| 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 | /** @typedef {import("./Resolver")} Resolver */
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| 9 | /** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
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| 10 |
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| 11 | module.exports = class FileExistsPlugin {
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| 12 | /**
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| 13 | * @param {string | ResolveStepHook} source source
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| 14 | * @param {string | ResolveStepHook} target target
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| 15 | */
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| 16 | constructor(source, target) {
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| 17 | this.source = source;
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| 18 | this.target = target;
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| 19 | }
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| 20 |
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| 21 | /**
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| 22 | * @param {Resolver} resolver the resolver
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| 23 | * @returns {void}
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| 24 | */
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| 25 | apply(resolver) {
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| 26 | const target = resolver.ensureHook(this.target);
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| 27 | const fs = resolver.fileSystem;
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| 28 | resolver
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| 29 | .getHook(this.source)
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| 30 | .tapAsync("FileExistsPlugin", (request, resolveContext, callback) => {
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| 31 | const file = request.path;
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| 32 | if (!file) return callback();
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| 33 | fs.stat(file, (err, stat) => {
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| 34 | if (err || !stat) {
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| 35 | if (resolveContext.missingDependencies)
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| 36 | resolveContext.missingDependencies.add(file);
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| 37 | if (resolveContext.log) resolveContext.log(file + " doesn't exist");
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| 38 | return callback();
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| 39 | }
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| 40 | if (!stat.isFile()) {
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| 41 | if (resolveContext.missingDependencies)
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| 42 | resolveContext.missingDependencies.add(file);
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| 43 | if (resolveContext.log) resolveContext.log(file + " is not a file");
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| 44 | return callback();
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| 45 | }
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| 46 | if (resolveContext.fileDependencies)
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| 47 | resolveContext.fileDependencies.add(file);
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| 48 | resolver.doResolve(
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| 49 | target,
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| 50 | request,
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| 51 | "existing file: " + file,
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| 52 | resolveContext,
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| 53 | callback
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| 54 | );
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| 55 | });
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| 56 | });
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| 57 | }
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| 58 | };
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