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| | ;;; ob-clojure.el --- Babel Functions for Clojure -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2016 Free Software Foundation, Inc.
;; Author: Joel Boehland, Eric Schulte, Oleh Krehel, Frederick Giasson
;;
;; 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
;; Requirements:
;; - clojure (at least 1.2.0)
;; - clojure-mode
;; - either cider 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
;;; Code:
(require 'cl-lib)
(require 'ob)
(declare-function cider-current-connection "ext:cider-client" (&optional type))
(declare-function cider-current-session "ext:cider-client" ())
(declare-function nrepl-dict-get "ext:nrepl-client" (dict key))
(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 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
(cond ((featurep 'cider) 'cider)
(t 'slime))
"Backend used to evaluate Clojure code blocks."
:group 'org-babel
:type '(choice
(const :tag "cider" cider)
(const :tag "SLIME" slime)))
(defun org-babel-expand-body:clojure (body params)
"Expand BODY according to PARAMS, return the expanded body."
(let* ((vars (org-babel--get-vars params))
(result-params (cdr (assq :result-params params)))
(print-level nil) (print-length nil)
(body (org-trim
(if (null vars) (org-trim body)
(concat "(let ["
(mapconcat
(lambda (var)
(format "%S (quote %S)" (car var) (cdr var)))
vars "\n ")
"]\n" body ")")))))
(if (or (member "code" result-params)
(member "pp" result-params))
(format "(clojure.pprint/pprint (do %s))" body)
body)))
(defun org-babel-execute:clojure (body params)
"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))
(sbuffer "*Clojure Show Process Sub Buffer*")
(show (assq :show-process params))
(response (list 'dict))
status
result)
(cl-case org-babel-clojure-backend
(cider
(require 'cider)
(let ((result-params (cdr (assq :result-params params))))
;; Check if the user want show the process in an output buffer/window.
(when show
;; Create a new window with the show output buffer.
(switch-to-buffer-other-window sbuffer)
;; 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") (get-buffer sbuffer)))
(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") (get-buffer sbuffer))
(princ (nrepl-dict-get resp "root-ex") (get-buffer sbuffer)))
(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") (get-buffer sbuffer)))
(nrepl--merge response resp)
;; Update the status of the nREPL output session.
(setq status (nrepl-dict-get response "status")))
(cider-current-connection)
(cider-current-session))
;; 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 sbuffer nil t))
(kill-buffer sbuffer)
;; 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"))))
;; Check if user want to run code without showing the process.
(unless show
(setq response (let ((nrepl-sync-request-timeout
org-babel-clojure-sync-nrepl-timeout))
(nrepl-sync-request:eval
expanded (cider-current-connection) (cider-current-session))))
(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
(insert expanded)
(setq result
(slime-eval
`(swank:eval-and-grab-output
,(buffer-substring-no-properties (point-min) (point-max)))
(cdr (assq :package params)))))))
(org-babel-result-cond (cdr (assq :result-params params))
result
(condition-case nil (org-babel-script-escape result)
(error result)))))
(provide 'ob-clojure)
;;; ob-clojure.el ends here
|