xxxd0.1.rb

#!/usr/bin/env ruby
#
# ==========================================================================
# xxxd0.1.rb -- version 0.0.99.20230927
#
# written by cleemy desu wayo / Licensed under CC0 1.0
#
# official repository: https://gitlab.com/cleemy-desu-wayo/xxxd0.1
# ==========================================================================

require 'digest'

now_str = Time.now.utc.strftime('%Y-%m-%d %H:%M:%S %Z')

convert_type = 'sha2-256'

case ARGV[0]
when '--conv=base64'
  require 'base64'
  convert_type = 'base64'
when '--conv=sha2-256'
  convert_type = 'sha2-256'
when /s.*256/
  raise 'ERROR: invalid option... did you mean sha2-256?'
when nil
  nil
else
  raise 'ERROR: invalid option'
end

header = "
#####################################################################
# hash list
# 
# #{now_str}
# 
# format:
#   <byte size>,<#{convert_type}>
# 
#####################################################################
".strip

puts header

def convert_data(bin_data, convert_type)
  if convert_type == 'sha2-256'
    Digest::SHA256.hexdigest(bin_data)
  elsif convert_type == 'base64'
    Base64.strict_encode64(bin_data)
  end
end

def get_fileinfo_from_file(file_name, convert_type)
  bin_data = File.read(file_name)
  [bin_data.bytesize, convert_data(bin_data, convert_type)]
end

Dir.glob('*') do |file_name|
  next unless File.file?(file_name)       # ignore dir
  next unless File.readable?(file_name)   # ignore unreadable files
  next if file_name.start_with?('.')      # ignore dotfiles
  next if file_name.start_with?('xxxd')   # ignore xxxd*

  file_info = get_fileinfo_from_file(file_name, convert_type)
  puts "#{file_info[0]},#{file_info[1]}"
end