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From: Joseph Turner <joseph@breatheoutbreathe.in>
To: Ihor Radchenko <yantar92@gmail.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: [PATCH] lisp/ob-plantuml.el: Insert results in buffer
Date: Sun, 31 Jul 2022 15:05:58 -0700	[thread overview]
Message-ID: <875yjdkk25.fsf@breatheoutbreathe.in> (raw)
In-Reply-To: <87a68t9uds.fsf@localhost>

Ihor Radchenko <yantar92@gmail.com> writes:
> You also need to change :result-params and :result-type.
> See `org-babel-execute-src-block'.

Here's what I've got so far:

```
(defvar org-babel-default-header-args:plantuml
  '((:exports . "results"))
  "Default arguments for evaluating a plantuml source block.")

(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* ((do-export (cdr (assq :file params)))
         (params (if do-export
                     (map-merge 'list params '((:results . "file") (:result-params "replace" "file")))
                   params))
         (out-file (or do-export
		       (org-babel-temp-file "plantuml-" ".txt"))) ; if ":file" is not provided, don't export, just print ASCII results
	 (cmdline (cdr (assq :cmdline params)))
	 (in-file (org-babel-temp-file "plantuml-"))
	 (java (or (cdr (assq :java params)) ""))
	 (executable (cond ((eq org-plantuml-exec-mode 'plantuml) org-plantuml-executable-path)
			   (t "java")))
	 (executable-args (cond ((eq org-plantuml-exec-mode 'plantuml) org-plantuml-executable-args)
				((string= "" org-plantuml-jar-path)
				 (error "`org-plantuml-jar-path' is not set"))
				((not (file-exists-p org-plantuml-jar-path))
				 (error "Could not find plantuml.jar at %s" org-plantuml-jar-path))
				(t (list java
					 "-jar"
					 (shell-quote-argument (expand-file-name org-plantuml-jar-path))))))
	 (full-body (org-babel-plantuml-make-body body params))
	 (cmd (mapconcat #'identity
			 (append
			  (list executable)
			  executable-args
			  (pcase (file-name-extension out-file)
			    ("png" '("-tpng"))
			    ("svg" '("-tsvg"))
			    ("eps" '("-teps"))
			    ("pdf" '("-tpdf"))
			    ("tex" '("-tlatex"))
			    ("vdx" '("-tvdx"))
			    ("xmi" '("-txmi"))
			    ("scxml" '("-tscxml"))
			    ("html" '("-thtml"))
			    ("txt" '("-ttxt"))
			    ("utxt" '("-utxt")))
			  (list
			   "-p"
			   cmdline
			   "<"
			   (org-babel-process-file-name in-file)
			   ">"
			   (org-babel-process-file-name out-file)))
			 " ")))
    (with-temp-file in-file (insert full-body))
    (message "\n%s\n" do-export)
    (message "\n%s\n" params)
    (message "%s" cmd) (org-babel-eval cmd "")
    (if (and (string= (file-name-extension out-file) "svg")
             org-babel-plantuml-svg-text-to-path)
        (org-babel-eval (format "inkscape %s -T -l %s" out-file out-file) ""))
    (unless do-export (with-temp-buffer
                        (insert-file-contents out-file)
                        (buffer-substring-no-properties (point-min) (point-max))))))
```

I've added a couple of (message ...) blocks to log the value of
do-export and params. It appears that this combination is producing a
params value which is equivalent to the value of params produced by the
current org-babel-execute:plantuml function. However, when the above
function is executed on a block like:

#+begin_src plantuml :file "this.png"
  Bob->Alice : Hello1!
#+end_src

I get "Code block produced no output."

I suspect that setting the scoped params variable has no effect on the
execution of the function, since I can set params to '((:results .
"none")), and I'll still get a printed result if
org-babel-default-header-args:plantuml is set to the above value.

Is it safe to modify the value of org-babel-default-header-args:plantuml
from within the function? Would that even work?

Thank you for your patience in figuring this out with me :)

Joseph




  reply	other threads:[~2022-07-31 22:14 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-19 23:15 Joseph Turner
2022-07-25 13:15 ` Ihor Radchenko
2022-07-25 19:52   ` Joseph Turner
2022-07-26  5:50     ` Ihor Radchenko
2022-07-27 20:51       ` Joseph Turner
2022-07-28 14:36         ` Ihor Radchenko
2022-07-31 22:05           ` Joseph Turner [this message]
2022-08-02 12:42             ` Ihor Radchenko

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