[O] Bug: [Feature request] ob-plantuml fails if there is not jar: can it check for the executable as well? [8.3.5 (8.3.5-elpaplus @ /home/andrea/.emacs.d/elpa/org-plus-contrib-20160808/)]

[Andrea Giugliano]

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     http://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org-mode mailing list.
------------------------------------------------------------------------

I am using NixOS, and since this operating system does not use /usr/bin
as standard folder for executables, plantuml.jar cannot find the
graphviz dependency. NixOS provides a plantuml package, and so I can
call the plantuml command from commandline. It would be nice if
ob-plantuml tried to use the plantuml executable in the case
a .jar is not provided (instead of just failing).
Thanks for Org mode: it is simply wonderful!

Andrea

P.S:
Sorry if I am using the wrong medium for asking for a feature, but I do
not know where else I should do it.

Emacs  : GNU Emacs 24.5.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.29)
 of 2016-07-26 on localhost
Package: Org-mode version 8.3.5 (8.3.5-elpaplus @ 
/home/andrea/.emacs.d/elpa/org-plus-contrib-20160808/)

current state:
==============
(setq
 org-pandoc-epub-rights "Copyright 2016 Andrea <>"
 org-tab-first-hook '(org-hide-block-toggle-maybe 
org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook 
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-src-tab-acts-natively t
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-html-format-drawer-function '(lambda (name contents) contents)
 org-src-window-setup 'current-window
 org-latex-format-inlinetask-function 
'org-latex-format-inlinetask-default-function
 org-confirm-shell-link-function 'yes-or-no-p
 org-image-actual-width 550
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-latex-pdf-process '("latexmk -pdf %f")
 org-highlight-latex-and-related '(latex script entities)
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-default-notes-file "/home/andrea/workspace/agenda/myTasks.org"
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-format-drawer-function '(lambda (name contents) contents)
 org-from-is-user-regexp "\\<Andrea\\>"
 org-loop-over-headlines-in-active-region 'start-level
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '((lambda nil (local-set-key "\357" (quote 
org-mime-org-buffer-htmlize))) turn-on-flyspell
                 #[nil "\300\301\302\303\304$\207" [org-add-hook 
change-major-mode-hook org-show-block-all append local] 5]
                 #[nil "\300\301\302\303\304$\207" [org-add-hook 
change-major-mode-hook org-babel-show-result-all append local] 5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes 
org-eldoc-load)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-use-speed-commands t
 org-ascii-format-drawer-function '(lambda (name contents width) contents)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point 
org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers 
org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-plantuml-jar-path 
"/nix/store/2s91vgzv8ckhwq1hhxrf666q99z0pnhi-plantuml-8012/lib/plantuml.jar"
 org-babel-tangle-lang-exts '(("haskell" . "hs") ("ruby" . "rb") ("python" . 
"py") ("java" . "java") ("ocaml" . "ml")
                              ("emacs-lisp" . "el") ("elisp" . "el"))
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-html-format-headline-function 'org-html-format-headline-default-function
 org-structure-template-alist '(("p" "#+BEGIN_SRC plantuml :file uml.png 
\n?\n#+END_SRC") ("s" "#+BEGIN_SRC ?\n\n#+END_SRC")
                                ("e" "#+BEGIN_EXAMPLE\n?\n#+END_EXAMPLE") ("q" 
"#+BEGIN_QUOTE\n?\n#+END_QUOTE")
                                ("v" "#+BEGIN_VERSE\n?\n#+END_VERSE") ("V" 
"#+BEGIN_VERBATIM\n?\n#+END_VERBATIM")
                                ("c" "#+BEGIN_CENTER\n?\n#+END_CENTER") ("l" 
"#+BEGIN_LaTeX\n?\n#+END_LaTeX") ("L" "#+LaTeX: ")
                                ("h" "#+BEGIN_HTML\n?\n#+END_HTML") ("H" 
"#+HTML: ") ("a" "#+BEGIN_ASCII\n?\n#+END_ASCII")
                                ("A" "#+ASCII: ") ("i" "#+INDEX: ?") ("I" 
"#+INCLUDE: %file ?"))
 org-babel-load-languages '((ocaml . t) (java . t) (sh . t) (python . t) (ruby 
. t) (haskell . t) (plantuml . t) (dot . t))
 org-src-preserve-indentation t
 org-html-format-inlinetask-function 
'org-html-format-inlinetask-default-function
 org-agenda-files '("/home/andrea/workspace/agenda/myTasks.org")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-confirm-babel-evaluate nil
 )