Mercurial > hg
annotate mercurial/bundle2.py @ 23883:7e71898a7cdc
share: replace the bookmarks.shared file with an entry on a new "shared" file
cd79fb4d75fd introduced a way to share bookmarks. When a repository share that
shares bookmarks was created, a .hg/bookmarks.shared file was created to mark
the repository share as one that shares its bookmarks.
We have plans to introduce other levels of sharing, including a "full share"
mode. Rather than creating a new ".shared" file for each new thing that we may
want to share It seems better to create a single "shared" file that will list
what is shared for a given shared repository. This should make it much easier
to get a list of everything that is shared by a given shared repository.
The shared file contains a list of shared "items" (such as bookmarks). Each
shared "item" is added as a new line in the file. For now the only possible
entry in the file is "bookmarks".
author | Angel Ezquerra <angel.ezquerra@gmail.com> |
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date | Sun, 11 Jan 2015 16:20:15 +0100 |
parents | 405eacbecc52 |
children | a3f7c781786b |
rev | line source |
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1 # bundle2.py - generic container format to transmit arbitrary data. |
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2 # |
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3 # Copyright 2013 Facebook, Inc. |
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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 """Handling of the new bundle2 format |
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8 |
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9 The goal of bundle2 is to act as an atomically packet to transmit a set of |
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10 payloads in an application agnostic way. It consist in a sequence of "parts" |
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11 that will be handed to and processed by the application layer. |
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12 |
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13 |
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14 General format architecture |
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15 =========================== |
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16 |
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17 The format is architectured as follow |
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18 |
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19 - magic string |
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20 - stream level parameters |
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21 - payload parts (any number) |
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22 - end of stream marker. |
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23 |
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24 the Binary format |
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25 ============================ |
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26 |
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27 All numbers are unsigned and big-endian. |
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28 |
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29 stream level parameters |
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30 ------------------------ |
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31 |
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32 Binary format is as follow |
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33 |
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34 :params size: int32 |
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35 |
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36 The total number of Bytes used by the parameters |
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37 |
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38 :params value: arbitrary number of Bytes |
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39 |
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40 A blob of `params size` containing the serialized version of all stream level |
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41 parameters. |
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42 |
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43 The blob contains a space separated list of parameters. Parameters with value |
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44 are stored in the form `<name>=<value>`. Both name and value are urlquoted. |
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45 |
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46 Empty name are obviously forbidden. |
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47 |
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48 Name MUST start with a letter. If this first letter is lower case, the |
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49 parameter is advisory and can be safely ignored. However when the first |
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50 letter is capital, the parameter is mandatory and the bundling process MUST |
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51 stop if he is not able to proceed it. |
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53 Stream parameters use a simple textual format for two main reasons: |
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54 |
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55 - Stream level parameters should remain simple and we want to discourage any |
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56 crazy usage. |
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57 - Textual data allow easy human inspection of a bundle2 header in case of |
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58 troubles. |
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59 |
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60 Any Applicative level options MUST go into a bundle2 part instead. |
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61 |
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62 Payload part |
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63 ------------------------ |
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64 |
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65 Binary format is as follow |
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66 |
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67 :header size: int32 |
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68 |
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69 The total number of Bytes used by the part headers. When the header is empty |
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70 (size = 0) this is interpreted as the end of stream marker. |
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71 |
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72 :header: |
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73 |
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74 The header defines how to interpret the part. It contains two piece of |
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75 data: the part type, and the part parameters. |
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76 |
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77 The part type is used to route an application level handler, that can |
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78 interpret payload. |
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79 |
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80 Part parameters are passed to the application level handler. They are |
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81 meant to convey information that will help the application level object to |
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82 interpret the part payload. |
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83 |
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84 The binary format of the header is has follow |
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85 |
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86 :typesize: (one byte) |
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87 |
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88 :parttype: alphanumerical part name (restricted to ^a-zA-Z0-9_:-]) |
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89 |
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90 :partid: A 32bits integer (unique in the bundle) that can be used to refer |
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91 to this part. |
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92 |
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93 :parameters: |
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94 |
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95 Part's parameter may have arbitrary content, the binary structure is:: |
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96 |
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97 <mandatory-count><advisory-count><param-sizes><param-data> |
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98 |
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99 :mandatory-count: 1 byte, number of mandatory parameters |
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100 |
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101 :advisory-count: 1 byte, number of advisory parameters |
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102 |
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103 :param-sizes: |
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104 |
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105 N couple of bytes, where N is the total number of parameters. Each |
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106 couple contains (<size-of-key>, <size-of-value) for one parameter. |
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107 |
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108 :param-data: |
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109 |
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110 A blob of bytes from which each parameter key and value can be |
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111 retrieved using the list of size couples stored in the previous |
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112 field. |
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113 |
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114 Mandatory parameters comes first, then the advisory ones. |
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115 |
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116 Each parameter's key MUST be unique within the part. |
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117 |
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118 :payload: |
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119 |
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120 payload is a series of `<chunksize><chunkdata>`. |
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121 |
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122 `chunksize` is an int32, `chunkdata` are plain bytes (as much as |
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123 `chunksize` says)` The payload part is concluded by a zero size chunk. |
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124 |
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125 The current implementation always produces either zero or one chunk. |
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126 This is an implementation limitation that will ultimately be lifted. |
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127 |
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128 `chunksize` can be negative to trigger special case processing. No such |
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129 processing is in place yet. |
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130 |
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131 Bundle processing |
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132 ============================ |
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133 |
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134 Each part is processed in order using a "part handler". Handler are registered |
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135 for a certain part type. |
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136 |
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137 The matching of a part to its handler is case insensitive. The case of the |
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138 part type is used to know if a part is mandatory or advisory. If the Part type |
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139 contains any uppercase char it is considered mandatory. When no handler is |
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140 known for a Mandatory part, the process is aborted and an exception is raised. |
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141 If the part is advisory and no handler is known, the part is ignored. When the |
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142 process is aborted, the full bundle is still read from the stream to keep the |
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143 channel usable. But none of the part read from an abort are processed. In the |
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144 future, dropping the stream may become an option for channel we do not care to |
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145 preserve. |
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146 """ |
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147 |
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148 import sys |
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149 import util |
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150 import struct |
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151 import urllib |
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152 import string |
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153 import obsolete |
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154 import pushkey |
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155 import url |
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156 import re |
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157 |
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158 import changegroup, error |
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159 from i18n import _ |
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160 |
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161 _pack = struct.pack |
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162 _unpack = struct.unpack |
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163 |
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164 _magicstring = 'HG2Y' |
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165 |
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166 _fstreamparamsize = '>i' |
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167 _fpartheadersize = '>i' |
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168 _fparttypesize = '>B' |
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169 _fpartid = '>I' |
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170 _fpayloadsize = '>i' |
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171 _fpartparamcount = '>BB' |
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172 |
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173 preferedchunksize = 4096 |
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174 |
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175 _parttypeforbidden = re.compile('[^a-zA-Z0-9_:-]') |
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176 |
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177 def validateparttype(parttype): |
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178 """raise ValueError if a parttype contains invalid character""" |
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179 if _parttypeforbidden.match(parttype): |
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180 raise ValueError(parttype) |
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181 |
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182 def _makefpartparamsizes(nbparams): |
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183 """return a struct format to read part parameter sizes |
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184 |
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185 The number parameters is variable so we need to build that format |
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186 dynamically. |
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187 """ |
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188 return '>'+('BB'*nbparams) |
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189 |
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190 parthandlermapping = {} |
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191 |
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192 def parthandler(parttype, params=()): |
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193 """decorator that register a function as a bundle2 part handler |
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194 |
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195 eg:: |
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196 |
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197 @parthandler('myparttype', ('mandatory', 'param', 'handled')) |
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198 def myparttypehandler(...): |
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199 '''process a part of type "my part".''' |
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200 ... |
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201 """ |
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202 validateparttype(parttype) |
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203 def _decorator(func): |
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204 lparttype = parttype.lower() # enforce lower case matching. |
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205 assert lparttype not in parthandlermapping |
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206 parthandlermapping[lparttype] = func |
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207 func.params = frozenset(params) |
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208 return func |
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209 return _decorator |
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210 |
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211 class unbundlerecords(object): |
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212 """keep record of what happens during and unbundle |
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213 |
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214 New records are added using `records.add('cat', obj)`. Where 'cat' is a |
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215 category of record and obj is an arbitrary object. |
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216 |
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217 `records['cat']` will return all entries of this category 'cat'. |
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218 |
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219 Iterating on the object itself will yield `('category', obj)` tuples |
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220 for all entries. |
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221 |
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222 All iterations happens in chronological order. |
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223 """ |
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224 |
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225 def __init__(self): |
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226 self._categories = {} |
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227 self._sequences = [] |
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228 self._replies = {} |
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229 |
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230 def add(self, category, entry, inreplyto=None): |
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231 """add a new record of a given category. |
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232 |
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233 The entry can then be retrieved in the list returned by |
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234 self['category'].""" |
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235 self._categories.setdefault(category, []).append(entry) |
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236 self._sequences.append((category, entry)) |
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237 if inreplyto is not None: |
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238 self.getreplies(inreplyto).add(category, entry) |
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239 |
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240 def getreplies(self, partid): |
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241 """get the records that are replies to a specific part""" |
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242 return self._replies.setdefault(partid, unbundlerecords()) |
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243 |
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244 def __getitem__(self, cat): |
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245 return tuple(self._categories.get(cat, ())) |
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246 |
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247 def __iter__(self): |
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248 return iter(self._sequences) |
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249 |
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250 def __len__(self): |
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251 return len(self._sequences) |
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252 |
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253 def __nonzero__(self): |
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254 return bool(self._sequences) |
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255 |
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256 class bundleoperation(object): |
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257 """an object that represents a single bundling process |
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258 |
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259 Its purpose is to carry unbundle-related objects and states. |
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260 |
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261 A new object should be created at the beginning of each bundle processing. |
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262 The object is to be returned by the processing function. |
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263 |
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264 The object has very little content now it will ultimately contain: |
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265 * an access to the repo the bundle is applied to, |
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266 * a ui object, |
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267 * a way to retrieve a transaction to add changes to the repo, |
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268 * a way to record the result of processing each part, |
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269 * a way to construct a bundle response when applicable. |
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270 """ |
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271 |
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272 def __init__(self, repo, transactiongetter): |
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273 self.repo = repo |
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274 self.ui = repo.ui |
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275 self.records = unbundlerecords() |
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276 self.gettransaction = transactiongetter |
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277 self.reply = None |
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278 |
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279 class TransactionUnavailable(RuntimeError): |
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280 pass |
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281 |
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282 def _notransaction(): |
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283 """default method to get a transaction while processing a bundle |
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284 |
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285 Raise an exception to highlight the fact that no transaction was expected |
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286 to be created""" |
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287 raise TransactionUnavailable() |
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288 |
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289 def processbundle(repo, unbundler, transactiongetter=None): |
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290 """This function process a bundle, apply effect to/from a repo |
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291 |
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292 It iterates over each part then searches for and uses the proper handling |
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293 code to process the part. Parts are processed in order. |
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294 |
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295 This is very early version of this function that will be strongly reworked |
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296 before final usage. |
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297 |
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298 Unknown Mandatory part will abort the process. |
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299 """ |
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300 if transactiongetter is None: |
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301 transactiongetter = _notransaction |
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302 op = bundleoperation(repo, transactiongetter) |
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303 # todo: |
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304 # - replace this is a init function soon. |
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305 # - exception catching |
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306 unbundler.params |
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307 iterparts = unbundler.iterparts() |
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308 part = None |
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309 try: |
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310 for part in iterparts: |
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311 _processpart(op, part) |
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312 except Exception, exc: |
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313 for part in iterparts: |
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314 # consume the bundle content |
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315 part.read() |
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316 # Small hack to let caller code distinguish exceptions from bundle2 |
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317 # processing from processing the old format. This is mostly |
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318 # needed to handle different return codes to unbundle according to the |
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319 # type of bundle. We should probably clean up or drop this return code |
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320 # craziness in a future version. |
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321 exc.duringunbundle2 = True |
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322 raise |
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323 return op |
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324 |
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325 def _processpart(op, part): |
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326 """process a single part from a bundle |
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327 |
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328 The part is guaranteed to have been fully consumed when the function exits |
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329 (even if an exception is raised).""" |
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330 try: |
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331 try: |
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332 handler = parthandlermapping.get(part.type) |
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333 if handler is None: |
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334 raise error.UnsupportedPartError(parttype=part.type) |
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335 op.ui.debug('found a handler for part %r\n' % part.type) |
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336 unknownparams = part.mandatorykeys - handler.params |
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337 if unknownparams: |
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338 unknownparams = list(unknownparams) |
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339 unknownparams.sort() |
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340 raise error.UnsupportedPartError(parttype=part.type, |
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341 params=unknownparams) |
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342 except error.UnsupportedPartError, exc: |
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343 if part.mandatory: # mandatory parts |
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344 raise |
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345 op.ui.debug('ignoring unsupported advisory part %s\n' % exc) |
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346 return # skip to part processing |
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347 |
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348 # handler is called outside the above try block so that we don't |
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349 # risk catching KeyErrors from anything other than the |
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350 # parthandlermapping lookup (any KeyError raised by handler() |
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351 # itself represents a defect of a different variety). |
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352 output = None |
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353 if op.reply is not None: |
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354 op.ui.pushbuffer(error=True) |
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355 output = '' |
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356 try: |
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357 handler(op, part) |
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358 finally: |
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359 if output is not None: |
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360 output = op.ui.popbuffer() |
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361 if output: |
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362 outpart = op.reply.newpart('b2x:output', data=output, |
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363 mandatory=False) |
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364 outpart.addparam('in-reply-to', str(part.id), mandatory=False) |
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365 finally: |
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366 # consume the part content to not corrupt the stream. |
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367 part.read() |
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368 |
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369 |
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370 def decodecaps(blob): |
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371 """decode a bundle2 caps bytes blob into a dictionary |
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372 |
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373 The blob is a list of capabilities (one per line) |
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374 Capabilities may have values using a line of the form:: |
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375 |
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376 capability=value1,value2,value3 |
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377 |
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378 The values are always a list.""" |
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379 caps = {} |
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380 for line in blob.splitlines(): |
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381 if not line: |
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382 continue |
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383 if '=' not in line: |
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384 key, vals = line, () |
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385 else: |
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386 key, vals = line.split('=', 1) |
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387 vals = vals.split(',') |
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388 key = urllib.unquote(key) |
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389 vals = [urllib.unquote(v) for v in vals] |
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390 caps[key] = vals |
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391 return caps |
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392 |
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393 def encodecaps(caps): |
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394 """encode a bundle2 caps dictionary into a bytes blob""" |
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395 chunks = [] |
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396 for ca in sorted(caps): |
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397 vals = caps[ca] |
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398 ca = urllib.quote(ca) |
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399 vals = [urllib.quote(v) for v in vals] |
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400 if vals: |
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401 ca = "%s=%s" % (ca, ','.join(vals)) |
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402 chunks.append(ca) |
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403 return '\n'.join(chunks) |
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404 |
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405 class bundle20(object): |
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406 """represent an outgoing bundle2 container |
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407 |
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408 Use the `addparam` method to add stream level parameter. and `newpart` to |
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409 populate it. Then call `getchunks` to retrieve all the binary chunks of |
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410 data that compose the bundle2 container.""" |
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411 |
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412 def __init__(self, ui, capabilities=()): |
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413 self.ui = ui |
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414 self._params = [] |
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415 self._parts = [] |
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416 self.capabilities = dict(capabilities) |
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417 |
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418 @property |
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419 def nbparts(self): |
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420 """total number of parts added to the bundler""" |
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421 return len(self._parts) |
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422 |
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423 # methods used to defines the bundle2 content |
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424 def addparam(self, name, value=None): |
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425 """add a stream level parameter""" |
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426 if not name: |
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427 raise ValueError('empty parameter name') |
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428 if name[0] not in string.letters: |
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429 raise ValueError('non letter first character: %r' % name) |
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430 self._params.append((name, value)) |
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431 |
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432 def addpart(self, part): |
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433 """add a new part to the bundle2 container |
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434 |
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435 Parts contains the actual applicative payload.""" |
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436 assert part.id is None |
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437 part.id = len(self._parts) # very cheap counter |
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438 self._parts.append(part) |
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439 |
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440 def newpart(self, typeid, *args, **kwargs): |
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441 """create a new part and add it to the containers |
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442 |
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443 As the part is directly added to the containers. For now, this means |
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444 that any failure to properly initialize the part after calling |
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445 ``newpart`` should result in a failure of the whole bundling process. |
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446 |
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447 You can still fall back to manually create and add if you need better |
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448 control.""" |
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449 part = bundlepart(typeid, *args, **kwargs) |
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450 self.addpart(part) |
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451 return part |
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452 |
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453 # methods used to generate the bundle2 stream |
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454 def getchunks(self): |
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455 self.ui.debug('start emission of %s stream\n' % _magicstring) |
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456 yield _magicstring |
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457 param = self._paramchunk() |
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458 self.ui.debug('bundle parameter: %s\n' % param) |
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459 yield _pack(_fstreamparamsize, len(param)) |
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460 if param: |
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461 yield param |
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462 |
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463 self.ui.debug('start of parts\n') |
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464 for part in self._parts: |
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465 self.ui.debug('bundle part: "%s"\n' % part.type) |
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466 for chunk in part.getchunks(): |
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467 yield chunk |
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468 self.ui.debug('end of bundle\n') |
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469 yield _pack(_fpartheadersize, 0) |
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470 |
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471 def _paramchunk(self): |
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472 """return a encoded version of all stream parameters""" |
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473 blocks = [] |
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474 for par, value in self._params: |
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475 par = urllib.quote(par) |
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476 if value is not None: |
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477 value = urllib.quote(value) |
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478 par = '%s=%s' % (par, value) |
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479 blocks.append(par) |
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480 return ' '.join(blocks) |
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481 |
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482 class unpackermixin(object): |
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483 """A mixin to extract bytes and struct data from a stream""" |
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484 |
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485 def __init__(self, fp): |
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486 self._fp = fp |
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487 |
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488 def _unpack(self, format): |
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489 """unpack this struct format from the stream""" |
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490 data = self._readexact(struct.calcsize(format)) |
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491 return _unpack(format, data) |
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492 |
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493 def _readexact(self, size): |
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494 """read exactly <size> bytes from the stream""" |
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495 return changegroup.readexactly(self._fp, size) |
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496 |
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497 |
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498 class unbundle20(unpackermixin): |
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499 """interpret a bundle2 stream |
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500 |
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501 This class is fed with a binary stream and yields parts through its |
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502 `iterparts` methods.""" |
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503 |
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504 def __init__(self, ui, fp, header=None): |
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505 """If header is specified, we do not read it out of the stream.""" |
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506 self.ui = ui |
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507 super(unbundle20, self).__init__(fp) |
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508 if header is None: |
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509 header = self._readexact(4) |
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510 magic, version = header[0:2], header[2:4] |
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511 if magic != 'HG': |
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512 raise util.Abort(_('not a Mercurial bundle')) |
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513 if version != '2Y': |
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514 raise util.Abort(_('unknown bundle version %s') % version) |
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515 self.ui.debug('start processing of %s stream\n' % header) |
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516 |
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517 @util.propertycache |
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518 def params(self): |
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519 """dictionary of stream level parameters""" |
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520 self.ui.debug('reading bundle2 stream parameters\n') |
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521 params = {} |
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522 paramssize = self._unpack(_fstreamparamsize)[0] |
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523 if paramssize < 0: |
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524 raise error.BundleValueError('negative bundle param size: %i' |
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525 % paramssize) |
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526 if paramssize: |
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527 for p in self._readexact(paramssize).split(' '): |
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528 p = p.split('=', 1) |
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529 p = [urllib.unquote(i) for i in p] |
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530 if len(p) < 2: |
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531 p.append(None) |
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532 self._processparam(*p) |
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533 params[p[0]] = p[1] |
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534 return params |
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535 |
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536 def _processparam(self, name, value): |
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537 """process a parameter, applying its effect if needed |
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538 |
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539 Parameter starting with a lower case letter are advisory and will be |
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540 ignored when unknown. Those starting with an upper case letter are |
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541 mandatory and will this function will raise a KeyError when unknown. |
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542 |
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543 Note: no option are currently supported. Any input will be either |
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544 ignored or failing. |
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545 """ |
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546 if not name: |
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547 raise ValueError('empty parameter name') |
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548 if name[0] not in string.letters: |
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549 raise ValueError('non letter first character: %r' % name) |
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550 # Some logic will be later added here to try to process the option for |
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551 # a dict of known parameter. |
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552 if name[0].islower(): |
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553 self.ui.debug("ignoring unknown parameter %r\n" % name) |
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554 else: |
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555 raise error.UnsupportedPartError(params=(name,)) |
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556 |
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557 |
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558 def iterparts(self): |
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559 """yield all parts contained in the stream""" |
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560 # make sure param have been loaded |
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561 self.params |
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562 self.ui.debug('start extraction of bundle2 parts\n') |
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563 headerblock = self._readpartheader() |
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564 while headerblock is not None: |
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565 part = unbundlepart(self.ui, headerblock, self._fp) |
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566 yield part |
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567 headerblock = self._readpartheader() |
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568 self.ui.debug('end of bundle2 stream\n') |
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569 |
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570 def _readpartheader(self): |
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571 """reads a part header size and return the bytes blob |
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572 |
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573 returns None if empty""" |
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574 headersize = self._unpack(_fpartheadersize)[0] |
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575 if headersize < 0: |
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576 raise error.BundleValueError('negative part header size: %i' |
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577 % headersize) |
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578 self.ui.debug('part header size: %i\n' % headersize) |
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579 if headersize: |
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580 return self._readexact(headersize) |
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581 return None |
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582 |
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583 |
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584 class bundlepart(object): |
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585 """A bundle2 part contains application level payload |
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586 |
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587 The part `type` is used to route the part to the application level |
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588 handler. |
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589 |
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590 The part payload is contained in ``part.data``. It could be raw bytes or a |
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591 generator of byte chunks. |
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592 |
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593 You can add parameters to the part using the ``addparam`` method. |
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594 Parameters can be either mandatory (default) or advisory. Remote side |
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595 should be able to safely ignore the advisory ones. |
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596 |
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597 Both data and parameters cannot be modified after the generation has begun. |
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598 """ |
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599 |
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600 def __init__(self, parttype, mandatoryparams=(), advisoryparams=(), |
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601 data='', mandatory=True): |
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602 validateparttype(parttype) |
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603 self.id = None |
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604 self.type = parttype |
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605 self._data = data |
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606 self._mandatoryparams = list(mandatoryparams) |
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607 self._advisoryparams = list(advisoryparams) |
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608 # checking for duplicated entries |
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609 self._seenparams = set() |
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610 for pname, __ in self._mandatoryparams + self._advisoryparams: |
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611 if pname in self._seenparams: |
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612 raise RuntimeError('duplicated params: %s' % pname) |
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613 self._seenparams.add(pname) |
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614 # status of the part's generation: |
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615 # - None: not started, |
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616 # - False: currently generated, |
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617 # - True: generation done. |
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618 self._generated = None |
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619 self.mandatory = mandatory |
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620 |
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621 # methods used to defines the part content |
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622 def __setdata(self, data): |
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623 if self._generated is not None: |
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624 raise error.ReadOnlyPartError('part is being generated') |
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625 self._data = data |
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626 def __getdata(self): |
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627 return self._data |
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628 data = property(__getdata, __setdata) |
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629 |
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630 @property |
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631 def mandatoryparams(self): |
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632 # make it an immutable tuple to force people through ``addparam`` |
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633 return tuple(self._mandatoryparams) |
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634 |
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635 @property |
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636 def advisoryparams(self): |
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637 # make it an immutable tuple to force people through ``addparam`` |
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638 return tuple(self._advisoryparams) |
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639 |
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640 def addparam(self, name, value='', mandatory=True): |
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641 if self._generated is not None: |
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642 raise error.ReadOnlyPartError('part is being generated') |
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643 if name in self._seenparams: |
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644 raise ValueError('duplicated params: %s' % name) |
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645 self._seenparams.add(name) |
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646 params = self._advisoryparams |
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647 if mandatory: |
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648 params = self._mandatoryparams |
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649 params.append((name, value)) |
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650 |
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651 # methods used to generates the bundle2 stream |
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652 def getchunks(self): |
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653 if self._generated is not None: |
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654 raise RuntimeError('part can only be consumed once') |
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655 self._generated = False |
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656 #### header |
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657 if self.mandatory: |
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658 parttype = self.type.upper() |
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659 else: |
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660 parttype = self.type.lower() |
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661 ## parttype |
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662 header = [_pack(_fparttypesize, len(parttype)), |
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663 parttype, _pack(_fpartid, self.id), |
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664 ] |
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665 ## parameters |
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666 # count |
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667 manpar = self.mandatoryparams |
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668 advpar = self.advisoryparams |
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669 header.append(_pack(_fpartparamcount, len(manpar), len(advpar))) |
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670 # size |
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671 parsizes = [] |
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672 for key, value in manpar: |
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673 parsizes.append(len(key)) |
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674 parsizes.append(len(value)) |
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675 for key, value in advpar: |
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676 parsizes.append(len(key)) |
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677 parsizes.append(len(value)) |
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678 paramsizes = _pack(_makefpartparamsizes(len(parsizes) / 2), *parsizes) |
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679 header.append(paramsizes) |
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680 # key, value |
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681 for key, value in manpar: |
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682 header.append(key) |
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683 header.append(value) |
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684 for key, value in advpar: |
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685 header.append(key) |
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686 header.append(value) |
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687 ## finalize header |
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688 headerchunk = ''.join(header) |
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689 yield _pack(_fpartheadersize, len(headerchunk)) |
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690 yield headerchunk |
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691 ## payload |
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692 try: |
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693 for chunk in self._payloadchunks(): |
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694 yield _pack(_fpayloadsize, len(chunk)) |
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695 yield chunk |
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696 except Exception, exc: |
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697 # backup exception data for later |
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698 exc_info = sys.exc_info() |
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699 msg = 'unexpected error: %s' % exc |
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700 interpart = bundlepart('b2x:error:abort', [('message', msg)], |
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701 mandatory=False) |
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702 interpart.id = 0 |
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703 yield _pack(_fpayloadsize, -1) |
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704 for chunk in interpart.getchunks(): |
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705 yield chunk |
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706 # abort current part payload |
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707 yield _pack(_fpayloadsize, 0) |
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708 raise exc_info[0], exc_info[1], exc_info[2] |
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709 # end of payload |
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710 yield _pack(_fpayloadsize, 0) |
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711 self._generated = True |
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712 |
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713 def _payloadchunks(self): |
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714 """yield chunks of a the part payload |
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715 |
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716 Exists to handle the different methods to provide data to a part.""" |
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717 # we only support fixed size data now. |
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718 # This will be improved in the future. |
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719 if util.safehasattr(self.data, 'next'): |
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720 buff = util.chunkbuffer(self.data) |
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721 chunk = buff.read(preferedchunksize) |
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722 while chunk: |
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723 yield chunk |
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724 chunk = buff.read(preferedchunksize) |
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725 elif len(self.data): |
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726 yield self.data |
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727 |
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|
728 |
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729 flaginterrupt = -1 |
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730 |
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731 class interrupthandler(unpackermixin): |
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732 """read one part and process it with restricted capability |
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733 |
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734 This allows to transmit exception raised on the producer size during part |
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735 iteration while the consumer is reading a part. |
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736 |
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737 Part processed in this manner only have access to a ui object,""" |
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738 |
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739 def __init__(self, ui, fp): |
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740 super(interrupthandler, self).__init__(fp) |
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741 self.ui = ui |
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742 |
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743 def _readpartheader(self): |
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744 """reads a part header size and return the bytes blob |
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745 |
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746 returns None if empty""" |
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747 headersize = self._unpack(_fpartheadersize)[0] |
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748 if headersize < 0: |
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749 raise error.BundleValueError('negative part header size: %i' |
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750 % headersize) |
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751 self.ui.debug('part header size: %i\n' % headersize) |
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752 if headersize: |
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753 return self._readexact(headersize) |
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754 return None |
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|
755 |
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756 def __call__(self): |
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757 self.ui.debug('bundle2 stream interruption, looking for a part.\n') |
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758 headerblock = self._readpartheader() |
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|
759 if headerblock is None: |
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|
760 self.ui.debug('no part found during interruption.\n') |
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761 return |
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762 part = unbundlepart(self.ui, headerblock, self._fp) |
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763 op = interruptoperation(self.ui) |
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764 _processpart(op, part) |
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|
765 |
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|
766 class interruptoperation(object): |
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767 """A limited operation to be use by part handler during interruption |
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768 |
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769 It only have access to an ui object. |
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770 """ |
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771 |
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772 def __init__(self, ui): |
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773 self.ui = ui |
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774 self.reply = None |
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775 |
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776 @property |
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777 def repo(self): |
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778 raise RuntimeError('no repo access from stream interruption') |
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779 |
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780 def gettransaction(self): |
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781 raise TransactionUnavailable('no repo access from stream interruption') |
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782 |
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783 class unbundlepart(unpackermixin): |
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784 """a bundle part read from a bundle""" |
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785 |
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786 def __init__(self, ui, header, fp): |
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787 super(unbundlepart, self).__init__(fp) |
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788 self.ui = ui |
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789 # unbundle state attr |
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790 self._headerdata = header |
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791 self._headeroffset = 0 |
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792 self._initialized = False |
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793 self.consumed = False |
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794 # part data |
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795 self.id = None |
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796 self.type = None |
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797 self.mandatoryparams = None |
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798 self.advisoryparams = None |
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799 self.params = None |
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800 self.mandatorykeys = () |
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801 self._payloadstream = None |
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802 self._readheader() |
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803 self._mandatory = None |
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804 |
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805 def _fromheader(self, size): |
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806 """return the next <size> byte from the header""" |
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807 offset = self._headeroffset |
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808 data = self._headerdata[offset:(offset + size)] |
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809 self._headeroffset = offset + size |
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810 return data |
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811 |
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812 def _unpackheader(self, format): |
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813 """read given format from header |
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814 |
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815 This automatically compute the size of the format to read.""" |
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816 data = self._fromheader(struct.calcsize(format)) |
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817 return _unpack(format, data) |
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818 |
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819 def _initparams(self, mandatoryparams, advisoryparams): |
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820 """internal function to setup all logic related parameters""" |
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821 # make it read only to prevent people touching it by mistake. |
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822 self.mandatoryparams = tuple(mandatoryparams) |
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823 self.advisoryparams = tuple(advisoryparams) |
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824 # user friendly UI |
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825 self.params = dict(self.mandatoryparams) |
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826 self.params.update(dict(self.advisoryparams)) |
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827 self.mandatorykeys = frozenset(p[0] for p in mandatoryparams) |
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828 |
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829 def _readheader(self): |
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830 """read the header and setup the object""" |
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831 typesize = self._unpackheader(_fparttypesize)[0] |
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832 self.type = self._fromheader(typesize) |
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833 self.ui.debug('part type: "%s"\n' % self.type) |
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834 self.id = self._unpackheader(_fpartid)[0] |
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835 self.ui.debug('part id: "%s"\n' % self.id) |
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836 # extract mandatory bit from type |
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837 self.mandatory = (self.type != self.type.lower()) |
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838 self.type = self.type.lower() |
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839 ## reading parameters |
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840 # param count |
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841 mancount, advcount = self._unpackheader(_fpartparamcount) |
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842 self.ui.debug('part parameters: %i\n' % (mancount + advcount)) |
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843 # param size |
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844 fparamsizes = _makefpartparamsizes(mancount + advcount) |
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845 paramsizes = self._unpackheader(fparamsizes) |
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846 # make it a list of couple again |
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847 paramsizes = zip(paramsizes[::2], paramsizes[1::2]) |
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848 # split mandatory from advisory |
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849 mansizes = paramsizes[:mancount] |
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850 advsizes = paramsizes[mancount:] |
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851 # retrieve param value |
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852 manparams = [] |
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853 for key, value in mansizes: |
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854 manparams.append((self._fromheader(key), self._fromheader(value))) |
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855 advparams = [] |
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856 for key, value in advsizes: |
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857 advparams.append((self._fromheader(key), self._fromheader(value))) |
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858 self._initparams(manparams, advparams) |
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859 ## part payload |
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860 def payloadchunks(): |
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861 payloadsize = self._unpack(_fpayloadsize)[0] |
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862 self.ui.debug('payload chunk size: %i\n' % payloadsize) |
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863 while payloadsize: |
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864 if payloadsize == flaginterrupt: |
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865 # interruption detection, the handler will now read a |
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866 # single part and process it. |
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867 interrupthandler(self.ui, self._fp)() |
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868 elif payloadsize < 0: |
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869 msg = 'negative payload chunk size: %i' % payloadsize |
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870 raise error.BundleValueError(msg) |
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871 else: |
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872 yield self._readexact(payloadsize) |
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873 payloadsize = self._unpack(_fpayloadsize)[0] |
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874 self.ui.debug('payload chunk size: %i\n' % payloadsize) |
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875 self._payloadstream = util.chunkbuffer(payloadchunks()) |
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876 # we read the data, tell it |
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877 self._initialized = True |
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878 |
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879 def read(self, size=None): |
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880 """read payload data""" |
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881 if not self._initialized: |
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882 self._readheader() |
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883 if size is None: |
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884 data = self._payloadstream.read() |
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885 else: |
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886 data = self._payloadstream.read(size) |
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887 if size is None or len(data) < size: |
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888 self.consumed = True |
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889 return data |
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890 |
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891 capabilities = {'HG2Y': (), |
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892 'b2x:listkeys': (), |
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893 'b2x:pushkey': (), |
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894 'digests': tuple(sorted(util.DIGESTS.keys())), |
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895 'b2x:remote-changegroup': ('http', 'https'), |
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896 } |
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897 |
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898 def getrepocaps(repo, allowpushback=False): |
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899 """return the bundle2 capabilities for a given repo |
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900 |
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901 Exists to allow extensions (like evolution) to mutate the capabilities. |
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902 """ |
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903 caps = capabilities.copy() |
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|
904 caps['b2x:changegroup'] = tuple(sorted(changegroup.packermap.keys())) |
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|
905 if obsolete.isenabled(repo, obsolete.exchangeopt): |
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906 supportedformat = tuple('V%i' % v for v in obsolete.formats) |
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907 caps['b2x:obsmarkers'] = supportedformat |
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908 if allowpushback: |
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909 caps['b2x:pushback'] = () |
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910 return caps |
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911 |
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|
912 def bundle2caps(remote): |
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913 """return the bundle capabilities of a peer as dict""" |
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914 raw = remote.capable('bundle2-exp') |
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|
915 if not raw and raw != '': |
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916 return {} |
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|
917 capsblob = urllib.unquote(remote.capable('bundle2-exp')) |
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|
918 return decodecaps(capsblob) |
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|
919 |
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920 def obsmarkersversion(caps): |
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921 """extract the list of supported obsmarkers versions from a bundle2caps dict |
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922 """ |
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|
923 obscaps = caps.get('b2x:obsmarkers', ()) |
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924 return [int(c[1:]) for c in obscaps if c.startswith('V')] |
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|
925 |
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|
926 @parthandler('b2x:changegroup', ('version',)) |
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|
927 def handlechangegroup(op, inpart): |
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928 """apply a changegroup part on the repo |
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929 |
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930 This is a very early implementation that will massive rework before being |
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|
931 inflicted to any end-user. |
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|
932 """ |
20952
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|
933 # Make sure we trigger a transaction creation |
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934 # |
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|
935 # The addchangegroup function will get a transaction object by itself, but |
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|
936 # we need to make sure we trigger the creation of a transaction object used |
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|
937 # for the whole processing scope. |
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|
938 op.gettransaction() |
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|
939 unpackerversion = inpart.params.get('version', '01') |
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|
940 # We should raise an appropriate exception here |
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|
941 unpacker = changegroup.packermap[unpackerversion][1] |
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|
942 cg = unpacker(inpart, 'UN') |
23001
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22953
diff
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|
943 # the source and url passed here are overwritten by the one contained in |
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diff
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|
944 # the transaction.hookargs argument. So 'bundle2' is a placeholder |
20950
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|
945 ret = changegroup.addchangegroup(op.repo, cg, 'bundle2', 'bundle2') |
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|
946 op.records.add('changegroup', {'return': ret}) |
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diff
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|
947 if op.reply is not None: |
23139
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Mads Kiilerich <madski@unity3d.com>
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23067
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|
948 # This is definitely not the final form of this |
20998
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diff
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|
949 # return. But one need to start somewhere. |
23590
4440c7cc3728
bundle2.bundlepart: make mandatory part flag explicit in API
Eric Sumner <ericsumner@fb.com>
parents:
23586
diff
changeset
|
950 part = op.reply.newpart('b2x:reply:changegroup', mandatory=False) |
21606
e55888447958
bundle2: update part creators to ``addparam`` when relevant
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diff
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|
951 part.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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|
952 part.addparam('return', '%i' % ret, mandatory=False) |
21019
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|
953 assert not inpart.read() |
20950
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|
954 |
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|
955 _remotechangegroupparams = tuple(['url', 'size', 'digests'] + |
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|
956 ['digest:%s' % k for k in util.DIGESTS.keys()]) |
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|
957 @parthandler('b2x:remote-changegroup', _remotechangegroupparams) |
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|
958 def handleremotechangegroup(op, inpart): |
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|
959 """apply a bundle10 on the repo, given an url and validation information |
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|
960 |
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|
961 All the information about the remote bundle to import are given as |
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|
962 parameters. The parameters include: |
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|
963 - url: the url to the bundle10. |
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|
964 - size: the bundle10 file size. It is used to validate what was |
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|
965 retrieved by the client matches the server knowledge about the bundle. |
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|
966 - digests: a space separated list of the digest types provided as |
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|
967 parameters. |
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|
968 - digest:<digest-type>: the hexadecimal representation of the digest with |
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|
969 that name. Like the size, it is used to validate what was retrieved by |
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|
970 the client matches what the server knows about the bundle. |
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|
971 |
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|
972 When multiple digest types are given, all of them are checked. |
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|
973 """ |
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|
974 try: |
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changeset
|
975 raw_url = inpart.params['url'] |
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|
976 except KeyError: |
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changeset
|
977 raise util.Abort(_('remote-changegroup: missing "%s" param') % 'url') |
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|
978 parsed_url = util.url(raw_url) |
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979 if parsed_url.scheme not in capabilities['b2x:remote-changegroup']: |
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980 raise util.Abort(_('remote-changegroup does not support %s urls') % |
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981 parsed_url.scheme) |
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982 |
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983 try: |
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984 size = int(inpart.params['size']) |
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985 except ValueError: |
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986 raise util.Abort(_('remote-changegroup: invalid value for param "%s"') |
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987 % 'size') |
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988 except KeyError: |
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989 raise util.Abort(_('remote-changegroup: missing "%s" param') % 'size') |
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990 |
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991 digests = {} |
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992 for typ in inpart.params.get('digests', '').split(): |
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993 param = 'digest:%s' % typ |
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994 try: |
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995 value = inpart.params[param] |
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996 except KeyError: |
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997 raise util.Abort(_('remote-changegroup: missing "%s" param') % |
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998 param) |
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999 digests[typ] = value |
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1000 |
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1001 real_part = util.digestchecker(url.open(op.ui, raw_url), size, digests) |
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1002 |
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1003 # Make sure we trigger a transaction creation |
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1004 # |
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1005 # The addchangegroup function will get a transaction object by itself, but |
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1006 # we need to make sure we trigger the creation of a transaction object used |
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1007 # for the whole processing scope. |
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1008 op.gettransaction() |
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1009 import exchange |
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1010 cg = exchange.readbundle(op.repo.ui, real_part, raw_url) |
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1011 if not isinstance(cg, changegroup.cg1unpacker): |
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1012 raise util.Abort(_('%s: not a bundle version 1.0') % |
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1013 util.hidepassword(raw_url)) |
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1014 ret = changegroup.addchangegroup(op.repo, cg, 'bundle2', 'bundle2') |
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1015 op.records.add('changegroup', {'return': ret}) |
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1016 if op.reply is not None: |
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1017 # This is definitely not the final form of this |
23029
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1018 # return. But one need to start somewhere. |
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1019 part = op.reply.newpart('b2x:reply:changegroup') |
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1020 part.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1021 part.addparam('return', '%i' % ret, mandatory=False) |
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1022 try: |
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1023 real_part.validate() |
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1024 except util.Abort, e: |
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1025 raise util.Abort(_('bundle at %s is corrupted:\n%s') % |
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1026 (util.hidepassword(raw_url), str(e))) |
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1027 assert not inpart.read() |
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1028 |
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1029 @parthandler('b2x:reply:changegroup', ('return', 'in-reply-to')) |
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1030 def handlereplychangegroup(op, inpart): |
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1031 ret = int(inpart.params['return']) |
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1032 replyto = int(inpart.params['in-reply-to']) |
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1033 op.records.add('changegroup', {'return': ret}, replyto) |
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1034 |
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1035 @parthandler('b2x:check:heads') |
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1036 def handlecheckheads(op, inpart): |
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1037 """check that head of the repo did not change |
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1038 |
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1039 This is used to detect a push race when using unbundle. |
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1040 This replaces the "heads" argument of unbundle.""" |
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1041 h = inpart.read(20) |
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1042 heads = [] |
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1043 while len(h) == 20: |
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1044 heads.append(h) |
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1045 h = inpart.read(20) |
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1046 assert not h |
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1047 if heads != op.repo.heads(): |
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1048 raise error.PushRaced('repository changed while pushing - ' |
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1049 'please try again') |
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1050 |
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1051 @parthandler('b2x:output') |
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1052 def handleoutput(op, inpart): |
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1053 """forward output captured on the server to the client""" |
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1054 for line in inpart.read().splitlines(): |
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1055 op.ui.write(('remote: %s\n' % line)) |
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1056 |
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1057 @parthandler('b2x:replycaps') |
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1058 def handlereplycaps(op, inpart): |
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1059 """Notify that a reply bundle should be created |
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1060 |
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|
1061 The payload contains the capabilities information for the reply""" |
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1062 caps = decodecaps(inpart.read()) |
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1063 if op.reply is None: |
21135
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diff
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|
1064 op.reply = bundle20(op.ui, caps) |
21131
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1065 |
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1066 @parthandler('b2x:error:abort', ('message', 'hint')) |
21177
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|
1067 def handlereplycaps(op, inpart): |
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1068 """Used to transmit abort error over the wire""" |
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|
1069 raise util.Abort(inpart.params['message'], hint=inpart.params.get('hint')) |
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|
1070 |
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1071 @parthandler('b2x:error:unsupportedcontent', ('parttype', 'params')) |
21183
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|
1072 def handlereplycaps(op, inpart): |
21619
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21618
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|
1073 """Used to transmit unknown content error over the wire""" |
21622
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|
1074 kwargs = {} |
21627
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|
1075 parttype = inpart.params.get('parttype') |
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|
1076 if parttype is not None: |
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|
1077 kwargs['parttype'] = parttype |
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1078 params = inpart.params.get('params') |
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1079 if params is not None: |
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|
1080 kwargs['params'] = params.split('\0') |
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|
1081 |
23010
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diff
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|
1082 raise error.UnsupportedPartError(**kwargs) |
21186
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|
1083 |
21623
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|
1084 @parthandler('b2x:error:pushraced', ('message',)) |
21186
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1085 def handlereplycaps(op, inpart): |
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|
1086 """Used to transmit push race error over the wire""" |
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1087 raise error.ResponseError(_('push failed:'), inpart.params['message']) |
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1088 |
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1089 @parthandler('b2x:listkeys', ('namespace',)) |
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1090 def handlelistkeys(op, inpart): |
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1091 """retrieve pushkey namespace content stored in a bundle2""" |
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1092 namespace = inpart.params['namespace'] |
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1093 r = pushkey.decodekeys(inpart.read()) |
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1094 op.records.add('listkeys', (namespace, r)) |
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1095 |
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1096 @parthandler('b2x:pushkey', ('namespace', 'key', 'old', 'new')) |
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1097 def handlepushkey(op, inpart): |
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1098 """process a pushkey request""" |
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1099 dec = pushkey.decode |
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1100 namespace = dec(inpart.params['namespace']) |
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1101 key = dec(inpart.params['key']) |
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1102 old = dec(inpart.params['old']) |
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1103 new = dec(inpart.params['new']) |
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1104 ret = op.repo.pushkey(namespace, key, old, new) |
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1105 record = {'namespace': namespace, |
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1106 'key': key, |
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1107 'old': old, |
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1108 'new': new} |
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1109 op.records.add('pushkey', record) |
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1110 if op.reply is not None: |
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1111 rpart = op.reply.newpart('b2x:reply:pushkey') |
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1112 rpart.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1113 rpart.addparam('return', '%i' % ret, mandatory=False) |
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1114 |
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1115 @parthandler('b2x:reply:pushkey', ('return', 'in-reply-to')) |
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1116 def handlepushkeyreply(op, inpart): |
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1117 """retrieve the result of a pushkey request""" |
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1118 ret = int(inpart.params['return']) |
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1119 partid = int(inpart.params['in-reply-to']) |
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1120 op.records.add('pushkey', {'return': ret}, partid) |
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1121 |
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1122 @parthandler('b2x:obsmarkers') |
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1123 def handleobsmarker(op, inpart): |
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1124 """add a stream of obsmarkers to the repo""" |
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1125 tr = op.gettransaction() |
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1126 new = op.repo.obsstore.mergemarkers(tr, inpart.read()) |
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1127 if new: |
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1128 op.repo.ui.status(_('%i new obsolescence markers\n') % new) |
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1129 op.records.add('obsmarkers', {'new': new}) |
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1130 if op.reply is not None: |
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1131 rpart = op.reply.newpart('b2x:reply:obsmarkers') |
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1132 rpart.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1133 rpart.addparam('new', '%i' % new, mandatory=False) |
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1134 |
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1135 |
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1136 @parthandler('b2x:reply:obsmarkers', ('new', 'in-reply-to')) |
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1137 def handlepushkeyreply(op, inpart): |
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1138 """retrieve the result of a pushkey request""" |
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1139 ret = int(inpart.params['new']) |
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1140 partid = int(inpart.params['in-reply-to']) |
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1141 op.records.add('obsmarkers', {'new': ret}, partid) |