Subject: [bug#39192] [PATCH] gnu: hexedit: Make F1 help more reliable

From: Jakub Kądziołka <[email-masked]>
Date: Sun, 19 Jan 2020 13:44:34 +0100

* gnu/packages/hexedit.scm (hexedit)[arguments](patch-man-path): New
  phase.
  [inputs]: Add MAN-DB.
---
 gnu/packages/hexedit.scm | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/hexedit.scm b/gnu/packages/hexedit.scm
index 39dcb2e0f7..e788c7f766 100644
--- a/gnu/packages/hexedit.scm
+++ b/gnu/packages/hexedit.scm
@@ -24,6 +24,7 @@
   #:use-module (gnu packages)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages man)
   #:use-module (gnu packages ncurses)
   #:use-module (guix download)
   #:use-module (guix git-download)
@@ -43,12 +44,24 @@
                (base32
                 "1xsxa5mip892jkvz9jshj73y6c7j3mgp8y393ciihqlyf2nmfs67"))))
     (build-system gnu-build-system)
-    (arguments '(#:tests? #f))          ; no check target
+    (arguments
+     `(#:tests? #f                      ; no check target
+       #:phases
+       (modify-phases %standard-phases
+         ;; Make F1 open the man page even if man-db is not in the profile
+         (add-after 'unpack 'patch-man-path
+           (lambda _
+             (substitute* "interact.c"
+               (("\"man\"")
+                (string-append "\"" (assoc-ref %build-inputs "man-db") "/bin/man\""))
+               (("\"hexedit\"")
+                (string-append "\"" (assoc-ref %outputs "out") "/share/man/man1/hexedit.1.gz\""))))))))
     (native-inputs
      `(("autoconf" ,autoconf)
        ("automake" ,automake)))
     (inputs
-     `(("ncurses" ,ncurses)))
+     `(("ncurses" ,ncurses)
+       ("man-db" ,man-db)))
     (synopsis "View and edit files or devices in hexadecimal or ASCII")
     (description "hexedit shows a file both in ASCII and in hexadecimal.  The
 file can be a device as the file is read a piece at a time.  You can modify
-- 
2.25.0