Commit signing does not support SSH signatures

[grncdr]

It seems that git-revise breaks when git is configured to sign commits with gpg.format = ssh. The comments in #46 indicate that commit signing here is implemented independently of that in Git itself, any chance that support for ssh signing could be added?

I'd be happy to take a crack at implementing it. I know a bit about Gits implementation (it's gotten more complex in recent versions) but I'm not familiar with the git-revise codebase at all so any pointers there would be appreciated.

[krobelus]

Sure A good strategy is to translate what Git does to Python. Both implementations have sign_buffer(), but ours does not respect gpg.format.

[9999years]

I'm a little perplexed that git-revise doesn't just use the built-in git commit signing process. Is there a reason it can't?

[krobelus]

One problem is that Git does not expose a shared library with sign_buffer().
We don't want to shell out to git commit because that does more than we want to, also it requires creating a Git worktree which can be relatively slow.

Maybe there is a third party git library that we could use for signing.