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Trying to install the new Rails 3 release on OSX 10.6.

Have never touched Ruby or Rails on this machine since purchased.

I was able to get rvm and get Ruby 1.9.2. installed. From there, I am stuck.

I tried:

rvmsudo gem install rails -v 3.0.0 sudo gem install rails --pre sudo gem install rails sudo gem update rails

And I get the same result error each time:

ERROR: While executing gem ... (Errno::ENOENT) No such file or directory - /Users/kevin/.rvm/gems/ruby-1.9.2-head@rails3/cache/activesupport-3.0.0.gem

If I do gem list, it says LOCAL GEMS and doesn't list anything.

I have read a few walkthroughs but honestly none of them address this issue and its kind of pissing me off. Why is this so difficult to install? Would love to learn it if someone could help me get it running.

I was trying to follow this:

http://eddorre.com/posts/installing-rails-3-beta-4-using-rvm

and this:

http://hivelogic.com/articles/compiling-ruby-rubygems-and-rails-on-snow-leopard

Which is actually linked from the ROR guides website. Am I missing dependencies? How do I get them in?

If I do rails -v I get:

rails -v /Library/Ruby/Site/1.8/rubygems.rb:779:in `report_activate_error': Could not find RubyGem rails (>= 0) (Gem::LoadError) from /Library/Ruby/Site/1.8/rubygems.rb:214:in `activate' from /Library/Ruby/Site/1.8/rubygems.rb:1082:in `gem' from /usr/bin/rails:18
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  • What version of rubygems do you have? ($ gem -v) Commented Sep 6, 2010 at 0:24

9 Answers 9

Reset to default
27

Older versions of rvm had a bug that can cause your ruby versions to get crosswired because the OS can cache executable paths for the which command (particularly if you are using zsh). See this long, detailed, mind blowing post by Yehuda Katz on the subject.

What I had to do this morning:

rvm update && rvm reload # update rvm rvm gemset delete rails3 # delete old gemset rvm install 1.9.2 rvm use 1.9.2 rvm gemset create rails3 rvm use 1.9.2@rails3 which ruby # check to be sure the ruby interpretter is properly set to 1.9.2 hash -r # if ruby interpretter is not pointing to 1.9.2 gem install rails which rails # check to be sure we are using rvm version of rails

Note: On newer versions of rvm, you will have to use rvm get stable instead of rvm update

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5 Comments

Even though that worked, I have to run rvm use 1.9.2 and rvm use 1.9.2@rails3 every time I start the terminal. Is there any way to replace the core OSX version of Ruby with 1.9.2 and Rails as well?
Kevin try: rvm use 1.9.2@rails3 --default
Kevin: you can also create an .rvmrc file per directory, which will automagically change to the ruby version you want, whenever you enter that directory: rvm.beginrescueend.com/workflow/rvmrc
rvm update has been removed. To get the latest version the command is now rvm get stable.
for LION - use rvm install 1.9.3 --with-gcc=clang stackoverflow.com/questions/8032824/…
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You don't need to use sudo when installing gems with rvm. If you follow the directions here to get RVM installed, you should be able to just do rvm use 1.9.2; gem install rails --version 3.0.0.

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I will try that. It said 1.9.2-p0 not found and to do rvm install ruby-1.9.2-p0. Running that now.
Same exact error. I updated my question with the error I get from rails -v.
The path of the Rails command being run is in /Library. If RVM were installed correctly, it would be in /Users/user/.rvm/. I suspect you haven't added the line to your .profile file, or something else went wrong. I suggest you just get rid of RVM entirely (rm -rf ~/.rvm), as well as any other Rubies you've installed and try installing it agaon, following the directions carefully.
I've done this 3 times now with that guide and get the same result. What is wrong?
I just don't know. All I can say is that in your post, the rails command is still the one that comes with OS X.
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You don't have to specify version 3. If you have 1.9.2-p0, it will automatically get rails 3 when you rvm gem install rails 3. note: no sudo. I think when you use sudo it makes it use the system-installed ruby. If you think you need sudo, use rvmsudo.

Things probably got messy because you were following guides based on the pre-stable release of rails, which involved many other things. If you like, you can try uninstalling rvm and re-doing everything. It really isn't all that difficult.

Remember, you need 1.9.2, 1.9.1 won't work.

curl -O http://rvm.beginrescueend.com/releases/rvm-install-head sh rvm-install-head rvm install 1.9.2-p0 # also remember to edit your bash profile and add the required lines # verify that 1.9.2-p0 shows up there rvm list # makes it so you're using it, and sets it as the default rvm use 1.9.2-p0 --default # verify this happened. should have => 1.9.2-p0 in the list rvm list # verify the version ruby --version # should automatically get 3.0 # `rvm gem install` installs it for every single installed ruby version # in my experience gem install rails

When you did rvm gem install, I think it installs it for every ruby version you have registered with rvm (at least it happened in my experience), so my assumption is that it was trying to force install rails 3 for an older ruby installation, which was missing the required gems.

Take it easy, not many commands are required. If you find yourself having to do 'hacks' or workarounds, then you're doing it wrong. Thankfully it's easy to start over. To remove rvm, just do rm -rfv ~/.rvm and also rm ~/.rvmrc if it's there.

Let me know how it goes.

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11 Comments

Simple as rm -rfv ~/.rvm, :) also might want to remove ~/.rvmrc if it's there
Same error. No such file or directory - /Users/kevin/.rvm/gems/ruby-1.9.2-p0/cache/activesupport-3.0.0.gem
So everything you did to verify you were doing things correctly were fine, right? Have you tried gem install activesupport ?
Also, what command was it that is putting out this error, gem install rails? verbatim?
gem install rails threw the error. gem install activesupport throws the same error
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working through this myself as new user mac osx blah blah

seems like a cache directory doesn't get made, try mkdir $HOME/.rvm/gems/cache

so far so good after that...

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1

I am running into the same problem (tried uninstalling and installing like Blaenk suggested)

rvm -v rvm 1.0.2 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/]

ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]

gem install rails ERROR: While executing gem ... (Errno::ENOENT) No such file or directory - /Users/pragnesh/.rvm/gems/ruby-1.9.2-p0/cache/activesupport-3.0.0.gem

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This is what I wind up getting no matter how I install it.
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After doing "rvm update && rvm reload" rvm got updated to 1.04 (instead of 1.02 which I got via the recommended GIT install yesterday!?) it worked nicely.

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Yes. This probably needs to get mentioned on the ROR guides website. I have a feeling a lot of people are running around this same problem as we speak.
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The solution worked for me, with a few tweeks:

Instead of using rvm update, I had to use rvm rubygems. Then, after doing all the work from post 2, I had to execute bundle install and I entered rvm use 1.9.2@rails3 to my .rvmrc file. Everything now works like a charm, even when starting a new shell or terminal session. The full list of commands I used is:

>> NEW >> rvm rubygems rvm reload # update rvm rvm gemset delete rails3 # delete old gemset rvm install 1.9.2 rvm use 1.9.2 rvm gemset create rails3 rvm use 1.9.2@rails3 which ruby # check to be sure the ruby interpretter is properly set to 1.9.2 >> DID NOT NEED >> hash -r # if ruby interpretter is not pointing to 1.9.2 gem install rails which rails # check to be sure we are using rvm version of rails >> NEW >> bundle install >> NEW >> cat 'rvm use 1.9.2@rails3' > .rvmrc
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i get Database file /Users/jp/.rvm/config/packages does not exist
0

Followed these instructions, and found them very useful for rvm installation. Hope they work for you.

http://adventuresincoding.com/2010/01/taking-the-helm-of-ruby-with-ruby-version-manager/

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Doing this after the rvm update and reload worked for me:

rm -rf .bundle && bundle install
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