rvm does not set ruby version - ruby

i am new to linux. i have kubuntu 11.10 , i have installed ruby 1.9.2 and only after this i have installed rvm. after this i made
rvm install 1.9.2
and
rvm install 1.8.7
and when i use
rvm use 1.8.7
ruby -v
it writes
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]
i tryed to use another versions but it writes same anyway, so i think that rvm dont have priority to choose ruby version. how to solve this problem? It's cause i have installed ruby and only after this i have installed rvm?

looking at the output of your rvm list, you have two rubies installed, none of them default.
Looks like you just missed the step to make 1.9.2 the default.
And it seems you didn't modify your .bash_profile file
See Step 3 on this page:
http://beginrescueend.com/rvm/install/
Your file ~/.bash_profile should contain this line:
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function
(make sure to start a new shell, after modifying .bash_profile)
Then run this: (to set the default Ruby version)
rvm --default use 1.9.2
ruby -v
See also:
http://beginrescueend.com/rubies/default/

First you should establish if rvm is installed correctly, you can determine that by entering type rvm | head -1 in your terminal. If you get the response rvm is a function then rvm is installed correctly.
If it's an installation problem carefully go back over each step, if you still can't figure out what's wrong I highly recommend visiting the #rvm channel on freenode (irc). The creator and other knowledgeable rvmers are almost always available, friendly and willing to help you troubleshoot. If you end up using ruby extensively, you're going to start needing more of the functionality rvm offers (gemsets, etc.) and #rvm can be a great resource when you get tripped up.

Related

Can't find Ruby 1.9.2 after installing RVM

I'm on Linux Ubuntu 12.04, and I first installed Ruby 1.9.2.
After I tried installing rvm to use Octopress, ruby --version in bash results in ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]
How can I use RVM with ruby 1.9.2?
I don't really understand what RVM is all about...
The 1.9.2 version you installed first is not accessible from rvm.
While working with rvm, only the list of rubies installed through rvm is served. The previously installed versions of ruby - while still present in the filesystem - are not included.
With the steps you have done so far, you have a 1.9.2 version installed in one location, and a 1.8.7 version installed as part of rvm.
Install 1.9,2 version by running the rvm install 1.9.2 command. After that, when you run the rvm list command, you should see an output similar to the following:
$ rvm list
rvm rubies
ruby-1.8.7-p358 [ i686 ]
=* ruby-1.9.2-p320 [ x86_64 ]
# => - current
# =* - current && default
# * - default
You can switch between different versions of ruby managed by rvm with the rvm use 1.8.7 / rvm use 1.9.2 commands.
Here's a short blogpost with a good intro to rvm: Get started right with RVM
RVM is a version manager which enables you to decide which of multiple installed Ruby versions you want to use in your current shell session. RVM does this by providing a shell function named rvm which can be used to switch between versions in the current session. This changes environment variables, especially the GEM_HOME and PATH, to match the currently selected Ruby installation.
Every installed Ruby version can be selected by a specific identifier string. If you had a system-wide Ruby installation already before you installed RVM, that one should be referenced by the string system. The newly installed version in your case should be called 1.9.2.
To make RVM work as intended, it is necessary to load the rvm shell function into your shell. How to do this is described in the RVM Installation Documentation in section 2 - "Load RVM into your shell sessions as a function".
You can see if the shell function is correctly loaded when the command type rvm | head -n1 responds with:
rvm is a shell function
If not correctly loaded it will tell you something like this:
rvm is /home/someone/.rvm/bin/rvm
If you finally have it working you can switch your active Ruby version with commands like rvm 1.9.2 or rvm system. You can get a list of all Ruby versions and their identifier strings recognized by RVM by the command rvm list.
You can also specify which Ruby version shall be enabled in all new shell sessions from the beginning by issuing the following command once:
rvm --default 1.9.2
Perhaps you have not yet switched to the ruby version with:
rvm use 1.9.2 (assuming you did rvm install 1.9.2)
for a more general explanation I gave an answer here which might help.

Why won't my rvm allow me to switch to an alternative Ruby?

Ubuntu already has Ruby 1.8.7 installed. Then I installed rvm and used it to install Ruby 1.9.2, which is the version I want to use. However, ruby -v always returns 1.8.7.
How do I get rvm to use Ruby 1.9.2?
bxu#vm-bxu:~$ rvm use 1.9.2
Using /usr/share/ruby-rvm/gems/ruby-1.9.2-p320
bxu#vm-bxu:~$ ruby -v
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]
The Problem
RVM does its own installation magic, but in Ubuntu's case it doesn't always install to the right Bash startup file. You probably don't actually have RVM running properly; even though it's sort of installed.
The Fix
You need to make sure the following two lines are at the BOTTOM of your ~/.bashrc file.
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"
export PATH=$PATH:$HOME/.rvm/bin
Then restart your terminal emulator or log back in. Note that sourcing ~/.bashrc has been known not to work in some cases, so this step will save your sanity.
RVM should now be working properly. The last step is to set your default Ruby.
rvm --default use 1.9.2
Important Edit
As I've just been reminded, RVM breaks Ubuntu login shells by installing ~/.bash_login, which overrides your Ubuntu ~/.profile in login shells. Move the code over to your ~/.bashrc if you haven't already done so, then remove or rename ~/.bash_login.
From the terminal:
rvm use 1.9.2
on Ubuntu you need to enable login shell in your terminal emulator, we have a quite good documentation for this at rvm site:
https://rvm.io/integration/gnome-terminal/

How to update system Ruby to 1.9.2 on Mac?

I saw an answer saying I should use RVM. But I don't know how even after:
$ rvm system
$ rvm current
system
$ ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
The title of the question, "How to update system Ruby to 1.9.2 on Mac" makes me wonder if you are trying to upgrade Apple's installation of Ruby 1.8.7 to 1.9.2. If that is true, STOP and do NOT try that. The Ruby installed by Apple is for their use, and apps installed by Apple use it.
find /usr -name '*.rb'
will list the reasons why.
RVM and other apps allow you to install Ruby safely, so unless you have very good knowledge of how Unix and the Mac work I strongly recommend you stick to them.
A very common problem we see is that the installation wasn't completed. Read the "Installation" section in the RVM installation page to double-check you've completed everything.
To install Ruby 1.9.2 do:
rvm notes
and read and install the needed dependencies. Then do:
rvm install 1.9.2
rvm use 1.9.2 --default
will tell RVM to always use 1.9.2 as a default. You can switch to the system version installed by Apple using:
rvm use system
and switch back using
rvm default
If you don't want an RVM-based solution:
Download and install Apple's Xcode developer tools so you get GCC et al, the ability to build your own software. (This is 4.25GB, but you only need to download it once.)
Download and extract the Ruby Source Code. (10.6MB)
Open a Terminal window and change into the directory of the source code.
Run the command ./configure && make; get a cup of tea while you wait
Run the command sudo make install to install this Ruby; you'll need to supply your administrator password
Modify your PATH environment variable to put /usr/local/bin in front of /usr/bin (so that your new Ruby is found before the system Ruby). You can do this by creating or editing a .profile file in your home directory to have the line:
export PATH="/usr/local/bin::$PATH"
If you're running TextMate, you'll also want to go to TextMate ▸ Preferences ▸ Advanced ▸ Shell Variables
and add or edit a PATH variable like this:
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
After this, rvm use system will use your 1.9.2p180 (the current version as of this post) install.
I'm assuming you're not sure how to install a new version of ruby with RVM - try:
rvm install 1.9.2
To then make it the default version to use:
rvm use 1.9.2 --default
Consider also: "for OS X try using RailsInstaller for OS X or try the official RVM GUI JewelryBox" -- Quoted from from the 4rd or 5th screen the RVM install page found here http://rvm.io/rvm/install
Whatever you do do not touch or mess with the system default Ruby that ships with your Mac I did that to see what would and my system was out of whack. If you would like to use a different version of Ruby use rvm.

How do I update Ruby-interpreters with RVM?

I installed RVM with a few versions of Ruby-interpreters some time ago.
How I can to update it, because new versions are already released?
I found only one way: rvm install 1.9.2-rc1 && rvm remove 1.9.2-preview1, but my gems are lost.
Can I update branches time to time? I haven't found any tips in the documentation.
Use the rvm upgrade 1.9.2-preview1 1.9.2-rc1 command or watch this screencast
[Edit: rvm has a new command to upgrade-- you likely want to use the answer by andy318]
AFAIK, there is no automatic way to do this at the moment, but something like this enables you to keep your gems:
rvm use 1.9.2-preview1
rvm gemset export
rvm install 1.9.2-rc1
rvm use 1.9.2-rc1
rvm gemset import
rvm remove 1.9.2-preview1
Now, for automating updates, you would have to detect version changes, that is easy, as you can simply use the return value of rvm use 1.9.2. Finding out what the new version is (1.9.2-rc1) is unnecessary, as it is aliased as 1.9.2. The trick is to find the latest installed version of 1.9.2. You could do something like this in a cron job:
# make sure you source rvm first
rvm update --head
rvm reload
if [ ! rvm use 1.9.2 ]; then
for ruby_version in `rvm list strings`; do
# find the latest version of 1.9.2
case $ruby_version in
ruby-1.9.2-*) latest192=$ruby_version;;
esac
done
rvm use $latest192
rvm gemset export 192.gems
rvm install 1.9.2
rvm use 1.9.2
rvm gemset import 192
rvm remove $latest192
fi
Did not try that, but I have similar code in my update script. I also slipped in a gem update and other stuff.
Feel free to visit the #rvm IRC channel on Freenode.
Current rvm version provides an easier way to do this. The 'upgrade' option will migrate gem sets, wrappers and environment files -
$ rvm upgrade 1.9.2-p136 1.9.2-p180
To find out if there is a more recent stable version of a ruby implementation for you to upgrade to, first get the latest version of RVM and then enumerate the known versions of Ruby.
$ rvm get stable
$ rvm list known
You can compare this the ruby versions installed on your system
$ rvm list rubies
you can install latest rvm and ruby by :
$ \curl -L https://get.rvm.io | bash -s stable --ruby
and check all the ruby version with stability
$ rvm list known
can also check details here : http://www.ruby-lang.org/en/downloads/
$ rvm install ruby 2.0.0-p247
Use when you want to download specific version or know this is stable.
There's a fantastic RVM GUI called JewelryBox that I use to manage my Ruby versions
http://jewelrybox.unfiniti.com
I think that is:
rvm all do gemset update

RVM doesn't switch Rubies

I'm running Ruby 1.9.1p243 on CentOS, and I decided to install rvm to handle upgrading to 1.9.2 or downgrading to 1.8.7 (whichever turns out to work better for rails3).
I followed the instructions here: http://rvm.beginrescueend.com/rvm/install/ and everything installed correctly. I was able to compile and install Ruby 1.8.7, 1.9.1, and 1.9.2.
However, if I try to actually switch to one of the rvm installed Rubies, with rvm use 1.8.7, for example, nothing works. My system still uses the Ruby I have installed in /usr/local/bin/ruby.
An example of the output I get:
$ rvm use 1.8.7
$ ruby -v
ruby 1.9.1p243 (2009-07-16 revision 24175) [i686-linux]
$ which ruby
/usr/local/bin/ruby
$ rvm use 1.9.2
$ ruby -v
ruby 1.9.1p243 (2009-07-16 revision 24175) [i686-linux]
$ which ruby
/usr/local/bin/ruby
I have no idea why this is happening, and I can't seem to find anything online about the issue either. Any help would be appreciated.
Just came across the same problem.
Instead of appending the following script to ~/.bash_profile, append it to ~/.bashrc:
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # This loads RVM into a shell session.
And then restart the terminal.
Typically rvm support is easiest via IRC (#rvm on freenode) - in this particular case, what does running "type rvm | head -n1" show? it should show "rvm is a function". If not, that means the line to source rvm isn't being run correctly and hence switching doesn't work. Typically this means you either have a return in your ~/.bashrc or you missed adding the line to source rvm.
Your install it as root account.
Try this in shell:
[[ -s "/usr/local/rvm/scripts/rvm" ]] && . "/usr/local/rvm/scripts/rvm"
before rvm switch operation. I add this line in my profile file and now all is ok.
Can be a problem of Terminal and
you should try to close your Terminal's window
and to open new one. :)
Try again to see if it has changed...
I've been struggling with setting default rvm ruby to no avail, until I've tried this:
sudo bash -l -c 'rvm alias create default ruby-1.9.3-p392'
"sudo" is for writing into /usr/local/rvm/config/alias (in my example it would contain "default=ruby-1.9.3-p392")
"bash -l" is to make sure it runs all the scripts (/etc/profile, /etc/bash.bashrc, etc..) of login shell

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