extension.js
f6e94234d26ddrf-api-tracking

extension.js
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			var path = require('path');

			var EXTRE = /\.[^.]*/g;
			var LONGEXTRE = /^[.]?[^.]+([.].+[^.])$/;

			module.exports = function(input) {
			var basename = path.basename(input);
			var longExtension = LONGEXTRE.exec(basename);
			if (!longExtension) {
			return;
			}
			var possibleExtensions = longExtension[1].match(EXTRE);
			if (!possibleExtensions) {
			return;
			}
			return possibleExtensions.map(function(_, idx, exts) {
			return exts.slice(idx).join('');
			});
			};