stylint/src/checks/var.js

A linter for stylus

'use strict';

var
	eqEnd = /=$|=\s$/,
	hash = /\{$/,
	varCheck = /\$\w+/;

// check that $ is used when declaring vars
module.exports = function checkVarStyle( line ) {
	if ( typeof line !== 'string' ) { return; }

	// check if = is present on line at all
	if ( line.indexOf(' = ') !== -1 ) {
		// if so, make sure it's not a block or hash
		if ( line.indexOf('@block') === -1 &&
			!hash.test(line) &&
			!eqEnd.test(line) ) {

			// at this point assume this line is defining a var and we check that the line starts with a $
			// and that it doesn't end with = (meaning its a block)
			if ( varCheck.test( line ) ) {
				return true;
			}
			else {
				return false;
			}
		}
	}
};