Added restore and backup tasks to rakefile

Rakefile

@@ -2,6 +2,33 @@ require 'rake'
 
 # loosely based on zholman's install script
 
+def linkables
+  linkables = Dir.glob('**/*.symlink')
+  linkables.each do |linkable|
+    file = linkable.split('/').last.split('.symlink').last
+    target = "#{ENV["HOME"]}/.#{file}"
+    yield file, target if block_given?
+  end
+end
+
+desc "make a backup of all files that will be replaced (if they exist)"
+task :backup do
+  linkables do |file, target|
+    if File.exists?(target) || File.symlink?(target)
+      `mv "$HOME/.#{file}" "$HOME/.#{file}.backup"`
+    end
+  end
+end
+
+desc "restore the backups"
+task :restore do
+  linkables do |file, target|
+    if File.exists?("#{ENV['HOME']}/.#{file}.backup")
+      `mv "$HOME/.#{file}.backup" "$HOME/.#{file}"`
+    end
+  end
+end
+
 desc "create all the symlinks"
 task :install do
   linkables = Dir.glob('*/**{.symlink}')
@@ -13,4 +40,15 @@ task :install do
   end
 end
 
+desc "remove all files added"
+task :uninstall do
+  Dir.glob('**/*.symlink').each do |linkable|
+    file = linkable.split('/').last.split('.symlink').last
+    target = "#{ENV["HOME"]}/.#{file}"
+    if File.symlink?(target)
+      FileUtils.rm(target)
+    end
+  end
+end
+
 task :default => 'install'