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comp.lang.ruby

Running Multiple Versions of Ruby on Debian?

John Griffiths

10/10/2008 4:06:00 PM

Well so far things are going kind of good, I've built my own server and
it's sitting in colo running Debian Etch and Ruby 1.8.6 (built from
source)

Now me being me I wouldn't mind running 1.8.7 alongside 1.8.6 for my
Rails blogging software.

Has anyone had any experiences in running multiple versions of Ruby on
Debian Etch?

I found one article which explains how to run 3 using
update-alternatives but pretty unsure if it'll adapt well to Debian,

http://blog.michaelgreenly.com/2008/08/multiple-versions-of-ruby-on-ubu...

Seems possible, especially using:

./configure --prefix=/opt/ruby-1.8.7-p71

To set where to install the Ruby version, I'm imagining I'd have to run
gem --update like,

/opt/ruby-1.8.7-p71/bin/gem --update
or
/opt/ruby-1.8.7-p71/bin/gem install rails

to install the necessary gems per ruby install without touching the one
in /usr/bin/ruby,

then i'm imagining,

/opt/ruby-1.8.7-p71/bin/thin start -C /var/www/apps/myapp/thin.conf
...to start the thin webserver with my config file

Will try out on a virtual machine first, but am i on the right track or
is there something better?
--
Posted via http://www.ruby-....
4 Answers

Stefano Crocco

10/10/2008 4:11:00 PM

0

Alle Friday 10 October 2008, John Griffiths ha scritto:
> Well so far things are going kind of good, I've built my own server and
> it's sitting in colo running Debian Etch and Ruby 1.8.6 (built from
> source)
>
> Now me being me I wouldn't mind running 1.8.7 alongside 1.8.6 for my
> Rails blogging software.
>
> Has anyone had any experiences in running multiple versions of Ruby on
> Debian Etch?
>
> I found one article which explains how to run 3 using
> update-alternatives but pretty unsure if it'll adapt well to Debian,
>
> http://blog.michaelgreenly.com/2008/08/multiple-versions-of-ruby-...
>2.html
>
> Seems possible, especially using:
>
> ./configure --prefix=/opt/ruby-1.8.7-p71
>
> To set where to install the Ruby version, I'm imagining I'd have to run
> gem --update like,
>
> /opt/ruby-1.8.7-p71/bin/gem --update
> or
> /opt/ruby-1.8.7-p71/bin/gem install rails
>
> to install the necessary gems per ruby install without touching the one
> in /usr/bin/ruby,
>
> then i'm imagining,
>
> /opt/ruby-1.8.7-p71/bin/thin start -C /var/www/apps/myapp/thin.conf
> ...to start the thin webserver with my config file
>
> Will try out on a virtual machine first, but am i on the right track or
> is there something better?

I'd also suggest to pass configure the --program-prefix or --program-suffix
arguments. This way, you can call the ruby 1.8.7 executable ruby187, instead
of just ruby and you won't have to use its full path every time you want to
use it. The same happens with the other executables, like irb and ri.

Stefano

Hassan Schroeder

10/10/2008 4:21:00 PM

0

On Fri, Oct 10, 2008 at 9:05 AM, John Griffiths <indiehead@gmail.com> wrote:

> Seems possible, especially using:
>
> ./configure --prefix=/opt/ruby-1.8.7-p71
>
> To set where to install the Ruby version, I'm imagining I'd have to run
> gem --update like,
>
> /opt/ruby-1.8.7-p71/bin/gem --update

> is there something better?

I just create files with appropriate PATH settings, like
------------------------------------------------------------
export RUBY_HOME=/opt/ruby-1.8.7-p71
PATH=$RUBY_HOME/bin:$PATH
------------------------------------------------------------
Name them sensibly, and you can just type, e.g.
prompt% . 187
to source, and voila! No need to enter the entire path, or remember
to use a different name.

FWIW,
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com

John Griffiths

10/10/2008 4:22:00 PM

0

Thanks Stefano,

so if i were to do,

/configure --prefix=/opt/ruby-1.8.7-p71 --program-suffix=187

to make ruby187 point to /opt/ruby-1.8.7-p71/ruby ?
--
Posted via http://www.ruby-....

Stefano Crocco

10/10/2008 4:26:00 PM

0

Alle Friday 10 October 2008, John Griffiths ha scritto:
> Thanks Stefano,
>
> so if i were to do,
>
> ./configure --prefix=/opt/ruby-1.8.7-p71 --program-suffix=187
>
> to make ruby187 point to /opt/ruby-1.8.7-p71/ruby ?

It doesn't create a symlink. It will change the name of the ruby executable:
not

/opt/ruby-1.8.7-p71/ruby

but

/opt/ruby-1.8.7-p71/ruby187

If you then put /opt/ruby-1.8.7-p71 in your PATH, you'll be able to use
ruby187 to call the new version and ruby to call the old version.

Stefano