File size: 1,764 Bytes
acee10a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | /*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
module.exports = class FileExistsPlugin {
/**
* @param {string | ResolveStepHook} source source
* @param {string | ResolveStepHook} target target
*/
constructor(source, target) {
this.source = source;
this.target = target;
}
/**
* @param {Resolver} resolver the resolver
* @returns {void}
*/
apply(resolver) {
const target = resolver.ensureHook(this.target);
const fs = resolver.fileSystem;
resolver
.getHook(this.source)
.tapAsync("FileExistsPlugin", (request, resolveContext, callback) => {
const file = request.path;
if (!file) return callback();
fs.stat(file, (err, stat) => {
// Combine the two miss branches: a stat failure and a
// "not a file" result share the same handling — record the
// path on `missingDependencies`, log the right reason, then
// bail. The error-message ternary picks the wording that
// matched the failing condition.
if (err || !stat || !stat.isFile()) {
if (resolveContext.missingDependencies) {
resolveContext.missingDependencies.add(file);
}
if (resolveContext.log) {
resolveContext.log(
err || !stat
? `${file} doesn't exist`
: `${file} is not a file`,
);
}
return callback();
}
if (resolveContext.fileDependencies) {
resolveContext.fileDependencies.add(file);
}
resolver.doResolve(
target,
request,
`existing file: ${file}`,
resolveContext,
callback,
);
});
});
}
};
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