Multiple Versions of Ruby on same machine

ruby-talk
1

I'd like to include a complete version of Ruby, including all the
necessary libs, in the source tree for our internal app. That will
allow our unit tests/QA procedure/app deployment scripts to take
responsibility for upgrades to Ruby as well.

To do this, I of course need to include /usr/lib/ruby/* and
/usr/bin/ruby. And to set the PATH to use our local Ruby.

But it seems that I need to do more:
$ irb
irb(main):001:0> $:
=> ["/usr/lib/ruby/site_ruby/1.8",
"/usr/lib/ruby/site_ruby/1.8/i386-linux", "/usr/lib/ruby/site_ruby",
"/usr/lib/site_ruby/1.8", "/usr/lib/site_ruby/1.8/i386-linux",
"/usr/lib/site_ruby", "/usr/lib/ruby/1.8",
"/usr/lib/ruby/1.8/i386-linux", "."]

Where are those paths located? strings ruby didn't turn them up. I
need to be able to tell it to use the app's private ruby installation.

In general, has anyone done anything like this? What was their
experience? How would you recommend going about doing this?

2

Robert James wrote:

I'd like to include a complete version of Ruby, including all the
necessary libs, in the source tree for our internal app. That will
allow our unit tests/QA procedure/app deployment scripts to take
responsibility for upgrades to Ruby as well.

To do this, I of course need to include /usr/lib/ruby/* and
/usr/bin/ruby. And to set the PATH to use our local Ruby.

But it seems that I need to do more:
$ irb
irb(main):001:0> $:
=> ["/usr/lib/ruby/site_ruby/1.8",
"/usr/lib/ruby/site_ruby/1.8/i386-linux", "/usr/lib/ruby/site_ruby",
"/usr/lib/site_ruby/1.8", "/usr/lib/site_ruby/1.8/i386-linux",
"/usr/lib/site_ruby", "/usr/lib/ruby/1.8",
"/usr/lib/ruby/1.8/i386-linux", "."]

Where are those paths located? strings ruby didn't turn them up. I
need to be able to tell it to use the app's private ruby installation.

In general, has anyone done anything like this? What was their
experience? How would you recommend going about doing this?

It's compiled in at build time, I think. Check out ruby config.

I think I'd try building it from source and installing in a custom
directory for example /opt/myruby. Then when you install it on the
target machines you put it in the same place.

···

--
Posted via http://www.ruby-forum.com/\.

3

I'm not sure if this is applicable in your particular situation, but you can
change $: at runtime using the "shift" and "unshift" methods. You
could modify your Ruby scripts to change $: as the first thing they do,
so all the paths point to your local version of Ruby.

Wayne

···

On 1/1/07, S. Robert James <srobertjames@gmail.com> wrote:

I'd like to include a complete version of Ruby, including all the
necessary libs, in the source tree for our internal app.

---
Wayne Vucenic
No Bugs Software
Ruby, C# and Erlang Agile Contract Programming in Silicon Valley

4

S. Robert James wrote:

Where are those paths located? strings ruby didn't turn them up. I
need to be able to tell it to use the app's private ruby installation.

In general, has anyone done anything like this? What was their
experience? How would you recommend going about doing this?

  You can install Ruby anywhere by getting the source code and running
something like:

./configure --prefix=/your/favorite/directory
make
make install

  Then, you should make sure that the right version is used when running
your project. Make sure that:

  * this install of ruby is in the $PATH
  * your scripts include the full path to your ruby executable in the
#!... line

  Is that what you were looking for ?

  Vince

···

--
Vincent Fourmond, PhD student
http://vincent.fourmond.neuf.fr/

5

I don't really have any experience with this, but I think multiruby in
ZenTest does this, and you might be able to use it as a reference.

···

On 1/1/07, S. Robert James <srobertjames@gmail.com> wrote:

In general, has anyone done anything like this? What was their
experience? How would you recommend going about doing this?

6

Is there a similar method to use a different Ruby version with Rails?

···

On Tue, 2007-01-02 at 08:17 +0900, Vincent Fourmond wrote:

S. Robert James wrote:
> Where are those paths located? strings ruby didn't turn them up. I
> need to be able to tell it to use the app's private ruby installation.
>
> In general, has anyone done anything like this? What was their
> experience? How would you recommend going about doing this?

  You can install Ruby anywhere by getting the source code and running
something like:

./configure --prefix=/your/favorite/directory
make
make install

  Then, you should make sure that the right version is used when running
your project. Make sure that:

  * this install of ruby is in the $PATH
  * your scripts include the full path to your ruby executable in the
#!... line

  Is that what you were looking for ?

  Vince

7

i don't know how but i'm sure it is because i've only Rails under jRuby
which has it's own ruby install.

···

matt <matt@kettlewell.net> wrote:

Is there a similar method to use a different Ruby version with Rails?

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