1 | var fs = require('fs-extra');
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2 |
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3 | var async = require('async');
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4 | var nomnom = require('nomnom');
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5 |
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6 | var generateInfo = require('./generate-info');
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 | function getConfig(configPath, callback) {
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18 | if (configPath) {
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19 | fs.readFile(configPath, function(err, data) {
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20 | if (err) {
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21 | callback(err);
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22 | return;
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23 | }
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24 | var obj;
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25 | try {
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26 | obj = JSON.parse(String(data));
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27 | } catch (err2) {
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28 | callback(new Error('Trouble parsing file as JSON: ' + configPath));
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29 | return;
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30 | }
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31 | var patterns = obj.exports;
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32 | if (patterns && !Array.isArray(patterns)) {
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33 | callback(new Error('Expected an exports array, got: ' + patterns));
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34 | return;
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35 | }
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36 | var namespace = obj.namespace;
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37 | if (namespace && typeof namespace !== 'string') {
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38 | callback(new Error('Expected an namespace string, got: ' +
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39 | namespace));
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40 | return;
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41 | }
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42 | callback(null, obj);
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43 | });
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44 | } else {
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45 | process.nextTick(function() {
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46 | callback(null, {exports: ['*']});
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47 | });
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48 | }
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49 | }
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50 |
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51 |
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52 |
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53 |
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54 |
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55 |
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56 |
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57 |
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58 | function getSymbols(patterns, callback) {
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59 | generateInfo(function(err) {
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60 | if (err) {
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61 | callback(new Error('Trouble generating info: ' + err.message));
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62 | return;
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63 | }
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64 | var symbols = require('../build/info.json').symbols;
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65 | callback(null, patterns, symbols);
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66 | });
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67 | }
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68 |
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69 |
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70 |
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71 |
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72 |
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73 |
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74 |
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75 |
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76 |
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77 |
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78 |
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79 |
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80 |
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81 |
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82 | function filterSymbols(patterns, symbols, callback) {
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83 | var matches = [];
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84 |
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85 | var provides = {};
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86 | var lookup = {};
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87 | symbols.forEach(function(symbol) {
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88 | lookup[symbol.name] = symbol;
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89 | symbol.provides.forEach(function(provide) {
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90 | provides[provide] = true;
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91 | });
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92 | });
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93 |
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94 | patterns.forEach(function(name) {
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95 | var match = false;
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96 | var pattern = (name.substr(-1) === '*');
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97 | if (pattern) {
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98 | name = name.substr(0, name.length - 1);
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99 | symbols.forEach(function(symbol) {
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100 | if (symbol.name.indexOf(name) === 0) {
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101 | matches.push(symbol);
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102 | match = true;
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103 | }
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104 | });
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105 | } else {
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106 | var symbol = lookup[name];
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107 | if (symbol) {
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108 | matches.push(symbol);
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109 | match = true;
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110 | }
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111 | }
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112 | if (!match) {
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113 | var message = 'No matching symbol found: ' + name + (pattern ? '*' : '');
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114 | callback(new Error(message));
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115 | }
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116 | });
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117 |
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118 | callback(null, matches, Object.keys(provides).sort());
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119 | }
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120 |
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121 |
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122 |
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123 |
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124 |
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125 |
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126 |
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127 |
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128 |
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129 | function formatSymbolExport(name, namespace) {
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130 | return 'goog.exportSymbol(\n' +
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131 | ' \'' + name + '\',\n' +
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132 | ' ' + name +
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133 | (namespace ? ',\n ' + namespace : '') + ');\n';
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134 | }
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135 |
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136 |
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137 |
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138 |
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139 |
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140 |
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141 |
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142 | function formatPropertyExport(name) {
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143 | var parts = name.split('#');
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144 | var prototype = parts[0] + '.prototype';
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145 | var property = parts[1];
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146 | return 'goog.exportProperty(\n' +
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147 | ' ' + prototype + ',\n' +
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148 | ' \'' + property + '\',\n' +
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149 | ' ' + prototype + '.' + property + ');\n';
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150 | }
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151 |
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152 |
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153 |
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154 |
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155 |
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156 |
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157 |
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158 |
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159 |
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160 | function generateExports(symbols, namespace, provides) {
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161 | var blocks = [];
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162 | provides.forEach(function(provide) {
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163 | blocks.push('goog.require(\'' + provide + '\');');
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164 | });
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165 | blocks.push('\n\n');
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166 | symbols.forEach(function(symbol) {
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167 | var name = symbol.name;
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168 | if (name.indexOf('#') > 0) {
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169 | blocks.push(formatPropertyExport(name));
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170 | } else {
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171 | blocks.push(formatSymbolExport(name, namespace));
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172 | }
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173 | });
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174 | blocks.unshift(
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175 | '/**\n' +
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176 | ' * @fileoverview Custom exports file.\n' +
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177 | ' * @suppress {checkVars,extraRequire}\n' +
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178 | ' */\n');
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179 | return blocks.join('\n');
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180 | }
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181 |
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182 |
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183 |
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184 |
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185 |
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186 |
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187 |
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188 |
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189 |
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190 | function main(config, callback) {
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191 | async.waterfall([
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192 | getSymbols.bind(null, config.exports),
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193 | filterSymbols,
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194 | function(symbols, provides, done) {
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195 | var code, err;
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196 | try {
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197 | code = generateExports(symbols, config.namespace, provides);
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198 | } catch (e) {
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199 | err = e;
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200 | }
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201 | done(err, code);
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202 | }
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203 | ], callback);
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204 | }
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205 |
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206 |
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207 |
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208 |
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209 |
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210 |
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211 | if (require.main === module) {
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212 | var options = nomnom.options({
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213 | output: {
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214 | position: 0,
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215 | required: true,
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216 | help: 'Output file path'
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217 | },
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218 | config: {
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219 | abbr: 'c',
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220 | help: 'Path to JSON config file',
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221 | metavar: 'CONFIG'
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222 | }
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223 | }).parse();
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224 |
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225 | async.waterfall([
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226 | getConfig.bind(null, options.config),
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227 | main,
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228 | fs.outputFile.bind(fs, options.output)
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229 | ], function(err) {
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230 | if (err) {
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231 | process.stderr.write(err.message + '\n');
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232 | process.exit(1);
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233 | } else {
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234 | process.exit(0);
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235 | }
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236 | });
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237 | }
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238 |
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239 |
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240 |
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241 |
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242 |
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243 | module.exports = main;
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