Return glob applied, flattened and duplicate filtered version of the given list of filenames
$ npm install flat-glob
flatGlob = require('flat-glob')
flatGlob.sync(['foo.js', 'styles/**/*.css', 'templates/index.html', 'templates/**/*.html'])
// => ['foo.js', 'styles/a.css', 'styles/b.css', 'templates/index.html', 'templates/foo.html', 'templates/bar.html']
flatGlob(['foo.js', 'styles/**/*.css', 'templates/index.html', 'templates/**/*.html'], function (error, files) {
if (error) throw error
files
// => ['foo.js', 'styles/a.css', 'styles/b.css', 'templates/index.html', 'templates/foo.html', 'templates/bar.html']
})