Disable progress bar if image is piped into client

Previously, running:

    cat something.img | glance image-create --progress --container-format=bare --disk-format=raw

or

    cat something.img | glance --os-image-api-version 2 image-upload --progress <image id>

would result in an error. This error was caused by the length of the
input being unknown, so the overall progress cannot be found.

This patch disables the progress bar whenever the size of the input file
cannot be determined.

Change-Id: I6bfef7441864b638194126880241cc2c96d5b18b
Closes-Bug: #1402746

1 files changed, 6 insertions, 3 deletions

diff --git a/glanceclient/v1/shell.py b/glanceclient/v1/shell.py
index d4d117e..a7888f9 100644
--- a/glanceclient/v1/shell.py
+++ b/glanceclient/v1/shell.py
@@ -225,9 +225,12 @@ def do_image_create(gc, args):
     # Only show progress bar for local image files
     if fields.get('data') and args.progress:
         filesize = utils.get_file_size(fields['data'])
-        fields['data'] = progressbar.VerboseFileWrapper(
-            fields['data'], filesize
-        )
+        if filesize is not None:
+            # NOTE(kragniz): do not show a progress bar if the size of the
+            # input is unknown (most likely a piped input)
+            fields['data'] = progressbar.VerboseFileWrapper(
+                fields['data'], filesize
+            )
 
     image = gc.images.create(**fields)
     _image_show(image, args.human_readable)