In tinkr: Cast '(R)Markdown' Files to 'XML' and Back Again

Only the body of the (R) Markdown file is cast to XML, using the Commonmark specification via the commonmark package. YAML metadata could be edited using the yaml package, which is not the goal of this package.

We have created an R6 class object called yarn to store the representation of both the YAML and the XML data, both of which are accessible through the $body and $yaml elements. In addition, the namespace prefix is set to "md" in the $ns element.

You can perform XPath queries using the $body and $ns elements:

library("tinkr")
library("xml2")
path <- system.file("extdata", "example1.md", package = "tinkr")
head(readLines(path))
ex1 <- tinkr::yarn$new(path)
# find all ropensci.org blog links
xml_find_all(
  x = ex1$body, 
  xpath = ".//md:link[contains(@destination,'ropensci.org/blog')]", 
  ns = ex1$ns
)