grunt.registerTask('buildapp', [
   'clean:app',
   'string-replace:app_version',
   'copy:app_build_index',
   'copy:app_build_config',
   'ngconstant:app80',
   'compress:app80',
   'string-replace:app80',
   'ngconstant:app443',
   'compress:app443',
   'string-replace:app443',
   'ngconstant:app6001',
   'compress:app6001',
   'string-replace:app6001'
])

Peut se réécrire comme ca. C'est plaus maintenable et tu peux mettre ta tache d'obfuscation dedans facilement ;)

grunt.registerTask('buildapp', [
  'clean:app',
  'string-replace:app_version',
  'copy:app_build_index',
  'copy:app_build_config',
  'processByPort:80',
  'processByPort:443',
  'processByPort:6001',
]);
grunt.registerTask('processByPort', 'port specific alias for [ngconstant, compress, string-replace]', function _processByPort(n) {
  grunt.task.run('ngconstant:app' + n, 'compress:app' + n, 'string-replace:app' + n);
});