I tried to install mephisto today from the install scripts module and got the error below. We already have mongrel on the server so I was surprised to see it tried to install it.
Mongrel GEM install failed :
Need to update 4 gems from http://gems.rubyforge.org
....
complete
Select which gem to install for your platform (i386-linux)
1. mongrel 1.0.1 (mswin32)
2. mongrel 1.0.1 (ruby)
3. mongrel 1.0 (mswin32)
4. mongrel 1.0 (ruby)
5. Skip this gem
6. Cancel installation
> 2
Building native extensions. This could take a while...
Successfully installed mongrel-1.0.1
/usr/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in gem_original_require': no such file to load -- rdoc/rdoc (LoadError)
from /usr/lib/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire'
from /usr/lib/site_ruby/1.8/rubygems/doc_manager.rb:71:in load_rdoc'
from /usr/lib/site_ruby/1.8/rubygems/doc_manager.rb:41:ingenerate_ri'
from /usr/lib/site_ruby/1.8/rubygems/commands/install_command.rb:112:in execute'
from /usr/lib/site_ruby/1.8/rubygems/commands/install_command.rb:111:ineach'
from /usr/lib/site_ruby/1.8/rubygems/commands/install_command.rb:111:in execute'
from /usr/lib/site_ruby/1.8/rubygems/commands/install_command.rb:49:ineach'
from /usr/lib/site_ruby/1.8/rubygems/commands/install_command.rb:49:in execute'
from /usr/lib/site_ruby/1.8/rubygems/command.rb:70:ininvoke'
from /usr/lib/site_ruby/1.8/rubygems/command_manager.rb:120:in process_args'
from /usr/lib/site_ruby/1.8/rubygems/command_manager.rb:91:inrun'
from /usr/lib/site_ruby/1.8/rubygems/gem_runner.rb:30:in `run'
from /usr/bin/gem:23