** Description changed:
+ [ Impact ]
+
+ * There is a bug in cmd2 v0.8.5 where an exception is thrown when GTK3
+ libraries are not installed. This causes Python applications using
+ cmd2 to crash unexpectedly
+
+ * This patch backports a fix from upstream that handles that expection
+ gracefully, allowing applications to function properly.
+
+ * The workaround to this was to install GTK3, which is not ideal as the
+ Python applications are command line tools, not graphical
+
+ [ Test Plan ]
+
+ * Deploy focal
+
+ * Install an application that has cmd2 as a dependency
+ e.g. python3-openstackclient
+
+ * Run command that uses cmd2: `openstack server list`
+
+ [ Where problems could occur ]
+
+ * This changes the error handling for a library that is used by many
+ Python applications. Some of these applications could rely on the
+ existing behavior (a ValueError exception being thrown) to detect
+ certain configurations and change their behavior accordingly.
+
+ * This would result in those applications failing under certain use
+ cases. For example, the configuration in question is a headless
+ Linux system without GTK libraries installed.
+
+ [ Original bug description ]
+
Openstack release: Wallaby
OS: Ubuntu 20.04 server edition
- After installation of python3-openstackclient from apt, while setting up
user, roles and project, I executed following command:
+ After installation of python3-openstackclient from apt, while setting up
user, roles and project, I executed following command:
openstack domain create --description "An Example Domain" example
- Error:
+ Error:
Traceback (most recent call last):
File "/usr/bin/openstack", line 6, in <module>
from openstackclient.shell import main
File "/usr/lib/python3/dist-packages/openstackclient/shell.py", line 23, in
<module>
from osc_lib import shell
File "/usr/lib/python3/dist-packages/osc_lib/shell.py", line 24, in <module>
from cliff import app
File "/usr/lib/python3/dist-packages/cliff/app.py", line 22, in <module>
import cmd2
File "/usr/lib/python3/dist-packages/cmd2.py", line 585, in <module>
_ = pyperclip.paste()
File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 667, in
lazy_load_stub_paste
copy, paste = determine_clipboard()
File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 558, in
determine_clipboard
return init_gi_clipboard()
File "/usr/lib/python3/dist-packages/pyperclip/__init__.py", line 167, in
init_gi_clipboard
gi.require_version('Gtk', '3.0')
File "/usr/lib/python3/dist-packages/gi/__init__.py", line 129, in
require_version
raise ValueError('Namespace %s not available' % namespace)
Had to install GTK3 to make openstack commands work but it is taking
huge time to get a response to the commands. The wait time after firing
any openstack cli command is around 30 seconds.
Anybody faced the issue? What is the fix for it if it exists?
** Patch added: "lp1945661.debdiff"
https://bugs.launchpad.net/ubuntu/+source/cmd2/+bug/1945661/+attachment/5801946/+files/lp1945661.debdiff
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https://bugs.launchpad.net/bugs/1945661
Title:
openstack commands fail with GTK3 error
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