| 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-args:clojure '((package . :any))) |
| 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 |