Fix bug in CLI tool

edosl0util/cli.py

 """
 Console script entry points for CLI tools.
 """
-from datetime import datetime
+import os
 
 from edosl0util import split
 
@@ -10,12 +10,8 @@ def cmd_split():
     from argparse import ArgumentParser
     parser = ArgumentParser(description=split.__doc__)
     parser.add_argument('--minutes', type=int, default=6)
-    parser.add_argument('--output-format', default='%y%j%H%M%S001.PDS')
     parser.add_argument('filepath')
     args = parser.parse_args()
 
-    for time, offset, count, blob in split.split(open(args.filepath), args.minutes):
-        stamp = datetime.utcfromtimestamp(time)
-        filepath = stamp.strftime(args.output_format)
-        print("writing %d packets from offset %d to %s" % (count, offset, filepath))
-        open(filepath, 'wb', buffering=0).write(blob)
+    for stamp, fpath in split.split_file(args.filepath, args.minutes, os.getcwd()):
+        print('wrote bucket {} to {}'.format(stamp.isoformat(), fpath))