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Date: Sat, 16 Oct 2021 03:25:40 +0000 (UTC)
From: Sun Lin <sunlin7@yahoo.com>
To: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
Message-ID: <388850760.3644614.1634354740816@mail.yahoo.com>
Subject: Subject: [PATCH] Fix DISPLAY error on exporting org with plantuml
 to html
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------=_Part_3644613_1968899205.1634354740816
Content-Type: text/plain; charset=UTF-8
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Hi,

When the environment variable "DISPLAY" is invalid, exporting plantuml bloc=
k in org will got error message:
Exception in thread "main" java.awt.AWTError: Can't connect to X11 window s=
erver using 'localhost:11.0' as the value of the DISPLAY variable.
=C2=A0=C2=A0=C2=A0=C2=A0at sun.awt.X11GraphicsEnvironment.initDisplay(Nativ=
e Method)
...
To reproduce this issue, install the plantuml.jar and make sure it work ins=
ide org-mode.
Then open `/tmp/testing.org` and=C2=A0 input follow plantuml code and eval-=
expression `(progn (setenv "DISPLAY" "localhost:90")(org-html-export-to-htm=
l))`.
The root cause is org-mord execute the plantuml.jar in command line without=
 headless parameter, then plantuml will try read the DISPLAY, it's unnecess=
ary.
(For standalone plantuml, `org-plantuml-executable-args` has default value =
'-headless' to avoid reading DISPLAY).

Please help review the patch. Thanks.

Best Regards
Lin
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