annotate src/luan/modules/Boot.luan @ 1497:f04bfbb08721

link_from
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 08 May 2020 16:54:30 -0600
parents 580ee513a4b7
children d9a5405a3102
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8d95711f6615 replace java() with require "java"
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1 require "java"
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2 local System = require "java:java.lang.System"
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3 local URL = require "java:java.net.URL"
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4 local BasicLuan = require "java:luan.modules.BasicLuan"
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5 local new_error = BasicLuan.new_error
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6 local ipairs = BasicLuan.ipairs
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7 local set_metatable = BasicLuan.set_metatable
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8 local try = BasicLuan.try_
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9 local load = BasicLuan.load
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10 local type = BasicLuan.type
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11 local StringLuan = require "java:luan.modules.StringLuan"
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12 local match = StringLuan.match -- String.match
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13 local matches = StringLuan.matches -- String.matches
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14 local IoLuan = require "java:luan.modules.IoLuan"
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15 local LuanUrl = require "java:luan.modules.url.LuanUrl"
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16 local LuanJava = require "java:luan.Luan"
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17 local LuanTable = require "java:luan.LuanTable"
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18
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19
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20 local Boot = {}
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21
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22
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23 local function error(message)
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24 new_error(message).throw()
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25 end
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26 Boot.error = error
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27
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28 local function no_security(fn)
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29 LuanJava.checkCallerSecurity("no_security")
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30 return function(...)
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31 local security = LuanJava.setSecurity(nil)
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32 return try( {
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33 fn
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34 finally = function()
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35 security and LuanJava.setSecurity(security)
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36 end
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37 }, ... )
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38 end
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39 end
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40 Boot.no_security = no_security
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41
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42
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43 local function new_LuanIn(io)
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44 local this = {}
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45 this.java = io
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46 this.to_string = io.to_string
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47 this.read_text = io.read_text
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48 this.read_binary = io.read_binary
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49 this.read_lines = io.read_lines
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50 this.read_blocks = io.read_blocks
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51 this.exists = io.exists
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52 this.checksum = io.checksum
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53 this.charset = io.charset
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54 this.set_charset = io.set_charset
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55 this.to_uri_string = io.to_uri_string
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56 return this
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57 end
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58 Boot.new_LuanIn = new_LuanIn
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59
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60 local function new_writer(writer)
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61 local this = {}
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62 this.java = writer
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63 this.write = writer.write
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64 this.close = writer.close
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65 return this
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66 end
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67
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68 function Boot.text_writer(out)
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69 return new_writer( IoLuan.luanWriter(out) )
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70 end
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71
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72 Boot.binary_writer = new_writer
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73
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74 local function new_LuanIO(io)
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75 local this = new_LuanIn(io)
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76 this.write = io.write
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77 this.write_text = io.write_text
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78 this.write_binary = io.write_binary
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79
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80 function this.text_writer()
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81 return new_writer( io.text_writer() )
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82 end
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83
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84 function this.binary_writer()
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85 return new_writer( io.binary_writer() )
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86 end
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87
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88 return this
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89 end
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90
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91 local schemes = {}
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92 LuanTable.setSecurity(schemes,"schemes")
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93
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94 function schemes.null(path)
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95 return new_LuanIO( IoLuan.nullIO )
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96 end
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97
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98 function schemes.string(path)
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99 return new_LuanIO( IoLuan.LuanString.new(path) )
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100 end
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101
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102 function schemes.classpath(path)
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103 local cp = IoLuan.classpath(path)
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104 return cp and new_LuanIn(cp)
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105 end
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106
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107 function schemes.luan(path)
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108 return schemes.classpath("luan/modules/"..path)
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109 end
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110
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111 function schemes.stdin(path)
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112 local Io = require "luan:Io.luan"
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113 return Io.stdin
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114 end
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115
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116
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117 local function new_LuanUrl(io)
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118 local this = new_LuanIn(io)
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119
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120 local function check()
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121 io.httpCon or error "must open first"
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122 end
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123
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124 function this.get_header(name)
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125 check()
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126 return io.httpCon.getHeaderField(name)
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127 end
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128
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129 function this.get_response_code()
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130 check()
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131 return io.httpCon.getResponseCode()
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132 end
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133
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134 function this.get_response_message()
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135 check()
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136 return io.httpCon.getResponseMessage()
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137 end
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138
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139 return this
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140 end
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141
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142 local function url(path,options)
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143 return new_LuanUrl( LuanUrl.new(URL.new(path),options) )
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144 end
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145
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146 function schemes.http(path,options)
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147 return url( "http:"..path, options )
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148 end
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149
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150 function schemes.https(path,options)
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151 return url( "https:"..path, options )
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152 end
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153
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154 local function new_BaseOs(io)
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155 local this = new_LuanIO(io)
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156 this.wait_for = io.wait_for
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157 return this
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158 end
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159
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160 function schemes.os(path,options)
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161 return new_BaseOs( IoLuan.LuanOs.new(path,options) )
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162 end
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163
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164 function schemes.bash(path,options)
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165 return new_BaseOs( IoLuan.LuanBash.new(path,options) )
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166 end
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167
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168 local function new_LuanFile(io)
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169 local this = new_LuanIO(io)
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170 this.name = io.file.getName
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171 this.is_directory = io.file.isDirectory
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172 this.is_file = io.file.isFile
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173 this.delete = io.delete
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174 this.delete_on_exit = io.file.deleteOnExit
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175 this.mkdir = io.mkdir
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176 this.last_modified = io.file.lastModified
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177 this.set_last_modified = io.set_last_modified
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178 this.length = io.file.length
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179 this.rename_to = io.rename_to
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180 this.link_from = io.link_from
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181 this.symlink_from = io.symlink_from
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182 this.is_symbolic_link = io.is_symbolic_link
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183
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184 function this.child(name)
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185 return new_LuanFile( io.child(name) )
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186 end
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187
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188 function this.children()
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189 local raw = io.children()
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190 if raw == nil then
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191 return nil
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192 end
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193 local rtn = {}
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194 for _, child in ipairs(raw) do
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195 rtn[#rtn+1] = new_LuanFile(child)
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196 end
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197 return rtn
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198 end
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199
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200 function this.parent()
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201 return new_LuanFile( io.parent() )
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202 end
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203
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204 function this.canonical()
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205 return new_LuanFile( io.canonical() )
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206 end
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207
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208 function this.create_temp_file(prefix,suffix)
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209 return new_LuanFile( io.create_temp_file(prefix,suffix) )
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210 end
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211
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212 return this
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213 end
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214
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215 function schemes.file(path)
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216 return new_LuanFile( IoLuan.LuanFile.new(path) )
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217 end
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218
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219 Boot.schemes = schemes
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220
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221
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222 local function uri(name,options)
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223 local scheme, location = match( name, "(?s)^([^:]+):(.*)$" )
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224 scheme or error( "invalid Io.uri name '"..name.."', missing scheme" )
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225 local opener = schemes[scheme] or error( "invalid scheme '"..scheme.."' in '"..name.."'" )
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226 return opener(location,options)
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227 end
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228 Boot.uri = uri
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229
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230
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231 function Boot.read(uri_str) -- for PackageLuan.java
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232 local u = uri(uri_str)
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233 if u==nil or not u.exists() then
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234 return nil
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235 end
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236 return u.read_text()
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237 end
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238
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239 function Boot.load_file(file)
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240 if type(file) == "string" then
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241 if not matches(file,":") then
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242 file = "file:"..file
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243 end
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244 local u = uri(file)
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245 if u==nil or not u.exists() then
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246 return nil
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247 end
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248 local src = u.read_text()
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249 return load(src,file,true)
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250 elseif type(file) == "table" and file.read_text ~= nil then
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251 local src = file.read_text()
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252 local src_file = file.uri_string or file.to_uri_string()
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253 return load(src,src_file,true)
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254 else
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255 error("bad argument, expected string or uri table but got "..type(file))
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256 end
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257 end
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258
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259
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260 local error_mt = {}
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261
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262 function error_mt.__to_string(t)
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263 return t.java.getLuanStackTraceString()
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264 end
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265
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266 function Boot.new_error_table(ex) -- for LuanException.java
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267 local this = {}
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268 set_metatable(this,error_mt)
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269 this.java = ex
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270 this.get_message = ex.getMessage
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271 this.throw = ex.throwThis
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272 this.get_stack_trace_string = ex.getLuanStackTraceString
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273 this.get_java_stack_trace_string = ex.getJavaStackTraceString
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274 return this
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275 end
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276
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277
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278 return Boot