code: def sync_in(self, force=False):
          
          self.log('---- Sync In ----')
  
          self.dstate = self.STATES.BUILDING
  
          for path_name in self.source_fs.listdir():
  
              f = self.build_source_files.instance_from_name(path_name)
  
              if not f:
                  self.warn('Ignoring unknown file: {}'.format(path_name))
                  continue
  
              if f and f.exists and (f.fs_is_newer or force):
                  self.log('Sync: {}'.format(f.record.path))
                  f.fs_to_record()
                  f.record_to_objects()
  
          self.commit()
  
          self.library.search.index_bundle(self, force=True)
docs: Synchronize from files to records, and records to objects