DONE new reference syntax *inside* source code blocks

  noweb style references are now expanded on tangle

lisp/org-babel-tangle.el

@@ -132,7 +132,7 @@ code blocks by language."
                                       (format "block-%d" block-counter))))
              (info (org-babel-get-src-block-info))
              (src-lang (first info))
-             (body (second info))
+             (body (org-babel-expand-noweb-references info))
              (params (third info))
              (spec (list link source-name params body))
              by-lang)
@@ -176,35 +176,34 @@ comment) .
 
 This function must be called from inside of the buffer containing
 the source-code block which holds BODY."
-  (interactive)
   (let* ((parent-buffer (or parent-buffer (current-buffer)))
          (info (or info (org-babel-get-src-block-info)))
          (lang (first info))
          (body (second info))
          (new-body "") index source-name)
-    (with-temp-buffer
-      (insert body) (goto-char (point-min))
-      (funcall (intern (concat lang "-mode")))
-      (setq index (point))
-      (while (and (re-search-forward "<<\\(.+\\)>>" nil t)
-                  (save-match-data (comment-beginning)))
-        (save-match-data (setf source-name (match-string 1)))
-        ;; add interval to new-body
-        (goto-char (match-end 0))
-        (setq new-body (concat new-body (buffer-substring index (point))))
+    (flet ((nb-add (text)
+                   (setq new-body (concat new-body text))))
+      (with-temp-buffer
+        (insert body) (goto-char (point-min))
+        (funcall (intern (concat lang "-mode")))
         (setq index (point))
-        ;; if found, add body of referenced source-block
-        (setq new-body
-              (concat new-body
-                      (save-excursion
-                        (set-buffer parent-buffer)
-                        (let ((point (org-babel-find-named-block source-name)))
-                          (if point
-                              (save-excursion
-                                (goto-char point)
-                                (concat "\n" (second (org-babel-get-src-block-info))))
-                            ""))))))
-      (setq new-body (concat new-body (buffer-substring index (point-max)))))
+        (while (and (re-search-forward "<<\\(.+\\)>>" nil t)
+                    (save-match-data (comment-beginning)))
+          (save-match-data (setf source-name (match-string 1)))
+          ;; add interval to new-body
+          (goto-char (match-end 0))
+          (nb-add (buffer-substring index (point)))
+          (setq index (point))
+          ;; if found, add body of referenced source-block
+          (nb-add (save-excursion
+                    (set-buffer parent-buffer)
+                    (let ((point (org-babel-find-named-block source-name)))
+                      (if point
+                          (save-excursion
+                            (goto-char point)
+                            (concat "\n" (second (org-babel-get-src-block-info))))
+                        "")))))
+        (nb-add (buffer-substring index (point-max)))))
     new-body))
 
 (provide 'org-babel-tangle)

org-babel.org

@@ -207,39 +207,7 @@ would then be [[#sandbox][the sandbox]].
 #+end_src
 
   
-* Tasks [39/61]
-** STARTED new reference syntax *inside* source code blocks
-This is from an email discussion on the org-mode mailing list with
-Sébastien.  The goal here is to mimic the source-block reference style
-of Noweb.  Upon export and/or tangle these references could be
-replaced with the actual body of the referenced source-code block.
-
-See the following for an example.
-
-#+srcname: ems-ruby-print-header
-#+begin_src ruby 
-puts "---------------------------header---------------------------"
-#+end_src
-
-#+srcname: emacs-ruby-print-footer
-#+begin_src ruby 
-puts "---------------------------footer---------------------------"
-#+end_src
-
-#+srcname: ems-ruby-print-message
-#+begin_src ruby :file ruby-noweb.rb
-  # <<ems-ruby-print-header>>
-  puts "                            Ruby                            "
-  # <<ems-ruby-print-footer>>
-#+end_src
-
-Upon export the previous source-code block would result in a file
-being generated at =ruby-noweb.rb= with the following contents
-
-: puts "---------------------------header---------------------------"
-: puts "                            Ruby                            "
-: puts "---------------------------footer---------------------------"
-
+* Tasks [40/61]
 ** PROPOSED raise elisp error when source-blocks return errors
 Not sure how/if this would work, but it may be desirable.
 
@@ -1172,6 +1140,42 @@ to the command if BUFF is not given.)
     2) The function is called inside of a =write.table= function call
        writing the results to a table
     3) The table is read using =org-table-import=
+** DONE new reference syntax *inside* source code blocks
+This is from an email discussion on the org-mode mailing list with
+Sébastien.  The goal here is to mimic the source-block reference style
+of Noweb.  Upon export and/or tangle these references could be
+replaced with the actual body of the referenced source-code block.
+
+See the following for an example.
+
+#+srcname: ems-ruby-print-header
+#+begin_src ruby 
+puts "---------------------------header---------------------------"
+#+end_src
+
+#+srcname: emacs-ruby-print-footer
+#+begin_src ruby 
+puts "---------------------------footer---------------------------"
+#+end_src
+
+#+srcname: ems-ruby-print-message
+#+begin_src ruby :file ruby-noweb.rb
+  # <<ems-ruby-print-header>>
+  puts "                            Ruby                            "
+  # <<ems-ruby-print-footer>>
+#+end_src
+
+Upon export the previous source-code block would result in a file
+being generated at =ruby-noweb.rb= with the following contents
+
+: puts "---------------------------header---------------------------"
+: puts "                            Ruby                            "
+: puts "---------------------------footer---------------------------"
+
+the body of a source-code block with all =<<src-name>>= references
+expanded can now be returned by `org-babel-expand-noweb-references'.
+This function is now called by default on all source-code blocks on
+export.
 
 ** DONE re-work tangling system
 Sometimes when tangling a file (e.g. when extracting elisp from a

test-tangle.org

@@ -13,7 +13,7 @@ echo "line 2"
 more text
 
 #+srcname: ruby-no-session
-#+begin_src ruby :tangle yes
+#+begin_src ruby
   def hello
     puts "hello world"
   end
@@ -25,7 +25,7 @@ more text
 #+end_src
 
 #+srcname: ruby-with-noweb-references
-#+begin_src ruby 
+#+begin_src ruby :tangle yes
   # <<ruby-no-session>>
   hello()
 #+end_src