[bug#56898] [PATCH 12/13] installer: Render the final configuration with (guix read-print).

[Ludovic Courtès]

* gnu/installer.scm (module-to-import?): Return #t for (guix read-print).
* gnu/installer/steps.scm (configuration->file): Use
'pretty-print-with-comments/splice' instead of 'for-each' and 'pretty-print'.
---
 gnu/installer.scm       |  3 ++-
 gnu/installer/steps.scm | 12 +++++-------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/gnu/installer.scm b/gnu/installer.scm
index 415f5a7af7..8a6e604fa5 100644
--- a/gnu/installer.scm
+++ b/gnu/installer.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
-;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2019, 2020, 2022 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
 ;;;
@@ -63,6 +63,7 @@ (define module-to-import?
     (('gnu 'installer _ ...) #t)
     (('gnu 'build _ ...) #t)
     (('guix 'build _ ...) #t)
+    (('guix 'read-print) #t)
     (_ #f)))
 
 (define not-config?
diff --git a/gnu/installer/steps.scm b/gnu/installer/steps.scm
index 8bc38181a7..f1d61a2bc5 100644
--- a/gnu/installer/steps.scm
+++ b/gnu/installer/steps.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2018, 2019 Mathieu Othacehe <m.othacehe@gmail.com>
-;;; Copyright © 2020, 2021 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2020-2022 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -21,9 +21,9 @@ (define-module (gnu installer steps)
   #:use-module (guix records)
   #:use-module (guix build utils)
   #:use-module (guix i18n)
+  #:use-module (guix read-print)
   #:use-module (gnu installer utils)
   #:use-module (ice-9 match)
-  #:use-module (ice-9 pretty-print)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-35)
@@ -244,11 +244,9 @@ (define* (configuration->file configuration
 ;; by the graphical installer.\n")
                port)
       (newline port)
-      (for-each (lambda (part)
-                  (if (null? part)
-                      (newline port)
-                      (pretty-print part port)))
-                configuration)
+      (pretty-print-with-comments/splice port configuration
+                                         #:max-width 75)
+
       (flush-output-port port))))
 
 ;;; Local Variables:
-- 
2.37.1