mirror of https://github.com/webpack/webpack.git
61 lines
2.1 KiB
JavaScript
61 lines
2.1 KiB
JavaScript
/*
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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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"use strict";
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const ParserHelpers = require("./ParserHelpers");
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const ConstDependency = require("./dependencies/ConstDependency");
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const NullFactory = require("./NullFactory");
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class ProvidePlugin {
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constructor(definitions) {
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this.definitions = definitions;
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}
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apply(compiler) {
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const definitions = this.definitions;
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compiler.hooks.compilation.tap("ProvidePlugin", (compilation, {
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normalModuleFactory
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}) => {
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compilation.dependencyFactories.set(ConstDependency, new NullFactory());
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compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
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const handler = (parser, parserOptions) => {
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Object.keys(definitions).forEach(name => {
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var request = [].concat(definitions[name]);
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var splittedName = name.split(".");
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if(splittedName.length > 0) {
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splittedName.slice(1).forEach((_, i) => {
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const name = splittedName.slice(0, i + 1).join(".");
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parser.hooks.canRename.for(name).tap("ProvidePlugin", ParserHelpers.approve);
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});
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}
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parser.hooks.expression.for(name).tap("ProvidePlugin", expr => {
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let nameIdentifier = name;
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const scopedName = name.includes(".");
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let expression = `require(${JSON.stringify(request[0])})`;
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if(scopedName) {
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nameIdentifier = `__webpack_provided_${name.replace(/\./g, "_dot_")}`;
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}
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if(request.length > 1) {
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expression += request.slice(1).map(r => `[${JSON.stringify(r)}]`).join("");
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}
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if(!ParserHelpers.addParsedVariableToModule(parser, nameIdentifier, expression)) {
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return false;
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}
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if(scopedName) {
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ParserHelpers.toConstantDependency(parser, nameIdentifier)(expr);
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}
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return true;
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});
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});
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};
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normalModuleFactory.hooks.parser.for("javascript/auto").tap("ProvidePlugin", handler);
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normalModuleFactory.hooks.parser.for("javascript/dynamic").tap("ProvidePlugin", handler);
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normalModuleFactory.hooks.parser.for("javascript/esm").tap("ProvidePlugin", handler);
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});
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}
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}
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module.exports = ProvidePlugin;
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