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-   -   Debian: coexistence of debs and gems? (http://www.velocityreviews.com/forums/t821508-debian-coexistence-of-debs-and-gems.html)

Michael Schuerig 05-04-2005 06:12 AM

Debian: coexistence of debs and gems?
 

I'm using Debian/Linux and have come upon tough rock while digging for
rubies. Debian, like most Linux distos, manages installed software with
a package management system. Ruby as well as several libs including
Rails, in particular, are available as packages. That's great as it is.
Nevertheless, of course there are libs that are not available as debian
packages, but are available as gems.

Installing RubyGems is quick and easy, but from there on, I'm stuck with
two problems:

* Files from gems are installed below /usr where they get intermixed
with files from regular debian packages. I'd much prefer gems being
installed below /usr/local.

* RubyGems does its own dependency management and is ignorant of
anything installed as debian packages. As an effect, when I try to
install a gem that depends on Rails, RubyGems wants to install the
Rails gem, even though Rails is already installed.

Is there a way to make these to package managers play nicely?

Michael

--
Michael Schuerig Not only does lightning not strike
mailto:michael@schuerig.de twice, it usually doesn't strike once.
http://www.schuerig.de/michael/ --Salman Rushdie, Fury


Friday 05-04-2005 08:32 AM

Re: Debian: coexistence of debs and gems?
 
Michael Schuerig wrote:
> I'm using Debian/Linux and have come upon tough rock while digging for
> rubies. Debian, like most Linux distos, manages installed software with
> a package management system. Ruby as well as several libs including
> Rails, in particular, are available as packages. That's great as it is.
> Nevertheless, of course there are libs that are not available as debian
> packages, but are available as gems.
>
> Installing RubyGems is quick and easy, but from there on, I'm stuck with
> two problems:
>
> * Files from gems are installed below /usr where they get intermixed
> with files from regular debian packages. I'd much prefer gems being
> installed below /usr/local.
>
> * RubyGems does its own dependency management and is ignorant of
> anything installed as debian packages. As an effect, when I try to
> install a gem that depends on Rails, RubyGems wants to install the
> Rails gem, even though Rails is already installed.
>
> Is there a way to make these to package managers play nicely?
>
> Michael
>


I'm also grappling with this issue. For now, I'm using gems when the
corresponding Debian package does not exist. As ruby grows more
popular, I'm sure this strategy will rear its ugly head.

Maybe the best solution is to have a new tool that wraps both gems and
the OS's package manager. This will allow gems to grow while ignoring
the complexities of supporting apt, yum, etc. And it will allow the
wrapper to add support for package managers other than apt.

Luke Graham 05-04-2005 08:41 AM

Re: Debian: coexistence of debs and gems?
 
On 5/4/05, Friday <spamtrap@caretaker.dolphins.ch> wrote:
> Michael Schuerig wrote:
> > I'm using Debian/Linux and have come upon tough rock while digging for
> > rubies. Debian, like most Linux distos, manages installed software with
> > a package management system. Ruby as well as several libs including
> > Rails, in particular, are available as packages. That's great as it is.
> > Nevertheless, of course there are libs that are not available as debian
> > packages, but are available as gems.
> >
> > Installing RubyGems is quick and easy, but from there on, I'm stuck with
> > two problems:
> >
> > * Files from gems are installed below /usr where they get intermixed
> > with files from regular debian packages. I'd much prefer gems being
> > installed below /usr/local.
> >
> > * RubyGems does its own dependency management and is ignorant of
> > anything installed as debian packages. As an effect, when I try to
> > install a gem that depends on Rails, RubyGems wants to install the
> > Rails gem, even though Rails is already installed.
> >
> > Is there a way to make these to package managers play nicely?
> >
> > Michael
> >

>
> I'm also grappling with this issue. For now, I'm using gems when the
> corresponding Debian package does not exist. As ruby grows more
> popular, I'm sure this strategy will rear its ugly head.
>
> Maybe the best solution is to have a new tool that wraps both gems and
> the OS's package manager. This will allow gems to grow while ignoring
> the complexities of supporting apt, yum, etc. And it will allow the
> wrapper to add support for package managers other than apt.


I have not used Debian, but Gentoo packages could simply wrap gems, so
that when a package is installed, ruby-gems is used to grab the files,
and effectively both systems know about the package being installed.
Its much better than using yet another tool. Of course, this means that
all interaction with gems would be through portage. It should be possible
to auto-update the list of gems that portage knows about too, maybe
another little script could do that. A simpler way would be to just distribute
the ebuilds for each gem.

--
spooq




Paul van Tilburg 05-04-2005 10:31 PM

Re: Debian: coexistence of debs and gems?
 
On Wed, May 04, 2005 at 03:14:52PM +0900, Michael Schuerig wrote:
> Installing RubyGems is quick and easy, but from there on, I'm stuck with
> two problems:
>
> * Files from gems are installed below /usr where they get intermixed
> with files from regular debian packages. I'd much prefer gems being
> installed below /usr/local.


A libgems-ruby/rubygems package is currently in preparation (by Daigo
Woriwaki) and I am checking it out for uploading/sponsoring it.
There are however some outstanding issues (see your point below).
See also:
http://lists.debian.org/debian-ruby/.../msg00017.html

> * RubyGems does its own dependency management and is ignorant of
> anything installed as debian packages. As an effect, when I try to
> install a gem that depends on Rails, RubyGems wants to install the
> Rails gem, even though Rails is already installed.


This has been discussed on the Debian Ruby list before,
please refer to:
http://lists.debian.org/debian-ruby/.../msg00009.html

> Is there a way to make these to package managers play nicely?


The conclusion is, is that it is very hard, but there might be a
solution out there.

Greetings,

Paul

--
Student @ Eindhoven | email: paulvt@debian.org
University of Technology, The Netherlands | JID: paul@luon.net
>>> Using the Power of Debian GNU/Linux <<< | GnuPG key ID: 0x50064181




Michael Schuerig 05-05-2005 06:29 AM

Re: Debian: coexistence of debs and gems?
 
Paul van Tilburg wrote:

> Debian Ruby list


Thanks for pointing me to this list. I assumed there might exist one,
but never made sure. Now I know and subscribed.

Re dpkg/gems: as there's obviously work being done on it already, I'll
be happy to see what becomes of it.

Michael

--
Michael Schuerig Life is just as deadly
mailto:michael@schuerig.de As it looks
http://www.schuerig.de/michael/ --Richard Thompson, Sibella



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