Need the filename of the Rmd when knitr runs

Question

Recently I asked about having an r variable set to the name of an Rmd file when knitr runs.

Need the filename of the Rnw when knitr runs in rStudio

knitr:::.knitEnv$input.dir
knitr:::knit_concord$get("infile")

Is there a similar knitr::: object for the name of an Rmd file?

Answer 1

knitr::current_input() will return the name of the Rmd file

Answer 2

You can search through the parent.frames until you find the frame referring to where the body of the function knitr is being evaluated (and thus the input argument is defined.

get(env = parent.frame(n = 8), 'input')

Works for me.

Note that I have not tested what happens if input is not a file name.....