source: trip-planner-front/node_modules/enhanced-resolve/lib/SymlinkPlugin.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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File size: 2.2 KB
Line 
1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const forEachBail = require("./forEachBail");
9const getPaths = require("./getPaths");
10const { getType, PathType } = require("./util/path");
11
12/** @typedef {import("./Resolver")} Resolver */
13/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
14
15module.exports = class SymlinkPlugin {
16 /**
17 * @param {string | ResolveStepHook} source source
18 * @param {string | ResolveStepHook} target target
19 */
20 constructor(source, target) {
21 this.source = source;
22 this.target = target;
23 }
24
25 /**
26 * @param {Resolver} resolver the resolver
27 * @returns {void}
28 */
29 apply(resolver) {
30 const target = resolver.ensureHook(this.target);
31 const fs = resolver.fileSystem;
32 resolver
33 .getHook(this.source)
34 .tapAsync("SymlinkPlugin", (request, resolveContext, callback) => {
35 if (request.ignoreSymlinks) return callback();
36 const pathsResult = getPaths(request.path);
37 const pathSeqments = pathsResult.seqments;
38 const paths = pathsResult.paths;
39
40 let containsSymlink = false;
41 let idx = -1;
42 forEachBail(
43 paths,
44 (path, callback) => {
45 idx++;
46 if (resolveContext.fileDependencies)
47 resolveContext.fileDependencies.add(path);
48 fs.readlink(path, (err, result) => {
49 if (!err && result) {
50 pathSeqments[idx] = result;
51 containsSymlink = true;
52 // Shortcut when absolute symlink found
53 const resultType = getType(result.toString());
54 if (
55 resultType === PathType.AbsoluteWin ||
56 resultType === PathType.AbsolutePosix
57 ) {
58 return callback(null, idx);
59 }
60 }
61 callback();
62 });
63 },
64 (err, idx) => {
65 if (!containsSymlink) return callback();
66 const resultSeqments =
67 typeof idx === "number"
68 ? pathSeqments.slice(0, idx + 1)
69 : pathSeqments.slice();
70 const result = resultSeqments.reduceRight((a, b) => {
71 return resolver.join(a, b);
72 });
73 const obj = {
74 ...request,
75 path: result
76 };
77 resolver.doResolve(
78 target,
79 obj,
80 "resolved symlink to " + result,
81 resolveContext,
82 callback
83 );
84 }
85 );
86 });
87 }
88};
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