104 lines
3.0 KiB
JavaScript
104 lines
3.0 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const DescriptionFileUtils = require("./DescriptionFileUtils");
|
|
const getInnerRequest = require("./getInnerRequest");
|
|
|
|
/** @typedef {import("./Resolver")} Resolver */
|
|
/** @typedef {import("./Resolver").JsonPrimitive} JsonPrimitive */
|
|
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
|
|
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
|
|
|
|
module.exports = class AliasFieldPlugin {
|
|
/**
|
|
* @param {string | ResolveStepHook} source source
|
|
* @param {string | Array<string>} field field
|
|
* @param {string | ResolveStepHook} target target
|
|
*/
|
|
constructor(source, field, target) {
|
|
this.source = source;
|
|
this.field = field;
|
|
this.target = target;
|
|
}
|
|
|
|
/**
|
|
* @param {Resolver} resolver the resolver
|
|
* @returns {void}
|
|
*/
|
|
apply(resolver) {
|
|
const target = resolver.ensureHook(this.target);
|
|
resolver
|
|
.getHook(this.source)
|
|
.tapAsync("AliasFieldPlugin", (request, resolveContext, callback) => {
|
|
if (!request.descriptionFileData) return callback();
|
|
const innerRequest = getInnerRequest(resolver, request);
|
|
if (!innerRequest) return callback();
|
|
const fieldData = DescriptionFileUtils.getField(
|
|
request.descriptionFileData,
|
|
this.field,
|
|
);
|
|
if (fieldData === null || typeof fieldData !== "object") {
|
|
if (resolveContext.log) {
|
|
resolveContext.log(
|
|
`Field '${this.field}' doesn't contain a valid alias configuration`,
|
|
);
|
|
}
|
|
return callback();
|
|
}
|
|
/** @type {JsonPrimitive | undefined} */
|
|
const data = Object.prototype.hasOwnProperty.call(
|
|
fieldData,
|
|
innerRequest,
|
|
)
|
|
? /** @type {{[Key in string]: JsonPrimitive}} */ (fieldData)[
|
|
innerRequest
|
|
]
|
|
: innerRequest.startsWith("./")
|
|
? /** @type {{[Key in string]: JsonPrimitive}} */ (fieldData)[
|
|
innerRequest.slice(2)
|
|
]
|
|
: undefined;
|
|
if (data === innerRequest) return callback();
|
|
if (data === undefined) return callback();
|
|
if (data === false) {
|
|
/** @type {ResolveRequest} */
|
|
const ignoreObj = {
|
|
...request,
|
|
path: false,
|
|
};
|
|
if (typeof resolveContext.yield === "function") {
|
|
resolveContext.yield(ignoreObj);
|
|
return callback(null, null);
|
|
}
|
|
return callback(null, ignoreObj);
|
|
}
|
|
/** @type {ResolveRequest} */
|
|
const obj = {
|
|
...request,
|
|
path: /** @type {string} */ (request.descriptionFileRoot),
|
|
request: /** @type {string} */ (data),
|
|
fullySpecified: false,
|
|
};
|
|
resolver.doResolve(
|
|
target,
|
|
obj,
|
|
`aliased from description file ${
|
|
request.descriptionFilePath
|
|
} with mapping '${innerRequest}' to '${/** @type {string} */ data}'`,
|
|
resolveContext,
|
|
(err, result) => {
|
|
if (err) return callback(err);
|
|
|
|
// Don't allow other aliasing or raw request
|
|
if (result === undefined) return callback(null, null);
|
|
callback(null, result);
|
|
},
|
|
);
|
|
});
|
|
}
|
|
};
|