Pandoc will start deprecate `--self-contained` in future version

[cderv]

Today --self-contained implies --standalone. Now --embed-resources will do the self contained mechanism but possibly without doing the standalone part.

Equivalent of using custom template today with --self-contained and

$body$

This will need to be handled in all our format function, possibly with change of argument name to go with Pandoc change, or just adding standalone in all format.

Context in

• Discussion: https://github.com/jgm/pandoc/issues/7331
• PR: https://github.com/jgm/pandoc/pull/8121

[IndrajeetPatil]

With Pandoc 2.19 out today, I can confirm that I am getting these warnings with rmarkdown::render():

[WARNING] Deprecated: --self-contained. use --embed-resources --standalone

[cderv]

Yes thanks. We need to conditionally handle this now that Pandoc 2.19 is out. This is on the todo list

[yihui]

Should be fixed now. You may install and test the development version via

remotes::install_github('rstudio/rmarkdown')

Thanks!

[cderv]

Thanks @yihui !

[yihui]

I worked on it because I received an email from CRAN yesterday telling me that they had upgraded (or tried to upgrade) to Pandoc 2.19 and saw this warning... We need to act sooner in future when we detect problems in the dev version of Pandoc, since it seems that CRAN tends to always install the latest version of Pandoc once it's released.

[cderv]

This is really new to me and big news that they install the latest version of Pandoc now ! Thanks for sharing. It will be of interest to others I guess that rely on pandoc through R Markdown.

I agree that we should act sooner from now own. I was only following and opening issues as of now. As we don't really know when a new Pandoc version will be release and no information on the new version number they'll use, we'll have a to find a good way to add support for new thing conditionally. The recent update to nightly version number could help us.

I'll think about it, and we'll discuss.

[yihui]

no information on the new version number they'll use, we'll have a to find a good way to add support for new thing conditionally

We may condition on if (pandoc_version() > CURRENT_LATEST_VERSION); pandoc_available() uses >=, which won't work.

---

Actually I just made a change in pandoc_version() in 45c6802e95c623ad458558315b40c21f059649a0 so that we can be more precise and use pandoc_available('X.Y.Z.YYYY.MM.DD') as the condition.

[cderv]

Great thanks. That will help !

Pandoc team does not write changelog on the fly but at once before release I think. I'll ask Albert. We will need to watch out closer the PR merged in Pandoc also. I am already watching the repo but I'll pay attention more.

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