I recently upgraded to Snow Leopard. I had to fight the urge to install sooner because we had some big projects underway at work and couldn’t afford any downtime.
Due to not having time to do a complete re-install I simply did the upgrade and I must admit I am pretty impressed with how smoothly it went. When I get some more time I’ll do a clean install but I’m happy with things for now.
One of the things I am finding however is that a lot of gems that required native extensions need to be rebuilt. For a number of these things are quite obvious and its just a case of either updating or removing the gem and re-installing.
Autotest however wasn’t quite so obvious. Some gems install dependancies that required rebuilding and its not always 100% obvious like the following:
/Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle, 9): no suitable image found. Did find: (LoadError) /Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle: no matching architecture in universal wrapper - /Library/Ruby/Gems/1.8/gems/sys-uname-0.8.3/lib/sys/uname.bundle from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' from /Library/Ruby/Gems/1.8/gems/autotest-fsevent-0.1.1/lib/autotest/fsevent.rb:3 from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `gem_original_require' from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `require' from /Users/stevesmith/.autotest:2 from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:195:in `load' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:195:in `initialize' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:194:in `each' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:194:in `initialize' from /Library/Ruby/Gems/1.8/gems/autotest-rails-4.1.0/lib/autotest/rails.rb:7:in `initialize' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:138:in `new' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/lib/autotest.rb:138:in `run' from /Library/Ruby/Gems/1.8/gems/ZenTest-4.1.3/bin/autotest:55 from /usr/bin/autotest:19:in `load' from /usr/bin/autotest:19
The gem sys-uname makes use of native extensions but is obviously not reinstalled as autotest is its just assumed to already exist. In this case simply doing
sudo gem uninstall sys-uname sudo gem install sys-uname
will bring it back. I guess this isn’t the most tricky thing to figure out but I thought I’d post it in case it was of use to anyone.