Rakefile

require 'rake'
require 'erb'

namespace :setup do
  desc "links dotfiles into home directory"
  task :dotfiles do
    replace_all = false
    files = Dir['*'] - %w[Rakefile README.md oh-my-zsh resources packages]
    files.each do |file|
      system %Q{mkdir -p "$HOME/.#{File.dirname{file}}"} if file =~ /\//

      target_file = File.join(ENV["HOME"], ".#{file.sub(/\.erb$/, '')}")

      if File.exist?(target_file)
        if File.identical? file, target_file
          puts "using #{file}"
        elsif replace_all
          replace_file(file)
        else
          print "overwrite #{target_file}? [ynaq] "
          case $stdin.gets.chomp
          when "a"
            replace_all = true
            replace_file(file)
          when "y"
            replace_file(file)
          when "q"
            exit
          else
            puts "skipping #{target_file}"
          end
        end
      else
        link_file(file)
      end
    end
  end
end

def replace_file(file)
  system %Q{rm -rf "$HOME/.#{file.sub(/\.erb$/, '')}"}

  link_file(file)
end

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