66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
/*
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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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/** @typedef {import("./Resolver")} Resolver */
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/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
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module.exports = class FileExistsPlugin {
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/**
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* @param {string | ResolveStepHook} source source
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* @param {string | ResolveStepHook} target target
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*/
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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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/**
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* @param {Resolver} resolver the resolver
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* @returns {void}
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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("FileExistsPlugin", (request, resolveContext, callback) => {
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const file = request.path;
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if (!file) return callback();
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fs.stat(file, (err, stat) => {
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// Combine the two miss branches: a stat failure and a
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// "not a file" result share the same handling — record the
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// path on `missingDependencies`, log the right reason, then
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// bail. The error-message ternary picks the wording that
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// matched the failing condition.
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if (err || !stat || !stat.isFile()) {
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if (resolveContext.missingDependencies) {
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resolveContext.missingDependencies.add(file);
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}
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if (resolveContext.log) {
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resolveContext.log(
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err || !stat
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? `${file} doesn't exist`
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: `${file} is not a file`,
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);
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}
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return callback();
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}
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if (resolveContext.fileDependencies) {
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resolveContext.fileDependencies.add(file);
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}
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resolver.doResolve(
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target,
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request,
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`existing file: ${file}`,
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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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