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Ruby on Rails Beta 3 Install Problem on Snow Leopard

Answer 1

A:

If you're looking to do ruby/rails development on Mac, I'd strongly recommend not using the version of ruby/rubygems shipped with your mac. What I do recommend is:

Installing homebrew and using that to manage software packages on your mac.
Install brewbygems, which makes homebrew play nice with rubygems: gem install brewbygems
Install rvm and learn to love the different versions of ruby and rvm's gemsets feature: gem install rvm

Once you've done that you'll have a pretty robust development environment and you should be able to install any version of rails without a problem. Just keep in mind rails 3 works best using ruby 1.9.2 (install with rvm by running rvm install ruby-head) and is still in beta, meaning it isn't terribly stable and should not be used for anything production grade (yet).

Damien Wilson 2010-04-25 20:45:42

`brew install rubygems` => "Error: No available formula for rubygems"

Mark Richman 2010-06-10 21:14:04

Thanks for pointing that out, I forgot that I had installed rubygems manually. [Brewbygems](http://github.com/indirect/brewbygems/) seems to be a better alternative.

Damien Wilson 2010-06-10 21:57:39

Answer 2

A:

I found the same error message, while after some google I've successfully installed it by manually 'sudo mkdir lib' in the .../gems/rails-3.0.0.beta3. Though it hasn't raised further problem, I hope someone could tell what should be in the missing lib directory.

Yixi Zhang 2010-05-16 10:38:45

Answer 3

A:

The "sudo mkdir lib" worked perfectly.

Merovech 2010-06-05 03:18:52

Path of lib would be nice.

balupton 2010-10-30 10:18:50

Answer 4

A:

I am having the same problem with beta 4. The workaround is sudo gem install rails --pre --no-ri --no-rdoc though I don't know why.

Mark Richman 2010-06-10 21:12:06

It's not really a fix as it just doesn't install the documentation at all...

balupton 2010-10-30 10:19:18

Answer 5

A:

Hi, follow this railscast and you'll be just fine.

It seems anyhow that the problem arises in the documentation which shouldn't prevent you from using rails 3.

tommasop 2010-06-10 21:18:13

Answer 6

A:

All you need to run is gem install rdoc, follow it's instructions, then run the install rails command again and you're good. The problem is due to rdoc failing to install when installed with rails, if installed manually it works fine.

Source: http://gist.github.com/565967

^ I had the same problem, and this worked for me.

balupton 2010-10-20 05:31:14

Would you edit this answer to add the actual content of that gist (namely, that `gem install rdoc` is what you need)?

Drew Stephens 2010-10-29 22:09:03

@Drew, Done :-)

balupton 2010-10-30 10:18:29

Answer 7

+1 A:

You don't really need to do this sudo gem install rails --pre, simply sudo gem install rails. Rails3 is the default package now and out of beta.

It should work fine.

zengr 2010-10-20 05:40:03

That is where we are all having problem, with that command.

balupton 2010-10-30 10:19:47

please read before downvoting and commenting. This is a 6 month old question and at that time, the only option was `sudo gem install rails --pre`. But when I posted my answer, rails3 was default and you didn't need to append --pre!

zengr 2010-10-30 12:07:26

@balupton explanation please?

zengr 2010-10-30 21:22:31

Running `sudo gem install rails` two weeks ago caused the exact same problem the asker was experiencing. `sudo gem install rails --pre` didn't work either - this is with Rails 3.0.1. Hence the down vote, as all your answer said was do the same thing that's causing the problem and it should work.

balupton 2010-10-31 06:01:21

every one answered do install rails because, there was no accurate answer as per today's rails distribution.

zengr 2010-10-31 06:42:58

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Ruby on Rails Beta 3 Install Problem on Snow Leopard

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