solid-code/src/jshint-wrapper.js

JavaScript code quality front-end

var jshint = require('jshint').JSHINT;
var path = require('path');
var fs = require('fs');

module.exports = {
	run: run
};

var jshintOptions = {
	"es5":       true,
	"boss":      true,
	"node":      true,
	"strict":    true,
	"white":     true,
	"smarttabs": true,
	"maxlen":    100,
	"newcap":    false,
	"undef":     true,
	"unused":    true,
	"onecase":   true,
	"indent":    4
};

var jshintGlobals = {
	require: true,
	module: true,
	console: true,
	process: true
};

// returns list of errors through callback
function run(options, cb) {
	"use strict";
	console.assert(options, 'missing options');
	console.assert(options.filename, 'missing input filename');
	if (cb) {
		console.assert(typeof cb === 'function', 'expected callback function');
	}

	fs.readFile(options.filename, 'utf-8', function onFileData(err, data) {
		if (err) throw err;
		if (!jshint(data, jshintOptions, jshintGlobals)) {
			var errors = reporter(options.filename, jshint.errors);
			console.assert(Array.isArray(errors), 'expected array of errors');
			if (cb) {
				cb(errors);
			}
		}
	});
}

function reporter(filename, res) {
	"use strict";
	var len = res.length;
	var str = "";

	var errors = [];

	res.forEach(function (r) {
		var err = r;
		str += "line " + err.line + ", col " +
			err.character + ", " + err.reason + "\n";
		errors.push({
			line: err.line,
			column: err.character,
			reason: err.reason
		});
	});

	if (str) {
		console.log(str + len + " jshint error" +
			((len === 1) ? "" : "s"));
	}
	return errors;
}

if (!module.parent) {
	var filename = process.argv[2];
	console.assert(filename, 'missing input filename');
	run({
		filename: filename
	});
}