lib/rconf/support/package_installer.rb in rconf-1.0.1 vs lib/rconf/support/package_installer.rb in rconf-1.0.3

@@ -84,14 +84,19 @@
     # === Return
     # true:: Always return true
     def install_darwin(packages, opts)
       return if packages.nil?
       BrewInstaller.check_and_install
+      res = Command.execute('brew', 'list')
+      all_installed = res.success? ? res.output.gsub("\t", "\n") : ''
       packages.each do |p|
         args = [ p ]
         args << opts if opts
+        formula = p.split('/').last.split('.rb').first
+        already_installed  = all_installed =~ /^#{formula}$/
+        next if already_installed
         res = Command.execute('brew', 'install', *args)
-        installed = res.success? && res.output !~ /Formula already installed/
+        installed = res.success? && res.output !~ /already installed/
         Command.sudo('brew', 'link', p) if installed
       end
     end
 
     # Install Windows software