prevent all bash code chunks from being evaluated when knitting

[rramiro]

Hi all,

Is there any option to prevent all {bash} code chunks from being evaluated?

I know I can set it for each chunk with eval=FALSE, but I was hoping there would be a way to do this for all chunks at once.

Thanks,

Ramiro

[jdblischak]

You can specify an option hook that sets eval to FALSE if engine is bash. In the example Rmd file below, only the code in the R chunk will be evaluated:

---
title: "Untitled"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_hooks$set(eval = function(options) {
  if (options$engine == "bash") {
    options$eval <- FALSE
  }
  options
})
```

```{r}
print("run")
```

```{bash}
echo "run"
```

You can read more about option hooks in the chapter Option hooks from the R Markdown Cookbook.

[rramiro]

Great, Thanks a lot for your help