prismjs/plugins/treeview/prism-treeview.js

Prism.languages.treeview = {
	'treeview-part': {
		pattern: /^.+/m,
		inside: {
			'entry-line': [
				{
					pattern: /\|-- |├── /,
					alias: 'line-h'
				},
				{
					pattern: /\|   |│   /,
					alias: 'line-v'
				},
				{
					pattern: /`-- |└── /,
					alias: 'line-v-last'
				},
				{
					pattern: / {4}/,
					alias: 'line-v-gap'
				}
			],
			'entry-name': {
				pattern: /.*\S.*/,
				inside: {
					// symlink
					'operator': / -> /,
				}
			}
		}
	}
};

Prism.hooks.add('wrap', function (env) {
	if (env.language === 'treeview' && env.type === 'entry-name') {
		var classes = env.classes;

		var folderPattern = /(^|[^\\])\/\s*$/;
		if (folderPattern.test(env.content)) {
			// folder

			// remove trailing /
			env.content = env.content.replace(folderPattern, '$1');
			classes.push('dir');
		} else {
			// file

			// remove trailing file marker
			env.content = env.content.replace(/(^|[^\\])[=*|]\s*$/, '$1');

			var parts = env.content.toLowerCase().replace(/\s+/g, '').split('.');
			while (parts.length > 1) {
				parts.shift();
				// Ex. 'foo.min.js' would become '<span class="token keyword ext-min-js ext-js">foo.min.js</span>'
				classes.push('ext-' + parts.join('-'));
			}
		}

		if (env.content[0] === '.') {
			classes.push('dotfile');
		}
	}
});