Is it possible to perform conditional post-render scripts depending on quarto call?

[liyongg]

Description

For my Quarto book project, after each render I copy the rendered files to another directory: from _book to output in the root directory with some timestamps and additional information added. However, when using the preview function, the post-render script is executed as well and for every click on a chapter the directory is copied which is something I prefer not to have.

I would like to know if something like this would be possible in an R-script:

if (call_is_quarto_render_and_not_quarto_preview()) {
  # run functions
}

This way, quarto render is the only way to trigger post-render scripts and quarto preview not trigger post-render functions.

[mcanouil]

See QUARTO_PROJECT_RENDER_ALL described in https://quarto.org/docs/projects/scripts.html#pre-and-post-render which should address your needs.

Another possibility is to use project profile where in the default you don't have the post-render, see https://quarto.org/docs/projects/profiles.html.