[bug#30351] [PATCH] gnu: mcron2: Correct and enhance the wrap phase.

[ng0@n0.is]

On Sun, 04 Feb 2018, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:
> Hello!
>
> As a follow up to my previous patch to mcron2, this completes the wrap
> phases and fix a small issue where the mcron modules were installed to
> share/guile/site/2.0 instead of 2.2.

Looks promising, this could fix the issue I still have.
I reconfigured the system and it looks good to me. At least the
no errors are being displayed.

> For those using dyndns services, a job like the following should now
> work without having to propagate Guile or GnuTLS in your user/system
> profile[0]:
>
> --8<---------------cut here---------------start------------->8---
> ;;; Secrets defined as variables prefixed by "sec-".
> (include "/abs/path/to/your/secrets.scm")
>
> (define duckdns-job
>   ;; Update personal domain IP every 5 minutes.
>   #~(job '(next-minute (range 0 60 5))
> 	 (lambda ()
> 	   (use-modules (web client))
> 	   (http-get
> 	    (string-append
> 	     "https://www.duckdns.org/update?domains=apteryx&token="
> 	     #$sec-dyndns-token "&ip=")))))
>
> (operating-system
>  ...
>  (services
>   (cons*
>    (mcron-service (list duckdns-job))
>    ...
> --8<---------------cut here---------------end--------------->8---
>
> I had tested my previous patch as a user (where Guile and GnuTLS were
> installed), so it was working, but after testing from the "real" herd
> service (which runs as root), it was failing, not finding the (web
> client) and GnuTLS modules.
>
> The attached patch fixes that.
>
> From 385343b1370d87e6104ebe2ef473bf2d1e31f2f2 Mon Sep 17 00:00:00 2001
> From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
> Date: Sun, 4 Feb 2018 14:05:40 -0500
> Subject: [PATCH] gnu: mcron2: Correct and enhance the wrap phase.
>
> * gnu/packages/guile.scm (mcron2)[inputs]: Rename "guile-2.2" to just "guile".
> [phases]: Install mcron2 modules to guile/site/2.2 instead of guile/site/2.0.
> Add Guile 2.2 and GnuTLS modules to the wrap phase.
> ---
>  gnu/packages/guile.scm | 43 ++++++++++++++++++++++++++-----------------
>  1 file changed, 26 insertions(+), 17 deletions(-)
>
> diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
> index 3bc18ffdd..37e6703fa 100644
> --- a/gnu/packages/guile.scm
> +++ b/gnu/packages/guile.scm
> @@ -64,6 +64,7 @@
>    #:use-module (gnu packages sdl)
>    #:use-module (gnu packages maths)
>    #:use-module (gnu packages image)
> +  #:use-module (gnu packages tls)
>    #:use-module (gnu packages version-control)
>    #:use-module (gnu packages xdisorg)
>    #:use-module (gnu packages xorg)
> @@ -632,7 +633,8 @@ format is also supported.")
>           ("texinfo" ,texinfo)
>           ("help2man" ,help2man)))
>        (inputs
> -       `(("guile-2.2" ,guile-2.2)
> +       `(("guile" ,guile-2.2)
> +         ("gnutls" ,gnutls)             ;for the wrap-mcron phase
>           ,@(srfi-1:alist-delete "guile" (package-inputs mcron))))
>        (arguments
>         `(#:modules ((ice-9 match) (ice-9 ftw)
> @@ -645,6 +647,7 @@ format is also supported.")
>             (add-after 'unpack 'use-guile-2.2
>               (lambda _
>                 (substitute* "configure.ac"
> +                 (("guile/site/2.0") "guile/site/2.2")
>                   (("PKG_CHECK_MODULES\\(\\[GUILE\\],.*$")
>                    "PKG_CHECK_MODULES([GUILE], [guile-2.2])\n"))
>                 #t))
> @@ -652,22 +655,28 @@ format is also supported.")
>               (lambda _
>                 (invoke "autoreconf" "-vfi")))
>             (add-after 'install 'wrap-mcron
> -             (lambda* (#:key outputs #:allow-other-keys)
> -               ;; Wrap the 'mcron' command to refer to the right
> -               ;; modules.
> -               (let* ((out  (assoc-ref outputs "out"))
> -                      (bin  (string-append out "/bin"))
> -                      (site (string-append
> -                             out "/share/guile/site")))
> -                 (match (scandir site)
> -                   (("." ".." version)
> -                    (let ((modules (string-append site "/" version)))
> -                      (wrap-program (string-append bin "/mcron")
> -                        `("GUILE_LOAD_PATH" ":" prefix
> -                          (,modules))
> -                        `("GUILE_LOAD_COMPILED_PATH" ":" prefix
> -                          (,modules)))
> -                      #t))))))))))))
> +             (lambda* (#:key inputs outputs #:allow-other-keys)
> +               ;; Wrap the 'mcron' command to refer to the right modules. We
> +               ;; also include Guile 2.2 modules and GnuTLS, so that Guile
> +               ;; libraries can be used in mcron jobs without having to
> +               ;; propagate those in a user profile.
> +               (let* ((site-dir "/share/guile/site/2.2")
> +                      (ccache-dir "/lib/guile/2.2/ccache")
> +                      (mcron  (assoc-ref outputs "out"))
> +                      (mcron-bin (string-append mcron "/bin/mcron"))
> +                      (mcron-modules (string-append mcron site-dir))
> +                      (guile (assoc-ref inputs "guile"))
> +                      (guile-modules (string-append guile site-dir))
> +                      (guile-ccache (string-append guile ccache-dir))
> +                      (gnutls (assoc-ref inputs "gnutls"))
> +                      (gnutls-modules (string-append gnutls site-dir))
> +                      (gnutls-ccache (string-append gnutls ccache-dir)))
> +                 (wrap-program mcron-bin
> +                   `("GUILE_LOAD_PATH" ":" prefix
> +                     (,mcron-modules ,guile-modules ,gnutls-modules))
> +                   `("GUILE_LOAD_COMPILED_PATH" ":" prefix
> +                     (,mcron-modules ,guile-ccache ,gnutls-ccache)))
> +                 #t)))))))))
>  
>  (define-public guile-ics
>    (package

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