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December 7, 2022 13:15
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Function for sourcing individual or multiple chunks from an RMD document
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| library(magrittr) | |
| library(stringr) | |
| library(readr) | |
| library(purrr) | |
| library(glue) | |
| library(knitr) | |
| source_rmd_chunks <- function(file, chunk_labels, skip_plots = TRUE, output_temp = FALSE){ | |
| temp <- tempfile(fileext=".R") | |
| knitr::purl(file, output = temp) | |
| text <- readr::read_file(temp) | |
| text <- purrr::map(chunk_labels, ~stringr::str_extract(text, glue::glue("(## ----{var})(.|[:space:])*?(?=(## ----)|$)", var = .x))) %>% | |
| stringr::str_c(collapse = "\n") | |
| readr::write_file(text, temp) | |
| if(skip_plots) { | |
| old_dev = getOption('device') | |
| options(device = function(...) { | |
| .Call("R_GD_nullDevice", PACKAGE = "grDevices") | |
| }) | |
| } | |
| source(temp) | |
| if(skip_plots) { | |
| options(device = old_dev) | |
| } | |
| if(output_temp) temp | |
| } |
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@py9mrg I wasn't really planning on it. My impression is Yihui isn't crazy about
knitr::purl()so didn't know if he'd want to incorporate support for something like this...Wouldn't hurt to open an issue though, feel free to @ me on jt.