vendor-extracter/webpack-fmd/FmdMainTemplate.js

var ConcatSource = require("webpack-sources").ConcatSource;
var OriginalSource = require("webpack-sources").OriginalSource;

function accessorToObjectAccess(accessor) {
	return accessor.map(function(a) {
		return "[" + JSON.stringify(a) + "]";
	}).join("");
}

function accessorAccess(base, accessor) {
	accessor = [].concat(accessor);
	return accessor.map(function(a, idx) {
		a = base + accessorToObjectAccess(accessor.slice(0, idx + 1));
		if(idx === accessor.length - 1) return a;
		return a + " = " + a + " || {}";
	}).join(", ");
}

function FmdMainTemplatePlugin(prefix, name, deps, options) {
  this.prefix = prefix
	this.name = name
  this.deps = deps
	// this.optionalAmdExternalAsGlobal = options.optionalAmdExternalAsGlobal;
	// this.namedDefine = options.namedDefine;
}
module.exports = FmdMainTemplatePlugin;

function generateFmdCode (fmdModuleName, deps) {
  const source =
    '	 else if (typeof define === \'function\' && define.fmd) {' + '\n' +
    `    define("${fmdModuleName}", [], factory)` + '\n' +
    `    define(["${fmdModuleName}"], function (vendors) {` + '\n' +
    Object.keys(deps).map(depName => {
      const ver = deps[depName]
      const name = ver ? depName + '-' + ver : depName
      return `      define("${name}", [], function () { return vendors["${depName}"] })`
    }).join('\n') + '\n' +
    '    })' + '\n' +
    '  }'
  return source
}

FmdMainTemplatePlugin.prototype.apply = function(compilation) {
	var mainTemplate = compilation.mainTemplate;
	compilation.templatesPlugin("render-with-entry", function(source, chunk, hash) {
		var externals = chunk.modules.filter(function(m) {
			return m.external;
		});
		var optionalExternals = [],
			requiredExternals = [];
		if(this.optionalAmdExternalAsGlobal) {
			externals.forEach(function(m) {
				if(m.optional) {
					optionalExternals.push(m);
				} else {
					requiredExternals.push(m);
				}
			});
			externals = requiredExternals.concat(optionalExternals);
		} else {
			requiredExternals = externals;
		}

		function replaceKeys(str) {
			return mainTemplate.applyPluginsWaterfall("asset-path", str, {
				hash: hash,
				chunk: chunk
			});
		}

		function externalsDepsArray(modules) {
			return "[" + replaceKeys(modules.map(function(m) {
				return JSON.stringify(typeof m.request === "object" ? m.request.amd : m.request);
			}).join(", ")) + "]";
		}

		function externalsRootArray(modules) {
			return replaceKeys(modules.map(function(m) {
				var request = m.request;
				if(typeof request === "object") request = request.root;
				return "root" + accessorToObjectAccess([].concat(request));
			}).join(", "));
		}

		function externalsRequireArray(type) {
			return replaceKeys(externals.map(function(m) {
				var expr;
				var request = m.request;
				if(typeof request === "object") request = request[type];
				if(Array.isArray(request)) {
					expr = "require(" + JSON.stringify(request[0]) + ")" + accessorToObjectAccess(request.slice(1));
				} else
					expr = "require(" + JSON.stringify(request) + ")";
				if(m.optional) {
					expr = "(function webpackLoadOptionalExternalModule() { try { return " + expr + "; } catch(e) {} }())";
				}
				return expr;
			}).join(", "));
		}

		function externalsArguments(modules) {
			return modules.map(function(m) {
				return "__WEBPACK_EXTERNAL_MODULE_" + m.id + "__";
			}).join(", ");
		}

		function libraryName(library) {
			return JSON.stringify(replaceKeys([].concat(library).pop()));
		}

		var amdFactory;
		if(optionalExternals.length > 0) {
			amdFactory = "function webpackLoadOptionalExternalModuleAmd(" + externalsArguments(requiredExternals) + ") {\n" +
				"			return factory(" + (
					requiredExternals.length > 0 ?
					externalsArguments(requiredExternals) + ", " + externalsRootArray(optionalExternals) :
					externalsRootArray(optionalExternals)
				) + ");\n" +
				"		}";
		} else {
			amdFactory = "factory";
		}

    var fmdModuleName = this.prefix + this.name

		return new ConcatSource(new OriginalSource(
			"(function webpackUniversalModuleDefinition(root, factory) {\n" +
      // commonjs
			"	if(typeof exports === 'object' && typeof module === 'object')\n" +
			"		module.exports = factory(" + externalsRequireArray("commonjs2") + ");\n" +
      // fmd
      generateFmdCode(fmdModuleName, this.deps) +
      // "	else if(typeof define === 'function' && define.fmd)\n" +
      // (requiredExternals.length > 0 ?
			// 	(this.name && this.namedDefine === true ?
			// 		"		define(" + libraryName(this.name) + ", " + externalsDepsArray(requiredExternals) + ", " + amdFactory + ");\n" :
			// 		"		define(" + externalsDepsArray(requiredExternals) + ", " + amdFactory + ");\n"
			// 	) :
			// 	(this.name && this.namedDefine === true ?
			// 		"		define(" + libraryName(this.name) + ", [], " + amdFactory + ");\n" :
			// 		"		define(\"" + fmdModuleName + "\", [], " + amdFactory + ");\n"
			// 	)
			// ) +
      // amd
			"	else if(typeof define === 'function' && define.amd)\n" +
			(requiredExternals.length > 0 ?
				(this.name && this.namedDefine === true ?
					"		define(" + libraryName(this.name) + ", " + externalsDepsArray(requiredExternals) + ", " + amdFactory + ");\n" :
					"		define(" + externalsDepsArray(requiredExternals) + ", " + amdFactory + ");\n"
				) :
				(this.name && this.namedDefine === true ?
					"		define(" + libraryName(this.name) + ", [], " + amdFactory + ");\n" :
					"		define([], " + amdFactory + ");\n"
				)
			) +
			(this.name ?
				"	else if(typeof exports === 'object')\n" +
				"		exports[" + libraryName(this.name) + "] = factory(" + externalsRequireArray("commonjs") + ");\n" +
				"	else\n" +
				"		" + replaceKeys(accessorAccess("root", this.name)) + " = factory(" + externalsRootArray(externals) + ");\n" :
				"	else {\n" +
				(externals.length > 0 ?
					"		var a = typeof exports === 'object' ? factory(" + externalsRequireArray("commonjs") + ") : factory(" + externalsRootArray(externals) + ");\n" :
					"		var a = factory();\n"
				) +
				"		for(var i in a) (typeof exports === 'object' ? exports : root)[i] = a[i];\n" +
				"	}\n"
			) +
			"})(this, function(" + externalsArguments(externals) + ") {\nreturn ", "webpack/universalModuleDefinition"), source, "\n});\n");
	}.bind(this));
	mainTemplate.plugin("global-hash-paths", function(paths) {
		if(this.name) paths = paths.concat(this.name);
		return paths;
	}.bind(this));
	mainTemplate.plugin("hash", function(hash) {
		hash.update("fmd");
		hash.update(this.name + "");
	}.bind(this));
};