chushihua

node_modules/webpack/lib/OptionsDefaulter.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+function getProperty(obj, name) {
+	name = name.split(".");
+	for(let i = 0; i < name.length - 1; i++) {
+		obj = obj[name[i]];
+		if(typeof obj !== "object" || !obj) return;
+	}
+	return obj[name.pop()];
+}
+
+function setProperty(obj, name, value) {
+	name = name.split(".");
+	for(let i = 0; i < name.length - 1; i++) {
+		if(typeof obj[name[i]] !== "object" && typeof obj[name[i]] !== "undefined") return;
+		if(!obj[name[i]]) obj[name[i]] = {};
+		obj = obj[name[i]];
+	}
+	obj[name.pop()] = value;
+}
+
+class OptionsDefaulter {
+	constructor() {
+		this.defaults = {};
+		this.config = {};
+	}
+
+	process(options) {
+		// TODO: change this for webpack 4: options = Object.assign({}, options);
+		for(let name in this.defaults) {
+			switch(this.config[name]) {
+				case undefined:
+					if(getProperty(options, name) === undefined)
+						setProperty(options, name, this.defaults[name]);
+					break;
+				case "call":
+					setProperty(options, name, this.defaults[name].call(this, getProperty(options, name), options), options);
+					break;
+				case "make":
+					if(getProperty(options, name) === undefined)
+						setProperty(options, name, this.defaults[name].call(this, options), options);
+					break;
+				case "append":
+					{
+						let oldValue = getProperty(options, name);
+						if(!Array.isArray(oldValue)) oldValue = [];
+						oldValue.push.apply(oldValue, this.defaults[name]);
+						setProperty(options, name, oldValue);
+						break;
+					}
+				default:
+					throw new Error("OptionsDefaulter cannot process " + this.config[name]);
+			}
+		}
+		// TODO: change this for webpack 4: return options;
+	}
+
+	set(name, config, def) {
+		if(arguments.length === 3) {
+			this.defaults[name] = def;
+			this.config[name] = config;
+		} else {
+			this.defaults[name] = config;
+			delete this.config[name];
+		}
+	}
+}
+
+module.exports = OptionsDefaulter;