It would be nice to be able to use click in the scenario where the user might pass in a path to an executable. In the case that a binary is produced in a folder of the same name, this would catch the scenario where the user passes the directory containing the executable instead of the correct /some/long/path/programname/programname

This is very straightforward to add: https://github.com/sielicki/click/commit/9cd5150da149fa2bff21208811deac6938acfece