Refactor tutorial knitr hooks and set them in the tutorial format #599
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`tutorial_knitr_options()` now prepares a list of knitr options with the knitr options and hooks that are used during the tutorial pre-render. This list is in the same format as the knitr options expected by `rmarkdown::output_format()` so we can set the knitr options directly in the `tutorial` output format. This ensures that the hooks are set for each `rmarkdown::render()` call. Previously, by only relying on `.onAttach()`, these hooks might be reset at the end of the first `render()` and wouldn't be re-installed for subsequent renders, resulting in the behavior seen in #598. I haven't removed the `.onAttach()` mechanism because it is still useful for catching learnr component usage outside of the `learnr::tutorial()` format.
This is now redundant for `learnr::tutorial` documents, but required for tutorials that don't use the tutorial format
rossellhayes
approved these changes
Oct 15, 2021
gadenbuie
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@dbkmsu can you please open a new issue with a reproducible example? |
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tutorial_knitr_options()now prepares a list of knitr options with the knitr options and hooks that are used during the tutorial pre-render. This list is in the same format as the knitr options expected byrmarkdown::output_format()so we can set the knitr options directly in thetutorialoutput format.This ensures that the hooks are set for each
rmarkdown::render()call. Previously, by only relying on.onAttach(), these hooks might be reset at the end of the firstrender()and wouldn't be re-installed for subsequent renders, resulting in the behavior seen in #598. I haven't removed the.onAttach()mechanism because it is still useful for catching learnr component usage outside of thelearnr::tutorial()format.Fixes #598