bug#56867: [PATCH] download: Do not wrap TLS port on GnuTLS >= 3.7.7.

["Ludovic Courtès" <ludo@gnu.org>]

Ludovic Courtès <ludo@gnu.org> skribis:

> The custom input/output port wrapping the TLS session record port would
> introduce overhead, and it would also prevent its uses in a non-blocking
> context--e.g., with Fibers.  The port close mechanism added in GnuTLS
> 3.7.7 allows us to get rid of that wrapper.
>
> * guix/build/download.scm (wrap-record-port-for-gnutls<3.7.7): New
> procedure, with code formerly in 'tls-wrap'.
> (tls-wrap): Check for 'set-session-record-port-close!' and use it when
> available; otherwise call 'wrap-record-port-for-gnutls<3.7.7'.
> ---
>  guix/build/download.scm | 102 +++++++++++++++++++++-------------------
>  1 file changed, 54 insertions(+), 48 deletions(-)

Pushed as Guix commit dd573ceea73295c7a872088ecd91e5f0fd74bf2b.

Ludo’.