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