mirror of https://github.com/webpack/webpack.git
47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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var ConstDependency = require("./dependencies/ConstDependency");
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var BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
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function DefinePlugin(definitions) {
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this.definitions = definitions;
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}
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module.exports = DefinePlugin;
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DefinePlugin.prototype.apply = function(compiler) {
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var definitions = this.definitions;
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Object.keys(definitions).forEach(function(key) {
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var value = definitions[key];
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var code = "(" + JSON.stringify(value, function(key, value) {
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if(typeof value === "function") return value.toString();
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if(value instanceof RegExp) return value.toString();
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if(value instanceof Date) return "new Date(" + value.getTime() + ")";
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return value;
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}) + ")";
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compiler.parser.plugin("evaluate Identifier " + key, function(expr) {
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var res = new BasicEvaluatedExpression();
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res.set(value);
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res.setRange(expr.range);
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return res;
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});
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compiler.parser.plugin("evaluate typeof " + key, function(expr) {
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var res = new BasicEvaluatedExpression();
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res.setString(typeof value);
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res.setRange(expr.range);
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return res;
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});
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compiler.parser.plugin("expression " + key, function(expr) {
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var dep = new ConstDependency(code, expr.range);
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dep.loc = expr.loc;
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this.state.current.addDependency(dep);
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return true;
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});
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compiler.parser.plugin("typeof " + key, function(expr) {
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var dep = new ConstDependency(JSON.stringify(typeof value), expr.range);
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dep.loc = expr.loc;
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this.state.current.addDependency(dep);
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return true;
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});
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});
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};
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