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org-mode/lisp/ob-clojure.el
Bastien Guerry dbc39fcef5 ob-clojure.el: Add support for the cider backend
* ob-clojure.el (org-babel-clojure-backend): Add customization
options.
(org-babel-execute:clojure): Add support for cider.
2013-11-04 11:30:34 +01:00

134 lines
4.6 KiB
EmacsLisp

;;; ob-clojure.el --- org-babel functions for clojure evaluation
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Author: Joel Boehland, Eric Schulte, Oleh Krehel
;;
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; 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 either on Slime or
;; on Nrepl.el for all eval.
;; Requirements:
;; - clojure (at least 1.2.0)
;; - clojure-mode
;; - either cider or nrepl.el or SLIME
;; For cider, see https://github.com/clojure-emacs/cider
;; For SLIME, 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
;; For nREPL:
;; get clojure with https://github.com/technomancy/leiningen
;; get nrepl from MELPA (clojure-mode is a dependency).
;;; Code:
(require 'ob)
(declare-function cider-current-ns "ext:cider-interaction" ())
(declare-function nrepl-send-string-sync "ext:nrepl-client" (input &optional ns session))
(declare-function nrepl-current-tooling-session "ext:nrepl-client" ())
(declare-function nrepl-current-connection-buffer "ext:nrepl" ())
(declare-function nrepl-eval "ext:nrepl" (body))
(declare-function slime-eval "ext:slime" (sexp &optional package))
(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-backend 'nrepl
"Backend used to evaluate Clojure code blocks."
:group 'org-babel
:type '(choice
(const :tag "cider" cider)
(const :tag "nrepl" nrepl)
(const :tag "SLIME" slime)))
(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)))
(result-params (cdr (assoc :result-params params)))
(print-level nil) (print-length nil)
(body (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))))
(cond ((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))
;; if (:results output), collect printed output
((member "output" result-params)
(format "(clojure.core/with-out-str %s)" body))
(t body))))
(defun org-babel-execute:clojure (body params)
"Execute a block of Clojure code with Babel."
(let ((expanded (org-babel-expand-body:clojure body params)))
(case org-babel-clojure-backend
(cider
(require 'cider)
(or (nth 1 (nrepl-send-string-sync
(format "(clojure.pprint/pprint %s)" expanded)
(cider-current-ns)
(nrepl-current-tooling-session)))
(error "nREPL not connected! Use M-x cider-jack-in RET")))
(nrepl
(require 'nrepl)
(if (nrepl-current-connection-buffer)
(let* ((result (nrepl-eval expanded))
(s (plist-get result :stdout))
(r (plist-get result :value)))
(if s (concat s "\n" r) r))
(error "nREPL not connected! Use M-x nrepl-jack-in RET")))
(slime
(require 'slime)
(with-temp-buffer
(insert expanded)
((lambda (result)
(let ((result-params (cdr (assoc :result-params params))))
(org-babel-result-cond result-params
result
(condition-case nil (org-babel-script-escape result)
(error result)))))
(slime-eval
`(swank:eval-and-grab-output
,(buffer-substring-no-properties (point-min) (point-max)))
(cdr (assoc :package params)))))))))
(provide 'ob-clojure)
;;; ob-clojure.el ends here