Installing merb with jruby

Ruby JRuby
1

I am having problems installing the merb gem with jruby:

==============
c:>jruby -S gem install merb
Building native extensions. This could take a while…
ERROR: Error installing merb:
ERROR: Failed to build gem native extension.

C:/lang/jruby-1.1.5/bin/jruby.bat extconf.rb install merb
C:/lang/jruby-1.1.5/lib/ruby/1.8/mkmf.rb:7: JRuby does not support
native extensions. Check
wiki.jruby.org for alternatives. (NotImplementedError)
from C:/lang/jruby-1.1.5/lib/ruby/1.8/mkmf.rb:21:in `require’
from extconf.rb:21

Gem files will remain installed in
C:/lang/jruby-1.1.5/lib/ruby/gems/1.8/gems/do_sqlite3-0.
9.6 for inspection.
Results logged to
C:/lang/jruby-1.1.5/lib/ruby/gems/1.8/gems/do_sqlite3-0.9.6/ext/gem_make.
out

Based on this blog entry:

http://weblogs.java.net/blog/arungupta/archive/2008/04/merb_on_jruby_1.html

it appears I should be able to install merb this way. Other than that I
couldn’t find much on running jruby and merb (or at least how to install
it).

Could someone point me in the right direction?

Thanks in advance,

Eric

2

Merb has been moving in and out of Jruby compatibility. Right now, the
Merb gem includes datamapper, which includes do_sqlite, which includes
native extensions. However, you don’t need that for merb programs. If
you run

gem install merb-core
gem install merb-more

that should work. At the very least, I know that merb-core is pure ruby,
and you can probably pick out the gems from merb-more that you want.

Eric Ching wrote:

native extensions. Check
out
Could someone point me in the right direction?

Thanks in advance,

Eric

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3

Thanks, I’ll it out.

I don’t even have MRI installed, JRuby is just too good. :wink:

4

One problem you’ll run into is this:

http://merb.lighthouseapp.com/projects/7433-merb/tickets/987-problems-with-templater-jruby-115-merb-10

There’s a workaround there involving a small change to the templater
gem, and another workaround would be to use MRI for generation. I’m
looking into the actual JRuby issue here:

http://jira.codehaus.org/browse/JRUBY-3131

But Yehuda agrees this probably should be fixed in templater, since it
doesn’t work in 1.9 either.

  • Charlie

Eric Ching wrote:

Merb gem includes datamapper, which includes do_sqlite, which includes

I am having problems installing the merb gem with jruby:
wiki.jruby.org for alternatives. (NotImplementedError)
out

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