Installing scmbug glue logic and getting "File "post-commit" cannot be opened No such file or directory"

Guess what?
You may have a partially installed scmbug and it left files in the hooks directory which make the tool think it's upgrading the install.
It's not finding the pre-commit file it expects and bails out...

So what should you do?

cd
rm -rf bin etc lib

Assuming that bin,etc, and lib directories only have the scmbug files in them.

Then try again to install the glue logic...