RVM (Ruby Version Manager) 1.0.0

http://wayneeseguin.beginrescueend.com/2010/08/22/ruby-environment-version-manager-rvm-1-0-0/

by earcar • 16 years ago

144 38 16 years ago

wayneeseguin.beginrescueend.com

alexkiwi2• 16 years ago

If you develop Rails apps, and your not using RVM and gemsets... bless your heart.

dmix• 16 years ago

Is there a use-case outside of running ruby 1.8 and 1.9 at the same time?

benofsky• 16 years ago

If you're using a machine where you don't have root access it makes managing ruby installs and gem installs a lot easier.

dmillar2• 16 years ago

Gemsets for different apps, running MRI vs REE, and really you can run and switch from any flavor of Ruby (including JRuby) in an instant. It handles all the configuration and compilation for installation. Huge time saver, even if you are one of the few that only need one ruby version.

mechanical_fish• 16 years ago

I started using this last week to refactor a pile of legacy Ruby code. Gemsets per app is a godsend for that. You can disentangle the giant set of installed gems on your machine, figure out which ones are actual dependencies and which ones are only there because they were part of some crazy experiment six months ago, which ones are only there because they are dependencies of some other gem...

clayferris• 16 years ago

it is huge for developing/maintaining a gem since you can run your tests easily across all sorts of ruby versions and gemsets

joevandyk• 16 years ago

Better option is chef-solo + vagrant. That way, you can version all parts of the system, not just Ruby/Rails.

dmillar2• 16 years ago

RVM rocks I can't imagine working without it. Great to see it hit Version 1. Plus, Wayne is, hands down, one of the nicest guys I've ever met.

JoelMcCracken• 16 years ago

This is one of those tools that you don't realize you're missing until you start to use it.

On OS X, the entire process of installing was painless, straightforward, and took very little time. The process of learning it took even less time.

Highly recommended.

jshsu• 16 years ago

best feature: hopping on irc #rvm on freenode for instant assistance

telemachos4• 16 years ago

This can't be emphasized enough. Wayne's post about 1.0.0 reveals how close to burn out he was, but on the outside, he is seemingly tireless. He is on #rvm so many hours, quickly answering questions, over and above the work he does coding directly for rvm (not to mention his, you know, paying work and life). Sutto has also been in #rvm a lot over the summer I think.

dasil0033• 16 years ago

Wayne is a machine. This guy single-handedly revolutionized ruby installation, due in equal parts to technical chops, and just providing amazingly rock solid free technical support to any and all comers on a daily basis.

Please donate http://pledgie.com/campaigns/9822.

draegtun2• 16 years ago

Here is a nice post on RVM (and Perlbrew): Two tools you should be using, if you aren't already

http://ithaca.arpinum.org/2010/06/13/rvm-and-perlbrew.html

telemachos4• 16 years ago

Wow. I just want to record how cool this feels. I got posted on Hacker News by someone other than me. Thanks.

draegtun2• 16 years ago

You're very welcome.

And yes... I know that exact same feeling :) http://news.ycombinator.com/item?id=1151932

earcar• 16 years ago

RVM 1.0.0, Ruby 1.9.2 and Rails 3.

+ Rubinius will remove the GIL ("the work has already begun" -- Yehuda Katz http://yehudakatz.com/2010/08/14/threads-in-ruby-enough-alre...)

+ MacRuby will be even faster, more stable and more documented

It will be an awesome end of 2010/2011 for Ruby programmers.

dasil0033• 16 years ago

Don't forget Bundler. There's a lot of ambivalence to Bundler because of the painful journey to 1.0, but it's totally proportional to the difficulty of the problem, and I think they've really nailed it for 1.0.

ptn• 16 years ago

I'm confused about Bundler and rvm's per-project ruby and gemsets, what's the difference?

Pistos2• 16 years ago

I use RVM for all Ruby installations now. I can't think of a distro or UNIX flavour whose Ruby packages are so good that I would use them instead of RVM. That includes Gentoo, Debian, Ubuntu, CentOS, BSD, OSX.

For those developing Ruby libraries, RVM makes multi-version testing a breeze.

blowmage• 16 years ago

RVM is so full of awesome. Specifying a project's gemset with an .rvmrc file is my preferred workflow now. Its a genius tool.

http://rvm.beginrescueend.com/gemsets/basics/ http://rvm.beginrescueend.com/workflow/rvmrc/

uggedal2• 16 years ago

How does it compare to the more mature Virtualenv for Python?

LaGrange• 16 years ago

It's more comparable to virtualenv with virtualenvwrapper. Also, it manages multiple versions of Ruby (AFAIK virtualenv was coupled to a single version of Python) and has a per-directory dotfile (that way, when I switch to ~/Projects/something rvm automatically switches to correct ruby and gemset).

It generally feels more 'complete' to me.

I didn't do any serious work with virtualenv in quite some time, so this may have changed.

uggedal2• 16 years ago

virtualenv -p python2.5 will create a virtualenv with the Python 2.5 interpreter. I like the per-directory dotfile approach for autodetecting/activating a virtual ruby setup.

cldwalker2• 16 years ago

rvm is sweet for managing rubies but not so sweet in that it hijacks cd(). I like to cd without any apps meddling.

Recommended fix: $ echo rvm_project_rvmrc=0 >> ~/.rvmrc

bgentry2• 16 years ago

Are you referring to the auto switching of Ruby environments based on a directory change? If so, this latest version disables that by default

telemachos4• 16 years ago

Are you sure about that? .rvm/scripts/cd still has this at the top [1]:

    # Source a .rvmrc file in a directory after changing to it, if it exists.
    # To disable this fature, set rvm_project_rvmrc=0 in $HOME/.rvmrc

Also, the new security features that Wayne mentions in this post suggest that a cd automatically leads to a check on the directory you cd into. Doesn't that imply that rvm still has to plug itself into cd? (I may be confused here.)

I have to admit the cd thing ended up throwing me for an interesting loop at one point. I was scripting and no matter what happened, cd was returning 0 (success) - even when the cd command was actually failing. I could not figure out for the life of me why the right exit status wasn't being reported. It turns out that rvm wasn't saving and then returning the exit status of cd itself. (So the exit status I was capturing wasn't actually that of cd.)

Long story short, two minutes in #rvm and Wayne had it fixed [2].

Edit: I think I see the confusion. Cldwalker is saying that he doesn't like rvm tinkering with cd. Bgentry is saying that rvm no longer automatically switches Ruby if it finds a .rvmrc in a folder (after you cd into it). That's right, but it doesn't change what is bothering Cldwalker: rvm does in fact still get in front of cd. (I think 'hijacking' is too strong, but I know what Cldwalker means by it.) If you use rvm, then by default every time you issue cd, rvm runs the code in [1] (part of which obviously punts to the built-in cd). You can disable this behavior, as Cldwalker says, by setting the environment variable rvm_project_rvmrc to 0. Unless I'm wrong, the default is still on.

[1] http://github.com/wayneeseguin/rvm/blob/master/scripts/cd

[2] http://github.com/wayneeseguin/rvm/commit/f9aa3adebcca547924...

cldwalker2• 16 years ago

For those who like rvm for its gemsets, check out rip: http://github.com/defunkt/rip . Supports pushing/popping multiple ripenvs (gemsets) and has sweet support for unix-like command plugins.

stevefink• 16 years ago

Save so much time and energy with this tool. Realized how much more I get done on a daily basis because of it and almost felt guilty not to donate a few bucks.

jamesbritt• 16 years ago

At MWRC 2010 I wandered just outside the auditorium and ran into Wayne. I don't think we'd formerly met before, but we got to chatting and I told him I had played around a bit with RVM, but had some questions/issues.

Holy shit. I got the world's greatest crash course on, not just RVM, but bash scripting as well.

Wayne is not only a really nice guy and fun to hang with, but freakin' smart.

Super congrats on reaching 1.0.0.

RVM (Ruby Version Manager) 1.0.0

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