From: Sam Duncan <sduncan@...>
Date: 2012-10-11T14:15:44+09:00
Subject: Re: How get list of all installed modules/gems in ruby

On 10/11/2012 06:10 PM, Abhishek K. wrote:
> Thanks.
>
> I want this in ruby code.
>
> above is not working for ruby1.8.7 but working for 1.9.2, is there any
> way whichworks for all versions of ruby?
>
>
> ruby-1.8.7 -e 'puts Gem::Specification.all().map{|g| [g.name,
> g.version.to_s] }'
> -e:1: uninitialized constant Gem (NameError)
>
>
> ruby-1.9.2 -e 'puts Gem::Specification.all().map{|g| [g.name,
> g.version.to_s] }'
> NOTE: Specification.all called from -e:1:in `<main>'
> minitest
> 1.6.0
> rake
> 0.8.7
> rdoc
> 2.5.8
> ruby-graphviz
> 1.0.8
> ruby-oci8
> 2.1.2
> rubygems-update
> 1.8.24
> sequel
> 3.37.0
>

Try running it like this;

ruby-1.8.7 -rubygems -e 'puts Gem::Specification.all().map{|g| [g.name, 
g.version.to_s] }'

Sam