I had a working Rails setup using RVM on Ubuntu 11.10 with /home on a
separate partition. I installed Ubuntu 12.04 (Alpha) on the root
partition, leaving the home partition unchanged. I now find that some
things don't work, I think due to the fact that the system has been
updated and versions of libraries have changed. For example I get:
$ rails c
/home/colinl/.rvm/gems/ruby-1.8.7-p302/gems/mysql2-0.3.10/lib/mysql2/mysql2.so:
libmysqlclient_r.so.16: cannot open shared object file: No such file
or directory - /home/colinl/.rvm/gems/ruby-1.8.7-p302/gems/mysql2-0.3.10/lib/mysql2/mysql2.so
(LoadError)
I uninstalled gem mysql2 then did bundle install, which re-installed
mysql2 (the same version) with its native extensions and this fixed
the problem. I think (but may be corrected) that I need to re-install
any gems that have native extensions in each of my projects. As I
don't know which have native extensions what I would like to do is
just to remove them all and then run bundle install to reinstall them.
I can't find a method of uninstalling them however. Any suggestions?
Colin
Hi Colin,
If I understand your request correctly, you are asking for
rvm gemset empty <gemset name> ? Or did I misunderstand?
Below I show a log of bundle install, rvm gemset empty and bundle install
HTH,
Peter
I had a working Rails setup using RVM on Ubuntu 11.10 with /home on a
separate partition. I installed Ubuntu 12.04 (Alpha) on the root
partition, leaving the home partition unchanged. I now find that some
things don't work, I think due to the fact that the system has been
updated and versions of libraries have changed. For example I get:
$ rails c
/home/colinl/.rvm/gems/ruby-1.8.7-p302/gems/mysql2-0.3.10/lib/mysql2/mysql2.so:
libmysqlclient_r.so.16: cannot open shared object file: No such file
or directory -
/home/colinl/.rvm/gems/ruby-1.8.7-p302/gems/mysql2-0.3.10/lib/mysql2/mysql2.so
(LoadError)
I uninstalled gem mysql2 then did bundle install, which re-installed
mysql2 (the same version) with its native extensions and this fixed
the problem. I think (but may be corrected) that I need to re-install
any gems that have native extensions in each of my projects. As I
don't know which have native extensions what I would like to do is
just to remove them all and then run bundle install to reinstall them.
I can't find a method of uninstalling them however. Any suggestions?
Hi Colin,
If I understand your request correctly, you are asking for
`rvm gemset empty <gemset name>` ? Or did I misunderstand?
That's the one, thanks. I was looking for it as part of bundle but
you are right, emptying the gemset is what I want to do.
Below I show a log of `bundle install`, `rvm gemset empty` and `bundle
install`
After the empty I had to "gem install bundler" before "bundle install"
as it took that out too. Otherwise exactly as you show. Many thanks
Colin
Below I show a log of bundle install, rvm gemset empty and `bundle
install`
After the empty I had to “gem install bundler” before “bundle install”
as it took that out too. Otherwise exactly as you show.
That’s because I installed the “bundler” gem in my “global” gemset (IIRC).
So, when I create a new gemset, the new gemset automatically has
2 gems it reuses from that global gemset. It’s a neat trick 
peterv@ASUS:~$ rvm gemset use global
Using /home/peterv/.rvm/gems/ruby-1.9.3-p0 with gemset global
peterv@ASUS:~$ gem list
*** LOCAL GEMS ***
bundler (1.0.21)
rake (0.9.2.2)
peterv@ASUS:~$ rvm gemset create new_gemset
‘new_gemset’ gemset created (/home/peterv/.rvm/gems/ruby-1.9.3-p0@new_gemset).
peterv@ASUS:~$ rvm gemset use new_gemset
Using /home/peterv/.rvm/gems/ruby-1.9.3-p0 with gemset new_gemset
peterv@ASUS:~$ gem list
*** LOCAL GEMS ***
bundler (1.0.21)
rake (0.9.2.2)
Many thanks
You’re very welcome,
Peter