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annotate trunk/src/dil/SettingsLoader.d @ 758:f4b9680c0e16

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Revised module dil.SettingsLoader.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Thu, 14 Feb 2008 03:31:19 +0100
parents ca7607226caa
children 9c47f377ca0b
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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 dil.SettingsLoader;
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6
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7 import dil.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 common;
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16
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17 import tango.io.FilePath;
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18
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19 struct SettingsLoader
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20 {
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21 InfoManager infoMan;
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22 Module mod; /// Current module.
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23
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24 static SettingsLoader opCall(InfoManager infoMan)
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25 {
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26 SettingsLoader sl;
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27 sl.infoMan = infoMan;
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28 return sl;
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29 }
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30
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31 void error(Token* token, char[] formatMsg, ...)
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32 {
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33 auto location = token.getErrorLocation();
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34 auto msg = Format(_arguments, _argptr, formatMsg);
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35 infoMan ~= new SemanticError(location, msg);
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36 }
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37
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38 T getValue(T)(char[] name)
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39 {
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40 auto var = mod.lookup(name);
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41 if (!var) // Returning T.init instead of null, because dmd gives an error.
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42 return error(mod.firstToken, "variable '{}' is not defined", name), T.init;
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43 auto t = var.node.begin;
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44 if (!var.isVariable)
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45 return error(t, "'{}' is not a variable declaration", name), T.init;
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46 auto value = var.to!(Variable).value;
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47 if (!value)
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48 return error(t, "'{}' variable has no value set", name), T.init;
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49 T val = value.Is!(T); // Try casting to T.
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50 if (!val)
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51 error(value.begin, "the value of '{}' is not of type {}", name, typeof(T).stringof);
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52 return val;
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53 }
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54
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55 T castTo(T)(Node n)
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56 {
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57 char[] type;
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58 is(T == StringExpression) && (type = "char[]");
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59 if (!n.Is!(T))
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60 error(n.begin, "expression is not of type {}", type);
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61 return n.Is!(T);
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62 }
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63
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64 void load()
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65 {
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66 scope execPath = new FilePath(GetExecutableFilePath());
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67 execPath = new FilePath(execPath.folder());
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68
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69 // Load config.d
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70 auto filePath = resolvePath(execPath, "config.d");
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71 mod = new Module(filePath, infoMan);
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72 mod.parse();
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73
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74 if (mod.hasErrors)
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75 return;
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76
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77 auto pass1 = new SemanticPass1(mod);
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78 pass1.start();
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79
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80 if (auto val = getValue!(StringExpression)("langfile"))
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81 GlobalSettings.langFile = val.getString();
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82
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83 if (auto array = getValue!(ArrayInitExpression)("import_paths"))
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84 foreach (value; array.values)
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85 if (auto str = castTo!(StringExpression)(value))
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86 GlobalSettings.importPaths ~= str.getString();
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87 if (auto array = getValue!(ArrayInitExpression)("ddoc_files"))
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88 foreach (value; array.values)
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89 if (auto str = castTo!(StringExpression)(value))
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90 GlobalSettings.ddocFilePaths ~= resolvePath(execPath, str.getString());
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91 if (auto val = getValue!(StringExpression)("lexer_error"))
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92 GlobalSettings.lexerErrorFormat = val.getString();
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93 if (auto val = getValue!(StringExpression)("parser_error"))
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94 GlobalSettings.parserErrorFormat = val.getString();
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95 if (auto val = getValue!(StringExpression)("semantic_error"))
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96 GlobalSettings.semanticErrorFormat = val.getString();
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97
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98 // Load language file.
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99 filePath = resolvePath(execPath, GlobalSettings.langFile);
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100 mod = new Module(filePath);
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101 mod.parse();
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102
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103 if (mod.hasErrors)
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104 return;
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105
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106 pass1 = new SemanticPass1(mod);
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107 pass1.start();
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108
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109 if (auto array = getValue!(ArrayInitExpression)("messages"))
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110 {
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111 char[][] messages;
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112 foreach (value; array.values)
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113 if (auto str = castTo!(StringExpression)(value))
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114 messages ~= str.getString();
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115 if (messages.length != MID.max+1)
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116 error(mod.firstToken,
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117 "messages table in {} must exactly have {} entries, but not {}.",
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118 filePath, MID.max+1, messages.length);
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119 GlobalSettings.messages = messages;
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120 dil.Messages.SetMessages(messages);
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121 }
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122 if (auto val = getValue!(StringExpression)("lang_code"))
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123 GlobalSettings.langCode = val.getString();
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124 }
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125 }
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126
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127 string resolvePath(FilePath execPath, string filePath)
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128 {
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129 if ((new FilePath(filePath)).isAbsolute())
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130 return filePath;
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131 return execPath.dup.append(filePath).toString();
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132 }
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133
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134 version(Windows)
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135 {
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136 private extern(Windows) uint GetModuleFileNameA(void*, char*, uint);
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137 /// Get the fully qualified path to this executable.
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138 char[] GetExecutableFilePath()
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139 {
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140 alias GetModuleFileNameA GetModuleFileName;
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141 char[] buffer = new char[256];
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142 uint count;
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143
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144 while (1)
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145 {
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146 if (buffer is null)
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147 return null;
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148
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149 count = GetModuleFileName(null, buffer.ptr, buffer.length);
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150 if (count == 0)
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151 return null;
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152 if (buffer.length != count && buffer[count] == 0)
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153 break;
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154 // Increase size of buffer
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155 buffer.length = buffer.length * 2;
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156 }
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157 assert(buffer[count] == 0);
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158 // Reduce buffer to the actual length of the string (excluding '\0'.)
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159 if (count < buffer.length)
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160 buffer.length = count;
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161 return buffer;
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162 }
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163 }
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164 else version(linux)
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165 {
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166 private extern(C) size_t readlink(char* path, char* buf, size_t bufsize);
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167 /// Get the fully qualified path to this executable.
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168 char[] GetExecutableFilePath()
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169 {
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170 char[] buffer = new char[256];
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171 size_t count;
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172
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173 while (1)
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174 {
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175 // This won't work on very old Linux systems.
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176 count = readlink("/proc/self/exe".ptr, buffer.ptr, buffer.length);
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177 if (count == -1)
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178 return null;
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179 if (count < buffer.length)
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180 break;
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181 buffer.length = buffer.length * 2;
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182 }
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183 buffer.length = count;
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184 return buffer;
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185 }
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186 }
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187 else
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188 static assert(0, "GetExecutableFilePath() is not implemented on this platform.");