Installing Ruby 1.9.1 on Ubuntu?

StackOverflow https://stackoverflow.com/questions/1109695

Question

I wonder about installing the latest version of Ruby on Ubuntu 9.04. Now I can run through the ./configure and make stuff fine, but what I wonder about: how to avoid conflicts with the packaging system? For example if some other package I install depends on Ruby, wouldn't the package manager install the (outdated) Ruby package and in the worst case overwrite my files?

So I think I need some way to tell Ubuntu that Ruby is in fact already installed?

Was it helpful?

Solution

Save yourself the headache and use RVM (Ruby Version Manager)

Keep in mind, Rails 3 works best with Ruby 1.9.2. Ruby 1.9.2 fixes up quite a few bugs in 1.9.1 and is preferable to running 1.9.1.

With RVM installing 1.9.2 is a breeze.

OTHER TIPS

sudo apt-get install ruby1.9.1-full

(http://www.ruby-lang.org/en/downloads/)

After running

sudo apt-get install ruby1.9.1-full

It's solution is to run the following command:

sudo update-alternatives --config ruby

Then you will get this output:

   There are 2 choices for the alternative ruby (providing /usr/bin/ruby).

     Selection    Path                Priority   Status
   ------------------------------------------------------------
   * 0            /usr/bin/ruby1.8     50        auto mode
     1            /usr/bin/ruby1.8     50        manual mode
     2            /usr/bin/ruby1.9.1   10        manual mode

   Press enter to keep the current choice[*], or type selection number: 2
   update-alternatives: using /usr/bin/ruby1.9.1 to provide /usr/bin/ruby (ruby) in    manual mode.
   $ ruby --version
   ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]

Credit for this solution goes to person who answered https://askubuntu.com/questions/91693/how-do-you-uninstall-ruby-1-8-7-and-install-ruby-1-9-2 . Currently the ruby1.9.1 package is actually ruby 1.9.2.

The way I did it was to build it using checkinstall which lets you build a deb package. So I downloaded the Ruby 1.9.1 source, did a "configure" and then "make", did a "checkinstall" and made the package name ruby1.9 so it installs as if it were a new version of ruby 1.9 (as it should).

I got the Ruby specific info from this site. You can install most software in a different directory with the --prefix=/path switch. And it is common to install in /opt/ for everyone on your pc, or in $HOME if it is only for you.

For installing in /opt:

$ ./configure –prefix=/opt/ruby
$ make install

If you want to use the /opt installed ruby, edit you ~/.bashrc and add

export PATH=/opt/ruby/bin/:$PATH

If you don't want to have the custom Ruby build as default, you can add this to your ~/.bashrc instead of the former command

function setupruby {
     export PATH=/opt/ruby/bin/:$PATH
}

Here is a short and convenient way to install 1.9.1 and to make it default: http://michalf.me/blog:make-ruby-1-9-default-on-ubuntu-9-10-karmic-koala

I created a launchpad ppa for ruby 1.9.2. Details in the links below

http://www.humbug.in/2010/launchpad-ppa-for-ruby-1-9-2-and-some-ruby-bindings/

sudo add-apt-repository ppa:pratikmsinha/ruby192+bindings
cd /etc/apt/sources.list.d/; sudo mv pratikmsinha-ruby192+bindings-lucid.list pratikmsinha-ruby192bindings-lucid.list
sudo aptitude update
sudo aptitude install ruby1.9.2

Looking through Synaptic it seems like you don't even have to deal with the Multiverse or third-party repositories. But since sudo apt-get install ruby currently installs an alias to ruby1.8, you should install ruby1.9 explicitly – manually or via the repositories – and create the alias ruby yourself.

You may want to put the binary in /usr/bin since that's where the distribution would put it anyway. Anywhere on your PATH is fine, though.

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