Re: [bug report] Signing your work: GnuPG signing failed (gpg version 2.1)

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On Wed, Aug 05, 2015 at 10:35:45PM +0200, Hugo Roy wrote:
> 
> Hello,
> 
> I've tried to sign a commit following
> https://git-scm.com/book/tr/v2/Git-Tools-Signing-Your-Work however,
> this is what happened:
> 
>     % git commit -a -S -m "signed commit testing"
>     gpg: échec de la signature : Opération annulée
>     gpg: signing failed: Opération annulée
>     error: gpg n'a pas pu signer les données
>     fatal: échec de l'écriture de l'objet commit
> 
> sorry for the locale, "annulée" means cancelled and the last two
> lines mean:
> 
>     error: gpg could not sign data
>     fatal: failure to write the commit object
> 
> However, when I tried later, nothing specific happened and the commit
> was done just as if I did not add the -S option:
> 
>     % git commit -a -S -m "signed commit test"
>     [master 739cdd3] signed commit test
>     1 file changed, 5 deletions(-)
> 
> Commit:
> https://github.com/hugoroy/.emacs.d/commit/b8e5b72def0c5fcc760c84d6ecd2b95b9727ae62
> 
> 
> 
> I notice in the git-scm.com manual that they use GnuPG version 1. I
> use GnuPG 2.1.6 with libgcrypt 1.6.3.

I believe this is a bug in GnuPG 2.1 or the relevant pinentry.  Debian
bug #793016[0] describes my experience with it.  Killing the gpg-agent
when this occurs and letting it respawn works for me.  I'm very certain
that this is not a bug in Git, though.

GnuPG 2.1 provides the same command line interface as GnuPG 1, so it
will work the same way with git.  Failing to sign is a GnuPG problem,
not a Git problem.

[0] https://bugs.debian.org/790316
-- 
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187

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