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;;; ob-vala.el --- Babel functions for Vala evaluation -*- lexical-binding: t; -*-
;; Copyright (C) 2017 Free Software Foundation, Inc.
;; Author: Christian Garbs <mitch@cgarbs.de>
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;;; License:
;; 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; ob-vala.el provides Babel support for the Vala language
;; (see http://live.gnome.org/Vala for details)
;;; Requirements:
;; - Vala compiler binary (valac)
;; - Vala development environment (Vala libraries etc.)
;;
;; vala-mode.el is nice to have for code formatting, but is not needed
;; for ob-vala.el
;;; Code:
(require 'ob)
(declare-function org-trim "org" (s &optional keep-lead))
;; File extension.
(add-to-list 'org-babel-tangle-lang-exts '("vala" . "vala"))
;; Header arguments empty by default.
(defvar org-babel-default-header-args:vala '())
(defcustom org-babel-vala-compiler "valac"
"Command used to compile a C source code file into an executable.
May be either a command in the path, like \"valac\"
or an absolute path name, like \"/usr/local/bin/valac\".
Parameters may be used like this: \"valac -v\""
:group 'org-babel
:version "26.1"
:package-version '(Org . "9.1")
:type 'string)
;; This is the main function which is called to evaluate a code
;; block.
;;
;; - run Vala compiler and create a binary in a temporary file
;; - compiler/linker flags can be set via :flags header argument
;; - if compilation succeeded, run the binary
;; - commandline parameters to the binary can be set via :cmdline
;; header argument
;; - stdout will be parsed as RESULT (control via :result-params
;; header argument)
;;
;; There is no session support because Vala is a compiled language.
;;
;; This function is heavily based on ob-C.el
(defun org-babel-execute:vala (body params)
"Execute a block of Vala code with Babel.
This function is called by `org-babel-execute-src-block'."
(message "executing Vala source code block")
(let* ((tmp-src-file (org-babel-temp-file
"vala-src-"
".vala"))
(tmp-bin-file (org-babel-temp-file "vala-bin-" org-babel-exeext))
(cmdline (cdr (assq :cmdline params)))
(flags (cdr (assq :flags params))))
(with-temp-file tmp-src-file (insert body))
(org-babel-eval
(format "%s %s -o %s %s"
org-babel-vala-compiler
(mapconcat #'identity
(if (listp flags) flags (list flags)) " ")
(org-babel-process-file-name tmp-bin-file)
(org-babel-process-file-name tmp-src-file)) "")
(when (file-executable-p tmp-bin-file)
(let ((results
(org-trim
(org-babel-eval
(concat tmp-bin-file (if cmdline (concat " " cmdline) "")) ""))))
(org-babel-reassemble-table
(org-babel-result-cond (cdr (assq :result-params params))
(org-babel-read results)
(let ((tmp-file (org-babel-temp-file "vala-")))
(with-temp-file tmp-file (insert results))
(org-babel-import-elisp-from-file tmp-file)))
(org-babel-pick-name
(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
(org-babel-pick-name
(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))))
(defun org-babel-prep-session:vala (_session _params)
"Prepare a session.
This function does nothing as Vala is a compiled language with no
support for sessions."
(error "Vala is a compiled language -- no support for sessions"))
(provide 'ob-vala)
;;; ob-vala.el ends here
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