So you might have a script that does stuff as a library, and it should get environment variables and other info from the calling script. You use the same script for doing one off stuff on different computers.

So you make it do something slightly different or make it set it’s path and look into the current folder when you run it directly. This change in logic could be in a few points in the script.

Now think about this, you have logic that doesn’t make sense when run directly, but you need it to be a library.

You have multiple name=main statements in some of your functions