rake task to install/update plugins (props to @marcoceppi)

lib/tasks/plugin.rake

@@ -0,0 +1,44 @@
+directory 'plugins'
+
+desc 'install plugin'
+task 'plugin:install', :repo do |t, args|
+  repo = ENV['REPO'] || ENV['repo'] || args[:repo]
+  name = ENV['NAME'] || ENV['name'] || File.basename(repo, '.git')
+
+  plugin_path = File.expand_path('plugins/' + name)
+  if File.directory?(File.expand_path(plugin_path))
+   abort('Plugin directory, ' + plugin_path + ', already exists.')
+  end
+
+  clone_status = system('git clone ' + repo + ' ' + plugin_path)
+  unless clone_status
+    FileUtils.rm_rf(plugin_path)
+    abort('Unable to clone plugin')
+  end
+end
+
+desc 'update all plugins'
+task 'plugin:update_all' do |t|
+  # Loop through each directory
+  plugins = Dir.glob(File.expand_path('plugins/*')).select { |f| File.directory? f }
+  # run plugin:update
+  plugins.each { |plugin| Rake::Task['plugin:update'].invoke(plugin) }
+end
+
+desc 'update a plugin'
+task 'plugin:update', :plugin do |t, args|
+  plugin = ENV['PLUGIN'] || ENV['plugin'] || args[:plugin]
+  plugin_path = plugin
+  plugin = File.basename(plugin)
+
+  unless File.directory?(plugin_path)
+    if File.directory?('plugins/' + plugin)
+      plugin_path = File.expand_path('plugins/' + plugin)
+    else
+      abort('Plugin ' + plugin + ' not found')
+    end
+  end
+
+  update_status = system('git --git-dir "' + plugin_path + '/.git" --work-tree "' + plugin_path + '" pull')
+  abort('Unable to pull latest version of plugin') unless update_status
+end