Add verbose mode for import UUIDs

Only show hundreds of import UUIDs when the user really wants them on upload.

arkindex/cli.py

@@ -101,8 +101,13 @@ def login(context, host, email):
 @click.option(
     '--volume',
 )
+@click.option(
+    '--verbose',
+    is_flag=True,
+    help='Output data import IDs',
+)
 @click.pass_context
-def upload(context, files, corpus, start, mode, volume):
+def upload(context, files, corpus, start, mode, volume, verbose):
     '''
     Upload one or multiple files on the Arkindex host
     '''
@@ -212,4 +217,11 @@ def upload(context, files, corpus, start, mode, volume):
                     local_file, str(e)))
                 continue
 
-    click.echo('Started {} imports with IDs {}'.format(len(import_ids), ', '.join(import_ids)))
+    if not len(import_ids):
+        click.echo('No imports started')
+        return
+
+    if verbose:
+        click.echo('Started {} imports with IDs {}'.format(len(import_ids), ', '.join(import_ids)))
+    else:
+        click.echo('Started {} imports'.format(len(import_ids)))