[PATCH v2] pull: warn on --verify-signatures with --rebase
Previously git-pull silently ignored the --verify-signatures option for
--rebase, potentially leaving users in the believe that the rebase
operation would check for valid GPG signatures.
Implementing --verify-signatures for git-rebase was talked about, but
doubts for a valid workflow rose up.
Since you usually merge other's branches into your branch you might have
an interest that their side has a valid GPG signature.
Rebasing, on the other hand, is you building something on top of
another's branch, essentially giving you the power to keep things sane.
If a valid use case is found, where --verify-signatures for git-rebase
looks sensible, that feature may be added then.
A warning was chosen in favor of emitting an error to prevent potential
breakage. A warning keeps things running, scripts for instance, while
still informing users about possibly unexpected behavior.