Rakefile

require 'rake'

class String
  def split_by_last(char=" ")
    pos = self.rindex(char)
    pos != nil ? [self[0...pos], self[pos+1..-1]] : [self]
  end
end

desc "Hook our dotfiles into the home directory."
task :install do
  linkables = Dir.glob('*/**{.symlink}')

  skip_all = false
  overwrite_all = false
  backup_all = false

  linkables.each do |linkable|
    overwrite = false
    backup = false

    file = linkable.split('/').last.split('.symlink').last
    target = "#{ENV["HOME"]}/.#{file}"

    # If the target is already a symlink, then assume we put it there
    if File.exists?(target) && File.symlink?(target) then 
      puts "#{target} already installed"
      next 
    end

    if File.exists?(target) || File.symlink?(target)
      unless skip_all || overwrite_all || backup_all
        puts "File already exists: #{target}, what do you want to do? [s]kip, [S]kip all, [o]verwrite, [O]verwrite all, [b]ackup, [B]ackup all"
        case STDIN.gets.chomp
        when 'o' then overwrite = true
        when 'b' then backup = true
        when 'O' then overwrite_all = true
        when 'B' then backup_all = true
        when 'S' then skip_all = true
        when 's' then next
        end
      end
      FileUtils.rm_rf(target) if overwrite || overwrite_all
      `mv "$HOME/.#{file}" "$HOME/.#{file}.backup"` if backup || backup_all
    end
    `ln -s "$PWD/#{linkable}" "#{target}"`
  end
end


desc "Hook our dotfiles into positions deeper than the home directory."
task :deepinstall do
  linkables = Dir.glob('*/**{.deeplink}')

  skip_all = false
  overwrite_all = false
  backup_all = false

  linkables.each do |linkable|
    overwrite = false
    backup = false

    file = linkable.split('/').last.split('.deeplink').last
    new_path = file.gsub!('.','/')
    target = "#{ENV["HOME"]}/#{new_path}"
    target_path = target.split_by_last('/').first

    FileUtils.mkpath(target_path);

    # If the target is already a symlink, then assume we put it there
    if File.exists?(target) && File.symlink?(target) then 
      puts "#{target} already installed"
      next 
    end

    if File.exists?(target)
      unless skip_all || overwrite_all || backup_all
        puts "File already exists: #{target}, what do you want to do? [s]kip, [S]kip all, [o]verwrite, [O]verwrite all, [b]ackup, [B]ackup all"
        case STDIN.gets.chomp
        when 'o' then overwrite = true
        when 'b' then backup = true
        when 'O' then overwrite_all = true
        when 'B' then backup_all = true
        when 'S' then skip_all = true
        when 's' then next
        end
      end
      FileUtils.rm_rf(target) if overwrite || overwrite_all
      `mv "#{target}" "#{target}.backup"` if backup || backup_all
    end
    `ln -s "$PWD/#{linkable}" "#{target}"`
  end
end

task :uninstall do

  Dir.glob('**/*.symlink').each do |linkable|

    file = linkable.split('/').last.split('.symlink').last
    target = "#{ENV["HOME"]}/.#{file}"

    # Remove all symlinks created during installation
    if File.symlink?(target)
      FileUtils.rm(target)
    end
    
    # Replace any backups made during installation
    if File.exists?("#{ENV["HOME"]}/.#{file}.backup")
      `mv "$HOME/.#{file}.backup" "$HOME/.#{file}"` 
    end

  end
end

task :deepuninstall do

  puts "deepuninstall not implemented yet"
  next

  Dir.glob('**/*.deeplink').each do |linkable|

    file = linkable.split('/').last.split('.deeplink').last
    target = "#{ENV["HOME"]}/#{file}"

    # Remove all symlinks created during installation
    if File.symlink?(target)
      FileUtils.rm(target)
    end
    
    # Replace any backups made during installation
    if File.exists?("#{ENV["HOME"]}/#{file}.backup")
      `mv "$HOME/#{file}.backup" "$HOME/#{file}"` 
    end

  end
end

task :default => 'install'