Re: emacs-25 and Hydra

[Ricardo Wurmus <rekado@elephly.net>]

Xue Fuqiao <xfq.free@gmail.com> writes:

> The Emacs continuous build on Hydra doesn't have a jobset for the
> emacs-25 branch[1].  Does anyone know how to add one?

I don’t know how to add a jobset to NixOS’s hydra instance.  (Though I
see that there’s “emacs-trunk” already.)

Another thing that could be done is add a package variant for emacs-next
to GNU Guix, which would make our instance of Hydra build it.
Currently, there are only builds for Emacs 24.5 and latest Guile Emacs:

   http://hydra.gnu.org/search?query=emacs

Adding a recipe like this to ‘gnu/packages/emacs.scm’ should be
sufficient:

(define-public emacs-next
  (let ((commit "1721600d24"))
    (package (inherit emacs)
      (name "emacs-next")
      (version (string-append "20151117." commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "git://git.sv.gnu.org/emacs.git")
                      (commit commit)))
                (sha256
                 (base32
                  "0m2xymficfw10iny4v58ksw4gys1bv4zg0y29dx40wv2jfll9h2h"))))
      (native-inputs
       `(("autoconf" ,autoconf)
         ("automake" ,automake)
         ,@(package-native-inputs emacs)))
      (arguments
       (substitute-keyword-arguments (package-arguments emacs)
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'unpack 'autogen
              (lambda _
                (zero? (system* "sh" "autogen.sh")))))))))))

Note that this won’t automatically be updated to the latest commit.  It
would have to be updated manually, which probably is not what you want.

~~ Ricardo