compare_hostnames.rb

#!/usr/bin/env ruby

require 'fileutils'

# Function to extract hostnames by actually loading the Ruby module
def extract_hostnames_from_module(file_path)
  # Read the file content
  content = File.read(file_path)
  
  # Create a temporary module to load the content
  module_content = content.gsub(/module AllowedHostnameHelper/, 'module TempAllowedHostnameHelper')
  
  # Write to a temporary file
  temp_file = '/tmp/temp_allowed_hostname_helper.rb'
  File.write(temp_file, module_content)
  
  # Load the temporary module
  load temp_file
  
  # Access the constant
  hostnames = TempAllowedHostnameHelper::ALLOWED_HOSTNAME_SUFFIXES
  
  # Clean up
  File.delete(temp_file)
  
  return hostnames.sort
rescue => e
  puts "Error loading module: #{e.message}"
  return []
end

# Get current version
current_file = 'dashboard/app/helpers/allowed_hostname_helper.rb'
current_hostnames = extract_hostnames_from_module(current_file)

# Get previous version from git
previous_content = `git show HEAD~1:#{current_file}`
temp_previous_file = '/tmp/previous_allowed_hostname_helper.rb'
File.write(temp_previous_file, previous_content)
previous_hostnames = extract_hostnames_from_module(temp_previous_file)
File.delete(temp_previous_file)

# Write both lists to files
File.write('/tmp/current_hostnames.txt', current_hostnames.join("\n"))
File.write('/tmp/previous_hostnames.txt', previous_hostnames.join("\n"))

# Compare and show differences
puts "=== CURRENT HOSTNAMES (#{current_hostnames.length}) ==="
puts current_hostnames.join("\n")
puts "\n"

puts "=== PREVIOUS HOSTNAMES (#{previous_hostnames.length}) ==="
puts previous_hostnames.join("\n")
puts "\n"

puts "=== COMPARISON ==="
missing = previous_hostnames - current_hostnames
added = current_hostnames - previous_hostnames

if missing.any?
  puts "MISSING from current version:"
  missing.each { |h| puts "  - #{h}" }
  puts
end

if added.any?
  puts "ADDED in current version:"
  added.each { |h| puts "  + #{h}" }
  puts
end

if missing.empty? && added.empty?
  puts "✅ All hostnames are present - no differences found!"
else
  puts "❌ Differences found - check the lists above"
end

puts "\nFiles written to:"
puts "  /tmp/current_hostnames.txt"
puts "  /tmp/previous_hostnames.txt"