How can I install ruby193 gems on CentOS 6 with softwarecollections (SCL)?

[Stefan Lasiewski]

Hello,

I have a CentOS 6 system running Puppet 3.8, and I use SCL (Software Collections) to install some packages like http24 and ruby193.

I am having trouble using Puppet's gem provider to install gems with ruby193.

I have a manifest like this:

  package { ['ruby193', 'ruby193-ruby-devel', 'ruby193-rubygem-bundler']:                                        
    ensure  => present,                                                                                          
    require => Class['::company_yum::softwarecollections'],                                                        
  }                                                                                                              
  # Install Compass for webapp                                                                            
  package { ['sass', 'compass']:                                                                                
    ensure   => 'installed',                                                                                    
    provider => 'gem',                                                                                          
    require  => Package['ruby193-ruby-devel'],                                                                  
  }

 

But it seems that Puppet does not know about the location of the ruby193-ruby-devel headers, and I would need to use the SCL version of ruby193 gem, not /usr/bin/gem.

Notice: /Stage[main]/Class_webhost::Silverstripe/Package[ruby193-ruby-devel]/ensure: created

Error: Execution of '/usr/bin/gem install --no-rdoc --no-ri compass' returned 1: ERROR:  Error installing compass:

        ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb

mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/ffi-1.9.10 for inspection.

Results logged to /usr/lib/ruby/gems/1.8/gems/ffi-1.9.10/ext/ffi_c/gem_make.out

Building native extensions.  This could take a while...

Error: /Stage[main]/Class_webhost::Silverstripe/Package[compass]/ensure: change from absent to present failed: Execution of '/usr/bin/gem install --no-rdoc --no-ri compass' returned 1: ERROR:  Error installing compass:

        ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb

mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/ffi-1.9.10 for inspection.

Results logged to /usr/lib/ruby/gems/1.8/gems/ffi-1.9.10/ext/ffi_c/gem_make.out

Building native extensions.  This could take a while...

...

Notice: Finished catalog run in 50.02 seconds

The ruby193-ruby-devel headers live under /opt/rh/ruby193/ :

[root@webhost ~]# find /opt/rh/ruby193/root/ -name ruby.h
/opt/rh/ruby193/root/usr/include/ruby/ruby.h
/opt/rh/ruby193/root/usr/include/ruby.h
[root@webhost ~]#

How can I use the Puppet gem provider to work with ruby193 installed by SCL?

Thanks,

-= Stefan

[Stefan Lasiewski]

From the silence, I'm going to guess that the gem provider cannot install gems from Ruby installed from the Software Collections.

I did find a somewhat-related bug: '[PUP-3613] Add a parameter to the exec resource to support running commands in software collections without always using "scl enable"'

-= Stefan

[Ilja Bobkevic]

I guess you're left with doing exec. Something like this should work:

    exec { 'ruby193_scl_install_blah':

      command => "scl enable ruby193 'gem install --bindir /usr/bin --no-rdoc --no-ri blah'",
      path    => ['/bin','/usr/bin'],
      unless  => "scl enable ruby193 'gem list'| grep -qs blah"
    }

There might be already defined type for it out there (e.g. https://forge.puppetlabs.com/treydock/scl)

// Ilja