91 lines
2.4 KiB
JavaScript
91 lines
2.4 KiB
JavaScript
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
Author Tobias Koppers @sokra
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const path = require("path");
|
||
|
|
const DescriptionFileUtils = require("./DescriptionFileUtils");
|
||
|
|
|
||
|
|
/** @typedef {import("./Resolver")} Resolver */
|
||
|
|
/** @typedef {import("./Resolver").JsonObject} JsonObject */
|
||
|
|
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
|
||
|
|
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
|
||
|
|
|
||
|
|
/** @typedef {{name: string|Array<string>, forceRelative: boolean}} MainFieldOptions */
|
||
|
|
|
||
|
|
const alreadyTriedMainField = Symbol("alreadyTriedMainField");
|
||
|
|
|
||
|
|
module.exports = class MainFieldPlugin {
|
||
|
|
/**
|
||
|
|
* @param {string | ResolveStepHook} source source
|
||
|
|
* @param {MainFieldOptions} options options
|
||
|
|
* @param {string | ResolveStepHook} target target
|
||
|
|
*/
|
||
|
|
constructor(source, options, target) {
|
||
|
|
this.source = source;
|
||
|
|
this.options = options;
|
||
|
|
this.target = target;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {Resolver} resolver the resolver
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
apply(resolver) {
|
||
|
|
const target = resolver.ensureHook(this.target);
|
||
|
|
resolver
|
||
|
|
.getHook(this.source)
|
||
|
|
.tapAsync("MainFieldPlugin", (request, resolveContext, callback) => {
|
||
|
|
if (
|
||
|
|
request.path !== request.descriptionFileRoot ||
|
||
|
|
/** @type {ResolveRequest & { [alreadyTriedMainField]?: string }} */
|
||
|
|
(request)[alreadyTriedMainField] === request.descriptionFilePath ||
|
||
|
|
!request.descriptionFilePath
|
||
|
|
)
|
||
|
|
return callback();
|
||
|
|
const filename = path.basename(request.descriptionFilePath);
|
||
|
|
let mainModule =
|
||
|
|
/** @type {string|null|undefined} */
|
||
|
|
(
|
||
|
|
DescriptionFileUtils.getField(
|
||
|
|
/** @type {JsonObject} */ (request.descriptionFileData),
|
||
|
|
this.options.name
|
||
|
|
)
|
||
|
|
);
|
||
|
|
|
||
|
|
if (
|
||
|
|
!mainModule ||
|
||
|
|
typeof mainModule !== "string" ||
|
||
|
|
mainModule === "." ||
|
||
|
|
mainModule === "./"
|
||
|
|
) {
|
||
|
|
return callback();
|
||
|
|
}
|
||
|
|
if (this.options.forceRelative && !/^\.\.?\//.test(mainModule))
|
||
|
|
mainModule = "./" + mainModule;
|
||
|
|
/** @type {ResolveRequest & { [alreadyTriedMainField]?: string }} */
|
||
|
|
const obj = {
|
||
|
|
...request,
|
||
|
|
request: mainModule,
|
||
|
|
module: false,
|
||
|
|
directory: mainModule.endsWith("/"),
|
||
|
|
[alreadyTriedMainField]: request.descriptionFilePath
|
||
|
|
};
|
||
|
|
return resolver.doResolve(
|
||
|
|
target,
|
||
|
|
obj,
|
||
|
|
"use " +
|
||
|
|
mainModule +
|
||
|
|
" from " +
|
||
|
|
this.options.name +
|
||
|
|
" in " +
|
||
|
|
filename,
|
||
|
|
resolveContext,
|
||
|
|
callback
|
||
|
|
);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|