guix home: Add 'edit' sub-command.

* guix/scripts/home/edit.scm: New file.
* Makefile.am (MODULES): Add it.
* guix/scripts/home.scm (show-help): Add "edit".
(process-command): Handle it.
(guix-home): Add it.
* po/guix/POTFILES.in: Add 'guix/scripts/home/edit.scm'.
* doc/guix.texi (Invoking guix home): Document it.

1 files changed, 66 insertions, 0 deletions

diff --git a/guix/scripts/home/edit.scm b/guix/scripts/home/edit.scm
new file mode 100644
index 0000000000..a6c05675b3
--- /dev/null
+++ b/guix/scripts/home/edit.scm
@@ -0,0 +1,66 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix scripts home edit)
+  #:use-module (guix diagnostics)
+  #:use-module (guix i18n)
+  #:use-module (guix ui)
+  #:autoload   (guix utils) (string-closest)
+  #:use-module (gnu services)
+  #:use-module (gnu home services)
+  #:use-module (srfi srfi-1)
+  #:use-module (ice-9 match)
+  #:autoload   (guix scripts edit) (spawn-editor)
+  #:export (guix-home-edit))
+
+(define (service-type-not-found type)
+  "Report an error about @var{type} not being found and exit."
+  (report-error (G_ "~a: no such service type~%") type)
+
+  (let* ((type      (symbol->string type))
+         (available (fold-home-service-types (lambda (type lst)
+                                               (cons (symbol->string
+                                                      (service-type-name type))
+                                                     lst))
+                                             '()))
+         (closest   (string-closest type available)))
+    (unless (or (not closest) (string=? closest type))
+      (display-hint (format #f (G_ "Did you mean @code{~a}?~%")
+                            closest))))
+
+  (exit 1))
+
+
+(define (guix-home-edit . args)
+  (when (null? args)
+    (leave (G_ "no service types specified, nothing to edit~%")))
+
+  (with-error-handling
+    (let* ((types (append-map (lambda (type)
+                                (let ((type (string->symbol type)))
+                                  (match (lookup-home-service-types type)
+                                    (() (service-type-not-found type))
+                                    ((one) (list one))
+                                    (lst
+                                     (warning (N_ "~a: ~a matching service type~%"
+                                                  "~a: ~a matching service types~%"
+                                                  (length lst))
+                                              type (length lst))
+                                     lst))))
+                              args)))
+      (spawn-editor (filter-map service-type-location types)))))