implemented infrastructure for loading source-blocks from files

library-of-babel.org

@@ -11,24 +11,13 @@
 (maphash (lambda (key val) (insert key)) lob)
 
 
-
-* One Liner
-  Here's a different type of syntax that may work.
-
-  This uses one-liners of the form
-
-: #+lob:source-block-name variables
-
-  This takes advantage of the functionality already present in
-  [[file:lisp/org-babel-ref.el][org-babel-ref]] for resolving references to other source blocks which
-  may contain variable specifications.  See the bottom half of
-  [[file:lisp/org-babel-lob.el][org-babel-lob]] for the new implementation.  To test it out load
-  org-babel-lob and press =C-cC-c= on the =#+lob:= line further down.
+* Plotting code
+  Plot column 2 (y axis) against column 1 (x axis). Columns 3 and beyond, if present, are ignored.
 
 #+resname: R-plot-default-data
 | 0 | 0 |
 
-#+srcname: my-R-plot
+#+srcname: R-plot
 #+begin_src R :results silent :var data=R-plot-default-data
 plot(data)
 #+end_src
@@ -40,56 +29,4 @@ plot(data)
 | 4 | 16 |
 | 5 | 25 |
 
-#+lob:my-R-plot data=example-R-plot-data
-
-* Plotting code
-  Plot column 2 (y axis) against column 1 (x axis). Columns 3 and beyond, if present, are ignored.
-
-#+resname: R-plot-default-data
-| 0 | 0 |
-
-#+srcname: R-plot
-#+begin_src R :results silent :var data=R-plot-default-data
-plot(data)
-#+end_src
-
-#+begin_src babel :srcname plot :var data=10
-#+end_src
-
-#+srcname: plot
-#+begin_src R
-plot(__data__)
-#+end_src
-
-
-
-
-
-#+srcname: plot
-#+begin_src R
-plot(__data__)
-#+end_src
-
-#+resname: plot
-: org_babel_R_eoe
-: org_babel_R_eoe
-
-
-
-
-
-
-
-
-
-
-
-
-#+begin_src R
-79
-#+end_src
-
-#+resname:
-: 79
-: 78
-: 77
+#+lob:R-plot data=example-R-plot-data

lisp/org-babel-lob.el

@@ -30,40 +30,34 @@
 
 ;;; Code:
 (require 'org-babel)
-
-(org-babel-add-interpreter "babel")
-
-(setq org-babel-library-of-babel
-      (progn (set-buffer
-	      (find-file-noselect "../library-of-babel.org"))
-	     (org-babel-get-all-src-block-infos)))
-
-(defun org-babel-execute:babel (body params)
-  "Execute a library-of-babel block.
-
-  These blocks do not have their own body. Instead they use
-  a :srcname header argument to reference a different source
-  block, whose body they use. Source blocks in the library of
-  babel should use a standard naming scheme for the variable
-  containing the input data for analysis / plotting. E.g. if that
-  variable is always called __data__ then one of these bodyless
-  babel blocks will call a library of babel block using :var
-  __data__=<some reference>. The header args from a babel block
-  are appended to the header args from the target block.
-
-  This function is called by `org-babel-execute-src-block'."
-  (message "executing babel source code block...")
-  (save-window-excursion
-    (let* ((srcname (cdr (assoc :srcname params)))
-	   (info (or (save-excursion
-		       (goto-char (org-babel-find-named-block srcname))
-		       (org-babel-get-src-block-info))
-		     (gethash srcname org-babel-library-of-babel))))
-      (org-babel-execute-src-block nil info params))))
-
-;; alternate 1-liner syntax, this uses `seb' from org-babel-table.el
 (require 'org-babel-table)
 
+(defvar org-babel-library-of-babel nil
+  "Library of source-code blocks.  This is an association list.
+Populate the library by adding files to `org-babel-lob-files'.")
+
+(defcustom org-babel-lob-files '()
+  "Files used to populate the `org-babel-library-of-babel'.  To
+add files to this list use the `org-babel-lob-ingest' command."
+  :group 'org-babel
+  :type 'list)
+
+(defun org-babel-lob-ingest (&optional file)
+  "Add all source-blocks defined in FILE to `org-babel-library-of-babel'."
+  (interactive "f")
+  (org-babel-map-source-blocks file
+    (let ((source-name (intern (org-babel-get-src-block-name)))
+          (info (org-babel-get-src-block-info)))
+      (setq org-babel-library-of-babel
+            (cons (cons source-name info)
+                  (assq-delete-all source-name org-babel-library-of-babel))))))
+
+(org-babel-lob-ingest ;; actually add the source-blocks defined in library-of-babel.org
+ (expand-file-name "library-of-babel.org"
+                   (expand-file-name ".." (file-name-directory (or load-file-name buffer-file-name)))))
+
+;; functions for executing lob one-liners
+
 (defvar org-babel-lob-one-liner-regexp
   "#\\+lob:\\([^ \t\n\r]+\\)\\([ \t]+\\([^\n]+\\)\\)?\n")
 
@@ -104,7 +98,7 @@ a list of the following form.
                                             (format "%s=%s" (first var-spec) (second var-spec)))
                                           (cdr info) ", ")
                                ")"))))
-    (message "params=%S" params)
     (org-babel-execute-src-block t (list "emacs-lisp" "results" params))))
 
 (provide 'org-babel-lob)
+;;; org-babel-lob.el ends here

lisp/org-babel.el

@@ -186,16 +186,15 @@ of the following form.  (language body header-arguments-alist)"
           (org-babel-parse-inline-src-block-match)
         nil)))) ;; indicate that no source block was found
 
-(defun org-babel-get-all-src-block-infos ()
-  "Get source-code block info for all blocks in buffer."
-  (save-excursion
-    (goto-char (point-min))
-    (let ((blocks (make-hash-table :test 'equal)))
-      (while (re-search-forward
-	      org-babel-named-src-block-regexp nil t)
-	(puthash (match-string-no-properties 1) ;; srcname
-		 (org-babel-get-src-block-info) blocks)
-	blocks))))
+(defmacro org-babel-map-source-blocks (file &rest body)
+  "Evaluate BODY forms on each source-block in FILE."
+  (declare (indent 1))
+  `(save-window-excursion
+     (find-file ,file) (goto-char (point-min))
+     (while (re-search-forward org-babel-src-block-regexp nil t)
+       (goto-char (match-beginning 0))
+       (save-match-data ,@body)
+       (goto-char (match-end 0)))))
 
 (defun org-babel-parse-src-block-match ()
   (list (org-babel-clean-text-properties (match-string 1))