From 366a120a394d7783bf1640037ade31f826ef0277 Mon Sep 17 00:00:00 2001
From: MT <mtekman89@gmail.com>
Date: Wed, 10 May 2023 17:41:37 +0200
Subject: [PATCH 2/3] * lisp/ob-core.el (org-babel-merge-params): Tangle header
 with exclusive parameters can now be parsed, following the template of
 :exports and :results

---
 lisp/ob-core.el | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index 013a37ce5..ed31a9de1 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -2803,6 +2803,9 @@ parameters when merging lists."
 	 (exports-exclusive-groups
 	  (mapcar (lambda (group) (mapcar #'symbol-name group))
 		  (cdr (assq 'exports org-babel-common-header-args-w-values))))
+         (tangle-exclusive-groups
+	  (mapcar (lambda (group) (mapcar #'symbol-name group))
+		  (cdr (assq 'tangle org-babel-common-header-args-w-values))))
 	 (merge
 	  (lambda (exclusive-groups &rest result-params)
 	    ;; Maintain exclusivity of mutually exclusive parameters,
@@ -2822,7 +2825,7 @@ parameters when merging lists."
 	 params				;Final parameters list.
 	 ;; Some keywords accept multiple values.  We need to treat
 	 ;; them specially.
-	 vars results exports)
+	 vars results exports tangle)
     (dolist (plist plists)
       (dolist (pair plist)
 	(pcase pair
@@ -2873,6 +2876,12 @@ parameters when merging lists."
                                    (cond ((and value (functionp value)) (funcall value))
                                          (value value)
                                          (t ""))))))
+          (`(:tangle . ,value)
+           (setq tangle (funcall merge
+                                 tangle-exclusive-groups
+                                 tangle
+                                 (split-string
+                                  (or value "")))))
           ((or '(:dir . attach) '(:dir . "'attach"))
            (unless (org-attach-dir nil t)
              (error "No attachment directory for element (add :ID: or :DIR: property)"))
@@ -2898,7 +2907,8 @@ parameters when merging lists."
 			      params)))))
     ;; Handle other special keywords, which accept multiple values.
     (setq params (nconc (list (cons :results (mapconcat #'identity results " "))
-			      (cons :exports (mapconcat #'identity exports " ")))
+			      (cons :exports (mapconcat #'identity exports " "))
+                              (cons :tangle (mapconcat #'identity tangle " ")))
 			params))
     ;; Return merged params.
     (org-babel-eval-headers params)))
-- 
2.40.1