Rcmd检查：我从未使用过的':::'调用导入的未导出对象

Question

I am trying to write my first R package. But with Rcmd check I always get the following message:

❯ checking dependencies in R code ... NOTE
Unexported object imported by a ':::' call: ‘knitr:::is_blank’
See the note in ?`:::` about the use of this operator.

0 errors ✔ | 0 warnings ✔ | 1 note ✖

R CMD check succeeded

But I have is_blank() never used in my R scripts!

I have used knitr (and rmarkdown ) for the Vignettes:

%\VignetteEngine{knitr::rmarkdown}

And I have knitr (and rmarkdown ) included in the Suggests and VignetteBuilder:

Suggests:
    knitr,
    rmarkdown
VignetteBuilder: 
    knitr,
    rmarkdown 

I hope this information is enough to understand my difficulty. What is the problem respectively what did I wrong?

My package is at https://github.com/petzi53/coinsR and I am using R version 3.6.0 (2019-04-26) on a Mac.

Answer 1

Does the error still show when you remove/comment out the other lines with ::: ie

fetch_yaml = bookdown:::fetch_yaml
load_config = blogdown:::load_config
split_yaml_body = blogdown:::split_yaml_body

in utils.R