| /* |
| MIT License http://www.opensource.org/licenses/mit-license.php |
| Author Tobias Koppers @sokra |
| */ |
| "use strict"; |
| |
| const concord = require("./concord"); |
| const DescriptionFileUtils = require("./DescriptionFileUtils"); |
| const getInnerRequest = require("./getInnerRequest"); |
| |
| module.exports = class ConcordModulesPlugin { |
| constructor(source, options, target) { |
| this.source = source; |
| this.options = options; |
| this.target = target; |
| } |
| |
| apply(resolver) { |
| const target = resolver.ensureHook(this.target); |
| resolver |
| .getHook(this.source) |
| .tapAsync("ConcordModulesPlugin", (request, resolveContext, callback) => { |
| const innerRequest = getInnerRequest(resolver, request); |
| if (!innerRequest) return callback(); |
| const concordField = DescriptionFileUtils.getField( |
| request.descriptionFileData, |
| "concord" |
| ); |
| if (!concordField) return callback(); |
| const data = concord.matchModule( |
| request.context, |
| concordField, |
| innerRequest |
| ); |
| 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); |
| } |
| ); |
| }); |
| } |
| }; |