lisp/ob-groovy.el

   1 ;;; ob-groovy.el --- Babel Functions for Groovy      -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2013-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Miro Bezjak
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25 ;; Currently only supports the external execution.  No session support yet.
  26
  27 ;;; Requirements:
  28 ;; - Groovy language :: http://groovy.codehaus.org
  29 ;; - Groovy major mode :: Can be installed from MELPA or
  30 ;;   https://github.com/russel/Emacs-Groovy-Mode
  31
  32 ;;; Code:
  33 (require 'ob)
  34
  35 (defvar org-babel-tangle-lang-exts) ;; Autoloaded
  36 (add-to-list 'org-babel-tangle-lang-exts '("groovy" . "groovy"))
  37 (defvar org-babel-default-header-args:groovy '())
  38 (defcustom org-babel-groovy-command "groovy"
  39   "Name of the command to use for executing Groovy code.
  40 May be either a command in the path, like groovy
  41 or an absolute path name, like /usr/local/bin/groovy
  42 parameters may be used, like groovy -v"
  43   :group 'org-babel
  44   :version "24.3"
  45   :type 'string)
  46
  47 (defun org-babel-execute:groovy (body params)
  48   "Execute a block of Groovy code with org-babel.  This function is
  49 called by `org-babel-execute-src-block'"
  50   (message "executing Groovy source code block")
  51   (let* ((processed-params (org-babel-process-params params))
  52          (session (org-babel-groovy-initiate-session (nth 0 processed-params)))
  53          (result-params (nth 2 processed-params))
  54          (result-type (cdr (assq :result-type params)))
  55          (full-body (org-babel-expand-body:generic
  56                      body params))
  57          (result (org-babel-groovy-evaluate
  58                   session full-body result-type result-params)))
  59
  60     (org-babel-reassemble-table
  61      result
  62      (org-babel-pick-name
  63       (cdr (assq :colname-names params)) (cdr (assq :colnames params)))
  64      (org-babel-pick-name
  65       (cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
  66
  67 (defvar org-babel-groovy-wrapper-method
  68
  69   "class Runner extends Script {
  70     def out = new PrintWriter(new ByteArrayOutputStream())
  71     def run() { %s }
  72 }
  73
  74 println(new Runner().run())
  75 ")
  76
  77
  78 (defun org-babel-groovy-evaluate
  79     (session body &optional result-type result-params)
  80   "Evaluate BODY in external Groovy process.
  81 If RESULT-TYPE equals `output' then return standard output as a string.
  82 If RESULT-TYPE equals `value' then return the value of the last statement
  83 in BODY as elisp."
  84   (when session (error "Sessions are not (yet) supported for Groovy"))
  85   (pcase result-type
  86     (`output
  87      (let ((src-file (org-babel-temp-file "groovy-")))
  88        (progn (with-temp-file src-file (insert body))
  89               (org-babel-eval
  90                (concat org-babel-groovy-command " " src-file) ""))))
  91     (`value
  92      (let* ((src-file (org-babel-temp-file "groovy-"))
  93             (wrapper (format org-babel-groovy-wrapper-method body)))
  94        (with-temp-file src-file (insert wrapper))
  95        (let ((raw (org-babel-eval
  96                    (concat org-babel-groovy-command " " src-file) "")))
  97          (org-babel-result-cond result-params
  98            raw
  99            (org-babel-script-escape raw)))))))
 100
 101
 102 (defun org-babel-prep-session:groovy (_session _params)
 103   "Prepare SESSION according to the header arguments specified in PARAMS."
 104   (error "Sessions are not (yet) supported for Groovy"))
 105
 106 (defun org-babel-groovy-initiate-session (&optional _session)
 107   "If there is not a current inferior-process-buffer in SESSION
 108 then create.  Return the initialized session.  Sessions are not
 109 supported in Groovy."
 110   nil)
 111
 112 (provide 'ob-groovy)
 113
 114
 115
 116 ;;; ob-groovy.el ends here