don't attempt to execute non-R engines; suppress knitr warnings for unknown engines

rstudio / packrat

Packrat is a dependency management system for R

http://rstudio.github.io/packrat/

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don't attempt to execute non-R engines; suppress knitr warnings for unknown engines #640

Closed kevinushey closed 3 years ago

kevinushey commented 3 years ago

Closes https://github.com/rstudio/packrat/issues/639.

This also resolves an issue where Packrat would execute non-R code chunks during the dependency discovery process (😱 ) by overriding any other engines during dependency discovery.