Rmarkdown block tag for Liquid in Jekyll

Rmarkdown_tag.rb

module Jekyll
  class RMarkDownInlineTag < Liquid::Block

    def initialize(tag_name, markup, tokens)
      super
      require 'rinruby'
      
    end
    # parse the content of the tag as if it were an Rmd file

    def render(context)
      R.eval "require(knitr)"
      R.assign "content", super
      R.eval "content <- (knitr::knit2html(text = content, fragment.only = TRUE))"
      R.pull "content"
    end
  end
end

Liquid::Template.register_tag('Rmd', Jekyll::RMarkDownInlineTag)