JSHint reporter for checkstyle decoding severity

checkstyle.js

// Author: Boy Baukema
// http://github.com/relaxnow
module.exports =
{
	reporter: function (results, data, opts)
	{
		"use strict";

		var files = {},
			out = [],
			pairs = {
				"&": "&",
				'"': """,
				"'": "'",
				"<": "&lt;",
				">": "&gt;"
			},
			fileName, i, issue, errorMessage;

		opts = opts || {};

		function encode(s) {
			for (var r in pairs) {
				if (typeof(s) !== "undefined") {
					s = s.replace(new RegExp(r, "g"), pairs[r]);
				}
			}
			return s || "";
		}

        function getSeverity( code ) {
            var severity = "error";
            if ( code ) {
                switch( code.substring( 0, 1 ) ) {
                    case "I":
                        severity = "info";
                        break;

                    case "W":
                        severity = "warning";
                        break;

                    case "E":
                    default:
                        severity = "error";
                }
            }
            return severity;
        }

		results.forEach(function (result) {
			// Register the file
			result.file = result.file.replace(/^\.\//, '');
			if (!files[result.file]) {
				files[result.file] = [];
			}

			// Create the error message
			errorMessage = result.error.reason;
			if (opts.verbose) {
				errorMessage += ' (' + result.error.code + ')';
			}

			// Add the error
			files[result.file].push({
				severity: getSeverity( result.error.code ),
				line: result.error.line,
				column: result.error.character,
				message: errorMessage,
				source: 'jshint.' + result.error.code
			});
		});


		out.push("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
		out.push("<checkstyle version=\"4.3\">");

		for (fileName in files) {
			if (files.hasOwnProperty(fileName)) {
				out.push("\t<file name=\"" + fileName + "\">");
				for (i = 0; i < files[fileName].length; i++) {
					issue = files[fileName][i];
					out.push(
						"\t\t<error " +
							"line=\"" + issue.line + "\" " +
							"column=\"" + issue.column + "\" " +
							"severity=\"" + issue.severity + "\" " +
							"message=\"" + encode(issue.message) + "\" " +
							"source=\"" + encode(issue.source) + "\" " +
							"/>"
					);
				}
				out.push("\t</file>");
			}
		}

		out.push("</checkstyle>");

		process.stdout.write(out.join("\n") + "\n");
	}
};