Signing merge commit with magit

Question

I know how to sign standard commits using magit, but I'm not able to sign the commits generated by merges. Is there any way to do that?

Answer 1

You can add additional options to an existing popup:

(magit-define-popup-option 'magit-merge-popup
  ?S "Sign using gpg" "--gpg-sign=" magit-read-gpg-secret-key)

This was copied straight from magit-commit-popup.

Also see https://github.com/magit/magit/wiki/Additional-proposed-infix-arguments-and-suffix-commands.