[bug#42226] [PATCH] gnu: Add emacs-chess.

[Michael Rohleder <mike@rohleder.de>]

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From 4da0fa92cb532cf25a0a3fdf9d1369e61b1fa883 Mon Sep 17 00:00:00 2001
From: Michael Rohleder <mike@rohleder.de>
Date: Mon, 6 Jul 2020 11:43:34 +0200
Subject: [PATCH] gnu: Add emacs-chess.

* gnu/packages/emacs-xyz.scm (emacs-chess): New variable.
---
 gnu/packages/emacs-xyz.scm | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/gnu/packages/emacs-xyz.scm b/gnu/packages/emacs-xyz.scm
index 2fdda96b45..1c5ebb0740 100644
--- a/gnu/packages/emacs-xyz.scm
+++ b/gnu/packages/emacs-xyz.scm
@@ -5905,6 +5905,39 @@ The goal of this game is to create a tile with value 2048.  The size of the
 board and goal value can be customized.")
     (license license:gpl3+)))
 
+(define-public emacs-chess
+  (package
+    (name "emacs-chess")
+    (version "2.0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://elpa.gnu.org/packages/chess-"
+             version ".tar"))
+       (sha256
+        (base32
+         "1sq1bjmp513vldfh7hc2bbfc54665abqiz0kqgqq3gijckaxn5js"))))
+    (build-system emacs-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'install 'install-pieces
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (site-lisp
+                     (string-append
+                      out "/share/emacs/site-lisp/pieces")))
+               (mkdir-p site-lisp)
+               (copy-recursively "pieces" site-lisp)
+               #t))))))
+    (home-page "https://elpa.gnu.org/packages/chess.html")
+    (synopsis "Play chess in GNU Emacs")
+    (description "chess.el is an Emacs Lisp library and several
+clients on top of the underlying library functionality for performing
+various activities related to the game of chess.")
+    (license license:gpl3+)))
+
 (define-public emacs-4clojure
   ;; There is no release.  Base version is extracted from Version keyword in
   ;; the main file.
-- 
2.27.0


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