Include node in Homebrew; install (js|json)hint for emacs

rake/pkg/emacs.rake

@@ -4,23 +4,28 @@ task :emacs => "emacs:update"
 namespace :emacs do
 
     task :install do
+        unless Dir.exists?(File.expand_path("~/.emacs.d"))
+            github('hlissner/emacs.d', '~/.emacs.d')
             Homebrew.install("emacs", "--with-gnutls --cocoa --keep-ctags --srgb")
             Homebrew.install "aspell"
-        github('hlissner/emacs.d', '~/.emacs.d')
+
+            sh_safe "/usr/local/bin/npm install jshint -g"
+            sh_safe "/usr/local/bin/npm install jsonlint -g"
+        end
     end
 
     task :update do
         echo "Updating emacs.d"
         sh_safe "cd ~/.emacs.d && git pull"
 
-        echo "You'll have to update emacs manually!"
+        echo "You'll have to update emacs packages manually!"
     end
 
     task :remove do
         echo "Uninstalling emacs"
         Homebrew.remove "emacs"
         Homebrew.remove "aspell"
-        rm_rf "~/.emacs.d" if Dir.exists? "~/.emacs.d"
+        rm_rf "~/.emacs.d" if Dir.exists?(File.expand_path("~/.emacs.d"))
     end
 
 end

rake/pkg/homebrew.rake

@@ -30,6 +30,7 @@ namespace :homebrew do
             luajit
             readline
             openssl
+            node
         }.each { |pkg| Homebrew.install pkg }
 
         %w{