Welcome to Dark Chestnut.
I blog here on Common Lisp topics, mostly about things I encountered while building a production grade web application.
Run Common Lisp web applications in the cloud.
Sometimes it may be necessary to execute an external command that takes a long time to complete, long enough that the user needs visual feedback while it is running to show that the process is still alive.
How to process sub-command style command line arguments is a question that arises more and more. Many of the basic option handling libraries can not handle this at all, or they make it very difficult to do so.
I was searching for a command line option parser that can handle git-style sub-commands and found a whole bunch of libraries. It appears as if libraries on this topic proliferate more than usual.