| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const { cachedSetProperty } = require("../util/cleverMerge");
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| 9 | const ContextElementDependency = require("./ContextElementDependency");
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| 10 | const RequireContextDependency = require("./RequireContextDependency");
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| 11 | const RequireContextDependencyParserPlugin = require("./RequireContextDependencyParserPlugin");
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| 12 |
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| 13 | /** @typedef {import("../../declarations/WebpackOptions").ResolveOptions} ResolveOptions */
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| 14 | /** @typedef {import("../Compiler")} Compiler */
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| 15 |
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| 16 | /** @type {ResolveOptions} */
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| 17 | const EMPTY_RESOLVE_OPTIONS = {};
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| 18 |
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| 19 | class RequireContextPlugin {
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| 20 | /**
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| 21 | * Apply the plugin
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| 22 | * @param {Compiler} compiler the compiler instance
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| 23 | * @returns {void}
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| 24 | */
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| 25 | apply(compiler) {
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| 26 | compiler.hooks.compilation.tap(
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| 27 | "RequireContextPlugin",
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| 28 | (compilation, { contextModuleFactory, normalModuleFactory }) => {
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| 29 | compilation.dependencyFactories.set(
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| 30 | RequireContextDependency,
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| 31 | contextModuleFactory
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| 32 | );
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| 33 | compilation.dependencyTemplates.set(
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| 34 | RequireContextDependency,
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| 35 | new RequireContextDependency.Template()
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| 36 | );
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| 37 |
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| 38 | compilation.dependencyFactories.set(
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| 39 | ContextElementDependency,
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| 40 | normalModuleFactory
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| 41 | );
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| 42 |
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| 43 | const handler = (parser, parserOptions) => {
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| 44 | if (
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| 45 | parserOptions.requireContext !== undefined &&
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| 46 | !parserOptions.requireContext
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| 47 | )
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| 48 | return;
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| 49 |
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| 50 | new RequireContextDependencyParserPlugin().apply(parser);
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| 51 | };
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| 52 |
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| 53 | normalModuleFactory.hooks.parser
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| 54 | .for("javascript/auto")
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| 55 | .tap("RequireContextPlugin", handler);
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| 56 | normalModuleFactory.hooks.parser
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| 57 | .for("javascript/dynamic")
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| 58 | .tap("RequireContextPlugin", handler);
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| 59 |
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| 60 | contextModuleFactory.hooks.alternativeRequests.tap(
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| 61 | "RequireContextPlugin",
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| 62 | (items, options) => {
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| 63 | if (items.length === 0) return items;
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| 64 |
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| 65 | const finalResolveOptions = compiler.resolverFactory.get(
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| 66 | "normal",
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| 67 | cachedSetProperty(
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| 68 | options.resolveOptions || EMPTY_RESOLVE_OPTIONS,
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| 69 | "dependencyType",
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| 70 | options.category
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| 71 | )
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| 72 | ).options;
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| 73 |
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| 74 | let newItems;
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| 75 | if (!finalResolveOptions.fullySpecified) {
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| 76 | newItems = [];
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| 77 | for (const item of items) {
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| 78 | const { request, context } = item;
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| 79 | for (const ext of finalResolveOptions.extensions) {
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| 80 | if (request.endsWith(ext)) {
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| 81 | newItems.push({
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| 82 | context,
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| 83 | request: request.slice(0, -ext.length)
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| 84 | });
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| 85 | }
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| 86 | }
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| 87 | if (!finalResolveOptions.enforceExtension) {
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| 88 | newItems.push(item);
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| 89 | }
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| 90 | }
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| 91 | items = newItems;
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| 92 |
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| 93 | newItems = [];
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| 94 | for (const obj of items) {
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| 95 | const { request, context } = obj;
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| 96 | for (const mainFile of finalResolveOptions.mainFiles) {
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| 97 | if (request.endsWith(`/${mainFile}`)) {
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| 98 | newItems.push({
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| 99 | context,
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| 100 | request: request.slice(0, -mainFile.length)
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| 101 | });
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| 102 | newItems.push({
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| 103 | context,
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| 104 | request: request.slice(0, -mainFile.length - 1)
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| 105 | });
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| 106 | }
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| 107 | }
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| 108 | newItems.push(obj);
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| 109 | }
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| 110 | items = newItems;
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| 111 | }
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| 112 |
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| 113 | newItems = [];
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| 114 | for (const item of items) {
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| 115 | let hideOriginal = false;
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| 116 | for (const modulesItems of finalResolveOptions.modules) {
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| 117 | if (Array.isArray(modulesItems)) {
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| 118 | for (const dir of modulesItems) {
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| 119 | if (item.request.startsWith(`./${dir}/`)) {
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| 120 | newItems.push({
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| 121 | context: item.context,
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| 122 | request: item.request.slice(dir.length + 3)
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| 123 | });
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| 124 | hideOriginal = true;
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| 125 | }
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| 126 | }
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| 127 | } else {
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| 128 | const dir = modulesItems.replace(/\\/g, "/");
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| 129 | const fullPath =
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| 130 | item.context.replace(/\\/g, "/") + item.request.slice(1);
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| 131 | if (fullPath.startsWith(dir)) {
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| 132 | newItems.push({
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| 133 | context: item.context,
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| 134 | request: fullPath.slice(dir.length + 1)
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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 | if (!hideOriginal) {
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| 140 | newItems.push(item);
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| 141 | }
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| 142 | }
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| 143 | return newItems;
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| 144 | }
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| 145 | );
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| 146 | }
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| 147 | );
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| 148 | }
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| 149 | }
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| 150 | module.exports = RequireContextPlugin;
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