Public bug reported:
We should check if `args is None` before doing `len(args)` to avoid a `object
of type
'NoneType'` has no len()` error.
Currently what happens:
```
$ glance-replicator size
2016-07-04 09:51:19.030 30204 ERROR glance.cmd.replicator [-] replication_size
size <server:port>
Determine the size of a glance instance if dumped to disk.
server:port: the location of the glance instance.
ERROR: object of type 'NoneType' has no len()
```
What I expect to happen:
```
$ glance-replicator size
2016-07-04 09:52:02.389 30483 ERROR glance.cmd.replicator [-] replication_size
size <server:port>
Determine the size of a glance instance if dumped to disk.
server:port: the location of the glance instance.
ERROR: Too few arguments.
```
** Affects: glance
Importance: Undecided
Assignee: Marc Abramowitz (msabramo)
Status: In Progress
** Tags: glance-replicator
** Changed in: glance
Assignee: (unassigned) => Marc Abramowitz (msabramo)
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https://bugs.launchpad.net/bugs/1599169
Title:
glance-replicator size raises "object of type 'NoneType' has no len()"
exception when no args provided
Status in Glance:
In Progress
Bug description:
We should check if `args is None` before doing `len(args)` to avoid a `object
of type
'NoneType'` has no len()` error.
Currently what happens:
```
$ glance-replicator size
2016-07-04 09:51:19.030 30204 ERROR glance.cmd.replicator [-]
replication_size size <server:port>
Determine the size of a glance instance if dumped to disk.
server:port: the location of the glance instance.
ERROR: object of type 'NoneType' has no len()
```
What I expect to happen:
```
$ glance-replicator size
2016-07-04 09:52:02.389 30483 ERROR glance.cmd.replicator [-]
replication_size size <server:port>
Determine the size of a glance instance if dumped to disk.
server:port: the location of the glance instance.
ERROR: Too few arguments.
```
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