A question about manifest for my profile

[hub . lombard]

Hi Guix!

I generated a 'manifest-to-manifest.scm' manifest of all the packages installed 
in my user profile, using this Guile script (I can not find the address anymore)

----------------------------------------------------------------------------------------------------
;; Run with:
;;     guile -s FILE ~/.guix-profile

(use-modules (guix profiles)
             (ice-9 match)
             (ice-9 pretty-print))

(define (guix-manifest where)
  (sort (map (lambda (entry)
                     (let ((out (manifest-entry-output entry)))
                       (if (string= out "out")
                           (manifest-entry-name entry)
                           (format #f "~a:~a"
                                   (manifest-entry-name entry)
                                   (manifest-entry-output entry)))))
                   (manifest-entries (profile-manifest where)))
        string<?))

;; Thanks to Ivan Vilata-i-Balaguer for this:
(define (guix-commit)
  (let ((guix-manifest (profile-manifest (string-append (getenv "HOME") 
"/.config/guix/current"))))
    (match (assq 'source (manifest-entry-properties (car (manifest-entries 
guix-manifest))))
      (('source ('repository ('version 0) _ _
                             ('commit commit) _ ...))
       commit)
      (_ #f))))

(match (command-line)
  ((_ where)
   (format #t ";; commit: ~a\n" (guix-commit))
   (pretty-print
    `(specifications->manifest
      ',(guix-manifest where))))
  (_ (error "Please provide the path to a Guix profile.")))
----------------------------------------------------------------------------------------------------

Then I called it:

hubert@gnu ~$ guile -s manifest-to-manifest.scm ~/.guix-profile
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;;       or pass the --no-auto-compile argument to disable.
;;; compiling /home/hubert/manifest-to-manifest.scm
;;; compiled 
/home/hubert/.cache/guile/ccache/2.2-LE-8-3.A/home/hubert/manifest-to-manifest.scm.go
;; commit: 6c83c48391ebc2b08ca4704c437de4f1e59fca9a
(specifications->manifest
  '("brasero"
    "ffmpeg"
    "gimp"
    "gnumeric"
    "inkscape"
    "lynx"
    "markdown"
    "mpv"
    "obs"
    "qemu"
    "quassel"
    "racket"
    "sbcl-next"
    "ungoogled-chromium"
    "wget"
    "youtube-dl"
    "youtube-viewer"))
hubert@gnu ~$

Then I made the updates, reconfigured /etc/config.scm and restarted.

I think the launch of the script was more or less equivalent to the following 
command:

$ guix package --manifest=manifest-to-manifest.scm

In which case, I will not need to run this command?

And finally, are there any changes to make in '/etc/config.scm'? Maybe add to 
it:

-----------------------------------------------
(specifications->manifest
  '("brasero"
    "ffmpeg"
    "gimp"
    "gnumeric"
    "inkscape"
    "lynx"
    "markdown"
    "mpv"
    "obs"
    "qemu"
    "quassel"
    "racket"
    "ungoogled-chromium"
    "wget"
    "youtube-dl"
    "youtube-viewer"))
-----------------------------------------------

Thank you in advance for your possible clarification :-)

Hubert