Initialize the asciicast knitr engine

Call this function in your Rmd file to enable creating asciinema casts from code chunks.

Usage

init_knitr_engine(
  echo = FALSE,
  same_process = TRUE,
  timeout = 10,
  startup = NULL,
  record_env = NULL,
  echo_input = TRUE,
  interactive = TRUE
)

Arguments

echo

Whether to print the code of asciicast chunks.

same_process

Whether to run all asciicast chunks in the same R process. To restart this R process, call init_knitr_engine() again.

timeout

Idle timeout, in seconds If the R subprocess running the recording does not answer within this limit, it is killed and the recording stops.

startup

Quoted language object to run in the subprocess before starting the recording.

record_env

Environment variables to set for the R subprocess.

echo_input

Whether to echo the input in the asciicast recording.

interactive

Whether to run R in interactive mode. Note that in interactive mode R might ask for terminal input.

Details

Limitations

• purl() or setting the purl = TRUE chunk option, does not work properly, in that knitr thinks that asciicast chunks are not R code, so they will appear as comments. If you know how to fix this, please contact us.

Examples

Call this function from an Rmd chunk and then you can use the asciicast knitr engine:

```{r setup, include = FALSE}
asciicast::init_knitr_engine()
```

```{asciicast, cache = TRUE}`
#' Rows: 10
# This is an asciicast example
loadedNamespaces()
```