;;; ob-groovy.el --- Babel Functions for Groovy -*- lexical-binding: t; -*-
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;; Copyright (C) 2013-2018 Free Software Foundation, Inc.
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;; Author: Miro Bezjak
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;; Keywords: literate programming, reproducible research
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;; Homepage: https://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Currently only supports the external execution. No session support yet.
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;;; Requirements:
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;; - Groovy language :: http://groovy.codehaus.org
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;; - Groovy major mode :: Can be installed from MELPA or
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;; https://github.com/russel/Emacs-Groovy-Mode
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;;; Code:
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(require 'ob)
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(defvar org-babel-tangle-lang-exts) ;; Autoloaded
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(add-to-list 'org-babel-tangle-lang-exts '("groovy" . "groovy"))
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(defvar org-babel-default-header-args:groovy '())
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(defcustom org-babel-groovy-command "groovy"
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"Name of the command to use for executing Groovy code.
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May be either a command in the path, like groovy
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or an absolute path name, like /usr/local/bin/groovy
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parameters may be used, like groovy -v"
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:group 'org-babel
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:version "24.3"
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:type 'string)
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(defun org-babel-execute:groovy (body params)
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"Execute a block of Groovy code with org-babel. This function is
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called by `org-babel-execute-src-block'"
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(message "executing Groovy source code block")
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(let* ((processed-params (org-babel-process-params params))
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(session (org-babel-groovy-initiate-session (nth 0 processed-params)))
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(result-params (nth 2 processed-params))
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(result-type (cdr (assq :result-type params)))
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(full-body (org-babel-expand-body:generic
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body params))
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(result (org-babel-groovy-evaluate
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session full-body result-type result-params)))
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(org-babel-reassemble-table
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result
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(org-babel-pick-name
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(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
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(org-babel-pick-name
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(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
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(defvar org-babel-groovy-wrapper-method
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"class Runner extends Script {
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def out = new PrintWriter(new ByteArrayOutputStream())
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def run() { %s }
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}
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println(new Runner().run())
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")
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(defun org-babel-groovy-evaluate
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(session body &optional result-type result-params)
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"Evaluate BODY in external Groovy process.
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If RESULT-TYPE equals `output' then return standard output as a string.
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If RESULT-TYPE equals `value' then return the value of the last statement
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in BODY as elisp."
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(when session (error "Sessions are not (yet) supported for Groovy"))
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(pcase result-type
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(`output
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(let ((src-file (org-babel-temp-file "groovy_")))
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(progn (with-temp-file src-file (insert body))
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(org-babel-eval
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(concat org-babel-groovy-command " " src-file) ""))))
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(`value
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(let* ((src-file (org-babel-temp-file "groovy_"))
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(wrapper (format org-babel-groovy-wrapper-method body)))
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(with-temp-file src-file (insert wrapper))
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(let ((raw (org-babel-eval
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(concat org-babel-groovy-command " " src-file) "")))
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(org-babel-result-cond result-params
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raw
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(org-babel-script-escape raw)))))))
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(defun org-babel-prep-session:groovy (_session _params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(error "Sessions are not (yet) supported for Groovy"))
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(defun org-babel-groovy-initiate-session (&optional _session)
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"If there is not a current inferior-process-buffer in SESSION
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then create. Return the initialized session. Sessions are not
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supported in Groovy."
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nil)
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(provide 'ob-groovy)
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;;; ob-groovy.el ends here
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