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Refactored the config file and how it is loaded.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Thu, 21 Aug 2008 17:51:04 +0200
parents c60bd5cd61da
children
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module SettingsLoader;
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6
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7 import Settings;
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8 import dil.Messages;
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9 import dil.ast.Node, dil.ast.Declarations, dil.ast.Expressions;
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10 import dil.semantic.Module;
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11 import dil.semantic.Pass1;
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12 import dil.semantic.Symbol;
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13 import dil.semantic.Symbols;
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14 import dil.Information;
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15 import dil.Compilation;
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16 import common;
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17
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18 import tango.io.FilePath;
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19 import tango.sys.Environment;
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20 import tango.text.Util : substitute;
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21
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22 /// Loads settings from a D module file.
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23 abstract class SettingsLoader
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24 {
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25 InfoManager infoMan; /// Collects error messages.
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26 Module mod; /// Current module.
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27
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28 this(InfoManager infoMan)
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29 {
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30 this.infoMan = infoMan;
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31 }
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32
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33 /// Creates an error report.
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34 /// Params:
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35 /// token = where the error occurred.
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36 /// formatMsg = error message.
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37 void error(Token* token, char[] formatMsg, ...)
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38 {
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39 auto location = token.getErrorLocation();
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40 auto msg = Format(_arguments, _argptr, formatMsg);
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41 infoMan ~= new SemanticError(location, msg);
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42 }
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43
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44 T getValue(T)(char[] name)
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45 {
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46 auto var = mod.lookup(name);
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47 if (!var) // Returning T.init instead of null, because dmd gives an error.
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48 return error(mod.firstToken, "variable '{}' is not defined", name), T.init;
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49 auto t = var.node.begin;
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50 if (!var.isVariable)
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51 return error(t, "'{}' is not a variable declaration", name), T.init;
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52 auto value = var.to!(Variable).value;
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53 if (!value)
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54 return error(t, "'{}' variable has no value set", name), T.init;
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55 T val = value.Is!(T); // Try casting to T.
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56 if (!val)
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57 error(value.begin, "the value of '{}' is not of type {}", name, T.stringof);
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58 return val;
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59 }
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60
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61 T castTo(T)(Node n)
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62 {
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63 char[] type;
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64 is(T == StringExpression) && (type = "char[]");
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65 if (!n.Is!(T))
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66 error(n.begin, "expression is not of type {}", type);
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67 return n.Is!(T);
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68 }
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69
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70 void load()
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71 {}
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72 }
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73
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74 /// Loads the configuration file of dil.
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75 class ConfigLoader : SettingsLoader
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76 {
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77 static string configFileName = "config.d"; /// Name of the configuration file.
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78 string executablePath; /// Absolute path to the executable of dil.
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79 string executableDir; /// Absolte path to the directory of the executable of dil.
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80 string dataDir; /// Absolute path to dil's data directory.
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81 string homePath; /// Path to the home directory.
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82
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83 this(InfoManager infoMan)
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84 {
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85 super(infoMan);
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86 }
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87
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88 static ConfigLoader opCall(InfoManager infoMan)
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89 {
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90 return new ConfigLoader(infoMan);
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91 }
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92
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93 string expandVariables(string val)
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94 {
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95 val = substitute(val, "${DATADIR}", dataDir);
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96 val = substitute(val, "${HOME}", homePath);
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97 val = substitute(val, "${EXECDIR}", executableDir);
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98 return val;
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99 }
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100
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101 void load()
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102 {
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103 homePath = Environment.get("HOME");
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104 executablePath = GetExecutableFilePath();
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105 executableDir = (new FilePath(executablePath)).folder();
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106
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107 // Load the configuration file.
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108 auto filePath = findConfigurationFilePath();
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109 if (filePath is null)
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110 {
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111 infoMan ~= new Error(new Location("",0),
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112 "the configuration file "~configFileName~" could not be found.");
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113 return;
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114 }
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115 mod = new Module(filePath, infoMan);
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116 mod.parse();
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117
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118 if (mod.hasErrors)
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119 return;
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120
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121 auto context = new CompilationContext;
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122 auto pass1 = new SemanticPass1(mod, context);
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123 pass1.run();
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124
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125 // Initialize the dataDir member.
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126 if (auto val = getValue!(StringExpression)("DATADIR"))
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127 dataDir = val.getString();
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128 dataDir = resolvePath(executableDir, dataDir);
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129 GlobalSettings.dataDir = dataDir;
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130
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131 if (auto array = getValue!(ArrayInitExpression)("VERSION_IDS"))
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132 foreach (value; array.values)
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133 if (auto val = castTo!(StringExpression)(value))
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134 GlobalSettings.versionIds ~= val.getString();
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135 if (auto val = getValue!(StringExpression)("LANG_FILE"))
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136 GlobalSettings.langFile = expandVariables(val.getString());
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137 if (auto array = getValue!(ArrayInitExpression)("IMPORT_PATHS"))
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138 foreach (value; array.values)
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139 if (auto val = castTo!(StringExpression)(value))
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140 GlobalSettings.importPaths ~= expandVariables(val.getString());
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141 if (auto array = getValue!(ArrayInitExpression)("DDOC_FILES"))
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142 foreach (value; array.values)
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diff changeset
143 if (auto val = castTo!(StringExpression)(value))
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Aziz K?ksal <aziz.koeksal@gmail.com>
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144 GlobalSettings.ddocFilePaths ~= expandVariables(val.getString());
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145 if (auto val = getValue!(StringExpression)("XML_MAP"))
4063da6f3edd Refactored the config file and how it is loaded.
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146 GlobalSettings.xmlMapFile = expandVariables(val.getString());
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diff changeset
147 if (auto val = getValue!(StringExpression)("HTML_MAP"))
4063da6f3edd Refactored the config file and how it is loaded.
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148 GlobalSettings.htmlMapFile = expandVariables(val.getString());
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diff changeset
149 if (auto val = getValue!(StringExpression)("LEXER_ERROR"))
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150 GlobalSettings.lexerErrorFormat = val.getString();
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151 if (auto val = getValue!(StringExpression)("PARSER_ERROR"))
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152 GlobalSettings.parserErrorFormat = val.getString();
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153 if (auto val = getValue!(StringExpression)("SEMANTIC_ERROR"))
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154 GlobalSettings.semanticErrorFormat = val.getString();
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155
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156 // Load language file.
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157 // TODO: create a separate class for this?
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158 filePath = expandVariables(GlobalSettings.langFile);
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159 mod = new Module(filePath);
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160 mod.parse();
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161
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162 if (mod.hasErrors)
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163 return;
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164
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165 pass1 = new SemanticPass1(mod, context);
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525ee3f848d9 Added modules cmd.Compile and dil.ModuleManager.
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166 pass1.run();
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167
f4b9680c0e16 Revised module dil.SettingsLoader.
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168 if (auto array = getValue!(ArrayInitExpression)("messages"))
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169 {
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170 char[][] messages;
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171 foreach (value; array.values)
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172 if (auto val = castTo!(StringExpression)(value))
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173 messages ~= val.getString();
758
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diff changeset
174 if (messages.length != MID.max+1)
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Aziz K?ksal <aziz.koeksal@gmail.com>
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175 error(mod.firstToken,
f4b9680c0e16 Revised module dil.SettingsLoader.
Aziz K?ksal <aziz.koeksal@gmail.com>
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176 "messages table in {} must exactly have {} entries, but not {}.",
f4b9680c0e16 Revised module dil.SettingsLoader.
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diff changeset
177 filePath, MID.max+1, messages.length);
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178 GlobalSettings.messages = messages;
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179 dil.Messages.SetMessages(messages);
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180 }
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f4b9680c0e16 Revised module dil.SettingsLoader.
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diff changeset
181 if (auto val = getValue!(StringExpression)("lang_code"))
f4b9680c0e16 Revised module dil.SettingsLoader.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
182 GlobalSettings.langCode = val.getString();
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183 }
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184
4063da6f3edd Refactored the config file and how it is loaded.
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185 /// Searches for the configuration file of dil.
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186 /// Returns: the filePath or null if the file couldn't be found.
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187 string findConfigurationFilePath()
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188 {
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189 // 1. Look in environment variable DILCONF.
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190 auto filePath = new FilePath(Environment.get("DILCONF"));
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191 if (filePath.exists())
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Aziz K?ksal <aziz.koeksal@gmail.com>
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192 return filePath.toString();
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193 // 2. Look in the current working directory.
4063da6f3edd Refactored the config file and how it is loaded.
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194 filePath.set(this.configFileName);
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Aziz K?ksal <aziz.koeksal@gmail.com>
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195 if (filePath.exists())
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Aziz K?ksal <aziz.koeksal@gmail.com>
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196 return filePath.toString();
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Aziz K?ksal <aziz.koeksal@gmail.com>
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197 // 3. Look in the directory set by HOME.
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198 filePath.set(this.homePath);
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199 filePath.append(this.configFileName);
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200 if (filePath.exists())
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Aziz K?ksal <aziz.koeksal@gmail.com>
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201 return filePath.toString();
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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202 // 4. Look in the binary's directory.
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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203 filePath.set(this.executableDir);
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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204 filePath.append(this.configFileName);
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
205 if (filePath.exists())
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Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
206 return filePath.toString();
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207 return null;
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208 }
513
6160ab7b1816 Refactored code related to settings.
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diff changeset
209 }
6160ab7b1816 Refactored code related to settings.
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210
798
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diff changeset
211 /// Loads an associative array from a D module file.
759
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
212 class TagMapLoader : SettingsLoader
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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213 {
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
214 this(InfoManager infoMan)
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
215 {
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
216 super(infoMan);
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
217 }
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
218
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
219 static TagMapLoader opCall(InfoManager infoMan)
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
220 {
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
221 return new TagMapLoader(infoMan);
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
222 }
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
223
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
224 string[string] load(string filePath)
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
225 {
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
226 mod = new Module(filePath, infoMan);
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
227 mod.parse();
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
228 if (mod.hasErrors)
9c47f377ca0b Revised module cmd.Generate.
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diff changeset
229 return null;
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
230
778
78be32e3e157 Implemented conditional compilation.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
231 auto context = new CompilationContext;
78be32e3e157 Implemented conditional compilation.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 759
diff changeset
232 auto pass1 = new SemanticPass1(mod, context);
810
525ee3f848d9 Added modules cmd.Compile and dil.ModuleManager.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 806
diff changeset
233 pass1.run();
759
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
234
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
235 string[string] map;
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
236 if (auto array = getValue!(ArrayInitExpression)("map"))
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
237 foreach (i, value; array.values)
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
238 {
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 758
diff changeset
239 auto key = array.keys[i];
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
240 if (auto valExp = castTo!(StringExpression)(value))
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 758
diff changeset
241 if (!key)
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 758
diff changeset
242 error(value.begin, "expected key : value");
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 758
diff changeset
243 else if (auto keyExp = castTo!(StringExpression)(key))
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
244 map[keyExp.getString()] = valExp.getString();
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
245 }
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 758
diff changeset
246 return map;
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
247 }
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
248 }
9c47f377ca0b Revised module cmd.Generate.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
249
798
c24be8d4f6ab Added documentation comments.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
250 /// Resolves the path to a file from the executable's dir path
c24be8d4f6ab Added documentation comments.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 779
diff changeset
251 /// if it is relative.
c24be8d4f6ab Added documentation comments.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
252 /// Returns: filePath if it is absolute or execPath + filePath.
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Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
253 string resolvePath(string execPath, string filePath)
721
8955296dd807 Added ddoc_files option to config.d
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
254 {
839
4063da6f3edd Refactored the config file and how it is loaded.
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diff changeset
255 scope path = new FilePath(filePath);
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
256 if (path.isAbsolute())
721
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Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
257 return filePath;
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diff changeset
258 path.set(execPath).append(filePath);
4063da6f3edd Refactored the config file and how it is loaded.
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
259 return path.toString();
721
8955296dd807 Added ddoc_files option to config.d
Aziz K?ksal <aziz.koeksal@gmail.com>
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diff changeset
260 }
8955296dd807 Added ddoc_files option to config.d
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 695
diff changeset
261
779
8e6fed11bb68 Moved Settings.d and SettingsLoader.d to src/.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 778
diff changeset
262 version(DDoc)
8e6fed11bb68 Moved Settings.d and SettingsLoader.d to src/.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 778
diff changeset
263 {
8e6fed11bb68 Moved Settings.d and SettingsLoader.d to src/.
Aziz K?ksal <aziz.koeksal@gmail.com>
parents: 778
diff changeset
264 /// Returns the fully qualified path to this executable.
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265 char[] GetExecutableFilePath();
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266 }
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267 else version(Windows)
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268 {
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269 private extern(Windows) uint GetModuleFileNameA(void*, char*, uint);
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270
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271 char[] GetExecutableFilePath()
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272 {
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273 alias GetModuleFileNameA GetModuleFileName;
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274 char[] buffer = new char[256];
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275 uint count;
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276
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277 while (1)
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278 {
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279 if (buffer is null)
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280 return null;
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281
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282 count = GetModuleFileName(null, buffer.ptr, buffer.length);
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283 if (count == 0)
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284 return null;
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285 if (buffer.length != count && buffer[count] == 0)
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286 break;
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287 // Increase size of buffer
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288 buffer.length = buffer.length * 2;
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289 }
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290 assert(buffer[count] == 0);
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291 // Reduce buffer to the actual length of the string (excluding '\0'.)
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292 if (count < buffer.length)
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293 buffer.length = count;
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294 return buffer;
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295 }
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296 }
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297 else version(linux)
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298 {
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299 private extern(C) size_t readlink(char* path, char* buf, size_t bufsize);
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300
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301 char[] GetExecutableFilePath()
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302 {
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303 char[] buffer = new char[256];
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304 size_t count;
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305
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306 while (1)
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307 {
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308 // This won't work on very old Linux systems.
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309 count = readlink("/proc/self/exe".ptr, buffer.ptr, buffer.length);
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310 if (count == -1)
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311 return null;
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312 if (count < buffer.length)
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313 break;
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314 buffer.length = buffer.length * 2;
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315 }
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316 buffer.length = count;
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317 return buffer;
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318 }
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319 }
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320 else
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321 static assert(0, "GetExecutableFilePath() is not implemented on this platform.");