--- /dev/null
+/**
+ * @fileoverview unix-style formatter.
+ * @author oshi-shinobu
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Helper Functions
+//------------------------------------------------------------------------------
+
+/**
+ * Returns a canonical error level string based upon the error message passed in.
+ * @param {Object} message Individual error message provided by eslint
+ * @returns {string} Error level string
+ */
+function getMessageType(message) {
+ if (message.fatal || message.severity === 2) {
+ return "Error";
+ }
+ return "Warning";
+
+}
+
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+module.exports = function(results) {
+
+ let output = "",
+ total = 0;
+
+ results.forEach(result => {
+
+ const messages = result.messages;
+
+ total += messages.length;
+
+ messages.forEach(message => {
+
+ output += `${result.filePath}:`;
+ output += `${message.line || 0}:`;
+ output += `${message.column || 0}:`;
+ output += ` ${message.message} `;
+ output += `[${getMessageType(message)}${message.ruleId ? `/${message.ruleId}` : ""}]`;
+ output += "\n";
+
+ });
+
+ });
+
+ if (total > 0) {
+ output += `\n${total} problem${total !== 1 ? "s" : ""}`;
+ }
+
+ return output;
+};