chushihua

node_modules/enhanced-resolve/lib/DescriptionFilePlugin.js

@@ -0,0 +1,51 @@
+"use strict";
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+const createInnerCallback = require("./createInnerCallback");
+const DescriptionFileUtils = require("./DescriptionFileUtils");
+
+class DescriptionFilePlugin {
+	constructor(source, filenames, target) {
+		this.source = source;
+		this.filenames = [].concat(filenames);
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const filenames = this.filenames;
+		const target = this.target;
+		resolver.plugin(this.source, (request, callback) => {
+			const directory = request.path;
+			DescriptionFileUtils.loadDescriptionFile(resolver, directory, filenames, ((err, result) => {
+				if(err) return callback(err);
+				if(!result) {
+					if(callback.missing) {
+						filenames.forEach((filename) => {
+							callback.missing.push(resolver.join(directory, filename));
+						});
+					}
+					if(callback.log) callback.log("No description file found");
+					return callback();
+				}
+				const relativePath = "." + request.path.substr(result.directory.length).replace(/\\/g, "/");
+				const obj = Object.assign({}, request, {
+					descriptionFilePath: result.path,
+					descriptionFileData: result.content,
+					descriptionFileRoot: result.directory,
+					relativePath: relativePath
+				});
+				resolver.doResolve(target, obj, "using description file: " + result.path + " (relative path: " + relativePath + ")", createInnerCallback((err, result) => {
+					if(err) return callback(err);
+					if(result) return callback(null, result);
+
+					// Don't allow other description files or none at all
+					callback(null, null);
+				}, callback));
+			}));
+		});
+	}
+}
+
+module.exports = DescriptionFilePlugin;