gnu: gcal: Move from (gnu packages gcal) to (gnu packages calendar).

gcal is a leaf package, and the only one kept at gnu/packages/gcal.scm.
There is no special reason to keep it in a dedicated file.

* gnu/local.mk: Remove reference to packages/gcal.scm.
* gnu/packages/gcal.scm (gcal): Move from here ...
* gnu/packages/calendar.scm: ... to here.
  Update copyright headers via merge.
* po/packages/POTFILES.in: Remove reference to gnu/packages/gcal.scm.

Change-Id: I196ce61ebb4caa683b97483f6ea1d6e505f05af7
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

4 files changed, 51 insertions, 79 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index d57918171a4..e3964f85abb 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -305,7 +305,6 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/game-development.scm		\
   %D%/packages/games.scm			\
   %D%/packages/gawk.scm				\
-  %D%/packages/gcal.scm				\
   %D%/packages/gcc.scm				\
   %D%/packages/gd.scm				\
   %D%/packages/gdb.scm				\
diff --git a/gnu/packages/calendar.scm b/gnu/packages/calendar.scm
index c4bb6bd5d4e..4430fe4a56b 100644
--- a/gnu/packages/calendar.scm
+++ b/gnu/packages/calendar.scm
@@ -1,4 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2015, 2016, 2017 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2016 Kei Kebreau <kkebreau@posteo.net>
@@ -16,6 +17,7 @@
 ;;; Copyright © 2025 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
 ;;; Copyright © 2025 Sharlatan Hellseher <sharlatanus@gmail.com>
 ;;; Copyright © 2025 Ashish SHUKLA <ashish.is@lostca.se>
+;;; Copyright © 2025 Andy Tai <atai@atai.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -488,6 +490,55 @@ traditional Chinese characters.")
     ;; 'Lesser GPL version 2 or later'.
     (license (list license:gpl2+ license:lgpl2.1+))))
 
+(define-public gcal
+  (package
+    (name "gcal")
+    (version "4.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://www.alteholz.dev/gnu/gcal-"
+                           version ".tar.xz"))
+       (sha256
+        (base32
+         "1p3q6his31bxs24nsgpfavw3nlhalqf0zak4f3b530p725s2vgfq"))
+       (snippet
+        #~(begin
+            (use-modules (guix build utils))
+            ;; Adjust the bundled gnulib to work with glibc 2.28.  See e.g.
+            ;; "m4-gnulib-libio.patch".  This is a phase rather than patch
+            ;; or snippet to work around <https://bugs.gnu.org/32347>.
+            (substitute* (find-files "lib" "\\.c$")
+              (("#if defined _IO_ftrylockfile")
+               "#if defined _IO_EOF_SEEN"))
+            (substitute* "lib/stdio-impl.h"
+              (("^/\\* BSD stdio derived implementations")
+               (string-append
+                "#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN\n"
+                "# define _IO_IN_BACKUP 0x100\n"
+                "#endif\n\n"
+                "/* BSD stdio derived implementations")))
+            #t))))
+    (build-system gnu-build-system)
+    (arguments
+     (list
+      #:configure-flags
+      #~(list "LDFLAGS=-lm")))
+    (native-inputs
+     (list check
+           pkg-config))
+    (home-page "https://www.gnu.org/software/gcal/")
+    (synopsis "Calculating and printing a wide variety of calendars")
+    (description
+     "Gcal is a program to calculate and print calendars on the
+command-line.  Calendars can be printed in 1-month, 3-month or whole-year
+views.  In addition, eternal holiday lists can be generated for many
+countries, which can be complemented by user-made lists of fixed dates to
+make an agenda.  Gcal can also calculate astronomical data, such as the
+phases of the moon, and supports alternative calendar formats: Julian,
+Gregorian, Islamic, Chinese and more.")
+    (license license:gpl3+)))
+
 (define-public gsimplecal
   (let ((version "2.4.1"))
     (package
diff --git a/gnu/packages/gcal.scm b/gnu/packages/gcal.scm
deleted file mode 100644
index 099a21c0833..00000000000
--- a/gnu/packages/gcal.scm
+++ /dev/null
@@ -1,77 +0,0 @@
-;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2018 Ludovic Courtès <ludo@gnu.org>
-;;; Copyright © 2025 Andy Tai <atai@atai.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 (gnu packages gcal)
-  #:use-module ((guix licenses) #:prefix license:)
-  #:use-module (gnu packages check)
-  #:use-module (gnu packages pkg-config)
-  #:use-module (guix build-system gnu)
-  #:use-module (guix download)
-  #:use-module (guix gexp)
-  #:use-module (guix packages))
-
-
-(define-public gcal
-  (package
-    (name "gcal")
-    (version "4.2.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append "https://www.alteholz.dev/gnu/gcal-"
-                           version ".tar.xz"))
-       (sha256
-        (base32
-         "1p3q6his31bxs24nsgpfavw3nlhalqf0zak4f3b530p725s2vgfq"))
-       (snippet
-        #~(begin
-            (use-modules (guix build utils))
-            ;; Adjust the bundled gnulib to work with glibc 2.28.  See e.g.
-            ;; "m4-gnulib-libio.patch".  This is a phase rather than patch
-            ;; or snippet to work around <https://bugs.gnu.org/32347>.
-            (substitute* (find-files "lib" "\\.c$")
-              (("#if defined _IO_ftrylockfile")
-               "#if defined _IO_EOF_SEEN"))
-            (substitute* "lib/stdio-impl.h"
-              (("^/\\* BSD stdio derived implementations")
-               (string-append
-                "#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN\n"
-                "# define _IO_IN_BACKUP 0x100\n"
-                "#endif\n\n"
-                "/* BSD stdio derived implementations")))
-            #t))))
-    (build-system gnu-build-system)
-    (arguments
-     (list
-      #:configure-flags
-      #~(list "LDFLAGS=-lm")))
-    (native-inputs
-     (list check
-           pkg-config))
-    (home-page "https://www.gnu.org/software/gcal/")
-    (synopsis "Calculating and printing a wide variety of calendars")
-    (description
-     "Gcal is a program to calculate and print calendars on the
-command-line.  Calendars can be printed in 1-month, 3-month or whole-year
-views.  In addition, eternal holiday lists can be generated for many
-countries, which can be complemented by user-made lists of fixed dates to
-make an agenda.  Gcal can also calculate astronomical data, such as the
-phases of the moon, and supports alternative calendar formats: Julian,
-Gregorian, Islamic, Chinese and more.")
-    (license license:gpl3+)))
diff --git a/po/packages/POTFILES.in b/po/packages/POTFILES.in
index 7dcdea1f665..1c8945edfcf 100644
--- a/po/packages/POTFILES.in
+++ b/po/packages/POTFILES.in
@@ -358,7 +358,6 @@ gnu/packages/valgrind.scm
 gnu/packages/vim.scm
 gnu/packages/vpn.scm
 gnu/packages/game-development.scm
-gnu/packages/gcal.scm
 gnu/packages/genealogy.scm
 gnu/packages/geo.scm
 gnu/packages/ghostscript.scm