Find duplicated permalinks in a jekyll site

everyone-hides.rb

require "safe_yaml"

directory = ARGV[0]

if directory.nil?
  $stderr.puts "Usage: bundle exec ruby everyone-hides.rb <directory>"
  exit 1
end

permalinks = []

Dir.glob("#{directory}/**/*.{md,html}") do |file|
    next if file =~ /_site/
    content = File.read(file)
    frontmatter = SafeYAML.load(content, safe: true)
    if frontmatter["permalink"]
      permalinks << {permalink: frontmatter["permalink"], file: file}
    end
end

exit if permalinks.group_by{|e| e[:permalink]}.select{|k, v| v.size > 1}.empty?

duplicates = permalinks.group_by{|e| e[:permalink]}.select{|k, v| v.size > 1}.each do |k, v|
  puts "Permalink: #{k}"
  v.each do |e|
    puts "  #{e[:file]}"
  end
end