/*
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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 getPaths = require("./getPaths");
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const forEachBail = require("./forEachBail");
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module.exports = class SymlinkPlugin {
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constructor(source, target) {
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this.source = source;
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this.target = target;
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}
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apply(resolver) {
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const target = resolver.ensureHook(this.target);
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const fs = resolver.fileSystem;
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resolver
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.getHook(this.source)
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.tapAsync("SymlinkPlugin", (request, resolveContext, callback) => {
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const pathsResult = getPaths(request.path);
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const pathSeqments = pathsResult.seqments;
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const paths = pathsResult.paths;
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let containsSymlink = false;
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forEachBail.withIndex(
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paths,
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(path, idx, callback) => {
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fs.readlink(path, (err, result) => {
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if (!err && result) {
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pathSeqments[idx] = result;
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containsSymlink = true;
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// Shortcut when absolute symlink found
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if (/^(\/|[a-zA-Z]:($|\\))/.test(result))
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return callback(null, idx);
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}
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callback();
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});
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},
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(err, idx) => {
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if (!containsSymlink) return callback();
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const resultSeqments =
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typeof idx === "number"
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? pathSeqments.slice(0, idx + 1)
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: pathSeqments.slice();
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const result = resultSeqments.reverse().reduce((a, b) => {
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return resolver.join(a, b);
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});
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const obj = Object.assign({}, request, {
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path: result
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});
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resolver.doResolve(
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target,
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obj,
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"resolved symlink to " + result,
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resolveContext,
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callback
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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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