Mercurial > hg
annotate mercurial/bundle2.py @ 26478:a3f7e5461dbd
util.chunkbuffer: special case reading everything
The new code results in simpler logic within the while loop. It is also
faster since we avoid performing operations on the queue and buf
collections. However, there shouldn't be any super hot loops for this
since the whole point of chunkbuffer is to avoid reading large amounts
of data at once. This does, however, make it easier to optimize
chunkbuffer in a subsequent patch.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 05 Oct 2015 16:28:12 -0700 |
parents | 795f02a24b87 |
children | d40029b4296e |
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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52 |
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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 header. 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 from __future__ import absolute_import |
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149 |
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150 import errno |
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151 import re |
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152 import string |
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153 import struct |
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154 import sys |
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155 import urllib |
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156 |
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157 from .i18n import _ |
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158 from . import ( |
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159 changegroup, |
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160 error, |
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161 obsolete, |
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162 pushkey, |
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163 tags, |
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164 url, |
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165 util, |
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166 ) |
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167 |
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168 _pack = struct.pack |
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169 _unpack = struct.unpack |
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170 |
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171 _fstreamparamsize = '>i' |
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172 _fpartheadersize = '>i' |
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173 _fparttypesize = '>B' |
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174 _fpartid = '>I' |
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175 _fpayloadsize = '>i' |
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176 _fpartparamcount = '>BB' |
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177 |
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178 preferedchunksize = 4096 |
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179 |
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180 _parttypeforbidden = re.compile('[^a-zA-Z0-9_:-]') |
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181 |
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182 def outdebug(ui, message): |
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183 """debug regarding output stream (bundling)""" |
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184 if ui.configbool('devel', 'bundle2.debug', False): |
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185 ui.debug('bundle2-output: %s\n' % message) |
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186 |
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187 def indebug(ui, message): |
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188 """debug on input stream (unbundling)""" |
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189 if ui.configbool('devel', 'bundle2.debug', False): |
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190 ui.debug('bundle2-input: %s\n' % message) |
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191 |
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192 def validateparttype(parttype): |
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193 """raise ValueError if a parttype contains invalid character""" |
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194 if _parttypeforbidden.search(parttype): |
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195 raise ValueError(parttype) |
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196 |
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197 def _makefpartparamsizes(nbparams): |
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198 """return a struct format to read part parameter sizes |
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199 |
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200 The number parameters is variable so we need to build that format |
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201 dynamically. |
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202 """ |
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203 return '>'+('BB'*nbparams) |
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204 |
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205 parthandlermapping = {} |
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206 |
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207 def parthandler(parttype, params=()): |
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208 """decorator that register a function as a bundle2 part handler |
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209 |
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210 eg:: |
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211 |
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212 @parthandler('myparttype', ('mandatory', 'param', 'handled')) |
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213 def myparttypehandler(...): |
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214 '''process a part of type "my part".''' |
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215 ... |
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216 """ |
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217 validateparttype(parttype) |
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218 def _decorator(func): |
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219 lparttype = parttype.lower() # enforce lower case matching. |
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220 assert lparttype not in parthandlermapping |
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221 parthandlermapping[lparttype] = func |
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222 func.params = frozenset(params) |
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223 return func |
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224 return _decorator |
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225 |
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226 class unbundlerecords(object): |
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227 """keep record of what happens during and unbundle |
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228 |
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229 New records are added using `records.add('cat', obj)`. Where 'cat' is a |
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230 category of record and obj is an arbitrary object. |
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231 |
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232 `records['cat']` will return all entries of this category 'cat'. |
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233 |
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234 Iterating on the object itself will yield `('category', obj)` tuples |
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235 for all entries. |
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236 |
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237 All iterations happens in chronological order. |
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238 """ |
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239 |
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240 def __init__(self): |
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241 self._categories = {} |
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242 self._sequences = [] |
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243 self._replies = {} |
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244 |
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245 def add(self, category, entry, inreplyto=None): |
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246 """add a new record of a given category. |
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247 |
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248 The entry can then be retrieved in the list returned by |
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249 self['category'].""" |
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250 self._categories.setdefault(category, []).append(entry) |
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251 self._sequences.append((category, entry)) |
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252 if inreplyto is not None: |
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253 self.getreplies(inreplyto).add(category, entry) |
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254 |
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255 def getreplies(self, partid): |
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256 """get the records that are replies to a specific part""" |
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257 return self._replies.setdefault(partid, unbundlerecords()) |
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258 |
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259 def __getitem__(self, cat): |
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260 return tuple(self._categories.get(cat, ())) |
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261 |
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262 def __iter__(self): |
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263 return iter(self._sequences) |
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264 |
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265 def __len__(self): |
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266 return len(self._sequences) |
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267 |
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268 def __nonzero__(self): |
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269 return bool(self._sequences) |
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270 |
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271 class bundleoperation(object): |
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272 """an object that represents a single bundling process |
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273 |
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274 Its purpose is to carry unbundle-related objects and states. |
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275 |
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276 A new object should be created at the beginning of each bundle processing. |
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277 The object is to be returned by the processing function. |
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278 |
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279 The object has very little content now it will ultimately contain: |
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280 * an access to the repo the bundle is applied to, |
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281 * a ui object, |
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282 * a way to retrieve a transaction to add changes to the repo, |
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283 * a way to record the result of processing each part, |
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284 * a way to construct a bundle response when applicable. |
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285 """ |
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286 |
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287 def __init__(self, repo, transactiongetter, captureoutput=True): |
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288 self.repo = repo |
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289 self.ui = repo.ui |
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290 self.records = unbundlerecords() |
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291 self.gettransaction = transactiongetter |
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292 self.reply = None |
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293 self.captureoutput = captureoutput |
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294 |
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295 class TransactionUnavailable(RuntimeError): |
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296 pass |
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297 |
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298 def _notransaction(): |
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299 """default method to get a transaction while processing a bundle |
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300 |
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301 Raise an exception to highlight the fact that no transaction was expected |
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302 to be created""" |
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303 raise TransactionUnavailable() |
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304 |
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305 def processbundle(repo, unbundler, transactiongetter=None, op=None): |
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306 """This function process a bundle, apply effect to/from a repo |
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307 |
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308 It iterates over each part then searches for and uses the proper handling |
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309 code to process the part. Parts are processed in order. |
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310 |
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311 This is very early version of this function that will be strongly reworked |
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312 before final usage. |
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313 |
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314 Unknown Mandatory part will abort the process. |
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315 |
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316 It is temporarily possible to provide a prebuilt bundleoperation to the |
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317 function. This is used to ensure output is properly propagated in case of |
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318 an error during the unbundling. This output capturing part will likely be |
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319 reworked and this ability will probably go away in the process. |
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320 """ |
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321 if op is None: |
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322 if transactiongetter is None: |
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323 transactiongetter = _notransaction |
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324 op = bundleoperation(repo, transactiongetter) |
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325 # todo: |
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326 # - replace this is a init function soon. |
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327 # - exception catching |
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328 unbundler.params |
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329 if repo.ui.debugflag: |
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330 msg = ['bundle2-input-bundle:'] |
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331 if unbundler.params: |
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332 msg.append(' %i params') |
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333 if op.gettransaction is None: |
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334 msg.append(' no-transaction') |
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335 else: |
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336 msg.append(' with-transaction') |
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337 msg.append('\n') |
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338 repo.ui.debug(''.join(msg)) |
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339 iterparts = enumerate(unbundler.iterparts()) |
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340 part = None |
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341 nbpart = 0 |
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342 try: |
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343 for nbpart, part in iterparts: |
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344 _processpart(op, part) |
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345 except BaseException as exc: |
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346 for nbpart, part in iterparts: |
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347 # consume the bundle content |
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348 part.seek(0, 2) |
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349 # Small hack to let caller code distinguish exceptions from bundle2 |
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350 # processing from processing the old format. This is mostly |
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351 # needed to handle different return codes to unbundle according to the |
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352 # type of bundle. We should probably clean up or drop this return code |
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353 # craziness in a future version. |
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354 exc.duringunbundle2 = True |
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355 salvaged = [] |
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356 replycaps = None |
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357 if op.reply is not None: |
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358 salvaged = op.reply.salvageoutput() |
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359 replycaps = op.reply.capabilities |
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360 exc._replycaps = replycaps |
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361 exc._bundle2salvagedoutput = salvaged |
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362 raise |
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363 finally: |
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364 repo.ui.debug('bundle2-input-bundle: %i parts total\n' % nbpart) |
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365 |
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366 return op |
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367 |
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368 def _processpart(op, part): |
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369 """process a single part from a bundle |
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370 |
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371 The part is guaranteed to have been fully consumed when the function exits |
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372 (even if an exception is raised).""" |
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373 status = 'unknown' # used by debug output |
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374 try: |
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375 try: |
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376 handler = parthandlermapping.get(part.type) |
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377 if handler is None: |
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378 status = 'unsupported-type' |
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379 raise error.BundleUnknownFeatureError(parttype=part.type) |
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380 indebug(op.ui, 'found a handler for part %r' % part.type) |
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381 unknownparams = part.mandatorykeys - handler.params |
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382 if unknownparams: |
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383 unknownparams = list(unknownparams) |
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384 unknownparams.sort() |
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385 status = 'unsupported-params (%s)' % unknownparams |
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386 raise error.BundleUnknownFeatureError(parttype=part.type, |
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387 params=unknownparams) |
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388 status = 'supported' |
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389 except error.BundleUnknownFeatureError as exc: |
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390 if part.mandatory: # mandatory parts |
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391 raise |
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392 indebug(op.ui, 'ignoring unsupported advisory part %s' % exc) |
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393 return # skip to part processing |
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394 finally: |
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395 if op.ui.debugflag: |
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396 msg = ['bundle2-input-part: "%s"' % part.type] |
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397 if not part.mandatory: |
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398 msg.append(' (advisory)') |
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399 nbmp = len(part.mandatorykeys) |
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400 nbap = len(part.params) - nbmp |
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401 if nbmp or nbap: |
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402 msg.append(' (params:') |
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403 if nbmp: |
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404 msg.append(' %i mandatory' % nbmp) |
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405 if nbap: |
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406 msg.append(' %i advisory' % nbmp) |
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407 msg.append(')') |
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408 msg.append(' %s\n' % status) |
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409 op.ui.debug(''.join(msg)) |
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410 |
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411 # handler is called outside the above try block so that we don't |
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412 # risk catching KeyErrors from anything other than the |
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413 # parthandlermapping lookup (any KeyError raised by handler() |
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414 # itself represents a defect of a different variety). |
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415 output = None |
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416 if op.captureoutput and op.reply is not None: |
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417 op.ui.pushbuffer(error=True, subproc=True) |
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418 output = '' |
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419 try: |
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420 handler(op, part) |
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421 finally: |
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422 if output is not None: |
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423 output = op.ui.popbuffer() |
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424 if output: |
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425 outpart = op.reply.newpart('output', data=output, |
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426 mandatory=False) |
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427 outpart.addparam('in-reply-to', str(part.id), mandatory=False) |
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428 finally: |
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429 # consume the part content to not corrupt the stream. |
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430 part.seek(0, 2) |
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431 |
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432 |
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433 def decodecaps(blob): |
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434 """decode a bundle2 caps bytes blob into a dictionary |
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435 |
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436 The blob is a list of capabilities (one per line) |
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437 Capabilities may have values using a line of the form:: |
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438 |
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439 capability=value1,value2,value3 |
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440 |
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441 The values are always a list.""" |
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442 caps = {} |
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443 for line in blob.splitlines(): |
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444 if not line: |
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445 continue |
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446 if '=' not in line: |
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447 key, vals = line, () |
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448 else: |
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449 key, vals = line.split('=', 1) |
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450 vals = vals.split(',') |
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451 key = urllib.unquote(key) |
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452 vals = [urllib.unquote(v) for v in vals] |
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453 caps[key] = vals |
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454 return caps |
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|
455 |
21139
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456 def encodecaps(caps): |
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457 """encode a bundle2 caps dictionary into a bytes blob""" |
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458 chunks = [] |
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459 for ca in sorted(caps): |
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460 vals = caps[ca] |
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461 ca = urllib.quote(ca) |
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462 vals = [urllib.quote(v) for v in vals] |
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463 if vals: |
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464 ca = "%s=%s" % (ca, ','.join(vals)) |
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465 chunks.append(ca) |
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466 return '\n'.join(chunks) |
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467 |
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468 class bundle20(object): |
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469 """represent an outgoing bundle2 container |
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470 |
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471 Use the `addparam` method to add stream level parameter. and `newpart` to |
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472 populate it. Then call `getchunks` to retrieve all the binary chunks of |
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473 data that compose the bundle2 container.""" |
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474 |
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475 _magicstring = 'HG20' |
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476 |
21134
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477 def __init__(self, ui, capabilities=()): |
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478 self.ui = ui |
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479 self._params = [] |
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480 self._parts = [] |
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481 self.capabilities = dict(capabilities) |
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482 self._compressor = util.compressors[None]() |
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483 |
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484 def setcompression(self, alg): |
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485 """setup core part compression to <alg>""" |
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486 if alg is None: |
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487 return |
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|
488 assert not any(n.lower() == 'Compression' for n, v in self._params) |
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489 self.addparam('Compression', alg) |
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490 self._compressor = util.compressors[alg]() |
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|
491 |
21900
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492 @property |
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493 def nbparts(self): |
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494 """total number of parts added to the bundler""" |
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diff
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495 return len(self._parts) |
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diff
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|
496 |
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diff
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497 # methods used to defines the bundle2 content |
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498 def addparam(self, name, value=None): |
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20803
diff
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499 """add a stream level parameter""" |
20813
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20812
diff
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|
500 if not name: |
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diff
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|
501 raise ValueError('empty parameter name') |
20814
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diff
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|
502 if name[0] not in string.letters: |
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|
503 raise ValueError('non letter first character: %r' % name) |
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504 self._params.append((name, value)) |
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|
505 |
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506 def addpart(self, part): |
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507 """add a new part to the bundle2 container |
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|
508 |
21024
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parents:
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diff
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|
509 Parts contains the actual applicative payload.""" |
20995
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diff
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|
510 assert part.id is None |
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511 part.id = len(self._parts) # very cheap counter |
20856
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|
512 self._parts.append(part) |
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diff
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|
513 |
21598
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|
514 def newpart(self, typeid, *args, **kwargs): |
21602
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|
515 """create a new part and add it to the containers |
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|
516 |
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diff
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|
517 As the part is directly added to the containers. For now, this means |
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diff
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|
518 that any failure to properly initialize the part after calling |
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|
519 ``newpart`` should result in a failure of the whole bundling process. |
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|
520 |
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diff
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|
521 You can still fall back to manually create and add if you need better |
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|
522 control.""" |
21598
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|
523 part = bundlepart(typeid, *args, **kwargs) |
21599
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diff
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|
524 self.addpart(part) |
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diff
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|
525 return part |
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diff
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|
526 |
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diff
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|
527 # methods used to generate the bundle2 stream |
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|
528 def getchunks(self): |
25322
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|
529 if self.ui.debugflag: |
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|
530 msg = ['bundle2-output-bundle: "%s",' % self._magicstring] |
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|
531 if self._params: |
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|
532 msg.append(' (%i params)' % len(self._params)) |
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|
533 msg.append(' %i parts total\n' % len(self._parts)) |
1f7c0403f8be
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|
534 self.ui.debug(''.join(msg)) |
25315
e28245b0da56
bundle2: handle new line in 'outdebug' function
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25314
diff
changeset
|
535 outdebug(self.ui, 'start emission of %s stream' % self._magicstring) |
24640
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diff
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|
536 yield self._magicstring |
20804
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|
537 param = self._paramchunk() |
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diff
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|
538 outdebug(self.ui, 'bundle parameter: %s' % param) |
20804
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|
539 yield _pack(_fstreamparamsize, len(param)) |
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540 if param: |
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|
541 yield param |
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|
542 # starting compression |
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|
543 for chunk in self._getcorechunk(): |
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|
544 yield self._compressor.compress(chunk) |
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|
545 yield self._compressor.flush() |
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520df53ad26a
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diff
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|
546 |
20804
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|
547 def _paramchunk(self): |
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|
548 """return a encoded version of all stream parameters""" |
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diff
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|
549 blocks = [] |
20809
b93bb639451a
bundle2: support for bundling parameter value
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parents:
20808
diff
changeset
|
550 for par, value in self._params: |
20811
9785c3f8f598
bundle2: urlquote stream parameter name and value
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551 par = urllib.quote(par) |
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552 if value is not None: |
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553 value = urllib.quote(value) |
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554 par = '%s=%s' % (par, value) |
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555 blocks.append(par) |
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556 return ' '.join(blocks) |
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557 |
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558 def _getcorechunk(self): |
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559 """yield chunk for the core part of the bundle |
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560 |
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561 (all but headers and parameters)""" |
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562 outdebug(self.ui, 'start of parts') |
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563 for part in self._parts: |
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564 outdebug(self.ui, 'bundle part: "%s"' % part.type) |
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565 for chunk in part.getchunks(ui=self.ui): |
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566 yield chunk |
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567 outdebug(self.ui, 'end of bundle') |
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568 yield _pack(_fpartheadersize, 0) |
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569 |
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570 |
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571 def salvageoutput(self): |
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572 """return a list with a copy of all output parts in the bundle |
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573 |
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574 This is meant to be used during error handling to make sure we preserve |
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575 server output""" |
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576 salvaged = [] |
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577 for part in self._parts: |
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578 if part.type.startswith('output'): |
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579 salvaged.append(part.copy()) |
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580 return salvaged |
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581 |
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582 |
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583 class unpackermixin(object): |
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584 """A mixin to extract bytes and struct data from a stream""" |
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585 |
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586 def __init__(self, fp): |
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587 self._fp = fp |
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588 self._seekable = (util.safehasattr(fp, 'seek') and |
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589 util.safehasattr(fp, 'tell')) |
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590 |
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591 def _unpack(self, format): |
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592 """unpack this struct format from the stream""" |
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593 data = self._readexact(struct.calcsize(format)) |
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594 return _unpack(format, data) |
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595 |
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596 def _readexact(self, size): |
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597 """read exactly <size> bytes from the stream""" |
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598 return changegroup.readexactly(self._fp, size) |
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599 |
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600 def seek(self, offset, whence=0): |
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601 """move the underlying file pointer""" |
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602 if self._seekable: |
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603 return self._fp.seek(offset, whence) |
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604 else: |
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605 raise NotImplementedError(_('File pointer is not seekable')) |
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606 |
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607 def tell(self): |
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608 """return the file offset, or None if file is not seekable""" |
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609 if self._seekable: |
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610 try: |
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611 return self._fp.tell() |
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612 except IOError as e: |
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613 if e.errno == errno.ESPIPE: |
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614 self._seekable = False |
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615 else: |
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616 raise |
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617 return None |
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618 |
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619 def close(self): |
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620 """close underlying file""" |
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621 if util.safehasattr(self._fp, 'close'): |
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622 return self._fp.close() |
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623 |
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624 def getunbundler(ui, fp, magicstring=None): |
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625 """return a valid unbundler object for a given magicstring""" |
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626 if magicstring is None: |
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627 magicstring = changegroup.readexactly(fp, 4) |
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628 magic, version = magicstring[0:2], magicstring[2:4] |
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629 if magic != 'HG': |
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630 raise util.Abort(_('not a Mercurial bundle')) |
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631 unbundlerclass = formatmap.get(version) |
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632 if unbundlerclass is None: |
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633 raise util.Abort(_('unknown bundle version %s') % version) |
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634 unbundler = unbundlerclass(ui, fp) |
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635 indebug(ui, 'start processing of %s stream' % magicstring) |
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636 return unbundler |
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637 |
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638 class unbundle20(unpackermixin): |
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639 """interpret a bundle2 stream |
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640 |
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641 This class is fed with a binary stream and yields parts through its |
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642 `iterparts` methods.""" |
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643 |
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644 def __init__(self, ui, fp): |
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645 """If header is specified, we do not read it out of the stream.""" |
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646 self.ui = ui |
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647 self._decompressor = util.decompressors[None] |
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648 super(unbundle20, self).__init__(fp) |
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649 |
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650 @util.propertycache |
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651 def params(self): |
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652 """dictionary of stream level parameters""" |
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653 indebug(self.ui, 'reading bundle2 stream parameters') |
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654 params = {} |
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655 paramssize = self._unpack(_fstreamparamsize)[0] |
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656 if paramssize < 0: |
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657 raise error.BundleValueError('negative bundle param size: %i' |
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658 % paramssize) |
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659 if paramssize: |
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660 for p in self._readexact(paramssize).split(' '): |
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661 p = p.split('=', 1) |
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662 p = [urllib.unquote(i) for i in p] |
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663 if len(p) < 2: |
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664 p.append(None) |
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665 self._processparam(*p) |
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666 params[p[0]] = p[1] |
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667 return params |
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668 |
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669 def _processparam(self, name, value): |
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670 """process a parameter, applying its effect if needed |
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671 |
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672 Parameter starting with a lower case letter are advisory and will be |
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673 ignored when unknown. Those starting with an upper case letter are |
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674 mandatory and will this function will raise a KeyError when unknown. |
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675 |
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676 Note: no option are currently supported. Any input will be either |
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677 ignored or failing. |
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678 """ |
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679 if not name: |
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680 raise ValueError('empty parameter name') |
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681 if name[0] not in string.letters: |
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682 raise ValueError('non letter first character: %r' % name) |
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683 try: |
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684 handler = b2streamparamsmap[name.lower()] |
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685 except KeyError: |
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686 if name[0].islower(): |
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687 indebug(self.ui, "ignoring unknown parameter %r" % name) |
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688 else: |
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689 raise error.BundleUnknownFeatureError(params=(name,)) |
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690 else: |
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691 handler(self, name, value) |
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692 |
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693 def iterparts(self): |
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694 """yield all parts contained in the stream""" |
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695 # make sure param have been loaded |
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696 self.params |
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697 # From there, payload need to be decompressed |
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698 self._fp = self._decompressor(self._fp) |
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699 indebug(self.ui, 'start extraction of bundle2 parts') |
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700 headerblock = self._readpartheader() |
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701 while headerblock is not None: |
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702 part = unbundlepart(self.ui, headerblock, self._fp) |
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703 yield part |
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704 part.seek(0, 2) |
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705 headerblock = self._readpartheader() |
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706 indebug(self.ui, 'end of bundle2 stream') |
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707 |
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708 def _readpartheader(self): |
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709 """reads a part header size and return the bytes blob |
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710 |
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711 returns None if empty""" |
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712 headersize = self._unpack(_fpartheadersize)[0] |
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713 if headersize < 0: |
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714 raise error.BundleValueError('negative part header size: %i' |
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715 % headersize) |
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716 indebug(self.ui, 'part header size: %i' % headersize) |
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717 if headersize: |
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718 return self._readexact(headersize) |
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719 return None |
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720 |
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721 def compressed(self): |
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722 return False |
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723 |
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724 formatmap = {'20': unbundle20} |
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|
725 |
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726 b2streamparamsmap = {} |
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727 |
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728 def b2streamparamhandler(name): |
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729 """register a handler for a stream level parameter""" |
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|
730 def decorator(func): |
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731 assert name not in formatmap |
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732 b2streamparamsmap[name] = func |
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733 return func |
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734 return decorator |
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735 |
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736 @b2streamparamhandler('compression') |
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737 def processcompression(unbundler, param, value): |
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738 """read compression parameter and install payload decompression""" |
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739 if value not in util.decompressors: |
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740 raise error.BundleUnknownFeatureError(params=(param,), |
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741 values=(value,)) |
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742 unbundler._decompressor = util.decompressors[value] |
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|
743 |
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|
744 class bundlepart(object): |
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745 """A bundle2 part contains application level payload |
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746 |
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747 The part `type` is used to route the part to the application level |
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|
748 handler. |
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749 |
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750 The part payload is contained in ``part.data``. It could be raw bytes or a |
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751 generator of byte chunks. |
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752 |
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753 You can add parameters to the part using the ``addparam`` method. |
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754 Parameters can be either mandatory (default) or advisory. Remote side |
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755 should be able to safely ignore the advisory ones. |
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756 |
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757 Both data and parameters cannot be modified after the generation has begun. |
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758 """ |
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759 |
20877
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|
760 def __init__(self, parttype, mandatoryparams=(), advisoryparams=(), |
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|
761 data='', mandatory=True): |
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|
762 validateparttype(parttype) |
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|
763 self.id = None |
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764 self.type = parttype |
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765 self._data = data |
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766 self._mandatoryparams = list(mandatoryparams) |
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767 self._advisoryparams = list(advisoryparams) |
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768 # checking for duplicated entries |
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769 self._seenparams = set() |
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770 for pname, __ in self._mandatoryparams + self._advisoryparams: |
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771 if pname in self._seenparams: |
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772 raise RuntimeError('duplicated params: %s' % pname) |
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773 self._seenparams.add(pname) |
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774 # status of the part's generation: |
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775 # - None: not started, |
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776 # - False: currently generated, |
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777 # - True: generation done. |
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778 self._generated = None |
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779 self.mandatory = mandatory |
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780 |
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781 def copy(self): |
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782 """return a copy of the part |
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783 |
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784 The new part have the very same content but no partid assigned yet. |
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785 Parts with generated data cannot be copied.""" |
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786 assert not util.safehasattr(self.data, 'next') |
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787 return self.__class__(self.type, self._mandatoryparams, |
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788 self._advisoryparams, self._data, self.mandatory) |
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789 |
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790 # methods used to defines the part content |
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791 def __setdata(self, data): |
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792 if self._generated is not None: |
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793 raise error.ReadOnlyPartError('part is being generated') |
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794 self._data = data |
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795 def __getdata(self): |
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796 return self._data |
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797 data = property(__getdata, __setdata) |
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798 |
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799 @property |
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800 def mandatoryparams(self): |
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801 # make it an immutable tuple to force people through ``addparam`` |
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802 return tuple(self._mandatoryparams) |
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803 |
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804 @property |
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805 def advisoryparams(self): |
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806 # make it an immutable tuple to force people through ``addparam`` |
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807 return tuple(self._advisoryparams) |
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808 |
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809 def addparam(self, name, value='', mandatory=True): |
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810 if self._generated is not None: |
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811 raise error.ReadOnlyPartError('part is being generated') |
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812 if name in self._seenparams: |
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813 raise ValueError('duplicated params: %s' % name) |
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814 self._seenparams.add(name) |
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815 params = self._advisoryparams |
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816 if mandatory: |
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817 params = self._mandatoryparams |
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818 params.append((name, value)) |
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819 |
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820 # methods used to generates the bundle2 stream |
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821 def getchunks(self, ui): |
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822 if self._generated is not None: |
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823 raise RuntimeError('part can only be consumed once') |
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824 self._generated = False |
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825 |
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826 if ui.debugflag: |
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827 msg = ['bundle2-output-part: "%s"' % self.type] |
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828 if not self.mandatory: |
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829 msg.append(' (advisory)') |
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830 nbmp = len(self.mandatoryparams) |
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831 nbap = len(self.advisoryparams) |
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832 if nbmp or nbap: |
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833 msg.append(' (params:') |
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834 if nbmp: |
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835 msg.append(' %i mandatory' % nbmp) |
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836 if nbap: |
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837 msg.append(' %i advisory' % nbmp) |
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838 msg.append(')') |
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839 if not self.data: |
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840 msg.append(' empty payload') |
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841 elif util.safehasattr(self.data, 'next'): |
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842 msg.append(' streamed payload') |
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843 else: |
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844 msg.append(' %i bytes payload' % len(self.data)) |
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845 msg.append('\n') |
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846 ui.debug(''.join(msg)) |
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847 |
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848 #### header |
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849 if self.mandatory: |
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850 parttype = self.type.upper() |
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851 else: |
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852 parttype = self.type.lower() |
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853 outdebug(ui, 'part %s: "%s"' % (self.id, parttype)) |
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854 ## parttype |
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855 header = [_pack(_fparttypesize, len(parttype)), |
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856 parttype, _pack(_fpartid, self.id), |
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857 ] |
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858 ## parameters |
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859 # count |
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860 manpar = self.mandatoryparams |
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861 advpar = self.advisoryparams |
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862 header.append(_pack(_fpartparamcount, len(manpar), len(advpar))) |
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863 # size |
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864 parsizes = [] |
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865 for key, value in manpar: |
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866 parsizes.append(len(key)) |
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867 parsizes.append(len(value)) |
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868 for key, value in advpar: |
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869 parsizes.append(len(key)) |
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870 parsizes.append(len(value)) |
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871 paramsizes = _pack(_makefpartparamsizes(len(parsizes) / 2), *parsizes) |
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872 header.append(paramsizes) |
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873 # key, value |
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Pierre-Yves David <pierre-yves.david@fb.com>
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20876
diff
changeset
|
874 for key, value in manpar: |
9e9e3a4e9261
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parents:
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diff
changeset
|
875 header.append(key) |
9e9e3a4e9261
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parents:
20876
diff
changeset
|
876 header.append(value) |
9e9e3a4e9261
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20876
diff
changeset
|
877 for key, value in advpar: |
9e9e3a4e9261
bundle2: part params
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20876
diff
changeset
|
878 header.append(key) |
9e9e3a4e9261
bundle2: part params
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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diff
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|
879 header.append(value) |
9e9e3a4e9261
bundle2: part params
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20876
diff
changeset
|
880 ## finalize header |
20856
8a6a86c9a5b5
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parents:
20844
diff
changeset
|
881 headerchunk = ''.join(header) |
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bundle2: add debug output for part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25320
diff
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|
882 outdebug(ui, 'header chunk size: %i' % len(headerchunk)) |
20856
8a6a86c9a5b5
bundle2: support bundling of empty part (with a type)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20844
diff
changeset
|
883 yield _pack(_fpartheadersize, len(headerchunk)) |
8a6a86c9a5b5
bundle2: support bundling of empty part (with a type)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20844
diff
changeset
|
884 yield headerchunk |
20877
9e9e3a4e9261
bundle2: part params
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20876
diff
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|
885 ## payload |
23067
420a051616ce
bundle2: transmit exception during part generation
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parents:
23066
diff
changeset
|
886 try: |
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23066
diff
changeset
|
887 for chunk in self._payloadchunks(): |
25321
b44ee346211f
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25320
diff
changeset
|
888 outdebug(ui, 'payload chunk size: %i' % len(chunk)) |
23067
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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diff
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|
889 yield _pack(_fpayloadsize, len(chunk)) |
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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diff
changeset
|
890 yield chunk |
26144
4bc3707f3e67
bundle2: don't try to recover from a GeneratorExit (issue4785)
Augie Fackler <augie@google.com>
parents:
25919
diff
changeset
|
891 except GeneratorExit: |
4bc3707f3e67
bundle2: don't try to recover from a GeneratorExit (issue4785)
Augie Fackler <augie@google.com>
parents:
25919
diff
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|
892 # GeneratorExit means that nobody is listening for our |
4bc3707f3e67
bundle2: don't try to recover from a GeneratorExit (issue4785)
Augie Fackler <augie@google.com>
parents:
25919
diff
changeset
|
893 # results anyway, so just bail quickly rather than trying |
4bc3707f3e67
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Augie Fackler <augie@google.com>
parents:
25919
diff
changeset
|
894 # to produce an error part. |
4bc3707f3e67
bundle2: don't try to recover from a GeneratorExit (issue4785)
Augie Fackler <augie@google.com>
parents:
25919
diff
changeset
|
895 ui.debug('bundle2-generatorexit\n') |
4bc3707f3e67
bundle2: don't try to recover from a GeneratorExit (issue4785)
Augie Fackler <augie@google.com>
parents:
25919
diff
changeset
|
896 raise |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25641
diff
changeset
|
897 except BaseException as exc: |
23067
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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diff
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|
898 # backup exception data for later |
25324
deed9c6b12d2
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25323
diff
changeset
|
899 ui.debug('bundle2-input-stream-interrupt: encoding exception %s' |
deed9c6b12d2
bundle2: add generic debug output regarding generated interruption
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25323
diff
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|
900 % exc) |
23067
420a051616ce
bundle2: transmit exception during part generation
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parents:
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diff
changeset
|
901 exc_info = sys.exc_info() |
420a051616ce
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23066
diff
changeset
|
902 msg = 'unexpected error: %s' % exc |
24686
e0e28e910fa3
bundle2: rename format, parts and config to final names
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
24648
diff
changeset
|
903 interpart = bundlepart('error:abort', [('message', msg)], |
23590
4440c7cc3728
bundle2.bundlepart: make mandatory part flag explicit in API
Eric Sumner <ericsumner@fb.com>
parents:
23586
diff
changeset
|
904 mandatory=False) |
23067
420a051616ce
bundle2: transmit exception during part generation
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parents:
23066
diff
changeset
|
905 interpart.id = 0 |
420a051616ce
bundle2: transmit exception during part generation
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parents:
23066
diff
changeset
|
906 yield _pack(_fpayloadsize, -1) |
25321
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25320
diff
changeset
|
907 for chunk in interpart.getchunks(ui=ui): |
23067
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
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diff
changeset
|
908 yield chunk |
25321
b44ee346211f
bundle2: add debug output for part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25320
diff
changeset
|
909 outdebug(ui, 'closing payload chunk') |
23067
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23066
diff
changeset
|
910 # abort current part payload |
420a051616ce
bundle2: transmit exception during part generation
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parents:
23066
diff
changeset
|
911 yield _pack(_fpayloadsize, 0) |
420a051616ce
bundle2: transmit exception during part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23066
diff
changeset
|
912 raise exc_info[0], exc_info[1], exc_info[2] |
21000
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
913 # end of payload |
25321
b44ee346211f
bundle2: add debug output for part generation
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25320
diff
changeset
|
914 outdebug(ui, 'closing payload chunk') |
21000
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
915 yield _pack(_fpayloadsize, 0) |
21601
7ff01befc7ec
bundle2: track life cycle of parts
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21600
diff
changeset
|
916 self._generated = True |
21000
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
917 |
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
918 def _payloadchunks(self): |
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
919 """yield chunks of a the part payload |
4cae06ae1562
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
920 |
4cae06ae1562
bundle2: extract a _payloadchunks method for part
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20998
diff
changeset
|
921 Exists to handle the different methods to provide data to a part.""" |
20876
ddd56f3eb786
bundle2: support for bundling and unbundling payload
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20864
diff
changeset
|
922 # we only support fixed size data now. |
ddd56f3eb786
bundle2: support for bundling and unbundling payload
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20864
diff
changeset
|
923 # This will be improved in the future. |
21001
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
924 if util.safehasattr(self.data, 'next'): |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
925 buff = util.chunkbuffer(self.data) |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
926 chunk = buff.read(preferedchunksize) |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
927 while chunk: |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
928 yield chunk |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
929 chunk = buff.read(preferedchunksize) |
c93bb6a08fa1
bundle2: support chunk iterator as part data
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
21000
diff
changeset
|
930 elif len(self.data): |
20876
ddd56f3eb786
bundle2: support for bundling and unbundling payload
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20864
diff
changeset
|
931 yield self.data |
20802
520df53ad26a
bundle2: a very first version of bundle2 unbundler
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20801
diff
changeset
|
932 |
23066
ad144882318d
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parents:
23029
diff
changeset
|
933 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
934 flaginterrupt = -1 |
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bundle2: add a interrupt mechanism
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parents:
23029
diff
changeset
|
935 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
936 class interrupthandler(unpackermixin): |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
937 """read one part and process it with restricted capability |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
938 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
939 This allows to transmit exception raised on the producer size during part |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
940 iteration while the consumer is reading a part. |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
941 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
942 Part processed in this manner only have access to a ui object,""" |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
943 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
944 def __init__(self, ui, fp): |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
945 super(interrupthandler, self).__init__(fp) |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
946 self.ui = ui |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
947 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
948 def _readpartheader(self): |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
949 """reads a part header size and return the bytes blob |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
950 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
951 returns None if empty""" |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
952 headersize = self._unpack(_fpartheadersize)[0] |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
953 if headersize < 0: |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
954 raise error.BundleValueError('negative part header size: %i' |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
955 % headersize) |
25318
64dd8f25fcf4
bundle2: introduce a specific function for debug messages while unbundling
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25317
diff
changeset
|
956 indebug(self.ui, 'part header size: %i\n' % headersize) |
23066
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
957 if headersize: |
ad144882318d
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parents:
23029
diff
changeset
|
958 return self._readexact(headersize) |
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parents:
23029
diff
changeset
|
959 return None |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
960 |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
961 def __call__(self): |
25335
8f7137a85a0e
bundle2: add generic debug output regarding processed interruption
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25334
diff
changeset
|
962 |
8f7137a85a0e
bundle2: add generic debug output regarding processed interruption
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25334
diff
changeset
|
963 self.ui.debug('bundle2-input-stream-interrupt:' |
8f7137a85a0e
bundle2: add generic debug output regarding processed interruption
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25334
diff
changeset
|
964 ' opening out of band context\n') |
25320
697d8953b04d
bundle2: handle new line in 'indebug' function
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25319
diff
changeset
|
965 indebug(self.ui, 'bundle2 stream interruption, looking for a part.') |
23066
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
966 headerblock = self._readpartheader() |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
967 if headerblock is None: |
25320
697d8953b04d
bundle2: handle new line in 'indebug' function
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25319
diff
changeset
|
968 indebug(self.ui, 'no part found during interruption.') |
23066
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
969 return |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
970 part = unbundlepart(self.ui, headerblock, self._fp) |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
971 op = interruptoperation(self.ui) |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
972 _processpart(op, part) |
25335
8f7137a85a0e
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25334
diff
changeset
|
973 self.ui.debug('bundle2-input-stream-interrupt:' |
8f7137a85a0e
bundle2: add generic debug output regarding processed interruption
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25334
diff
changeset
|
974 ' closing out of band context\n') |
23066
ad144882318d
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parents:
23029
diff
changeset
|
975 |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
976 class interruptoperation(object): |
ad144882318d
bundle2: add a interrupt mechanism
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
977 """A limited operation to be use by part handler during interruption |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
978 |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
979 It only have access to an ui object. |
ad144882318d
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
980 """ |
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parents:
23029
diff
changeset
|
981 |
ad144882318d
bundle2: add a interrupt mechanism
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parents:
23029
diff
changeset
|
982 def __init__(self, ui): |
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parents:
23029
diff
changeset
|
983 self.ui = ui |
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Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23029
diff
changeset
|
984 self.reply = None |
24878
e530cde6d115
bundle2: disable ouput capture unless we use http (issue4613 issue4615)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
24851
diff
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985 self.captureoutput = False |
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986 |
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987 @property |
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988 def repo(self): |
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989 raise RuntimeError('no repo access from stream interruption') |
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990 |
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991 def gettransaction(self): |
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992 raise TransactionUnavailable('no repo access from stream interruption') |
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993 |
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994 class unbundlepart(unpackermixin): |
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995 """a bundle part read from a bundle""" |
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996 |
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997 def __init__(self, ui, header, fp): |
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998 super(unbundlepart, self).__init__(fp) |
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999 self.ui = ui |
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1000 # unbundle state attr |
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1001 self._headerdata = header |
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1002 self._headeroffset = 0 |
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1003 self._initialized = False |
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1004 self.consumed = False |
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1005 # part data |
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1006 self.id = None |
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1007 self.type = None |
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1008 self.mandatoryparams = None |
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1009 self.advisoryparams = None |
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1010 self.params = None |
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1011 self.mandatorykeys = () |
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1012 self._payloadstream = None |
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1013 self._readheader() |
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1014 self._mandatory = None |
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1015 self._chunkindex = [] #(payload, file) position tuples for chunk starts |
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1016 self._pos = 0 |
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1017 |
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1018 def _fromheader(self, size): |
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1019 """return the next <size> byte from the header""" |
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1020 offset = self._headeroffset |
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1021 data = self._headerdata[offset:(offset + size)] |
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1022 self._headeroffset = offset + size |
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1023 return data |
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1024 |
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1025 def _unpackheader(self, format): |
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1026 """read given format from header |
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1027 |
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1028 This automatically compute the size of the format to read.""" |
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1029 data = self._fromheader(struct.calcsize(format)) |
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1030 return _unpack(format, data) |
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1031 |
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1032 def _initparams(self, mandatoryparams, advisoryparams): |
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1033 """internal function to setup all logic related parameters""" |
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1034 # make it read only to prevent people touching it by mistake. |
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1035 self.mandatoryparams = tuple(mandatoryparams) |
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1036 self.advisoryparams = tuple(advisoryparams) |
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1037 # user friendly UI |
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1038 self.params = dict(self.mandatoryparams) |
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1039 self.params.update(dict(self.advisoryparams)) |
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1040 self.mandatorykeys = frozenset(p[0] for p in mandatoryparams) |
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1041 |
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1042 def _payloadchunks(self, chunknum=0): |
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1043 '''seek to specified chunk and start yielding data''' |
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1044 if len(self._chunkindex) == 0: |
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1045 assert chunknum == 0, 'Must start with chunk 0' |
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1046 self._chunkindex.append((0, super(unbundlepart, self).tell())) |
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1047 else: |
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1048 assert chunknum < len(self._chunkindex), \ |
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1049 'Unknown chunk %d' % chunknum |
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1050 super(unbundlepart, self).seek(self._chunkindex[chunknum][1]) |
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1051 |
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1052 pos = self._chunkindex[chunknum][0] |
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1053 payloadsize = self._unpack(_fpayloadsize)[0] |
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1054 indebug(self.ui, 'payload chunk size: %i' % payloadsize) |
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1055 while payloadsize: |
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1056 if payloadsize == flaginterrupt: |
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1057 # interruption detection, the handler will now read a |
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1058 # single part and process it. |
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1059 interrupthandler(self.ui, self._fp)() |
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1060 elif payloadsize < 0: |
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1061 msg = 'negative payload chunk size: %i' % payloadsize |
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1062 raise error.BundleValueError(msg) |
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1063 else: |
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1064 result = self._readexact(payloadsize) |
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1065 chunknum += 1 |
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1066 pos += payloadsize |
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1067 if chunknum == len(self._chunkindex): |
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1068 self._chunkindex.append((pos, |
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1069 super(unbundlepart, self).tell())) |
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1070 yield result |
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1071 payloadsize = self._unpack(_fpayloadsize)[0] |
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1072 indebug(self.ui, 'payload chunk size: %i' % payloadsize) |
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1073 |
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1074 def _findchunk(self, pos): |
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1075 '''for a given payload position, return a chunk number and offset''' |
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1076 for chunk, (ppos, fpos) in enumerate(self._chunkindex): |
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1077 if ppos == pos: |
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1078 return chunk, 0 |
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1079 elif ppos > pos: |
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1080 return chunk - 1, pos - self._chunkindex[chunk - 1][0] |
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1081 raise ValueError('Unknown chunk') |
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1082 |
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1083 def _readheader(self): |
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1084 """read the header and setup the object""" |
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1085 typesize = self._unpackheader(_fparttypesize)[0] |
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1086 self.type = self._fromheader(typesize) |
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1087 indebug(self.ui, 'part type: "%s"' % self.type) |
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1088 self.id = self._unpackheader(_fpartid)[0] |
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1089 indebug(self.ui, 'part id: "%s"' % self.id) |
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1090 # extract mandatory bit from type |
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1091 self.mandatory = (self.type != self.type.lower()) |
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1092 self.type = self.type.lower() |
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1093 ## reading parameters |
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1094 # param count |
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1095 mancount, advcount = self._unpackheader(_fpartparamcount) |
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1096 indebug(self.ui, 'part parameters: %i' % (mancount + advcount)) |
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1097 # param size |
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1098 fparamsizes = _makefpartparamsizes(mancount + advcount) |
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1099 paramsizes = self._unpackheader(fparamsizes) |
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1100 # make it a list of couple again |
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1101 paramsizes = zip(paramsizes[::2], paramsizes[1::2]) |
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1102 # split mandatory from advisory |
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1103 mansizes = paramsizes[:mancount] |
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1104 advsizes = paramsizes[mancount:] |
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1105 # retrieve param value |
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1106 manparams = [] |
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1107 for key, value in mansizes: |
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1108 manparams.append((self._fromheader(key), self._fromheader(value))) |
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1109 advparams = [] |
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1110 for key, value in advsizes: |
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1111 advparams.append((self._fromheader(key), self._fromheader(value))) |
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1112 self._initparams(manparams, advparams) |
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1113 ## part payload |
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1114 self._payloadstream = util.chunkbuffer(self._payloadchunks()) |
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1115 # we read the data, tell it |
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1116 self._initialized = True |
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1117 |
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1118 def read(self, size=None): |
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1119 """read payload data""" |
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1120 if not self._initialized: |
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1121 self._readheader() |
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1122 if size is None: |
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1123 data = self._payloadstream.read() |
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1124 else: |
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1125 data = self._payloadstream.read(size) |
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1126 self._pos += len(data) |
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1127 if size is None or len(data) < size: |
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1128 if not self.consumed and self._pos: |
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1129 self.ui.debug('bundle2-input-part: total payload size %i\n' |
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1130 % self._pos) |
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1131 self.consumed = True |
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1132 return data |
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1133 |
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1134 def tell(self): |
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1135 return self._pos |
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1136 |
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1137 def seek(self, offset, whence=0): |
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1138 if whence == 0: |
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1139 newpos = offset |
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1140 elif whence == 1: |
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1141 newpos = self._pos + offset |
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1142 elif whence == 2: |
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1143 if not self.consumed: |
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1144 self.read() |
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1145 newpos = self._chunkindex[-1][0] - offset |
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1146 else: |
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1147 raise ValueError('Unknown whence value: %r' % (whence,)) |
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1148 |
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1149 if newpos > self._chunkindex[-1][0] and not self.consumed: |
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1150 self.read() |
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1151 if not 0 <= newpos <= self._chunkindex[-1][0]: |
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1152 raise ValueError('Offset out of range') |
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1153 |
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1154 if self._pos != newpos: |
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1155 chunk, internaloffset = self._findchunk(newpos) |
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1156 self._payloadstream = util.chunkbuffer(self._payloadchunks(chunk)) |
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1157 adjust = self.read(internaloffset) |
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1158 if len(adjust) != internaloffset: |
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1159 raise util.Abort(_('Seek failed\n')) |
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1160 self._pos = newpos |
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1161 |
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1162 # These are only the static capabilities. |
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1163 # Check the 'getrepocaps' function for the rest. |
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1164 capabilities = {'HG20': (), |
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1165 'error': ('abort', 'unsupportedcontent', 'pushraced', |
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1166 'pushkey'), |
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1167 'listkeys': (), |
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1168 'pushkey': (), |
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1169 'digests': tuple(sorted(util.DIGESTS.keys())), |
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1170 'remote-changegroup': ('http', 'https'), |
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1171 'hgtagsfnodes': (), |
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1172 } |
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1173 |
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1174 def getrepocaps(repo, allowpushback=False): |
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1175 """return the bundle2 capabilities for a given repo |
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1176 |
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1177 Exists to allow extensions (like evolution) to mutate the capabilities. |
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1178 """ |
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1179 caps = capabilities.copy() |
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1180 caps['changegroup'] = tuple(sorted(changegroup.packermap.keys())) |
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1181 if obsolete.isenabled(repo, obsolete.exchangeopt): |
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1182 supportedformat = tuple('V%i' % v for v in obsolete.formats) |
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1183 caps['obsmarkers'] = supportedformat |
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1184 if allowpushback: |
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1185 caps['pushback'] = () |
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1186 return caps |
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1187 |
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|
1188 def bundle2caps(remote): |
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1189 """return the bundle capabilities of a peer as dict""" |
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1190 raw = remote.capable('bundle2') |
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1191 if not raw and raw != '': |
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1192 return {} |
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1193 capsblob = urllib.unquote(remote.capable('bundle2')) |
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1194 return decodecaps(capsblob) |
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1195 |
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|
1196 def obsmarkersversion(caps): |
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1197 """extract the list of supported obsmarkers versions from a bundle2caps dict |
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1198 """ |
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1199 obscaps = caps.get('obsmarkers', ()) |
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1200 return [int(c[1:]) for c in obscaps if c.startswith('V')] |
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1201 |
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1202 @parthandler('changegroup', ('version', 'nbchanges')) |
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1203 def handlechangegroup(op, inpart): |
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1204 """apply a changegroup part on the repo |
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1205 |
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1206 This is a very early implementation that will massive rework before being |
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1207 inflicted to any end-user. |
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1208 """ |
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1209 # Make sure we trigger a transaction creation |
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1210 # |
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1211 # The addchangegroup function will get a transaction object by itself, but |
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1212 # we need to make sure we trigger the creation of a transaction object used |
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1213 # for the whole processing scope. |
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1214 op.gettransaction() |
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1215 unpackerversion = inpart.params.get('version', '01') |
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1216 # We should raise an appropriate exception here |
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1217 unpacker = changegroup.packermap[unpackerversion][1] |
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1218 cg = unpacker(inpart, None) |
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1219 # the source and url passed here are overwritten by the one contained in |
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1220 # the transaction.hookargs argument. So 'bundle2' is a placeholder |
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1221 nbchangesets = None |
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1222 if 'nbchanges' in inpart.params: |
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1223 nbchangesets = int(inpart.params.get('nbchanges')) |
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1224 ret = changegroup.addchangegroup(op.repo, cg, 'bundle2', 'bundle2', |
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1225 expectedtotal=nbchangesets) |
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1226 op.records.add('changegroup', {'return': ret}) |
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1227 if op.reply is not None: |
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1228 # This is definitely not the final form of this |
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1229 # return. But one need to start somewhere. |
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1230 part = op.reply.newpart('reply:changegroup', mandatory=False) |
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1231 part.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1232 part.addparam('return', '%i' % ret, mandatory=False) |
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1233 assert not inpart.read() |
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1234 |
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1235 _remotechangegroupparams = tuple(['url', 'size', 'digests'] + |
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1236 ['digest:%s' % k for k in util.DIGESTS.keys()]) |
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1237 @parthandler('remote-changegroup', _remotechangegroupparams) |
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1238 def handleremotechangegroup(op, inpart): |
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1239 """apply a bundle10 on the repo, given an url and validation information |
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1240 |
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1241 All the information about the remote bundle to import are given as |
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1242 parameters. The parameters include: |
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1243 - url: the url to the bundle10. |
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1244 - size: the bundle10 file size. It is used to validate what was |
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1245 retrieved by the client matches the server knowledge about the bundle. |
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1246 - digests: a space separated list of the digest types provided as |
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1247 parameters. |
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1248 - digest:<digest-type>: the hexadecimal representation of the digest with |
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1249 that name. Like the size, it is used to validate what was retrieved by |
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1250 the client matches what the server knows about the bundle. |
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1251 |
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1252 When multiple digest types are given, all of them are checked. |
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1253 """ |
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1254 try: |
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1255 raw_url = inpart.params['url'] |
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1256 except KeyError: |
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1257 raise util.Abort(_('remote-changegroup: missing "%s" param') % 'url') |
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1258 parsed_url = util.url(raw_url) |
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1259 if parsed_url.scheme not in capabilities['remote-changegroup']: |
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1260 raise util.Abort(_('remote-changegroup does not support %s urls') % |
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1261 parsed_url.scheme) |
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1262 |
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1263 try: |
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1264 size = int(inpart.params['size']) |
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1265 except ValueError: |
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1266 raise util.Abort(_('remote-changegroup: invalid value for param "%s"') |
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1267 % 'size') |
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1268 except KeyError: |
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1269 raise util.Abort(_('remote-changegroup: missing "%s" param') % 'size') |
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1270 |
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1271 digests = {} |
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1272 for typ in inpart.params.get('digests', '').split(): |
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1273 param = 'digest:%s' % typ |
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1274 try: |
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1275 value = inpart.params[param] |
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1276 except KeyError: |
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1277 raise util.Abort(_('remote-changegroup: missing "%s" param') % |
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1278 param) |
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1279 digests[typ] = value |
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1280 |
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1281 real_part = util.digestchecker(url.open(op.ui, raw_url), size, digests) |
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1282 |
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1283 # Make sure we trigger a transaction creation |
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1284 # |
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1285 # The addchangegroup function will get a transaction object by itself, but |
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1286 # we need to make sure we trigger the creation of a transaction object used |
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1287 # for the whole processing scope. |
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1288 op.gettransaction() |
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1289 from . import exchange |
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1290 cg = exchange.readbundle(op.repo.ui, real_part, raw_url) |
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1291 if not isinstance(cg, changegroup.cg1unpacker): |
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1292 raise util.Abort(_('%s: not a bundle version 1.0') % |
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1293 util.hidepassword(raw_url)) |
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1294 ret = changegroup.addchangegroup(op.repo, cg, 'bundle2', 'bundle2') |
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1295 op.records.add('changegroup', {'return': ret}) |
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1296 if op.reply is not None: |
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1297 # This is definitely not the final form of this |
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1298 # return. But one need to start somewhere. |
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1299 part = op.reply.newpart('reply:changegroup') |
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1300 part.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1301 part.addparam('return', '%i' % ret, mandatory=False) |
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|
1302 try: |
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|
1303 real_part.validate() |
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1304 except util.Abort as e: |
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1305 raise util.Abort(_('bundle at %s is corrupted:\n%s') % |
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|
1306 (util.hidepassword(raw_url), str(e))) |
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bundle2: client side support for a part to import external bundles
Mike Hommey <mh@glandium.org>
parents:
23011
diff
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|
1307 assert not inpart.read() |
149fc8a44184
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Mike Hommey <mh@glandium.org>
parents:
23011
diff
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|
1308 |
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diff
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|
1309 @parthandler('reply:changegroup', ('return', 'in-reply-to')) |
22548
8a1ae133770a
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Mike Hommey <mh@glandium.org>
parents:
22390
diff
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|
1310 def handlereplychangegroup(op, inpart): |
21611
71b7b3f79a3c
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diff
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|
1311 ret = int(inpart.params['return']) |
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|
1312 replyto = int(inpart.params['in-reply-to']) |
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diff
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|
1313 op.records.add('changegroup', {'return': ret}, replyto) |
20950
c7ceae0faf69
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parents:
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diff
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|
1314 |
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|
1315 @parthandler('check:heads') |
22548
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diff
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|
1316 def handlecheckheads(op, inpart): |
21060
0bea9db7543b
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diff
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|
1317 """check that head of the repo did not change |
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|
1318 |
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diff
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|
1319 This is used to detect a push race when using unbundle. |
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diff
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|
1320 This replaces the "heads" argument of unbundle.""" |
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diff
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|
1321 h = inpart.read(20) |
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diff
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|
1322 heads = [] |
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diff
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|
1323 while len(h) == 20: |
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|
1324 heads.append(h) |
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diff
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|
1325 h = inpart.read(20) |
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diff
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|
1326 assert not h |
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diff
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|
1327 if heads != op.repo.heads(): |
21185
5b3717e1a3ea
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parents:
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diff
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|
1328 raise error.PushRaced('repository changed while pushing - ' |
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diff
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|
1329 'please try again') |
21130
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|
1330 |
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|
1331 @parthandler('output') |
21131
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|
1332 def handleoutput(op, inpart): |
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1333 """forward output captured on the server to the client""" |
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|
1334 for line in inpart.read().splitlines(): |
24846
e79dd1c9753e
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parents:
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diff
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|
1335 op.ui.status(('remote: %s\n' % line)) |
21131
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|
1336 |
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|
1337 @parthandler('replycaps') |
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1338 def handlereplycaps(op, inpart): |
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|
1339 """Notify that a reply bundle should be created |
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|
1340 |
21138
f469879d27ec
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|
1341 The payload contains the capabilities information for the reply""" |
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parents:
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diff
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|
1342 caps = decodecaps(inpart.read()) |
21130
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diff
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|
1343 if op.reply is None: |
21135
98fbf3adfd83
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diff
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|
1344 op.reply = bundle20(op.ui, caps) |
21131
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1345 |
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|
1346 @parthandler('error:abort', ('message', 'hint')) |
24741
bb67e52362d6
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diff
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|
1347 def handleerrorabort(op, inpart): |
21177
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parents:
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|
1348 """Used to transmit abort error over the wire""" |
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diff
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|
1349 raise util.Abort(inpart.params['message'], hint=inpart.params.get('hint')) |
21183
4345274adc4b
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diff
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|
1350 |
25493
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|
1351 @parthandler('error:pushkey', ('namespace', 'key', 'new', 'old', 'ret', |
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|
1352 'in-reply-to')) |
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1353 def handleerrorpushkey(op, inpart): |
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|
1354 """Used to transmit failure of a mandatory pushkey over the wire""" |
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1355 kwargs = {} |
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|
1356 for name in ('namespace', 'key', 'new', 'old', 'ret'): |
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1357 value = inpart.params.get(name) |
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1358 if value is not None: |
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|
1359 kwargs[name] = value |
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diff
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|
1360 raise error.PushkeyFailed(inpart.params['in-reply-to'], **kwargs) |
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|
1361 |
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|
1362 @parthandler('error:unsupportedcontent', ('parttype', 'params')) |
24741
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|
1363 def handleerrorunsupportedcontent(op, inpart): |
21619
292331e906d7
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diff
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|
1364 """Used to transmit unknown content error over the wire""" |
21622
457492741007
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|
1365 kwargs = {} |
21627
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21626
diff
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|
1366 parttype = inpart.params.get('parttype') |
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|
1367 if parttype is not None: |
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diff
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|
1368 kwargs['parttype'] = parttype |
21622
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|
1369 params = inpart.params.get('params') |
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|
1370 if params is not None: |
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|
1371 kwargs['params'] = params.split('\0') |
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|
1372 |
26393
cff70549a959
bundle2: rename error exception class for unsupported feature
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diff
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|
1373 raise error.BundleUnknownFeatureError(**kwargs) |
21186
9f3652e851f8
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|
1374 |
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|
1375 @parthandler('error:pushraced', ('message',)) |
24741
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|
1376 def handleerrorpushraced(op, inpart): |
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|
1377 """Used to transmit push race error over the wire""" |
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|
1378 raise error.ResponseError(_('push failed:'), inpart.params['message']) |
21655
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|
1379 |
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|
1380 @parthandler('listkeys', ('namespace',)) |
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|
1381 def handlelistkeys(op, inpart): |
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|
1382 """retrieve pushkey namespace content stored in a bundle2""" |
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|
1383 namespace = inpart.params['namespace'] |
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|
1384 r = pushkey.decodekeys(inpart.read()) |
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|
1385 op.records.add('listkeys', (namespace, r)) |
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|
1386 |
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|
1387 @parthandler('pushkey', ('namespace', 'key', 'old', 'new')) |
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|
1388 def handlepushkey(op, inpart): |
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|
1389 """process a pushkey request""" |
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|
1390 dec = pushkey.decode |
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|
1391 namespace = dec(inpart.params['namespace']) |
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1392 key = dec(inpart.params['key']) |
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|
1393 old = dec(inpart.params['old']) |
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1394 new = dec(inpart.params['new']) |
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1395 ret = op.repo.pushkey(namespace, key, old, new) |
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1396 record = {'namespace': namespace, |
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1397 'key': key, |
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1398 'old': old, |
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|
1399 'new': new} |
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1400 op.records.add('pushkey', record) |
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1401 if op.reply is not None: |
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1402 rpart = op.reply.newpart('reply:pushkey') |
21660
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|
1403 rpart.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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|
1404 rpart.addparam('return', '%i' % ret, mandatory=False) |
25481
6de96cb31176
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diff
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|
1405 if inpart.mandatory and not ret: |
25484
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|
1406 kwargs = {} |
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|
1407 for key in ('namespace', 'key', 'new', 'old', 'ret'): |
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|
1408 if key in inpart.params: |
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|
1409 kwargs[key] = inpart.params[key] |
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1410 raise error.PushkeyFailed(partid=str(inpart.id), **kwargs) |
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1411 |
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1412 @parthandler('reply:pushkey', ('return', 'in-reply-to')) |
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1413 def handlepushkeyreply(op, inpart): |
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1414 """retrieve the result of a pushkey request""" |
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1415 ret = int(inpart.params['return']) |
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1416 partid = int(inpart.params['in-reply-to']) |
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1417 op.records.add('pushkey', {'return': ret}, partid) |
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1418 |
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1419 @parthandler('obsmarkers') |
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1420 def handleobsmarker(op, inpart): |
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1421 """add a stream of obsmarkers to the repo""" |
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1422 tr = op.gettransaction() |
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1423 markerdata = inpart.read() |
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1424 if op.ui.config('experimental', 'obsmarkers-exchange-debug', False): |
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1425 op.ui.write(('obsmarker-exchange: %i bytes received\n') |
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1426 % len(markerdata)) |
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1427 new = op.repo.obsstore.mergemarkers(tr, markerdata) |
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1428 if new: |
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1429 op.repo.ui.status(_('%i new obsolescence markers\n') % new) |
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1430 op.records.add('obsmarkers', {'new': new}) |
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1431 if op.reply is not None: |
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1432 rpart = op.reply.newpart('reply:obsmarkers') |
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1433 rpart.addparam('in-reply-to', str(inpart.id), mandatory=False) |
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1434 rpart.addparam('new', '%i' % new, mandatory=False) |
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1435 |
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1436 |
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1437 @parthandler('reply:obsmarkers', ('new', 'in-reply-to')) |
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1438 def handleobsmarkerreply(op, inpart): |
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1439 """retrieve the result of a pushkey request""" |
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1440 ret = int(inpart.params['new']) |
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1441 partid = int(inpart.params['in-reply-to']) |
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1442 op.records.add('obsmarkers', {'new': ret}, partid) |
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1443 |
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1444 @parthandler('hgtagsfnodes') |
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1445 def handlehgtagsfnodes(op, inpart): |
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1446 """Applies .hgtags fnodes cache entries to the local repo. |
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1447 |
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1448 Payload is pairs of 20 byte changeset nodes and filenodes. |
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1449 """ |
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1450 cache = tags.hgtagsfnodescache(op.repo.unfiltered()) |
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1451 |
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1452 count = 0 |
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1453 while True: |
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1454 node = inpart.read(20) |
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1455 fnode = inpart.read(20) |
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1456 if len(node) < 20 or len(fnode) < 20: |
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1457 op.ui.debug('ignoring incomplete received .hgtags fnodes data\n') |
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1458 break |
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1459 cache.setfnode(node, fnode) |
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1460 count += 1 |
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1461 |
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1462 cache.write() |
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1463 op.ui.debug('applied %i hgtags fnodes cache entries\n' % count) |