enable both formats

mgship/cli.py

@@ -6,7 +6,7 @@
 import logging
 
 from mgship import mgship
-from mgship.destination import csv
+from mgship.destination import csv, json
 from mgship.cliparam import DateTime, Loglevel
 from mgship.util import utctimestamp, validate_past
 from mgship.log import logger
@@ -34,11 +34,14 @@ def to_timestamp(ctx, param, value):
 
 
 @main.command()
+@click.option('--format', default='csv', type=click.Choice(['json', 'csv']),
+              help='the output format')
 @click.option('--begin', default=None, type=DateTime(),
               callback=to_timestamp,
               help='when to start archiving, as unix timestamp')
-def archive(*args, **kwargs):
-    mgship.Archive(csv.Destination(), *args, **kwargs).ship()
+def archive(format, *args, **kwargs):
+    dest = csv.Destination() if format == 'csv' else json.Destination()
+    mgship.Archive(dest, *args, **kwargs).ship()
 
 
 if __name__ == "__main__":