My notes for getting all the prerequisites for Matt Knox’s 1st RubyU class (hosted by Sermo) set up on my MacBook Pro (10.5).  Also see the friendfeed RubyU room.

== getting prereqs installed ==

ruby
> anvil:rubyclass macowell$ ruby -verison
> ruby 1.8.6 (2008-03-03 patchlevel 114) [i686-darwin9.2.2]

gems
See http://www.rubygems.org/read/chapter/1
> anvil:rubyclass macowell$ gem environment
> - RUBYGEMS VERSION: 1.1.1

git
see http://occident.us/2007/10/08/get-git/
> anvil:code macowell$ sudo port install git-core

ImageMagick
> anvil:~ macowell$ sudo port install ImageMagick

memcached
> anvil:~ macowell$ sudo port install memcached
memcached startup item: sudo launchctl load -w /Library/LaunchDaemons/org.macports.memcached.plist

mysql
> anvil:rubyclass macowell$ sudo port install mysql5 +server

launchd startup item: sudo launchctl load -w /Library/LaunchDaemons/org.macports.mysql5.plist

> anvil:rubyclass macowell$ sudo port clean –all mysql5 +server
> —> Cleaning mysql5
> anvil:rubyclass macowell$ sudo -u mysql mysql_install_db5
> Installing MySQL system tables…
> PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
> To do so, start the server, then issue the following commands:
> /opt/local/lib/mysql5/bin/mysqladmin -u root password ‘new-password’
> /opt/local/lib/mysql5/bin/mysqladmin -u root -h anvil.local password ‘new-password’

rubygems:

rails 2.1
I started with rails 2.0.2 and then ran
> anvil:rubyclass macowell$ sudo gem update rails

piston
> anvil:rubyu macowell$ sudo gem install piston

memcache-client
> anvil:rubyu macowell$ sudo gem install memcache-client

rmagick
> anvil:rubyu macowell$ sudo gem install rmagick

rspec
> anvil:rubyu macowell$ sudo gem install rspec

mongrel
already had it
> anvil:rubyu macowell$ sudo gem update mongrel

== Testing the PreReqs ==

> anvil:rubyu macowell$ git clone git://github.com/mattknox/rubyu_prereq_test.git

> anvil:rubyu_prereq_test macowell$ rake db:drop db:create db:migrate
> rake aborted!
> No such file or directory - /tmp/mysql.sock

symlink the location of the mysql.sock file installed by macports to where it is normally expected:
> anvil:rubyu_prereq_test macowell$ ln -s /opt/local/var/run/mysql5/mysqld.sock /tmp/mysql.sock

or just change rubyu/rubyu_prereq_test/config/database.yml:
# socket: /tmp/mysql.sock
socket: /opt/local/var/run/mysql5/mysqld.sock

> anvil:rubyu_prereq_test macowell$ rake db:drop db:create db:migrate
(it works)

> anvil:rubyu_prereq_test macowell$ ./script/server
> => Booting Mongrel (use ’script/server webrick’ to force WEBrick)
> => Rails 2.1.0 application starting on http://0.0.0.0:3000

> anvil:rubyu_prereq_test macowell$ memcached

Navigate to localhost:3000
IT WORKS! YAY!