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;;; ob-clojure.el --- org-babel functions for clojure evaluation

;; Copyright (C) 2009, 2010  Free Software Foundation, Inc.

;; Author: Joel Boehland, Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; Version: 7.5

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;; support for evaluating clojure code, relies on slime for all eval

;;; Requirements:

;;; - clojure (at least 1.2.0)
;;; - clojure-mode
;;; - slime
;;; - swank-clojure

;;; By far, the best way to install these components is by following
;;; the directions as set out by Phil Hagelberg (Technomancy) on the
;;; web page: http://technomancy.us/126

;;; Code:
(require 'ob)

(declare-function slime-eval "ext:slime" (sexp &optional package))

(add-to-list 'org-babel-tangle-lang-exts '("clojure" . "clj"))

(defvar org-babel-default-header-args:clojure '())
(defvar org-babel-header-arg-names:clojure '(package))

(defun org-babel-expand-body:clojure (body params)
  "Expand BODY according to PARAMS, return the expanded body."
  (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
	(print-level nil) (print-length nil))
    (org-babel-trim
     (if (> (length vars) 0)
	 (concat "(let ["
		 (mapconcat
		  (lambda (var)
		    (format "%S (quote %S)" (car var) (cdr var)))
		  vars "\n      ")
		 "]\n" body ")")
       body))))

(defun org-babel-execute:clojure (body params)
  "Execute a block of Clojure code with Babel."
  (require 'slime) (require 'swank-clojure)
  (let ((result-params (cdr (assoc :result-params params)))
	(body (org-babel-expand-body:clojure body params)))
    (with-temp-buffer
      (insert
       (if (or (member "code" result-params)
	       (member "pp" result-params))
	   (format
	    (concat
	     "(let [org-mode-print-catcher (java.io.StringWriter.)] "
	     "(clojure.pprint/with-pprint-dispatch clojure.pprint/%s-dispatch "
	     "(clojure.pprint/pprint (do %s) org-mode-print-catcher) "
	     "(str org-mode-print-catcher)))")
	    (if (member "code" result-params) "code" "simple") body)
	 body))
      ((lambda (result)
	 (if (or (member "scalar" result-params)
		 (member "verbatim" result-params))
	     result
	   (condition-case nil (read result) (error result))))
       (slime-eval
	`(swank:interactive-eval-region
	  ,(buffer-substring-no-properties (point-min) (point-max)))
	(cdr (assoc :package params)))))))

(provide 'ob-clojure)

;; arch-tag: a43b33f2-653e-46b1-ac56-2805cf05b7d1

;;; ob-clojure.el ends here
debug log:

solving 35e3bd7 ...
found 35e3bd7 in https://list.orgmode.org/orgmode/87k4cfjbyx.fsf@gmail.com/
found cc6c2de in https://git.savannah.gnu.org/cgit/emacs/org-mode.git
preparing index
index prepared:
100644 cc6c2de567f0cfb458a9179a37f1e4a5ebc3e7bb	lisp/ob-clojure.el

applying [1/1] https://list.orgmode.org/orgmode/87k4cfjbyx.fsf@gmail.com/
diff --git a/lisp/ob-clojure.el b/lisp/ob-clojure.el
index cc6c2de..35e3bd7 100644

Checking patch lisp/ob-clojure.el...
Applied patch lisp/ob-clojure.el cleanly.

index at:
100644 35e3bd75c96dd9432fe0636a4e1ce022ef867d5d	lisp/ob-clojure.el

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