I posted a version of ads-txt-crawler to Clojars the other day and ran into a bit of trouble as I was on a new machine.
The command "lein deploy clojars" returned the following error.
Could not sign /Users/brad/work/github/ads-txt-crawler/target/ads-txt-crawler-0.0.6.jar
Cannot run program "gpg": error=20, Not a directory
See `lein help gpg` for how to set up gpg.
Being on a Mac I used to install gpg
#+BEGIN_EXAMPLE
brew install gpg
brew insall gpg-agent
#+END_EXAMPLE
Some other interesting links found related gpg and releasing to Clojars