 fp.close() |
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661 |
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662 def _keep_one(self, src: bytes) -> int: |
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663 """preserve an open file handle for a given path""" |
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664 # store the file quickly to ensure we close it if any error happens |
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665 _, fp = self._volatile_fps[src] = (None, open(src, 'rb')) |
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666 fp.seek(0, os.SEEK_END) |
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667 size = fp.tell() |
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668 self._volatile_fps[src] = (size, fp) |
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669 return size |
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670 |
52713
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671 def __call__(self, src: bytes) -> None: |
52046
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672 """preserve the volatile file at src""" |
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673 assert 0 < self._counter |
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674 if len(self._volatile_fps) >= (self.MAX_OPEN - 1): |
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675 self._flush_some_on_disk() |
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676 self._keep_one(src) |
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677 |
52713
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678 def try_keep(self, src: bytes) -> Optional[int]: |
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679 """record a volatile file and returns it size |
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680 |
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681 return None if the file does not exists. |
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682 |
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683 Used for cache file that are not lock protected. |
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684 """ |
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685 assert 0 < self._counter |
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686 if len(self._volatile_fps) >= (self.MAX_OPEN - 1): |
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687 self._flush_some_on_disk() |
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688 try: |
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|
689 return self._keep_one(src) |
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Matt Harbison <matt_harbison@yahoo.com>
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690 except OSError as err: |
52391
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691 if err.errno not in (errno.ENOENT, errno.EPERM): |
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692 raise |
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693 return None |
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|
694 |
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52043
diff
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|
695 @contextlib.contextmanager |
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|
696 def open(self, src): |
52046
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697 assert 0 < self._counter |
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698 entry = self._volatile_fps.get(src) |
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699 if entry is not None: |
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700 _size, fp = entry |
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701 fp.seek(0) |
52044
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|
702 yield fp |
52046
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703 else: |
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|
704 if self._copies is None: |
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diff
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|
705 actual_path = src |
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|
706 else: |
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diff
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|
707 actual_path = self._copies.get(src, src) |
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diff
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|
708 with open(actual_path, 'rb') as fp: |
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diff
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|
709 yield fp |
35765
56c30b31afbe
streamclone: add support for cloning non append-only file
Boris Feld <boris.feld@octobus.net>
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diff
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|
710 |
43076
2372284d9457
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parents:
42823
diff
changeset
|
711 |
35767
5f5fb279fd39
streamclone: also stream caches to the client
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35765
diff
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|
712 def _makemap(repo): |
5f5fb279fd39
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parents:
35765
diff
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|
713 """make a (src -> vfs) map for the repo""" |
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diff
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|
714 vfsmap = { |
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diff
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|
715 _srcstore: repo.svfs, |
5f5fb279fd39
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35765
diff
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|
716 _srccache: repo.cachevfs, |
5f5fb279fd39
streamclone: also stream caches to the client
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35765
diff
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|
717 } |
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35765
diff
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|
718 # we keep repo.vfs out of the on purpose, ther are too many danger there |
5f5fb279fd39
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|
719 # (eg: .hg/hgrc) |
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35765
diff
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|
720 assert repo.vfs not in vfsmap.values() |
5f5fb279fd39
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35765
diff
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|
721 |
5f5fb279fd39
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parents:
35765
diff
changeset
|
722 return vfsmap |
5f5fb279fd39
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parents:
35765
diff
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|
723 |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
42823
diff
changeset
|
724 |
50665
3416b46320dc
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Pierre-Yves David <pierre-yves.david@octobus.net>
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50664
diff
changeset
|
725 def _emit2(repo, entries): |
35756
cfdccd560b66
streamclone: define first iteration of version 2 of stream format
Boris Feld <boris.feld@octobus.net>
parents:
35495
diff
changeset
|
726 """actually emit the stream bundle""" |
35767
5f5fb279fd39
streamclone: also stream caches to the client
Boris Feld <boris.feld@octobus.net>
parents:
35765
diff
changeset
|
727 vfsmap = _makemap(repo) |
47050
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46989
diff
changeset
|
728 # we keep repo.vfs out of the on purpose, ther are too many danger there |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46989
diff
changeset
|
729 # (eg: .hg/hgrc), |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
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46989
diff
changeset
|
730 # |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
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parents:
46989
diff
changeset
|
731 # this assert is duplicated (from _makemap) as author might think this is |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
732 # fine, while this is really not fine. |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
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parents:
46989
diff
changeset
|
733 if repo.vfs in vfsmap.values(): |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46989
diff
changeset
|
734 raise error.ProgrammingError( |
52714
10e7adbffa8c
streamclone: unbyteify string args to builtin Error classes
Matt Harbison <matt_harbison@yahoo.com>
parents:
52713
diff
changeset
|
735 'repo.vfs must not be added to vfsmap for security reasons' |
47050
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46989
diff
changeset
|
736 ) |
65c519661991
stream: double check that self.vfs is *not* in the vfsmap
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46989
diff
changeset
|
737 |
50665
3416b46320dc
stream-clone: directly use `_entries_walk` to generate stream-v2
Pierre-Yves David <pierre-yves.david@octobus.net>
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50664
diff
changeset
|
738 # translate the vfs one |
3416b46320dc
stream-clone: directly use `_entries_walk` to generate stream-v2
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parents:
50664
diff
changeset
|
739 entries = [(vfs_key, vfsmap[vfs_key], e) for (vfs_key, e) in entries] |
52391
3f0cf7bb3086
stream: preserve volatile cache early
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52390
diff
changeset
|
740 _test_sync_point_walk_1_2(repo) |
50665
3416b46320dc
stream-clone: directly use `_entries_walk` to generate stream-v2
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
50664
diff
changeset
|
741 |
50670
9caa860dcbec
stream-clone: implement decidated `get_streams` method for revlog
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
50669
diff
changeset
|
742 max_linkrev = len(repo) |
50665
3416b46320dc
stream-clone: directly use `_entries_walk` to generate stream-v2
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
50664
diff
changeset
|
743 file_count = totalfilesize = 0 |
52388
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
744 with VolatileManager() as volatiles: |
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
745 # make sure we preserve volatile files |
46574e588017
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parents:
52154
diff
changeset
|
746 with util.nogc(): |
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
747 # record the expected size of every file |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
748 for k, vfs, e in entries: |
52389
a260d326458f
stream: create a `e.preserve_volatiles` method directly on StoreEntry
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52388
diff
changeset
|
749 e.preserve_volatiles(vfs, volatiles) |
52388
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
750 for f in e.files(): |
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
751 file_count += 1 |
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
752 totalfilesize += f.file_size(vfs) |
50665
3416b46320dc
stream-clone: directly use `_entries_walk` to generate stream-v2
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
50664
diff
changeset
|
753 |
52388
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
754 progress = repo.ui.makeprogress( |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
755 _(b'bundle'), total=totalfilesize, unit=_(b'bytes') |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
756 ) |
46574e588017
stream: start the volatile manager sooner during emission
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parents:
52154
diff
changeset
|
757 progress.update(0) |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
758 with progress: |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
759 # the first yield release the lock on the repository |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
760 yield file_count, totalfilesize |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
761 totalbytecount = 0 |
35765
56c30b31afbe
streamclone: add support for cloning non append-only file
Boris Feld <boris.feld@octobus.net>
parents:
35757
diff
changeset
|
762 |
52388
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
763 for src, vfs, e in entries: |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
764 entry_streams = e.get_streams( |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
765 repo=repo, |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
766 vfs=vfs, |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
767 volatiles=volatiles, |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
768 max_changeset=max_linkrev, |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
769 preserve_file_count=True, |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
770 ) |
46574e588017
stream: start the volatile manager sooner during emission
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52154
diff
changeset
|
771 for name, stream, size in entry_streams: |
46574e588017
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|
772 yield src |
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changeset
|
773 yield util.uvarintencode(len(name)) |
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|
774 yield util.uvarintencode(size) |
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|
775 yield name |
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|
776 bytecount = 0 |
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|
777 for chunk in stream: |
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778 bytecount += len(chunk) |
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779 totalbytecount += len(chunk) |
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780 progress.update(totalbytecount) |
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781 yield chunk |
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|
782 if bytecount != size: |
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783 # Would most likely be caused by a race due to `hg |
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784 # strip` or a revlog split |
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785 msg = _( |
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786 b'clone could only read %d bytes from %s, but ' |
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|
787 b'expected %d bytes' |
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|
788 ) |
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|
789 raise error.Abort(msg % (bytecount, name, size)) |
35756
cfdccd560b66
streamclone: define first iteration of version 2 of stream format
Boris Feld <boris.feld@octobus.net>
parents:
35495
diff
changeset
|
790 |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
42823
diff
changeset
|
791 |
52713
f5471af96a52
typing: add trivial type annotations to `mercurial/streamclone.py`
Matt Harbison <matt_harbison@yahoo.com>
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diff
changeset
|
792 def _emit3(repo, entries) -> Iterator[bytes | None]: |
50706
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793 """actually emit the stream bundle (v3)""" |
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|
794 vfsmap = _makemap(repo) |
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795 # we keep repo.vfs out of the map on purpose, ther are too many dangers |
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796 # there (eg: .hg/hgrc), |
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797 # |
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|
798 # this assert is duplicated (from _makemap) as authors might think this is |
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799 # fine, while this is really not fine. |
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|
800 if repo.vfs in vfsmap.values(): |
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changeset
|
801 raise error.ProgrammingError( |
52714
10e7adbffa8c
streamclone: unbyteify string args to builtin Error classes
Matt Harbison <matt_harbison@yahoo.com>
parents:
52713
diff
changeset
|
802 'repo.vfs must not be added to vfsmap for security reasons' |
50706
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diff
changeset
|
803 ) |
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|
804 |
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parents:
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changeset
|
805 # translate the vfs once |
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|
806 # we only turn this into a list for the `_test_sync`, this is not ideal |
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|
807 base_entries = list(entries) |
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|
808 _test_sync_point_walk_1_2(repo) |
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|
809 entries = [] |
52388
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|
810 with VolatileManager() as volatiles: |
52043
e308439339e2
stream: rename TempCopyManager to VolatileManager
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
51901
diff
changeset
|
811 # make sure we preserve volatile files |
52391
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|
812 for vfs_key, e in base_entries: |
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|
813 vfs = vfsmap[vfs_key] |
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|
814 any_files = True |
51590
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|
815 if e.maybe_volatile: |
52391
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|
816 any_files = False |
52389
a260d326458f
stream: create a `e.preserve_volatiles` method directly on StoreEntry
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
52388
diff
changeset
|
817 e.preserve_volatiles(vfs, volatiles) |
51590
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diff
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|
818 for f in e.files(): |
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|
819 if f.is_volatile: |
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|
820 # record the expected size under lock |
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diff
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|
821 f.file_size(vfs) |
52391
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|
822 any_files = True |
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|
823 if any_files: |
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|
824 entries.append((vfs_key, vfsmap[vfs_key], e)) |
52388
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|
825 |
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|
826 total_entry_count = len(entries) |
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|
827 |
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|
828 max_linkrev = len(repo) |
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|
829 progress = repo.ui.makeprogress( |
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diff
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|
830 _(b'bundle'), |
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|
831 total=total_entry_count, |
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|
832 unit=_(b'entry'), |
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|
833 ) |
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changeset
|
834 progress.update(0) |
50706
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diff
changeset
|
835 # the first yield release the lock on the repository |
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|
836 yield None |
52388
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|
837 with progress: |
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|
838 yield util.uvarintencode(total_entry_count) |
50706
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|
839 |
52388
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52154
diff
changeset
|
840 for src, vfs, e in entries: |
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|
841 entry_streams = e.get_streams( |
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|
842 repo=repo, |
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|
843 vfs=vfs, |
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|
844 volatiles=volatiles, |
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|
845 max_changeset=max_linkrev, |
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|
846 ) |
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|
847 yield util.uvarintencode(len(entry_streams)) |
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changeset
|
848 for name, stream, size in entry_streams: |
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|
849 yield src |
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|
850 yield util.uvarintencode(len(name)) |
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|
851 yield util.uvarintencode(size) |
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|
852 yield name |
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|
853 yield from stream |
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|
854 progress.increment() |
50706
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diff
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|
855 |
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|
856 |
52391
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|
857 def _test_sync_point_walk_1_2(repo): |
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|
858 """a function for synchronisation during tests |
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|
859 |
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diff
changeset
|
860 Triggered after gather entry, but before starting to process/preserve them |
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|
861 under lock. |
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changeset
|
862 |
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changeset
|
863 (on v1 is triggered before the actual walk start) |
3f0cf7bb3086
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|
864 """ |
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diff
changeset
|
865 |
3f0cf7bb3086
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diff
changeset
|
866 |
52390
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diff
changeset
|
867 def _test_sync_point_walk_3(repo): |
52391
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|
868 """a function for synchronisation during tests |
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|
869 |
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changeset
|
870 Triggered right before releasing the lock, but after computing what need |
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|
871 needed to compute under lock. |
3f0cf7bb3086
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changeset
|
872 """ |
46986
faa43f09ad98
streamclone: remove sleep based "synchronisation" in tests
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46895
diff
changeset
|
873 |
faa43f09ad98
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diff
changeset
|
874 |
52390
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|
875 def _test_sync_point_walk_4(repo): |
52391
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|
876 """a function for synchronisation during tests |
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changeset
|
877 |
3f0cf7bb3086
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changeset
|
878 Triggered right after releasing the lock. |
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|
879 """ |
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changeset
|
880 |
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changeset
|
881 |
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changeset
|
882 # not really a StoreEntry, but close enough |
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|
883 class CacheEntry(store.SimpleStoreEntry): |
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884 """Represent an entry for Cache files |
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885 |
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886 It has special logic to preserve cache file early and accept optional |
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887 presence. |
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888 |
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889 |
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890 (Yes... this is not really a StoreEntry, but close enough. We could have a |
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891 BaseEntry base class, bbut the store one would be identical) |
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892 """ |
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893 |
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894 def __init__(self, entry_path) -> None: |
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895 super().__init__( |
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896 entry_path, |
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897 # we will directly deal with that in `setup_cache_file` |
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898 is_volatile=True, |
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899 ) |
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900 |
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901 def preserve_volatiles(self, vfs, volatiles) -> None: |
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902 self._file_size = volatiles.try_keep(vfs.join(self._entry_path)) |
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903 if self._file_size is None: |
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904 self._files = [] |
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905 else: |
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906 assert self._is_volatile |
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907 self._files = [ |
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908 CacheFile( |
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909 unencoded_path=self._entry_path, |
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910 file_size=self._file_size, |
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911 is_volatile=self._is_volatile, |
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912 ) |
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913 ] |
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914 |
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915 def files(self) -> list[store.StoreFile]: |
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916 if self._files is None: |
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917 self._files = [ |
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918 CacheFile( |
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919 unencoded_path=self._entry_path, |
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920 is_volatile=self._is_volatile, |
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921 ) |
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922 ] |
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923 return super().files() |
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924 |
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925 |
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926 class CacheFile(store.StoreFile): |
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927 # inform the "copy/hardlink" version that this file might be missing |
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928 # without consequences. |
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929 optional: bool = True |
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930 |
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931 |
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932 def _entries_walk(repo, includes, excludes, includeobsmarkers: bool): |
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933 """emit a seris of files information useful to clone a repo |
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934 |
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935 return (vfs-key, entry) iterator |
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936 |
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937 Where `entry` is StoreEntry. (used even for cache entries) |
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938 """ |
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939 assert repo._currentlock(repo._lockref) is not None |
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940 |
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941 matcher = None |
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942 if includes or excludes: |
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943 matcher = narrowspec.match(repo.root, includes, excludes) |
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944 |
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945 phase = not repo.publishing() |
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946 # Python is getting crazy at all the small container we creates, disabling |
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947 # the gc while we do so helps performance a lot. |
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948 with util.nogc(): |
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949 entries = _walkstreamfiles( |
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950 repo, |
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951 matcher, |
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952 phase=phase, |
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953 obsolescence=includeobsmarkers, |
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954 ) |
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955 for entry in entries: |
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956 yield (_srcstore, entry) |
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957 |
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958 for name in cacheutil.cachetocopy(repo): |
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959 if repo.cachevfs.exists(name): |
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960 # not really a StoreEntry, but close enough |
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961 yield (_srccache, CacheEntry(entry_path=name)) |
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962 |
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963 |
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964 def generatev2(repo, includes, excludes, includeobsmarkers: bool): |
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965 """Emit content for version 2 of a streaming clone. |
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966 |
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967 the data stream consists the following entries: |
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968 1) A char representing the file destination (eg: store or cache) |
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969 2) A varint containing the length of the filename |
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970 3) A varint containing the length of file data |
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971 4) N bytes containing the filename (the internal, store-agnostic form) |
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972 5) N bytes containing the file data |
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973 |
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974 Returns a 3-tuple of (file count, file size, data iterator). |
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975 """ |
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976 |
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977 with repo.lock(): |
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978 repo.ui.debug(b'scanning\n') |
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979 |
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980 entries = _entries_walk( |
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981 repo, |
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982 includes=includes, |
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983 excludes=excludes, |
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984 includeobsmarkers=includeobsmarkers, |
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985 ) |
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986 chunks = _emit2(repo, entries) |
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987 first = next(chunks) |
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988 file_count, total_file_size = first |
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989 _test_sync_point_walk_3(repo) |
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990 _test_sync_point_walk_4(repo) |
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991 |
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992 return file_count, total_file_size, chunks |
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993 |
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994 |
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995 def generatev3( |
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996 repo, includes, excludes, includeobsmarkers: bool |
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997 ) -> Iterator[bytes | None]: |
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998 """Emit content for version 3 of a streaming clone. |
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999 |
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1000 the data stream consists the following: |
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1001 1) A varint E containing the number of entries (can be 0), then E entries follow |
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1002 2) For each entry: |
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1003 2.1) The number of files in this entry (can be 0, but typically 1 or 2) |
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1004 2.2) For each file: |
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1005 2.2.1) A char representing the file destination (eg: store or cache) |
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1006 2.2.2) A varint N containing the length of the filename |
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1007 2.2.3) A varint M containing the length of file data |
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1008 2.2.4) N bytes containing the filename (the internal, store-agnostic form) |
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1009 2.2.5) M bytes containing the file data |
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1010 |
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1011 Returns the data iterator. |
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1012 |
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1013 XXX This format is experimental and subject to change. Here is a |
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1014 XXX non-exhaustive list of things this format could do or change: |
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1015 |
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1016 - making it easier to write files in parallel |
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1017 - holding the lock for a shorter time |
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1018 - improving progress information |
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1019 - ways to adjust the number of expected entries/files ? |
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1020 """ |
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1021 |
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1022 # Python is getting crazy at all the small container we creates while |
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1023 # considering the files to preserve, disabling the gc while we do so helps |
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1024 # performance a lot. |
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1025 with repo.lock(), util.nogc(): |
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1026 repo.ui.debug(b'scanning\n') |
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1027 |
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1028 entries = _entries_walk( |
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1029 repo, |
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1030 includes=includes, |
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1031 excludes=excludes, |
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1032 includeobsmarkers=includeobsmarkers, |
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1033 ) |
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1034 chunks = _emit3(repo, list(entries)) |
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1035 first = next(chunks) |
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1036 assert first is None |
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1037 _test_sync_point_walk_3(repo) |
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1038 _test_sync_point_walk_4(repo) |
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1039 |
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1040 return chunks |
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1041 |
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1042 |
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1043 @contextlib.contextmanager |
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1044 def nested(*ctxs): |
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1045 this = ctxs[0] |
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1046 rest = ctxs[1:] |
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1047 with this: |
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1048 if rest: |
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1049 with nested(*rest): |
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1050 yield |
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1051 else: |
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1052 yield |
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1053 |
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1054 |
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1055 def consumev2(repo, fp, filecount: int, filesize: int) -> None: |
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1056 """Apply the contents from a version 2 streaming clone. |
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1057 |
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1058 Data is read from an object that only needs to provide a ``read(size)`` |
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1059 method. |
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1060 """ |
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1061 with repo.lock(): |
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1062 repo.ui.status( |
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1063 _(b'%d files to transfer, %s of data\n') |
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1064 % (filecount, util.bytecount(filesize)) |
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1065 ) |
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1066 |
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1067 start = util.timer() |
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1068 progress = repo.ui.makeprogress( |
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1069 _(b'clone'), total=filesize, unit=_(b'bytes') |
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1070 ) |
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1071 progress.update(0) |
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1072 byte_count = 0 |
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1073 |
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1074 vfsmap = _makemap(repo) |
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1075 # we keep repo.vfs out of the on purpose, ther are too many danger |
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1076 # there (eg: .hg/hgrc), |
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1077 # |
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1078 # this assert is duplicated (from _makemap) as author might think this |
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1079 # is fine, while this is really not fine. |
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1080 if repo.vfs in vfsmap.values(): |
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1081 raise error.ProgrammingError( |
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1082 'repo.vfs must not be added to vfsmap for security reasons' |
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1083 ) |
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1084 |
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1085 with repo.transaction(b'clone'): |
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1086 ctxs = (vfs.backgroundclosing(repo.ui) for vfs in vfsmap.values()) |
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1087 with nested(*ctxs): |
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1088 for i in range(filecount): |
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1089 src = util.readexactly(fp, 1) |
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1090 vfs = vfsmap[src] |
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1091 namelen = util.uvarintdecodestream(fp) |
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1092 datalen = util.uvarintdecodestream(fp) |
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1093 |
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1094 name = util.readexactly(fp, namelen) |
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1095 |
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1096 if repo.ui.debugflag: |
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1097 repo.ui.debug( |
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1098 b'adding [%s] %s (%s)\n' |
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1099 % (src, name, util.bytecount(datalen)) |
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1100 ) |
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1101 |
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1102 with vfs(name, b'w') as ofp: |
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1103 for chunk in util.filechunkiter(fp, limit=datalen): |
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1104 byte_count += len(chunk) |
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1105 progress.increment(step=len(chunk)) |
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1106 ofp.write(chunk) |
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1107 |
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1108 # force @filecache properties to be reloaded from |
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1109 # streamclone-ed file at next access |
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1110 repo.invalidate(clearfilecache=True) |
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1111 |
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1112 progress.complete() |
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1113 _report_transferred(repo, start, byte_count) |
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1114 |
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1115 |
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1116 def consumev3(repo, fp) -> None: |
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1117 """Apply the contents from a version 3 streaming clone. |
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1118 |
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1119 Data is read from an object that only needs to provide a ``read(size)`` |
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1120 method. |
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1121 """ |
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1122 with repo.lock(): |
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1123 start = util.timer() |
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1124 |
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1125 entrycount = util.uvarintdecodestream(fp) |
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1126 repo.ui.status(_(b'%d entries to transfer\n') % (entrycount)) |
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1127 |
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1128 progress = repo.ui.makeprogress( |
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1129 _(b'clone'), |
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1130 total=entrycount, |
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1131 unit=_(b'entries'), |
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1132 ) |
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1133 progress.update(0) |
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1134 bytes_transferred = 0 |
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1135 |
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1136 vfsmap = _makemap(repo) |
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1137 # we keep repo.vfs out of the on purpose, there are too many dangers |
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1138 # there (eg: .hg/hgrc), |
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1139 # |
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1140 # this assert is duplicated (from _makemap) as authors might think this |
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1141 # is fine, while this is really not fine. |
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1142 if repo.vfs in vfsmap.values(): |
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1143 raise error.ProgrammingError( |
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1144 'repo.vfs must not be added to vfsmap for security reasons' |
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1145 ) |
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1146 |
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1147 with repo.transaction(b'clone'): |
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1148 ctxs = (vfs.backgroundclosing(repo.ui) for vfs in vfsmap.values()) |
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1149 with nested(*ctxs): |
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1150 for i in range(entrycount): |
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1151 filecount = util.uvarintdecodestream(fp) |
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1152 if filecount == 0: |
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1153 if repo.ui.debugflag: |
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1154 repo.ui.debug(b'entry with no files [%d]\n' % (i)) |
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1155 for i in range(filecount): |
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1156 src = util.readexactly(fp, 1) |
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1157 vfs = vfsmap[src] |
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1158 namelen = util.uvarintdecodestream(fp) |
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1159 datalen = util.uvarintdecodestream(fp) |
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1160 |
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1161 name = util.readexactly(fp, namelen) |
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1162 |
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1163 if repo.ui.debugflag: |
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1164 msg = b'adding [%s] %s (%s)\n' |
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1165 msg %= (src, name, util.bytecount(datalen)) |
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1166 repo.ui.debug(msg) |
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1167 bytes_transferred += datalen |
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1168 |
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1169 with vfs(name, b'w') as ofp: |
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1170 for chunk in util.filechunkiter(fp, limit=datalen): |
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1171 ofp.write(chunk) |
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1172 progress.increment(step=1) |
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1173 |
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1174 # force @filecache properties to be reloaded from |
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1175 # streamclone-ed file at next access |
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1176 repo.invalidate(clearfilecache=True) |
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1177 |
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1178 progress.complete() |
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1179 _report_transferred(repo, start, bytes_transferred) |
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1180 |
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1181 |
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1182 def applybundlev2( |
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1183 repo, fp, filecount: int, filesize: int, requirements: Iterable[bytes] |
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1184 ) -> None: |
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1185 from . import localrepo |
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1186 |
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1187 missingreqs = [r for r in requirements if r not in repo.supported] |
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1188 if missingreqs: |
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1189 raise error.Abort( |
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1190 _(b'unable to apply stream clone: unsupported format: %s') |
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1191 % b', '.join(sorted(missingreqs)) |
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1192 ) |
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1193 |
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1194 consumev2(repo, fp, filecount, filesize) |
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1195 |
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1196 repo.requirements = new_stream_clone_requirements( |
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1197 repo.requirements, |
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1198 requirements, |
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1199 ) |
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1200 repo.svfs.options = localrepo.resolvestorevfsoptions( |
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1201 repo.ui, repo.requirements, repo.features |
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1202 ) |
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1203 scmutil.writereporequirements(repo) |
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1204 nodemap.post_stream_cleanup(repo) |
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1205 |
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1206 |
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1207 def applybundlev3(repo, fp, requirements: Iterable[bytes]) -> None: |
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1208 from . import localrepo |
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1209 |
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1210 missingreqs = [r for r in requirements if r not in repo.supported] |
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1211 if missingreqs: |
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1212 msg = _(b'unable to apply stream clone: unsupported format: %s') |
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1213 msg %= b', '.join(sorted(missingreqs)) |
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1214 raise error.Abort(msg) |
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1215 |
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1216 consumev3(repo, fp) |
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1217 |
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1218 repo.requirements = new_stream_clone_requirements( |
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1219 repo.requirements, |
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1220 requirements, |
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1221 ) |
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1222 repo.svfs.options = localrepo.resolvestorevfsoptions( |
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1223 repo.ui, repo.requirements, repo.features |
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1224 ) |
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1225 scmutil.writereporequirements(repo) |
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1226 nodemap.post_stream_cleanup(repo) |
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1227 |
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1228 |
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1229 def _copy_files(src_vfs_map, dst_vfs_map, entries, progress) -> bool: |
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1230 hardlink = [True] |
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1231 |
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1232 def copy_used(): |
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1233 hardlink[0] = False |
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1234 progress.topic = _(b'copying') |
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1235 |
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1236 for k, path, optional in entries: |
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1237 src_vfs = src_vfs_map[k] |
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1238 dst_vfs = dst_vfs_map[k] |
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1239 src_path = src_vfs.join(path) |
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1240 dst_path = dst_vfs.join(path) |
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1241 # We cannot use dirname and makedirs of dst_vfs here because the store |
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1242 # encoding confuses them. See issue 6581 for details. |
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1243 dirname = os.path.dirname(dst_path) |
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1244 if not os.path.exists(dirname): |
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1245 util.makedirs(dirname) |
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1246 dst_vfs.register_file(path) |
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1247 # XXX we could use the #nb_bytes argument. |
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1248 try: |
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1249 util.copyfile( |
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1250 src_path, |
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1251 dst_path, |
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1252 hardlink=hardlink[0], |
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1253 no_hardlink_cb=copy_used, |
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1254 check_fs_hardlink=False, |
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1255 ) |
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1256 except FileNotFoundError: |
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1257 if not optional: |
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1258 raise |
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1259 progress.increment() |
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1260 return hardlink[0] |
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1261 |
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1262 |
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1263 def local_copy(src_repo, dest_repo) -> None: |
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1264 """copy all content from one local repository to another |
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1265 |
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1266 This is useful for local clone""" |
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1267 src_store_requirements = { |
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1268 r |
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1269 for r in src_repo.requirements |
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1270 if r not in requirementsmod.WORKING_DIR_REQUIREMENTS |
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1271 } |
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1272 dest_store_requirements = { |
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1273 r |
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1274 for r in dest_repo.requirements |
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1275 if r not in requirementsmod.WORKING_DIR_REQUIREMENTS |
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1276 } |
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1277 assert src_store_requirements == dest_store_requirements |
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1278 |
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1279 with dest_repo.lock(): |
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1280 with src_repo.lock(): |
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1281 # bookmark is not integrated to the streaming as it might use the |
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1282 # `repo.vfs` and they are too many sentitive data accessible |
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1283 # through `repo.vfs` to expose it to streaming clone. |
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1284 src_book_vfs = bookmarks.bookmarksvfs(src_repo) |
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1285 srcbookmarks = src_book_vfs.join(b'bookmarks') |
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1286 bm_count = 0 |
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1287 if os.path.exists(srcbookmarks): |
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1288 bm_count = 1 |
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1289 |
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1290 entries = _entries_walk( |
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1291 src_repo, |
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1292 includes=None, |
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1293 excludes=None, |
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1294 includeobsmarkers=True, |
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1295 ) |
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1296 entries = list(entries) |
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1297 src_vfs_map = _makemap(src_repo) |
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1298 dest_vfs_map = _makemap(dest_repo) |
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1299 total_files = sum(len(e[1].files()) for e in entries) + bm_count |
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1300 progress = src_repo.ui.makeprogress( |
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1301 topic=_(b'linking'), |
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1302 total=total_files, |
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1303 unit=_(b'files'), |
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1304 ) |
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1305 # copy files |
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1306 # |
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1307 # We could copy the full file while the source repository is locked |
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1308 # and the other one without the lock. However, in the linking case, |
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1309 # this would also requires checks that nobody is appending any data |
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1310 # to the files while we do the clone, so this is not done yet. We |
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1311 # could do this blindly when copying files. |
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1312 files = [ |
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1313 (vfs_key, f.unencoded_path, f.optional) |
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1314 for vfs_key, e in entries |
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1315 for f in e.files() |
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1316 ] |
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1317 hardlink = _copy_files(src_vfs_map, dest_vfs_map, files, progress) |
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1318 |
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1319 # copy bookmarks over |
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1320 if bm_count: |
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1321 dst_book_vfs = bookmarks.bookmarksvfs(dest_repo) |
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1322 dstbookmarks = dst_book_vfs.join(b'bookmarks') |
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1323 util.copyfile(srcbookmarks, dstbookmarks) |
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1324 progress.complete() |
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1325 if hardlink: |
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1326 msg = b'linked %d files\n' |
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1327 else: |
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1328 msg = b'copied %d files\n' |
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1329 src_repo.ui.debug(msg % total_files) |
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1330 |
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1331 with dest_repo.transaction(b"localclone") as tr: |
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1332 dest_repo.store.write(tr) |
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1333 |
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1334 # clean up transaction file as they do not make sense |
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1335 transaction.cleanup_undo_files(dest_repo.ui.warn, dest_repo.vfs_map) |