Rakefile

require 'rake'
require 'erb'

desc "install the dot files into user's home directory"
task :install do
  replace_all = false
  Dir['*'].each do |file|
    next if %w[Rakefile README.markdown LICENSE].include? file
    
    if File.exist?(File.join(ENV['HOME'], ".#{file.sub('.erb', '')}"))
      if File.identical? file, File.join(ENV['HOME'], ".#{file.sub('.erb', '')}")
        puts "identical ~/.#{file.sub('.erb', '')}"
      elsif replace_all
        replace_file(file)
      else
        print "overwrite ~/.#{file.sub('.erb', '')}? [ynaq] "
        case $stdin.gets.chomp
        when 'a'
          replace_all = true
          replace_file(file)
        when 'y'
          replace_file(file)
        when 'q'
          exit
        else
          puts "skipping ~/.#{file.sub('.erb', '')}"
        end
      end
    else
      link_file(file)
    end
  end
end

def replace_file(file)
  FileUtils.rm_rf "#{ENV['HOME']}/.#{file.sub('.erb', '')}"
  link_file(file)
end

def link_file(file)
  if file =~ /.erb$/
    puts "generating ~/.#{file.sub('.erb', '')}"
    File.open(File.join(ENV['HOME'], ".#{file.sub('.erb', '')}"), 'w') do |new_file|
      new_file.write ERB.new(File.read(file)).result(binding)
    end
  else
    puts "linking ~/.#{file}"

    link = "#{ENV['HOME']}/.#{file}"
    target = "#{Dir.pwd}/#{file}"

    if RUBY_PLATFORM =~ /(win32|mingw32)/
      mklink_opts = File.directory?(target) ? "/D" : ""

      link.gsub! '/', "\\"
      target.gsub! '/', "\\"

      link = "#{ENV['HOME']}/vimfiles" if file == 'vim'

      system %Q{cmd /c mklink #{mklink_opts} "#{link}" "#{target}"}
    else
      system %Q{ln -s "#{target}" "#{link}"}
    end
  end

end