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keksAccountGUI/node_modulesOLD/enhanced-resolve/lib/AliasFieldPlugin.js
2019-08-11 20:48:02 +02:00

52 lines
1.9 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");
module.exports = class AliasFieldPlugin {
constructor(source, field, target) {
this.source = source;
this.field = field;
this.target = target;
}
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(typeof fieldData !== "object") {
if(resolveContext.log) resolveContext.log("Field '" + this.field + "' doesn't contain a valid alias configuration");
return callback();
}
const data1 = fieldData[innerRequest];
const data2 = fieldData[innerRequest.replace(/^\.\//, "")];
const data = typeof data1 !== "undefined" ? data1 : data2;
if(data === innerRequest) return callback();
if(data === undefined) return callback();
if(data === false) {
const ignoreObj = Object.assign({}, request, {
path: false
});
return callback(null, ignoreObj);
}
const obj = Object.assign({}, request, {
path: request.descriptionFileRoot,
request: data
});
resolver.doResolve(target, obj, "aliased from description file " + request.descriptionFilePath + " with mapping '" + innerRequest + "' to '" + 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);
});
});
}
};