Add task to check configuration file syntax.

tests/configs/check_config.js

@@ -0,0 +1,66 @@
+/* Magic Mirror
+ *
+ * Checker configuration file
+ *
+ * By Rodrigo Ramírez Norambuena
+ *    https://rodrigoramirez.com
+ *
+ * MIT Licensed.
+ *
+ */
+
+var v = require("jshint");
+var path = require("path");
+var fs = require("fs");
+var Utils = require(__dirname + "/../../js/utils.js");
+
+if (process.env.NODE_ENV == "test") {return 0};
+
+/* getConfigFile()
+ * Return string with path of configuration file
+ * Check if set by enviroment variable MM_CONFIG_FILE
+ */
+function getConfigFile() {
+	// FIXME: This function should be in core. Do you want refactor me ;) ?, be good!
+	rootPath = path.resolve(__dirname + "/../../");
+	var configFileName = path.resolve(rootPath + "/config/config.js");
+	if (process.env.MM_CONFIG_FILE) {
+		configFileName = path.resolve(process.env.MM_CONFIG_FILE);
+	}
+	return configFileName;
+}
+
+var configFileName = getConfigFile();
+// Check if file is present
+if (fs.existsSync(configFileName) === false) {
+	console.error(Utils.colors.error("File not found: "), configFileName);
+	return;
+}
+// check permision
+try {
+	fs.accessSync(configFileName, fs.F_OK);
+} catch (e) {
+	console.log(Utils.colors.error(e));
+	return;
+}
+
+// Validate syntax of the configuration file.
+// In case the there errors show messages and
+// return
+console.info(Utils.colors.info("Checking file... ", configFileName));
+                            // I'm not sure if all ever is utf-8
+fs.readFile(configFileName, "utf-8", function(err, data) {
+	if (err) {throw err;}
+	v.JSHINT(data); // Parser by jshint
+
+	if (v.JSHINT.errors.length == 0) {
+		console.log("Your configuration file don't containt syntax error :)");
+		return true;
+	} else {
+		errors = v.JSHINT.data().errors;
+		for (idx in errors) {
+			error = errors[idx];
+			console.log("Line", error.line, "col", error.character, error.reason);
+		}
+	}
+});