[bug#40149] [PATCH 2/5] ui: Add 'indented-string'.

["Ludovic Courtès" <ludo@gnu.org>]

* guix/scripts/pull.scm (display-news-entry): Remove extra space in
format string for 'indented-string'.
(indented-string): Remove.
(display-new/upgraded-packages)[pretty]: Pass #:initial-indent? to
'indented-string'.
* guix/ui.scm (indented-string): New procedure.
---
 guix/scripts/pull.scm | 17 ++---------------
 guix/ui.scm           | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/guix/scripts/pull.scm b/guix/scripts/pull.scm
index 51d4da209a..1db5ab7237 100644
--- a/guix/scripts/pull.scm
+++ b/guix/scripts/pull.scm
@@ -269,7 +269,7 @@ code, to PORT."
   (let ((body (or (assoc-ref body language)
                   (assoc-ref body (%default-message-language))
                   "")))
-    (format port "    ~a~%"
+    (format port "~a~%"
             (indented-string
              (parameterize ((%text-width (- (%text-width) 4)))
                (string-trim-right
@@ -523,19 +523,6 @@ true, display what would be built without actually building it."
 ;;; Queries.
 ;;;
 
-(define (indented-string str indent)
-  "Return STR with each newline preceded by IDENT spaces."
-  (define indent-string
-    (make-list indent #\space))
-
-  (list->string
-   (string-fold-right (lambda (chr result)
-                        (if (eqv? chr #\newline)
-                            (cons chr (append indent-string result))
-                            (cons chr result)))
-                      '()
-                      str)))
-
 (define profile-package-alist
   (mlambda (profile)
     "Return a name/version alist representing the packages in PROFILE."
@@ -592,7 +579,7 @@ Return true when there is more package info to display."
   (define (pretty str column)
     (indented-string (fill-paragraph str (- (%text-width) 4)
                                      column)
-                     4))
+                     4 #:initial-indent? #f))
 
   (define concise/max-item-count
     ;; Maximum number of items to display when CONCISE? is true.
diff --git a/guix/ui.scm b/guix/ui.scm
index 6f1ca9c0b2..698111dd9a 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -103,6 +103,7 @@
             read/eval
             read/eval-package-expression
             check-available-space
+            indented-string
             fill-paragraph
             %text-width
             texi->plain-text
@@ -1163,6 +1164,23 @@ replacement if PORT is not Unicode-capable."
       (lambda ()
         body ...)))))
 
+(define* (indented-string str indent
+                          #:key (initial-indent? #t))
+  "Return STR with each newline preceded by IDENT spaces.  When
+INITIAL-INDENT? is true, the first line is also indented."
+  (define indent-string
+    (make-list indent #\space))
+
+  (list->string
+   (string-fold-right (lambda (chr result)
+                        (if (eqv? chr #\newline)
+                            (cons chr (append indent-string result))
+                            (cons chr result)))
+                      '()
+                      (if initial-indent?
+                          (string-append (list->string indent-string) str)
+                          str))))
+
 (define* (fill-paragraph str width #:optional (column 0))
   "Fill STR such that each line contains at most WIDTH characters, assuming
 that the first character is at COLUMN.
-- 
2.25.1