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;;; ob-plantuml.el --- Babel Functions for Plantuml -*- lexical-binding: t; -*-
;; Copyright (C) 2010-2018 Free Software Foundation, Inc.
;; Author: Zhang Weize
;; Keywords: literate programming, reproducible research
;; Homepage: https://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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating plantuml script.
;;
;; Inspired by Ian Yang's org-export-blocks-format-plantuml
;; http://www.emacswiki.org/emacs/org-export-blocks-format-plantuml.el
;;; Requirements:
;; plantuml | http://plantuml.sourceforge.net/
;; plantuml.jar | `org-plantuml-jar-path' should point to the jar file
;;; Code:
(require 'ob)
(defvar org-babel-default-header-args:plantuml
'((:results . "file") (:exports . "results"))
"Default arguments for evaluating a plantuml source block.")
(defcustom org-plantuml-jar-path ""
"Path to the plantuml.jar file."
:group 'org-babel
:version "24.1"
:type 'string)
(defun org-babel-variable-assignments:plantuml (params)
"Return a list of PlantUML statements assigning the block's variables.
PARAMS is a property list of source block parameters, which may
contain multiple entries for the key `:var'. `:var' entries in PARAMS
are expected to be scalar variables."
(mapcar
(lambda (pair)
(format "!define %s %s"
(car pair)
(replace-regexp-in-string "\"" "" (cdr pair))))
(org-babel--get-vars params)))
(defun org-babel-plantuml-make-body (body params)
"Return PlantUML input string.
BODY is the content of the source block and PARAMS is a property list
of source block parameters. This function relies on the
`org-babel-expand-body:generic' function to extract `:var' entries
from PARAMS and on the `org-babel-variable-assignments:plantuml'
function to convert variables to PlantUML assignments."
(concat
"@startuml\n"
(org-babel-expand-body:generic
body params (org-babel-variable-assignments:plantuml params))
"\n@enduml"))
(defun org-babel-execute:plantuml (body params)
"Execute a block of plantuml code with org-babel.
This function is called by `org-babel-execute-src-block'."
(let* ((out-file (or (cdr (assq :file params))
(error "PlantUML requires a \":file\" header argument")))
(cmdline (cdr (assq :cmdline params)))
(in-file (org-babel-temp-file "plantuml-"))
(java (or (cdr (assq :java params)) ""))
(full-body (org-babel-plantuml-make-body body params))
(cmd (if (string= "" org-plantuml-jar-path)
(error "`org-plantuml-jar-path' is not set")
(concat "java " java " -jar "
(shell-quote-argument
(expand-file-name org-plantuml-jar-path))
(if (string= (file-name-extension out-file) "png")
" -tpng" "")
(if (string= (file-name-extension out-file) "svg")
" -tsvg" "")
(if (string= (file-name-extension out-file) "eps")
" -teps" "")
(if (string= (file-name-extension out-file) "pdf")
" -tpdf" "")
(if (string= (file-name-extension out-file) "vdx")
" -tvdx" "")
(if (string= (file-name-extension out-file) "xmi")
" -txmi" "")
(if (string= (file-name-extension out-file) "scxml")
" -tscxml" "")
(if (string= (file-name-extension out-file) "html")
" -thtml" "")
(if (string= (file-name-extension out-file) "txt")
" -ttxt" "")
(if (string= (file-name-extension out-file) "utxt")
" -utxt" "")
" -p " cmdline " < "
(org-babel-process-file-name in-file)
" > "
(org-babel-process-file-name out-file)))))
(unless (file-exists-p org-plantuml-jar-path)
(error "Could not find plantuml.jar at %s" org-plantuml-jar-path))
(with-temp-file in-file (insert full-body))
(message "%s" cmd) (org-babel-eval cmd "")
nil)) ;; signal that output has already been written to file
(defun org-babel-prep-session:plantuml (_session _params)
"Return an error because plantuml does not support sessions."
(error "Plantuml does not support sessions"))
(provide 'ob-plantuml)
;;; ob-plantuml.el ends here
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