history_filtered_no_dry.rb

#!/usr/bin/env ruby
# frozen_string_literal: true

require 'resolv'
require 'uri'

def filter_arguments(line)
  line.gsub(/(\S+)=\S+/, '\1=[FILTERED_VALUE]')
end

def filter_ip_v4_addresses(line)
  line.gsub(Resolv::IPv4::Regex, '[FILTERED_IP]')
end

def filter_ip_v6_addresses(line)
  line.gsub(Resolv::IPv6::Regex, '[FILTERED_IP]')
end

def filter_urls(line)
  line.gsub(URI::DEFAULT_PARSER.make_regexp, '[FILTERED_URI]')
end

def filter_emails(line)
  line.gsub(URI::MailTo::EMAIL_REGEXP, '[FILTERED_EMAIL]')
end

def history_files
  %w[.bash_history .zsh_history].map do |file|
    history_file = File.join(ENV['HOME'], file)
    File.read(history_file) if File.exists?(history_file)
  end
end

history_files.each do |file|
  file.each_line do |line|
    line = filter_arguments(line)
    line = filter_ip_v4_addresses(line)
    line = filter_ip_v6_addresses(line)
    line = filter_urls(line)
    line = filter_emails(line)
    puts line
  end
end