October 2010 update: I wrote this a while back, before I knew about RVM. The Ruby Version Manager has a bunch of features that makes it better than macports for ruby and gem installation. Read about it here.
I finally got to walking through a great gentle introductory ALA article on Ruby on Rails. I wanted to run rails Demo to build my first project, but I got nastiness:
$ rails -v
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:379:in `report_activate_error': RubyGem version error: rake(0.7.3 not >= 0.8.3) (Gem::LoadError)
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:311:in `activate'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:337:in `activate'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:336:in `each'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:336:in `activate'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:65:in `active_gem_with_options'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:50:in `gem'
from /usr/bin/rails:18
That’s not especially welcoming. Let’s see if MacPorts can come to the rescue.
After installing MacPorts, this got me going:
sudo port selfupdate sudo port install rb-rubygems sudo gem install rails
I saw this from the gem install rails:
Successfully installed rake-0.8.3 Successfully installed activesupport-2.2.2 Successfully installed activerecord-2.2.2 Successfully installed actionpack-2.2.2 Successfully installed actionmailer-2.2.2 Successfully installed activeresource-2.2.2 Successfully installed rails-2.2.2 7 gems installed Installing ri documentation for rake-0.8.3... Installing ri documentation for activesupport-2.2.2... Installing ri documentation for activerecord-2.2.2... Installing ri documentation for actionpack-2.2.2... Installing ri documentation for actionmailer-2.2.2... Installing ri documentation for activeresource-2.2.2... Installing RDoc documentation for rake-0.8.3... Installing RDoc documentation for activesupport-2.2.2... Installing RDoc documentation for activerecord-2.2.2... Installing RDoc documentation for actionpack-2.2.2... Installing RDoc documentation for actionmailer-2.2.2... Installing RDoc documentation for activeresource-2.2.2...
I had some issues because my PATH included /usr/bin before /opt/local/bin (so MacOS’s old gem binary got picked up before MacPorts’ version). You can tell you’re running the correct version:
$ which gem /opt/local/bin/gem $ gem -v 1.3.1
If you see version 1.0.1, you’re still need to follow these instructions to install MacPorts. Add something like this to your ~/.bashrc or ~/.profile:
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
Anyway, looks like things are good now. Yea new toys.
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