RosettaCodeData/Task/Find-duplicate-files/Elixir/find-duplicate-files.elixir

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defmodule Files do
def find_duplicate_files(dir) do
IO.puts "\nDirectory : #{dir}"
File.cd!(dir, fn ->
Enum.filter(File.ls!, fn fname -> File.regular?(fname) end)
|> Enum.group_by(fn file -> File.stat!(file).size end)
|> Enum.filter(fn {_, files} -> length(files)>1 end)
|> Enum.each(fn {size, files} ->
Enum.group_by(files, fn file -> :erlang.md5(File.read!(file)) end)
|> Enum.filter(fn {_, files} -> length(files)>1 end)
|> Enum.each(fn {_md5, fs} ->
IO.puts " --------------------------------------------"
Enum.each(fs, fn file ->
IO.puts " #{inspect File.stat!(file).mtime}\t#{size} #{file}"
end)
end)
end)
end)
end
end
hd(System.argv) |> Files.find_duplicate_files