source: imaps-frontend/node_modules/enhanced-resolve/lib/ImportsFieldPlugin.js

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Last change on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 3 days ago

F4 Finalna Verzija
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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Ivan Kopeykin @vankop
4*/
5
6"use strict";
7
8const DescriptionFileUtils = require("./DescriptionFileUtils");
9const forEachBail = require("./forEachBail");
10const { processImportsField } = require("./util/entrypoints");
11const { parseIdentifier } = require("./util/identifier");
12const {
13 invalidSegmentRegEx,
14 deprecatedInvalidSegmentRegEx
15} = require("./util/path");
16
17/** @typedef {import("./Resolver")} Resolver */
18/** @typedef {import("./Resolver").JsonObject} JsonObject */
19/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
20/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
21/** @typedef {import("./util/entrypoints").FieldProcessor} FieldProcessor */
22/** @typedef {import("./util/entrypoints").ImportsField} ImportsField */
23
24const dotCode = ".".charCodeAt(0);
25
26module.exports = class ImportsFieldPlugin {
27 /**
28 * @param {string | ResolveStepHook} source source
29 * @param {Set<string>} conditionNames condition names
30 * @param {string | string[]} fieldNamePath name path
31 * @param {string | ResolveStepHook} targetFile target file
32 * @param {string | ResolveStepHook} targetPackage target package
33 */
34 constructor(
35 source,
36 conditionNames,
37 fieldNamePath,
38 targetFile,
39 targetPackage
40 ) {
41 this.source = source;
42 this.targetFile = targetFile;
43 this.targetPackage = targetPackage;
44 this.conditionNames = conditionNames;
45 this.fieldName = fieldNamePath;
46 /** @type {WeakMap<JsonObject, FieldProcessor>} */
47 this.fieldProcessorCache = new WeakMap();
48 }
49
50 /**
51 * @param {Resolver} resolver the resolver
52 * @returns {void}
53 */
54 apply(resolver) {
55 const targetFile = resolver.ensureHook(this.targetFile);
56 const targetPackage = resolver.ensureHook(this.targetPackage);
57
58 resolver
59 .getHook(this.source)
60 .tapAsync("ImportsFieldPlugin", (request, resolveContext, callback) => {
61 // When there is no description file, abort
62 if (!request.descriptionFilePath || request.request === undefined) {
63 return callback();
64 }
65
66 const remainingRequest =
67 request.request + request.query + request.fragment;
68 const importsField =
69 /** @type {ImportsField|null|undefined} */
70 (
71 DescriptionFileUtils.getField(
72 /** @type {JsonObject} */ (request.descriptionFileData),
73 this.fieldName
74 )
75 );
76 if (!importsField) return callback();
77
78 if (request.directory) {
79 return callback(
80 new Error(
81 `Resolving to directories is not possible with the imports field (request was ${remainingRequest}/)`
82 )
83 );
84 }
85
86 /** @type {string[]} */
87 let paths;
88 /** @type {string | null} */
89 let usedField;
90
91 try {
92 // We attach the cache to the description file instead of the importsField value
93 // because we use a WeakMap and the importsField could be a string too.
94 // Description file is always an object when exports field can be accessed.
95 let fieldProcessor = this.fieldProcessorCache.get(
96 /** @type {JsonObject} */ (request.descriptionFileData)
97 );
98 if (fieldProcessor === undefined) {
99 fieldProcessor = processImportsField(importsField);
100 this.fieldProcessorCache.set(
101 /** @type {JsonObject} */ (request.descriptionFileData),
102 fieldProcessor
103 );
104 }
105 [paths, usedField] = fieldProcessor(
106 remainingRequest,
107 this.conditionNames
108 );
109 } catch (/** @type {unknown} */ err) {
110 if (resolveContext.log) {
111 resolveContext.log(
112 `Imports field in ${request.descriptionFilePath} can't be processed: ${err}`
113 );
114 }
115 return callback(/** @type {Error} */ (err));
116 }
117
118 if (paths.length === 0) {
119 return callback(
120 new Error(
121 `Package import ${remainingRequest} is not imported from package ${request.descriptionFileRoot} (see imports field in ${request.descriptionFilePath})`
122 )
123 );
124 }
125
126 forEachBail(
127 paths,
128 /**
129 * @param {string} p path
130 * @param {(err?: null|Error, result?: null|ResolveRequest) => void} callback callback
131 * @param {number} i index
132 * @returns {void}
133 */
134 (p, callback, i) => {
135 const parsedIdentifier = parseIdentifier(p);
136
137 if (!parsedIdentifier) return callback();
138
139 const [path_, query, fragment] = parsedIdentifier;
140
141 switch (path_.charCodeAt(0)) {
142 // should be relative
143 case dotCode: {
144 if (
145 invalidSegmentRegEx.exec(path_.slice(2)) !== null &&
146 deprecatedInvalidSegmentRegEx.test(path_.slice(2)) !== null
147 ) {
148 if (paths.length === i) {
149 return callback(
150 new Error(
151 `Invalid "imports" target "${p}" defined for "${usedField}" in the package config ${request.descriptionFilePath}, targets must start with "./"`
152 )
153 );
154 }
155
156 return callback();
157 }
158
159 /** @type {ResolveRequest} */
160 const obj = {
161 ...request,
162 request: undefined,
163 path: resolver.join(
164 /** @type {string} */ (request.descriptionFileRoot),
165 path_
166 ),
167 relativePath: path_,
168 query,
169 fragment
170 };
171
172 resolver.doResolve(
173 targetFile,
174 obj,
175 "using imports field: " + p,
176 resolveContext,
177 (err, result) => {
178 if (err) return callback(err);
179 // Don't allow to continue - https://github.com/webpack/enhanced-resolve/issues/400
180 if (result === undefined) return callback(null, null);
181 callback(null, result);
182 }
183 );
184 break;
185 }
186
187 // package resolving
188 default: {
189 /** @type {ResolveRequest} */
190 const obj = {
191 ...request,
192 request: path_,
193 relativePath: path_,
194 fullySpecified: true,
195 query,
196 fragment
197 };
198
199 resolver.doResolve(
200 targetPackage,
201 obj,
202 "using imports field: " + p,
203 resolveContext,
204 (err, result) => {
205 if (err) return callback(err);
206 // Don't allow to continue - https://github.com/webpack/enhanced-resolve/issues/400
207 if (result === undefined) return callback(null, null);
208 callback(null, result);
209 }
210 );
211 }
212 }
213 },
214 /**
215 * @param {null|Error} [err] error
216 * @param {null|ResolveRequest} [result] result
217 * @returns {void}
218 */
219 (err, result) => callback(err, result || null)
220 );
221 });
222 }
223};
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