1 files changed, 93 insertions, 13 deletions

diff --git a/lisp/org/ob-clojure.el b/lisp/org/ob-clojure.el
index b99035b4cce..b49bfe58898 100644
--- a/lisp/org/ob-clojure.el
+++ b/lisp/org/ob-clojure.el
@@ -2,7 +2,7 @@
 
 ;; Copyright (C) 2009-2017 Free Software Foundation, Inc.
 
-;; Author: Joel Boehland, Eric Schulte, Oleh Krehel
+;; Author: Joel Boehland, Eric Schulte, Oleh Krehel, Frederick Giasson
 ;;
 ;; Keywords: literate programming, reproducible research
 ;; Homepage: http://orgmode.org
@@ -43,19 +43,34 @@
 (require 'ob)
 
 (declare-function cider-current-connection "ext:cider-client" (&optional type))
-(declare-function cider-current-session "ext:cider-client" ())
+(declare-function cider-current-ns "ext:cider-client" ())
+(declare-function nrepl--merge "ext:nrepl-client" (dict1 dict2))
 (declare-function nrepl-dict-get "ext:nrepl-client" (dict key))
+(declare-function nrepl-dict-put "ext:nrepl-client" (dict key value))
+(declare-function nrepl-request:eval "ext:nrepl-client"
+                  (input callback connection &optional session ns line column additional-params))
 (declare-function nrepl-sync-request:eval "ext:nrepl-client"
                   (input connection session &optional ns))
 (declare-function org-trim "org" (s &optional keep-lead))
 (declare-function slime-eval "ext:slime" (sexp &optional package))
 
+(defvar nrepl-sync-request-timeout)
+
 (defvar org-babel-tangle-lang-exts)
 (add-to-list 'org-babel-tangle-lang-exts '("clojure" . "clj"))
 
 (defvar org-babel-default-header-args:clojure '())
 (defvar org-babel-header-args:clojure '((package . :any)))
 
+(defcustom org-babel-clojure-sync-nrepl-timeout 10
+  "Timeout value, in seconds, of a Clojure sync call.
+If the value is nil, timeout is disabled."
+  :group 'org-babel
+  :type 'integer
+  :version "26.1"
+  :package-version '(Org . "9.1")
+  :safe #'wholenump)
+
 (defcustom org-babel-clojure-backend
   (cond ((featurep 'cider) 'cider)
         (t 'slime))
@@ -84,21 +99,86 @@
       body)))
 
 (defun org-babel-execute:clojure (body params)
-  "Execute a block of Clojure code with Babel."
+  "Execute a block of Clojure code with Babel.
+The underlying process performed by the code block can be output
+using the :show-process parameter."
   (let ((expanded (org-babel-expand-body:clojure body params))
-        result)
+        (response (list 'dict))
+        result)
     (cl-case org-babel-clojure-backend
       (cider
        (require 'cider)
-       (let ((result-params (cdr (assq :result-params params))))
-         (setq result
-               (nrepl-dict-get
-                (nrepl-sync-request:eval
-                 expanded (cider-current-connection) (cider-current-session))
-                (if (or (member "output" result-params)
-                        (member "pp" result-params))
-                    "out"
-                  "value")))))
+       (let ((result-params (cdr (assq :result-params params)))
+             (show (cdr (assq :show-process params))))
+         (if (member show '(nil "no"))
+             ;; Run code without showing the process.
+             (progn
+               (setq response
+                     (let ((nrepl-sync-request-timeout
+                            org-babel-clojure-sync-nrepl-timeout))
+                       (nrepl-sync-request:eval expanded
+                                                (cider-current-connection)
+                                                (cider-current-ns))))
+               (setq result
+                     (concat
+                      (nrepl-dict-get response
+                                      (if (or (member "output" result-params)
+                                              (member "pp" result-params))
+                                          "out"
+                                        "value"))
+                      (nrepl-dict-get response "ex")
+                      (nrepl-dict-get response "root-ex")
+                      (nrepl-dict-get response "err"))))
+           ;; Show the process in an output buffer/window.
+           (let ((process-buffer (switch-to-buffer-other-window
+                                  "*Clojure Show Process Sub Buffer*"))
+                 status)
+             ;; Run the Clojure code in nREPL.
+             (nrepl-request:eval
+              expanded
+              (lambda (resp)
+                (when (member "out" resp)
+                  ;; Print the output of the nREPL in the output buffer.
+                  (princ (nrepl-dict-get resp "out") process-buffer))
+                (when (member "ex" resp)
+                  ;; In case there is an exception, then add it to the
+                  ;; output buffer as well.
+                  (princ (nrepl-dict-get resp "ex") process-buffer)
+                  (princ (nrepl-dict-get resp "root-ex") process-buffer))
+                (when (member "err" resp)
+                  ;; In case there is an error, then add it to the
+                  ;; output buffer as well.
+                  (princ (nrepl-dict-get resp "err") process-buffer))
+                (nrepl--merge response resp)
+                ;; Update the status of the nREPL output session.
+                (setq status (nrepl-dict-get response "status")))
+              (cider-current-connection)
+              (cider-current-ns))
+
+             ;; Wait until the nREPL code finished to be processed.
+             (while (not (member "done" status))
+               (nrepl-dict-put response "status" (remove "need-input" status))
+               (accept-process-output nil 0.01)
+               (redisplay))
+
+             ;; Delete the show buffer & window when the processing is
+             ;; finalized.
+             (mapc #'delete-window
+                   (get-buffer-window-list process-buffer nil t))
+             (kill-buffer process-buffer)
+
+             ;; Put the output or the value in the result section of
+             ;; the code block.
+             (setq result
+                   (concat
+                    (nrepl-dict-get response
+                                    (if (or (member "output" result-params)
+                                            (member "pp" result-params))
+                                        "out"
+                                      "value"))
+                    (nrepl-dict-get response "ex")
+                    (nrepl-dict-get response "root-ex")
+                    (nrepl-dict-get response "err")))))))
       (slime
        (require 'slime)
        (with-temp-buffer