Update to Cadabra 2.x (as Cadabra 1.x is no longer supported).

cadabra/progs/init-cadabra2.scm

@@ -0,0 +1,27 @@
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;; MODULE      : cadabra2.scm
+;; DESCRIPTION : Initialize cadabra2 plugin
+;; COPYRIGHT   : (C) 2025 Kasper Peeters
+;;
+;; This software falls under the GNU general public license and comes WITHOUT
+;; ANY WARRANTY WHATSOEVER. See the file $TEXMACS_PATH/LICENSE for details.
+;; If you don't have this file, write to the Free Software Foundation, Inc.,
+;; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+;;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; As in the python plugin, we need a way to make TeXmacs send
+;; multi-line input without stripping newlines.
+
+(define (cadabra-serialize lan t)
+  (with u (pre-serialize lan t)
+    (with s (texmacs->code (stree->tree u) "SourceCode")
+	  (string-append  s  "\n<EOF>\n"))))
+
+(plugin-configure cadabra
+  (:require (url-exists-in-path? "cadabra2"))
+  (:launch "cadabra2 --texmacs")
+  (:serializer ,cadabra-serialize)
+  (:session "Cadabra2"))