36 lines
1.0 KiB
Ruby
36 lines
1.0 KiB
Ruby
require "open3"
|
|
require "nokogiri"
|
|
|
|
def render_cached(cache, command, string, render_comment = nil)
|
|
cache.fetch(string) do |new|
|
|
puts " Rendering #{render_comment || new}"
|
|
cache[string] = Open3.popen3(command) do |i, o, e, t|
|
|
i.write new
|
|
i.close
|
|
o.read.force_encoding(Encoding::UTF_8).strip
|
|
end
|
|
end
|
|
end
|
|
|
|
def perform_katex_sub(inline_cache, display_cache, content)
|
|
rendered = content.gsub /\\\(((?:[^\\]|\\[^\)])*)\\\)/ do |match|
|
|
render_cached(inline_cache, "katex", $~[1])
|
|
end
|
|
rendered = rendered.gsub /\$\$((?:[^\$]|$[^\$])*)\$\$/ do |match|
|
|
render_cached(display_cache, "katex -d", $~[1], "display")
|
|
end
|
|
return rendered
|
|
end
|
|
|
|
files = ARGV[0..-1]
|
|
inline_cache, display_cache = {}, {}
|
|
|
|
files.each do |file|
|
|
puts "Rendering file: #{file}"
|
|
document = Nokogiri::HTML.parse(File.open(file))
|
|
document.search('//*[not(ancestor-or-self::code)]/text()').each do |t|
|
|
t.replace(perform_katex_sub(inline_cache, display_cache, t.content))
|
|
end
|
|
File.write(file, document.to_html)
|
|
end
|