lisp/ob-clojure.el

   1 ;;; ob-clojure.el --- org-babel functions for clojure evaluation
   2
   3 ;; Copyright (C) 2009-2012  Free Software Foundation, Inc.
   4
   5 ;; Author: Joel Boehland
   6 ;;      Eric Schulte
   7 ;; Keywords: literate programming, reproducible research
   8 ;; Homepage: http://orgmode.org
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;; support for evaluating clojure code, relies on slime for all eval
  28
  29 ;;; Requirements:
  30
  31 ;;; - clojure (at least 1.2.0)
  32 ;;; - clojure-mode
  33 ;;; - slime
  34
  35 ;;; By far, the best way to install these components is by following
  36 ;;; the directions as set out by Phil Hagelberg (Technomancy) on the
  37 ;;; web page: http://technomancy.us/126
  38
  39 ;;; Code:
  40 (require 'ob)
  41
  42 (declare-function slime-eval "ext:slime" (sexp &optional package))
  43
  44 (defvar org-babel-tangle-lang-exts)
  45 (add-to-list 'org-babel-tangle-lang-exts '("clojure" . "clj"))
  46
  47 (defvar org-babel-default-header-args:clojure '())
  48 (defvar org-babel-header-arg-names:clojure '(package))
  49
  50 (defun org-babel-expand-body:clojure (body params)
  51   "Expand BODY according to PARAMS, return the expanded body."
  52   (let* ((vars (mapcar #'cdr (org-babel-get-header params :var)))
  53          (result-params (cdr (assoc :result-params params)))
  54          (print-level nil) (print-length nil)
  55          (body (org-babel-trim
  56                 (if (> (length vars) 0)
  57                     (concat "(let ["
  58                             (mapconcat
  59                              (lambda (var)
  60                                (format "%S (quote %S)" (car var) (cdr var)))
  61                              vars "\n      ")
  62                             "]\n" body ")")
  63                   body))))
  64     (cond ((or (member "code" result-params) (member "pp" result-params))
  65            (format (concat "(let [org-mode-print-catcher (java.io.StringWriter.)] "
  66                            "(clojure.pprint/with-pprint-dispatch clojure.pprint/%s-dispatch "
  67                            "(clojure.pprint/pprint (do %s) org-mode-print-catcher) "
  68                            "(str org-mode-print-catcher)))")
  69                    (if (member "code" result-params) "code" "simple") body))
  70           ;; if (:results output), collect printed output
  71           ((member "output" result-params)
  72            (format "(clojure.core/with-out-str %s)" body))
  73           (t body))))
  74
  75 (defun org-babel-execute:clojure (body params)
  76   "Execute a block of Clojure code with Babel."
  77   (require 'slime)
  78   (with-temp-buffer
  79     (insert (org-babel-expand-body:clojure body params))
  80     ((lambda (result)
  81        (let ((result-params (cdr (assoc :result-params params))))
  82          (if (or (member "scalar" result-params)
  83                  (member "verbatim" result-params))
  84              result
  85            (condition-case nil (org-babel-script-escape result)
  86              (error result)))))
  87      (slime-eval
  88       `(swank:eval-and-grab-output
  89         ,(buffer-substring-no-properties (point-min) (point-max)))
  90       (cdr (assoc :package params))))))
  91
  92 (provide 'ob-clojure)
  93
  94
  95
  96 ;;; ob-clojure.el ends here