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annotate src/luan/modules/lucene/Lucene.luan @ 1532:060ff7695317

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Lucene.type.lowercase
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 02 Aug 2020 17:01:25 -0600
parents fa39e3c356ae
children 28f06ac6ce39
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1353
8d95711f6615 replace java() with require "java"
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1 require "java"
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2 local Luan = require "luan:Luan.luan"
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3 local error = Luan.error
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4 local ipairs = Luan.ipairs or error()
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5 local pairs = Luan.pairs or error()
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6 local type = Luan.type or error()
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7 local set_metatable = Luan.set_metatable or error()
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8 local Boot = require "luan:Boot.luan"
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9 local Html = require "luan:Html.luan"
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10 local Number = require "luan:Number.luan"
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11 local integer = Number.integer or error()
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12 local Io = require "luan:Io.luan"
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13 local uri = Io.uri or error()
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14 local String = require "luan:String.luan"
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15 local matches = String.matches or error()
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16 local Rpc = require "luan:Rpc.luan"
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17 local LuceneIndex = require "java:luan.modules.lucene.LuceneIndex"
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18 local NumberFieldParser = require "java:goodjava.lucene.queryparser.NumberFieldParser"
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19 local GoodQueryParser = require "java:goodjava.lucene.queryparser.GoodQueryParser"
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20 local Logging = require "luan:logging/Logging.luan"
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21 local logger = Logging.logger "Lucene"
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22
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23
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24 local Lucene = {}
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25
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26 Lucene.type = {
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27 english = LuceneIndex.ENGLISH_FIELD_PARSER
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28 string = LuceneIndex.STRING_FIELD_PARSER
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060ff7695317 Lucene.type.lowercase
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29 lowercase = LuceneIndex.LOWERCASE_FIELD_PARSER
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30 integer = NumberFieldParser.INT
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31 long = NumberFieldParser.LONG
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32 double = NumberFieldParser.DOUBLE
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33 }
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34
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35 Lucene.quote = GoodQueryParser.quote
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36
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37 function Lucene.index(index_dir,options)
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38 type(index_dir)=="table" or error "index_dir must be table"
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39 index_dir.to_uri_string and matches(index_dir.to_uri_string(),"^file:") or error "must be file"
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40 options = options or {}
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41 local index = {}
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42 index.dir = index_dir
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43 local java_index = LuceneIndex.getLuceneIndex(index_dir.java.file,options)
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44 index.java = java_index
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45
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46 index.indexed_fields = {}
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47 local mt = {}
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48 set_metatable(index.indexed_fields,mt)
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49 function mt.__index(_,key)
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50 return java_index.getIndexedFieldParser(key)
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51 end
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52 function mt.__new_index(_,key,value)
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53 return java_index.setIndexedFieldParser(key,value)
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54 end
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55
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56 index.to_string = java_index.to_string
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57 index.snapshot = java_index.snapshot
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58 index.advanced_search = java_index.advanced_search
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59 index.search_in_transaction = java_index.search_in_transaction
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60 index.delete_all = java_index.delete_all
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61 index.delete = java_index.delete
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62 index.save = java_index.save
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63 index.run_in_transaction = java_index.run_in_transaction
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64 index.ensure_open = java_index.ensure_open
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65 index.next_id = java_index.nextId
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66 index.highlighter = java_index.highlighter
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67 index.count_tokens = java_index.count_tokens
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68 --index.close = java_index.close
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69
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70 index.has_postgres_backup = java_index.hasPostgresBackup()
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71 index.rebuild_postgres_backup = java_index.rebuild_postgres_backup
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72 index.restore_from_postgres = java_index.restore_from_postgres
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73 index.force_restore_from_postgres = java_index.force_restore_from_postgres
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74 index.check = java_index.check
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75
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76 function index.search( query, from, to, options )
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77 from or error "missing 'from' parameter"
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78 to or error "missing 'to' parameter"
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79 options = options or {}
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80 local explain_fld = options.explain
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81 local score_fld = options.score
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82 local results = {}
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83 local function fn(i,doc_fn,score)
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84 if i >= from then
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85 local doc
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86 if explain_fld == nil then
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87 doc = doc_fn()
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88 else
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89 local explanation
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90 doc, explanation = doc_fn("explain")
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91 doc[explain_fld] = explanation.toString()
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92 end
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93 if score_fld ~= nil then
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94 doc[score_fld] = score
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95 end
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96 results[#results+1] = doc
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97 end
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98 end
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99 local total_hits = index.advanced_search(query,fn,to,options.sort)
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100 return results, total_hits
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101 end
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102
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103 function index.get_document(query)
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104 local doc
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105 local function fn(_,doc_fn,_)
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106 doc = doc_fn()
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107 end
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108 local total_hits = index.advanced_search(query,fn,1)
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109 total_hits <= 1 or error("found "..total_hits.." documents for query: "..query)
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110 return doc
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111 end
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112
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113 function index.count(query)
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114 return index.advanced_search(query)
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115 end
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116
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117 function index.html_highlighter(query,formatter,container_tags)
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118 local highlighter = index.highlighter(query,formatter)
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119 return function(html)
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120 local list = Html.parse(html,container_tags)
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121 local result = {}
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122 for _, obj in ipairs(list) do
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123 if type(obj) == "string" then
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124 obj = highlighter(obj)
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125 end
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126 result[#result+1] = obj
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127 end
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128 return Html.to_string(result)
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129 end
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130 end
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131
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132 function index.zip(zip_file)
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133 index.snapshot( function(dir_path,file_names)
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134 zip_file.delete()
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135 local zip_path = zip_file.canonical().to_string()
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136 local dir = uri("file:"..dir_path)
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137 local dir_name = dir.name()
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138 local options = {dir=dir.parent()}
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139 for _, file_name in ipairs(file_names) do
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140 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name
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141 uri("os:"..cmd,options).read_text()
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142 end
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143 end )
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144 end
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145 index.zip = Boot.no_security(index.zip)
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146
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147 function index.restore(zip_file)
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148 java_index.run_in_lock( function()
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149 local lucene_dir = index.dir
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150 local before_restore = lucene_dir.parent().child("before_restore.zip")
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151 index.zip(before_restore)
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152 java_index.close()
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153 lucene_dir.delete()
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154 uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text()
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155 java_index.reopen()
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156 end )
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157 end
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158 index.restore = Boot.no_security(index.restore)
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159
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160 function index.update(steps)
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161 local version = 0
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162 for i in pairs(steps) do
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163 if version < i then
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164 version = i
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165 end
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166 end
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167 local doc = index.get_document"type:version" or { type="version", version=integer(0) }
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168 while doc.version < version do
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169 doc.version = integer(doc.version + 1)
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170 logger.error("step "..doc.version)
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171 index.run_in_transaction( function()
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172 local step = steps[doc.version] or error("missing step "..doc.version)
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173 step()
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174 index.save(doc)
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175 end )
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176 end
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177 end
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178
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179 local function multi_error()
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180 error "multiple lucene instances"
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181 end
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182
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183 if Rpc.functions.lucene_backup == nil then
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184
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185 function Rpc.functions.lucene_backup(password)
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186 Io.password == password or error "wrong password"
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187 local zip_file = index.dir.parent().child("backup.zip")
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188 index.zip(zip_file)
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189 return zip_file
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190 end
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191
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192 function Rpc.functions.lucene_restore(password,zip_file)
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193 Io.password == password or error "wrong password"
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194 local backup_zip = index.dir.parent().child("backup.zip")
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195 backup_zip.write(zip_file)
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196 index.restore(backup_zip)
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197 end
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198
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199 else
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200 Rpc.functions.lucene_backup = multi_error
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201 Rpc.functions.lucene_restore = multi_error
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202 end
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203
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204 return index
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205 end
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206
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207 return Lucene