added placeholders

webpack/react-starter#69

Author: sokra

lib/placeholdersLoader.js

@@ -0,0 +1,21 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var parseSource = require("./parseSource");
+var getPlaceholderIdent = require("./getPlaceholderIdent");
+
+module.exports = function(content) {
+	if(this.cacheable) this.cacheable();
+
+	var stuff = parseSource(content);
+
+	var placeholders = {};
+	stuff.placeholders.forEach(function(placeholder) {
+		if(!placeholders[placeholder.name]) {
+			placeholders[placeholder.name] = getPlaceholderIdent(this, placeholder.name);
+		}
+	}, this);
+
+	return "module.exports = " + JSON.stringify(placeholders) + ";";
+};

placeholders.js

@@ -0,0 +1,5 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+module.exports = require("./lib/placeholdersLoader");