HOME=something stops working if you have no single place for your repos. But I did not want to overdo it with configuration parameters. I wrote this for myself and did not intend to share it initially.
And I actually prefer to understand what the hell I was thinking, so writing readable code makes sense to me ... ;-)

Admittedly, sh makes it relatively easy to write a horrible mess of a code. One of the reasons why I resort to other languages for more complicated tasks, e.g. those which require interactive user input.