/*
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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 RequireContextDependency = require("./RequireContextDependency");
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const ContextElementDependency = require("./ContextElementDependency");
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const RequireContextDependencyParserPlugin = require("./RequireContextDependencyParserPlugin");
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class RequireContextPlugin {
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constructor(modulesDirectories, extensions, mainFiles) {
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if (!Array.isArray(modulesDirectories)) {
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throw new Error("modulesDirectories must be an array");
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}
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if (!Array.isArray(extensions)) {
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throw new Error("extensions must be an array");
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}
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this.modulesDirectories = modulesDirectories;
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this.extensions = extensions;
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this.mainFiles = mainFiles;
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}
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apply(compiler) {
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compiler.hooks.compilation.tap(
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"RequireContextPlugin",
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(compilation, { contextModuleFactory, normalModuleFactory }) => {
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compilation.dependencyFactories.set(
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RequireContextDependency,
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contextModuleFactory
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);
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compilation.dependencyTemplates.set(
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RequireContextDependency,
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new RequireContextDependency.Template()
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);
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compilation.dependencyFactories.set(
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ContextElementDependency,
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normalModuleFactory
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);
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const handler = (parser, parserOptions) => {
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if (
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parserOptions.requireContext !== undefined &&
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!parserOptions.requireContext
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)
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return;
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new RequireContextDependencyParserPlugin().apply(parser);
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};
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("RequireContextPlugin", handler);
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normalModuleFactory.hooks.parser
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.for("javascript/dynamic")
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.tap("RequireContextPlugin", handler);
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contextModuleFactory.hooks.alternatives.tap(
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"RequireContextPlugin",
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items => {
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if (items.length === 0) return items;
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return items
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.map(obj => {
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return this.extensions
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.filter(ext => {
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const l = obj.request.length;
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return (
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l > ext.length &&
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obj.request.substr(l - ext.length, l) === ext
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);
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})
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.map(ext => {
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const l = obj.request.length;
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return {
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context: obj.context,
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request: obj.request.substr(0, l - ext.length)
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};
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})
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.concat(obj);
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})
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.reduce((a, b) => a.concat(b), []);
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}
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);
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contextModuleFactory.hooks.alternatives.tap(
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"RequireContextPlugin",
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items => {
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if (items.length === 0) return items;
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return items
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.map(obj => {
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return this.mainFiles
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.filter(mainFile => {
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const l = obj.request.length;
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return (
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l > mainFile.length + 1 &&
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obj.request.substr(l - mainFile.length - 1, l) ===
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"/" + mainFile
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);
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})
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.map(mainFile => {
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const l = obj.request.length;
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return [
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{
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context: obj.context,
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request: obj.request.substr(0, l - mainFile.length)
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},
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{
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context: obj.context,
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request: obj.request.substr(0, l - mainFile.length - 1)
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}
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];
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})
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.reduce((a, b) => a.concat(b), [])
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.concat(obj);
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})
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.reduce((a, b) => a.concat(b), []);
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}
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);
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contextModuleFactory.hooks.alternatives.tap(
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"RequireContextPlugin",
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items => {
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if (items.length === 0) return items;
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return items.map(obj => {
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for (let i = 0; i < this.modulesDirectories.length; i++) {
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const dir = this.modulesDirectories[i];
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const idx = obj.request.indexOf("./" + dir + "/");
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if (idx === 0) {
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obj.request = obj.request.slice(dir.length + 3);
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break;
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}
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}
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return obj;
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});
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}
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);
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}
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);
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}
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}
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module.exports = RequireContextPlugin;
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