bug#27222: [PATCH] emacs-build-system install phase doesn't honor directory hierarchy

[Alex Kost <alezost@gmail.com>]

I Cc-ed Arun, the author of the mentioned change (commit
d879685176d23c111f4fc665698251b25cdf9124).

[...]
> From a035d07dfa6cbddccfa0476e2009d19bdf296941 Mon Sep 17 00:00:00 2001
> From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
> Date: Sat, 3 Jun 2017 23:43:02 -0700
> Subject: [PATCH] build-system: emacs: Install elisp files from subdirectories
>
> * guix/build/emacs-build-system.scm (install)[include]: Get rid of default
> value.
> [exclude]: Likewise.
> * guix/build/emacs-build-system.scm (emacs-build)[include]: Modify default
> regexp value so that elisp files get matched (and installed) for any directory
> depth level.
> ---
>  guix/build-system/emacs.scm       | 2 +-
>  guix/build/emacs-build-system.scm | 5 +----
>  2 files changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/guix/build-system/emacs.scm b/guix/build-system/emacs.scm
> index 9a46ecfd2..a97fcedc3 100644
> --- a/guix/build-system/emacs.scm
> +++ b/guix/build-system/emacs.scm
> @@ -83,7 +83,7 @@
>                        (phases '(@ (guix build emacs-build-system)
>                                    %standard-phases))
>                        (outputs '("out"))
> -                      (include ''("^[^/]*\\.el$" "^[^/]*\\.info$" "^doc/.*\\.info$"))
> +                      (include ''("\\.el$" "^[^/]*\\.info$" "^doc/.*\\.info$"))

As far as I understand it, it was done for purpose: some packages
include "uninteresting" (for tests, maintenance, etc.) *.el files in
subdirs, that's why they are excluded by default.  So probably a better
solution would be to fix 'ert-runner' package (as it is done in commit
b1d32ec0e23bfec1dab4c56909228a494b2b0d60, for example).  WDYT?

>                        (exclude ''("^\\.dir-locals\\.el$" "-pkg\\.el$" "^[^/]*tests?\\.el$"))
>                        (search-paths '())
>                        (system (%current-system))
> diff --git a/guix/build/emacs-build-system.scm b/guix/build/emacs-build-system.scm
> index 50af4be36..1373cb6f7 100644
> --- a/guix/build/emacs-build-system.scm
> +++ b/guix/build/emacs-build-system.scm
> @@ -95,10 +95,7 @@ store in '.el' files."
>            (substitute-cmd))))
>      #t))
>  
> -(define* (install #:key outputs
> -                  (include '("^[^/]*\\.el$" "^[^/]*\\.info$" "^doc/.*\\.info$"))
> -                  (exclude '("^\\.dir-locals\\.el$" "-pkg\\.el$" "^[^/]*tests?\\.el$"))
> -                  #:allow-other-keys)
> +(define* (install #:key outputs include exclude #:allow-other-keys)
>    "Install the package contents."

I also think these arguments are redundant!  I suggested to remove this
duplication at:

  https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26559#41

-- 
Alex