mktemp for orgmode

mktemp for orgmode

[Karl Voit]

Hi, I sometimes wonder if there is something like mktemp[1] in
org-mode as, e.g., a built-in macro.

For example, PlantUML in orgmode[2] requires a file header argument to
write the image output to: ":file myoutput.svg"

In most cases, I really don't care about the output file and its
location. I just want to see it in my org-mode buffer and in various
output formats like PDF or HTML.

When I don't want to trash my org folder, I have to use ":file
/tmp/tmp.svg". The downside of it is, that this only works for
non-Windows systems because there is no "/tmp" on Windows.

Therefore, it would be cool to have something like {{{tmpfile}}} that
I could use in :file {{{tmpfile}}}

However, there is still an issue with this approach: what if I need
multiple separate {{{tmpfile}}} for, e.g., multiple PlantUML blocks
that are within the same heading and therefore get exported at once?

And: as a consequence, it would require {{{tmpdir}}} as well.

[1] https://www.gnu.org/software/autogen/mktemp.html
[2] http://plantuml.com/emacs

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Re: mktemp for orgmode

[John Kitchin]

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Can you do something like:


#+BEGIN_SRC some-lang :results output org drawer :file (make-temp-file
"prefix-")
....
#+END_SRC


John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu


On Sat, Mar 17, 2018 at 9:15 AM, Karl Voit <devnull@karl-voit.at> wrote:

> Hi, I sometimes wonder if there is something like mktemp[1] in
> org-mode as, e.g., a built-in macro.
>
> For example, PlantUML in orgmode[2] requires a file header argument to
> write the image output to: ":file myoutput.svg"
>
> In most cases, I really don't care about the output file and its
> location. I just want to see it in my org-mode buffer and in various
> output formats like PDF or HTML.
>
> When I don't want to trash my org folder, I have to use ":file
> /tmp/tmp.svg". The downside of it is, that this only works for
> non-Windows systems because there is no "/tmp" on Windows.
>
> Therefore, it would be cool to have something like {{{tmpfile}}} that
> I could use in :file {{{tmpfile}}}
>
> However, there is still an issue with this approach: what if I need
> multiple separate {{{tmpfile}}} for, e.g., multiple PlantUML blocks
> that are within the same heading and therefore get exported at once?
>
> And: as a consequence, it would require {{{tmpdir}}} as well.
>
> [1] https://www.gnu.org/software/autogen/mktemp.html
> [2] http://plantuml.com/emacs
>
> --
> get mail|git|SVN|photos|postings|SMS|phonecalls|RSS|CSV|XML into Org-mode:
>        > get Memacs from https://github.com/novoid/Memacs <
> Personal Information Management > http://Karl-Voit.at/tags/pim/
> Emacs-related > http://Karl-Voit.at/tags/emacs/
>
>
>

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Re: mktemp for orgmode

[Karl Voit]

* John Kitchin <jkitchin@andrew.cmu.edu> wrote:
>
> Can you do something like:
>
> #+BEGIN_SRC some-lang :results output org drawer :file (make-temp-file
> "prefix-")
> ....
> #+END_SRC

Awesome!

I was looking in the wrong direction.

#+BEGIN_SRC plantuml :file (make-temp-file "2018-03-18-testprefix-" nil ".svg")
(*) --> "step1"

--> "step2"

--> (*)
#+END_SRC

... works as expected and even defines the correct file extension.

Thanks!

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