const packlist = require('npm-packlist') const npmContent = require('list-npm-contents'); npmContent('mapbox-gl').then(function(last_version_files) { packlist({ path: '.' }).then(function(new_version_files) { new_version_files = new_version_files.map(file => file.replace(/\/\/+/g, '/')); let diff_new = new_version_files.filter(x => !last_version_files.includes(x)); let diff_last = last_version_files.filter(x => !new_version_files.includes(x)); console.log(`${diff_new.length} files are about to be added in the new tarball`) diff_new.forEach(file => { console.log('+', file); }); console.log(`${diff_last.length} files are about to be deleted in the new tarball`) diff_last.forEach(file => { console.log('-', file); }); }); });