Mercurial > hg
annotate hgext/fastannotate/protocol.py @ 47589:f5c24c124e07
dirstate: introduce an internal `_add` method
We want to split current user of `dirstate.add` between `hg add`-like cases and
update of the dirstate coming from update/merge.
To do this we will introduce new API. The first step is to introduces an
internal function that these new API migh use (or not use) to distinct between
the migrated users and the others.
Differential Revision: https://phab.mercurial-scm.org/D11010
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 07 Jul 2021 19:31:52 +0200 |
parents | b6b696442a4d |
children | c424ff4807e6 |
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1 # Copyright 2016-present Facebook. All Rights Reserved. |
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2 # |
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3 # protocol: logic for a server providing fastannotate support |
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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 from __future__ import absolute_import |
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8 |
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9 import contextlib |
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10 import os |
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11 |
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12 from mercurial.i18n import _ |
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13 from mercurial.pycompat import open |
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14 from mercurial import ( |
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15 error, |
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16 extensions, |
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17 hg, |
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18 pycompat, |
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19 util, |
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20 wireprotov1peer, |
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21 wireprotov1server, |
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22 ) |
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23 from mercurial.utils import ( |
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24 urlutil, |
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25 ) |
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26 from . import context |
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27 |
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28 # common |
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29 |
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30 |
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31 def _getmaster(ui): |
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32 """get the mainbranch, and enforce it is set""" |
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33 master = ui.config(b'fastannotate', b'mainbranch') |
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34 if not master: |
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35 raise error.Abort( |
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36 _( |
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37 b'fastannotate.mainbranch is required ' |
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38 b'for both the client and the server' |
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39 ) |
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40 ) |
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41 return master |
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42 |
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43 |
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44 # server-side |
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45 |
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46 |
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47 def _capabilities(orig, repo, proto): |
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48 result = orig(repo, proto) |
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49 result.append(b'getannotate') |
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50 return result |
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51 |
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52 |
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53 def _getannotate(repo, proto, path, lastnode): |
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54 # output: |
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55 # FILE := vfspath + '\0' + str(size) + '\0' + content |
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56 # OUTPUT := '' | FILE + OUTPUT |
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57 result = b'' |
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58 buildondemand = repo.ui.configbool( |
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59 b'fastannotate', b'serverbuildondemand', True |
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60 ) |
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61 with context.annotatecontext(repo, path) as actx: |
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62 if buildondemand: |
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63 # update before responding to the client |
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64 master = _getmaster(repo.ui) |
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65 try: |
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66 if not actx.isuptodate(master): |
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67 actx.annotate(master, master) |
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68 except Exception: |
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69 # non-fast-forward move or corrupted. rebuild automically. |
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70 actx.rebuild() |
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71 try: |
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72 actx.annotate(master, master) |
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73 except Exception: |
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74 actx.rebuild() # delete files |
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75 finally: |
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76 # although the "with" context will also do a close/flush, we |
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77 # need to do it early so we can send the correct respond to |
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78 # client. |
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79 actx.close() |
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80 # send back the full content of revmap and linelog, in the future we |
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81 # may want to do some rsync-like fancy updating. |
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82 # the lastnode check is not necessary if the client and the server |
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83 # agree where the main branch is. |
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84 if actx.lastnode != lastnode: |
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85 for p in [actx.revmappath, actx.linelogpath]: |
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86 if not os.path.exists(p): |
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87 continue |
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88 with open(p, b'rb') as f: |
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89 content = f.read() |
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90 vfsbaselen = len(repo.vfs.base + b'/') |
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91 relpath = p[vfsbaselen:] |
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92 result += b'%s\0%d\0%s' % (relpath, len(content), content) |
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93 return result |
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94 |
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95 |
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96 def _registerwireprotocommand(): |
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97 if b'getannotate' in wireprotov1server.commands: |
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98 return |
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99 wireprotov1server.wireprotocommand(b'getannotate', b'path lastnode')( |
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100 _getannotate |
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101 ) |
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102 |
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103 |
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104 def serveruisetup(ui): |
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105 _registerwireprotocommand() |
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106 extensions.wrapfunction(wireprotov1server, b'_capabilities', _capabilities) |
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107 |
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108 |
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109 # client-side |
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110 |
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111 |
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112 def _parseresponse(payload): |
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113 result = {} |
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114 i = 0 |
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115 l = len(payload) - 1 |
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116 state = 0 # 0: vfspath, 1: size |
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117 vfspath = size = b'' |
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118 while i < l: |
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119 ch = payload[i : i + 1] |
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120 if ch == b'\0': |
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121 if state == 1: |
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122 result[vfspath] = payload[i + 1 : i + 1 + int(size)] |
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123 i += int(size) |
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124 state = 0 |
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125 vfspath = size = b'' |
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126 elif state == 0: |
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127 state = 1 |
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128 else: |
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129 if state == 1: |
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130 size += ch |
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131 elif state == 0: |
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132 vfspath += ch |
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133 i += 1 |
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134 return result |
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135 |
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136 |
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137 def peersetup(ui, peer): |
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138 class fastannotatepeer(peer.__class__): |
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139 @wireprotov1peer.batchable |
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140 def getannotate(self, path, lastnode=None): |
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141 if not self.capable(b'getannotate'): |
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142 ui.warn(_(b'remote peer cannot provide annotate cache\n')) |
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143 yield None, None |
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144 else: |
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145 args = {b'path': path, b'lastnode': lastnode or b''} |
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146 f = wireprotov1peer.future() |
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147 yield args, f |
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148 yield _parseresponse(f.value) |
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149 |
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150 peer.__class__ = fastannotatepeer |
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151 |
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152 |
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153 @contextlib.contextmanager |
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154 def annotatepeer(repo): |
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155 ui = repo.ui |
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156 |
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157 remotedest = ui.config(b'fastannotate', b'remotepath', b'default') |
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158 r = urlutil.get_unique_pull_path(b'fastannotate', repo, ui, remotedest) |
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159 remotepath = r[0] |
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160 peer = hg.peer(ui, {}, remotepath) |
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161 |
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162 try: |
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163 yield peer |
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164 finally: |
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165 peer.close() |
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166 |
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167 |
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168 def clientfetch(repo, paths, lastnodemap=None, peer=None): |
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169 """download annotate cache from the server for paths""" |
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170 if not paths: |
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171 return |
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172 |
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173 if peer is None: |
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174 with annotatepeer(repo) as peer: |
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175 return clientfetch(repo, paths, lastnodemap, peer) |
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176 |
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177 if lastnodemap is None: |
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178 lastnodemap = {} |
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179 |
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180 ui = repo.ui |
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181 results = [] |
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182 with peer.commandexecutor() as batcher: |
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183 ui.debug(b'fastannotate: requesting %d files\n' % len(paths)) |
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184 for p in paths: |
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185 results.append( |
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186 batcher.callcommand( |
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187 b'getannotate', |
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188 {b'path': p, b'lastnode': lastnodemap.get(p)}, |
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189 ) |
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190 ) |
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191 |
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192 for result in results: |
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193 r = result.result() |
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194 # TODO: pconvert these paths on the server? |
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195 r = {util.pconvert(p): v for p, v in pycompat.iteritems(r)} |
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196 for path in sorted(r): |
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197 # ignore malicious paths |
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198 if not path.startswith(b'fastannotate/') or b'/../' in ( |
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199 path + b'/' |
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200 ): |
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201 ui.debug( |
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202 b'fastannotate: ignored malicious path %s\n' % path |
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203 ) |
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204 continue |
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205 content = r[path] |
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206 if ui.debugflag: |
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207 ui.debug( |
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208 b'fastannotate: writing %d bytes to %s\n' |
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209 % (len(content), path) |
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210 ) |
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211 repo.vfs.makedirs(os.path.dirname(path)) |
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212 with repo.vfs(path, b'wb') as f: |
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213 f.write(content) |
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214 |
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215 |
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216 def _filterfetchpaths(repo, paths): |
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217 """return a subset of paths whose history is long and need to fetch linelog |
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218 from the server. works with remotefilelog and non-remotefilelog repos. |
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219 """ |
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220 threshold = repo.ui.configint(b'fastannotate', b'clientfetchthreshold', 10) |
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221 if threshold <= 0: |
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222 return paths |
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223 |
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224 result = [] |
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225 for path in paths: |
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226 try: |
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227 if len(repo.file(path)) >= threshold: |
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228 result.append(path) |
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229 except Exception: # file not found etc. |
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230 result.append(path) |
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231 |
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232 return result |
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233 |
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234 |
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235 def localreposetup(ui, repo): |
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236 class fastannotaterepo(repo.__class__): |
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237 def prefetchfastannotate(self, paths, peer=None): |
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238 master = _getmaster(self.ui) |
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239 needupdatepaths = [] |
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240 lastnodemap = {} |
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241 try: |
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242 for path in _filterfetchpaths(self, paths): |
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243 with context.annotatecontext(self, path) as actx: |
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244 if not actx.isuptodate(master, strict=False): |
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245 needupdatepaths.append(path) |
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246 lastnodemap[path] = actx.lastnode |
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247 if needupdatepaths: |
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248 clientfetch(self, needupdatepaths, lastnodemap, peer) |
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249 except Exception as ex: |
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250 # could be directory not writable or so, not fatal |
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251 self.ui.debug(b'fastannotate: prefetch failed: %r\n' % ex) |
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252 |
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253 repo.__class__ = fastannotaterepo |
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254 |
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255 |
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256 def clientreposetup(ui, repo): |
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257 _registerwireprotocommand() |
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258 if repo.local(): |
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259 localreposetup(ui, repo) |
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260 # TODO: this mutates global state, but only if at least one repo |
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261 # has the extension enabled. This is probably bad for hgweb. |
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262 if peersetup not in hg.wirepeersetupfuncs: |
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263 hg.wirepeersetupfuncs.append(peersetup) |