Searches through a provided Objective-C header and removes any imports to other headers that are not present in any folder under the current working folder tree

remove_missing_headers.rb

#!/usr/bin/env ruby

module_headers = Dir.glob("**/*.h").map {|f| File.basename(f) }
bridging_header = File.read(ARGV[0])
output_header = ""

bridging_header.lines.each do |l|
  if match = l.match(/#import\s*"(.*)"/)
    header = match.captures[0]
    if module_headers.include?(header)
      output_header << l
    end
  else
    output_header << l
  end
end

File.write(ARGV[0], output_header)