Problem with ruby1.9.2 and gems on Debian

ruby-talk
1

Hi,
I installed rubygems 1.3.7, then decided to upgrade from ruby1.8 to ruby1.9.2.

I forgot to uninstall rubygems before installing ruby1.9.2, as I didn't realise gems came with it.

Now I want to install some gems, but when I run 'gem install rails' I get the following error.

ERROR: Loading command: install (LoadError)
     no such file to load -- zlib
ERROR: While executing gem ... (NameError)
     uninitialized constant Gem::Commands::InstallCommand

Can I repare 'gems? If not should I remove ruby1.9.2, rubygems1.3.7 and start again?

It may be worth mentioning that I built these packages on Debian Lenny from source, and they are not in the database used by 'apt' etc.

I have tried removing all traces of Ruby and rubygems from the system, then rebuilding and installing ruby1.9.2

Thanks,
Jen.

2

possibly you just need to do the following to add the missing zlib header files:

sudo aptitude install zlib1g-dev

you might also want to add these header files(if you have not already)

sudo aptitude install libc6-dev libssl-dev
sudo aptitude install libreadline6-dev zlib1g-dev libsqlite3-dev

once you have a working ruby install rails and sqlite3

sudo gem install rails
sudo gem install sqlite3-ruby

···

On 10-10-24 04:17 PM, Jen wrote:

Hi,
I installed rubygems 1.3.7, then decided to upgrade from ruby1.8 to
ruby1.9.2.

I forgot to uninstall rubygems before installing ruby1.9.2, as I didn't
realise gems came with it.

Now I want to install some gems, but when I run 'gem install rails' I
get the following error.

ERROR: Loading command: install (LoadError)
no such file to load -- zlib
ERROR: While executing gem ... (NameError)
uninitialized constant Gem::Commands::InstallCommand

Can I repare 'gems? If not should I remove ruby1.9.2, rubygems1.3.7 and
start again?

It may be worth mentioning that I built these packages on Debian Lenny
from source, and they are not in the database used by 'apt' etc.

I have tried removing all traces of Ruby and rubygems from the system,
then rebuilding and installing ruby1.9.2

Thanks,
Jen.

--
Kind Regards,
Rajinder Yadav | DevMentor.org | Do Good! ~ Share Freely

GNU/Linux: 2.6.35-22-generic
Kubuntu x86_64 10.10 | KDE 4.5.1
Ruby 1.9.2p0 | Rails 3.0.1

3

Hi,

Managed to gget gems working. I had a bit of a problem with aptitude not removing everything I expected it to, so after a bit of playing I got it working with ruby-1.9.2.

Now I've got some other issues with my rails app, but I'll post to a more specific rails forum.

Thanks,
Jen.

···

On 25/10/10 08:35, Rajinder Yadav wrote:

On 10-10-24 04:17 PM, Jen wrote:

Hi,
I installed rubygems 1.3.7, then decided to upgrade from ruby1.8 to
ruby1.9.2.

I forgot to uninstall rubygems before installing ruby1.9.2, as I didn't
realise gems came with it.

Now I want to install some gems, but when I run 'gem install rails' I
get the following error.

ERROR: Loading command: install (LoadError)
no such file to load -- zlib
ERROR: While executing gem ... (NameError)
uninitialized constant Gem::Commands::InstallCommand

Can I repare 'gems? If not should I remove ruby1.9.2, rubygems1.3.7 and
start again?

It may be worth mentioning that I built these packages on Debian Lenny
from source, and they are not in the database used by 'apt' etc.

I have tried removing all traces of Ruby and rubygems from the system,
then rebuilding and installing ruby1.9.2

Thanks,
Jen.

possibly you just need to do the following to add the missing zlib header files:

sudo aptitude install zlib1g-dev

you might also want to add these header files(if you have not already)

sudo aptitude install libc6-dev libssl-dev
sudo aptitude install libreadline6-dev zlib1g-dev libsqlite3-dev

once you have a working ruby install rails and sqlite3

sudo gem install rails
sudo gem install sqlite3-ruby