Prism.languages.bash = Prism.languages.extend('clike', {
	'comment': {
		pattern: /(^|[^"{\\])(#.*?(\r?\n|$))/g,
		lookbehind: true
	},
	'string': {
		//allow multiline string
		pattern: /("|')(\\?[\s\S])*?\1/g,
		inside: {
			//'property' class reused for bash variables
			'property': /\$([a-zA-Z0-9_#\?\-\*!@]+|\{[^\}]+\})/g
		}
	},
	'keyword': /\b(if|then|else|elif|fi|for|break|continue|while|in|case|function|select|do|done|until|echo|exit|return|set|declare)\b/g
});

Prism.languages.insertBefore('bash', 'keyword', {
	//'property' class reused for bash variables
	'property': /\$([a-zA-Z0-9_#\?\-\*!@]+|\{[^}]+\})/g
});
Prism.languages.insertBefore('bash', 'comment', {
	//shebang must be before comment, 'important' class from css reused
	'important': /(^#!\s*\/bin\/bash)|(^#!\s*\/bin\/sh)/g
});