[PATCH] ob-core: do not ask for confirmation if cached value is current

[Achim Gratz <Stromeko@nexgo.de>]

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Babel asks for confirmation to evaluate a source block even when it is
going to use the cached value.  This patch skips the superfluous
confirmation in that case (no evaluation takes place, the cached value
is used).


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From da687f5a40767921c7f3f309eeda0cadb09f7116 Mon Sep 17 00:00:00 2001
From: Achim Gratz <Stromeko@Stromeko.DE>
Date: Tue, 26 Feb 2013 21:23:37 +0100
Subject: [PATCH] ob-core:  do not ask for confirmation if cached value is
 current
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* lisp/ob-core.el (org-babel-execute-src-block): Do not run
  `org-babel-confirm-evaluate´ if source block has a cache and the
  cache value is current (there is no evaluation involved in this
  case).
---
 lisp/ob-core.el | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index 3278bf9..573fa20 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -521,21 +521,23 @@ (defun org-babel-execute-src-block (&optional arg info params)
 the header arguments specified at the front of the source code
 block."
   (interactive)
-  (let ((info (or info (org-babel-get-src-block-info))))
-    (when (org-babel-confirm-evaluate
-	   (let ((i info))
-	     (setf (nth 2 i) (org-babel-merge-params (nth 2 info) params))
-	     i))
+  (let* ((info (or info (org-babel-get-src-block-info)))
+	 (params (if params
+		     (org-babel-process-params
+		      (org-babel-merge-params (nth 2 info) params))
+		   (nth 2 info)))
+	 (cache? (and (not arg) (cdr (assoc :cache params))
+		      (string= "yes" (cdr (assoc :cache params)))))
+	 (new-hash (when cache? (org-babel-sha1-hash info)))
+	 (old-hash (when cache? (org-babel-current-result-hash)))
+	 (cache-current? (and (not arg) new-hash (equal new-hash old-hash))))
+    (when (or cache-current?
+	      (org-babel-confirm-evaluate
+	       (let ((i info))
+		 (setf (nth 2 i) (org-babel-merge-params (nth 2 info) params))
+		 i)))
       (let* ((lang (nth 0 info))
-	     (params (if params
-			 (org-babel-process-params
-			  (org-babel-merge-params (nth 2 info) params))
-		       (nth 2 info)))
-	     (cache? (and (not arg) (cdr (assoc :cache params))
-			  (string= "yes" (cdr (assoc :cache params)))))
 	     (result-params (cdr (assoc :result-params params)))
-	     (new-hash (when cache? (org-babel-sha1-hash info)))
-	     (old-hash (when cache? (org-babel-current-result-hash)))
 	     (body (setf (nth 1 info)
 			 (if (org-babel-noweb-p params :eval)
 			     (org-babel-expand-noweb-references info)
@@ -562,7 +564,7 @@ (defun org-babel-execute-src-block (&optional arg info params)
 			  (funcall lang-check (symbol-name
 					       (cdr (assoc lang org-src-lang-modes))))
 			  (error "No org-babel-execute function for %s!" lang))))
-	      (if (and (not arg) new-hash (equal new-hash old-hash))
+	      (if cache-current?
 		  (save-excursion ;; return cached result
 		    (goto-char (org-babel-where-is-src-block-result nil info))
 		    (end-of-line 1) (forward-char 1)
-- 
1.8.1.4


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Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

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