Subject: bug#41941: Signing git commits with PGP fails

From: Jonathan Brielmaier <[email-masked]>
Date: Fri, 19 Jun 2020 00:35:09 +0200

I have a strange error/problem with signing git commits with PGP.

Following situation

`git` is installed via system configuration
`git:send-email` via `guix install` into the user profile

~/.gitconfig has
```
[commit]
  gpgsign = true
```

but trying to sign a git commit fails:
```
git commit -m "test"
error: gpg failed to sign the data
fatal: failed to write commit object
```

`guix remove git:send-email` does not help, still the same.
`guix install git` also doesn't help.

What is wrong here?

P.S: As long as commit signing is not working I cannot become a commiter
to the repo. Marius and Ricardo already pledged their support :P