34 lines
856 B
Ruby
34 lines
856 B
Ruby
require "open3"
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require "nokogiri"
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def perform_katex_sub(content)
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rendered = content.gsub /\\\(((?:[^\\]|\\[^\)])*)\\\)/ do |match|
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puts " Rendering #{$~[1]}"
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Open3.popen3("$(npm bin)/katex") do |i, o, e, t|
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i.write $~[1]
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i.close
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o.read.force_encoding(Encoding::UTF_8).strip
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end
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end
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rendered = rendered.gsub /\$\$((?:[^\$]|$[^\$])*)\$\$/ do |match|
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puts " Rendering display."
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Open3.popen3("$(npm bin)/katex -d") do |i, o, e, t|
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i.write $~[1]
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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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return rendered
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end
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files = ARGV[0..-1]
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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('//text()').each do |t|
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t.replace(perform_katex_sub(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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