Render html from a markdown file

This uses rmarkdown::pandoc_convert() to render HTML from a markdown file. We've specified pandoc extensions that align with the features desired in the Carpentries such as markdown_in_html_blocks, tex_math_dollars, and native_divs.

Usage

render_html(path_in, ..., quiet = FALSE)

Arguments

path_in

path to a markdown file

...

extra options (e.g. lua filters) to be passed to pandoc

quiet

if TRUE, no output is produced. Default is FALSE, which reports the markdown build via pandoc

Value

a character containing the rendred HTML file

Examples

if (rmarkdown::pandoc_available("2.11")) {
# first example---markdown to HTML
tmp <- tempfile()
ex <- c("# Markdown", 
  "", 
  "::: challenge", 
  "", 
  "How do you write markdown divs?",
  "", 
  ":::"
)
writeLines(ex, tmp)
cat(sandpaper:::render_html(tmp))

# adding a lua filter

lua <- tempfile()
lu <- c("Str = function (elem)",
"  if elem.text == 'markdown' then",
"    return pandoc.Emph {pandoc.Str 'mowdrank'}",
"  end",
"end")
writeLines(lu, lua)
lf <- paste0("--lua-filter=", lua)
cat(sandpaper:::render_html(tmp, lf))
}
#> <div id="markdown" class="section level1">
#> <h1>Markdown</h1>
#> <div id="discussion1" class="callout discussion">
#> <div class="callout-square">
#> <i class='callout-icon' data-feather='message-circle'></i>
#> </div>
#> <div class="section level3 callout-title callout-inner">
#> <h3 class="callout-title">Challenge</h3>
#> <div class="callout-content">
#> <p>How do you write markdown divs?</p>
#> </div>
#> </div>
#> </div>
#> </div><div id="markdown" class="section level1">
#> <h1>Markdown</h1>
#> <div id="discussion1" class="callout discussion">
#> <div class="callout-square">
#> <i class='callout-icon' data-feather='message-circle'></i>
#> </div>
#> <div class="section level3 callout-title callout-inner">
#> <h3 class="callout-title">Challenge</h3>
#> <div class="callout-content">
#> <p>How do you write <em>mowdrank</em> divs?</p>
#> </div>
#> </div>
#> </div>
#> </div>