ksdiffdir.rb

#!/usr/bin/env ruby

# Usage: 
# ksdiffdir.rb /path/to/a /path/to/b

FOLDER_A = ARGV[0]
FOLDER_B = ARGV[1]

def build_file_list(dir_path)
  Dir.glob("#{dir_path}/**/*").select{ |f| File.file?(f) }.collect{ |f| f.gsub("#{dir_path}", '') }
end

def ks_diff(base, left, right)
  left ||= "/dev/null"
  right ||= "/dev/null"
  `ksdiff --partial-changeset --relative-path "#{base}" -- "#{left}" "#{right}"`
end

change_list = []
add_list = []
remove_list = []

if File.exists?(FOLDER_A) && File.exists?(FOLDER_B)
  file_list_a = build_file_list(FOLDER_A)
  file_list_b = build_file_list(FOLDER_B)
  file_list_a.each do |f|
    if file_list_b.include?(f)
      file_list_b.delete(f)
      if File.read(File.join(FOLDER_A, f)) != File.read(File.join(FOLDER_B, f))
        change_list << f
      end
    else
      remove_list << f
    end
  end
  add_list += file_list_b
  change_list.each do |f|
    ks_diff(f, File.join(FOLDER_A, f), File.join(FOLDER_B, f))
  end
  add_list.each do |f|
    ks_diff(f, nil, File.join(FOLDER_B, f))
  end
  remove_list.each do |f|
    ks_diff(f, File.join(FOLDER_A, f), nil)
  end
end