mirror of https://github.com/webpack/webpack.git
82 lines
2.3 KiB
JavaScript
82 lines
2.3 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 ConstDependency = require("./dependencies/ConstDependency");
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const {
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addParsedVariableToModule,
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approve,
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toConstantDependency
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} = require("./JavascriptParserHelpers");
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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(
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"ProvidePlugin",
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(compilation, { normalModuleFactory }) => {
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compilation.dependencyFactories.set(ConstDependency, new NullFactory());
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compilation.dependencyTemplates.set(
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ConstDependency,
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new ConstDependency.Template()
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);
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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", 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(
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/\./g,
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"_dot_"
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)}`;
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}
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if (request.length > 1) {
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expression += request
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.slice(1)
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.map(r => `[${JSON.stringify(r)}]`)
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.join("");
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}
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if (
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!addParsedVariableToModule(parser, nameIdentifier, expression)
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) {
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return false;
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}
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if (scopedName) {
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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
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.for("javascript/auto")
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.tap("ProvidePlugin", handler);
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normalModuleFactory.hooks.parser
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.for("javascript/dynamic")
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.tap("ProvidePlugin", handler);
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normalModuleFactory.hooks.parser
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.for("javascript/esm")
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.tap("ProvidePlugin", handler);
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}
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);
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}
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}
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module.exports = ProvidePlugin;
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