From: Pau Garcia i Quiles <pgquiles@...>
Date: 2006-06-20T20:06:38+09:00
Subject: Re: Installing irb in Ubuntu

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On Tuesday 20 June 2006 13:00, Jon Lim wrote:

No, that will install ruby 1.8.2:

pgquiles@enigma:~$ apt-cache show irb | grep Version
Version: 1.8.2-1
pgquiles@enigma:~$ apt-cache show ruby | grep Version
Version: 1.8.2-1

You need the *1.8 packages:

pgquiles@enigma:~$ apt-cache show ruby1.8 | grep Version
Version: 1.8.4-1ubuntu1
pgquiles@enigma:~$ apt-cache show irb1.8 | grep Version
Version: 1.8.4-1ubuntu1

> IIRC that is was just poor naming on the meta packages.
> Dapper does ship with ruby 1.8.4
>
> $ sudo apt-get install irb ruby
>
> will install the 1.8.4 versions
>
> On 20/06/06, Pau Garcia i Quiles <pgquiles@elpauer.org> wrote:
> > On Tuesday 20 June 2006 08:48, Minkoo Seo wrote:
> > > Hi.
> > >
> > > I've installed Ubuntu Dapper in my desktop. To my disappoint it doesn=
't
> > > have ruby preinstalled. That's still okay, because I can do it by
> > > myself.
> > >
> > > I've apt-get install ruby. Then, I've apt-get install irb1.8 because
> > > I've installed
> > > ruby1.8. Surprisingly, irb command did not work. It turned out that I
> > > also have to apt-get install irb to run irb command.
> > >
> > > I can't figure out why things are working in this way. Does it make
> > > sense to apt-get twice just for irb? Or is this my own problem and not
> > > of ubuntu packages?
> > >
> > > If it's true that we have to apt-get install irb irb1.8 just for irb
> > > command,
> > > is there any way to fix such a non-intuitive installation procedure?
> > >
> > > Sincerely,
> > > Minkoo Seo
> >
> > Actually, you got it completely wrong. Explanation and fix follows.
> >
> > If you run 'apt-cache show irb' and 'apt-cache show irb1.8' you'll see
> > Ubuntu Dapper ships with two different Ruby versions: packages ruby, ir=
b,
> > ri, rdoc, etc are Ruby 1.8.2 and packages ruby1.8, irb1.8, ri1.8,
> > rdoc1.8, etc are Ruby 1.8.4. I guess the reason to ship two different
> > versions is some dependency problem, but I think that was a very wrong
> > decision.
> >
> > Therefore, you now have two different irb versions installed: 1.8.2 and
> > 1.8.4 and I'm pretty sure you don't want that. I guess you want Ruby
> > 1.8.4. What do you do?
> > 1. First of all, remove the 1.8.2 versions (irb, ri, ruby, rdoc, etc).
> > You may want to use dpkg --print-avail <packagename> to find out the
> > version information for an already-installed package. You may want to u=
se
> > dpkg --get-selections to get a full list of packages installed on your
> > computer.
> >
> > 2. Install the 1.8.4 versions (ruby1.8, irb1.8, rdoc1.8, etc). Now you'=
ll
> > have /usr/bin/ruby1.8, /usr/bin/irb1.8, etc
> >
> > 3. Use update-alternatives to install symlinks for easy access:
> >
> >    # update-alternatives --install /usr/bin/irb irb /usr/bin/irb1.8 10
> >
> >    This is a per-system (not per-user) setting. You might want to take a
> > look at man update-alternatives to know the meaning of each option and
> > how to reconfigure it later.
> >
> >   You can just create symlinks instead of using update-alternatives, but
> > update-alternatives has some advantages (easy management, automanagement
> > when you install a package that provides the the "alternative", etc).
> >
> > Debian Testing and Debian Sid have both Ruby 1.8.2 and Ruby 1.8.4, too.
> >
> > Lastly, some people have said it's impossible to install rails in Ubunt=
u.
> > That's not true. There is a 'rails' package, it's up-to-date (1.1.2) and
> > it's in the 'universe' repository. You may need to edit your
> > /etc/apt/sources.list file.
> >
> > --
> > Pau Garcia i Quiles
> > http://www.elpauer.org
> > (Due to the amount of work, I usually need 10 days to answer)

=2D-=20
Pau Garcia i Quiles
http://www.elpauer.org
(Due to the amount of work, I usually need 10 days to answer)

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