On Mar 14, 2007, at 14:47, Patrick Hurley wrote:
> Sorry, if I should have been able to find some docs to point me in the
> right direction, but so far here is what I figured out from trial and
> error and some source code reading.
>
> I want to unpack a gem already on my machine:
> gem unpack a_gem
>
> Then I want to retrieve the gem spec
> gem specification a_gem
>
> (then more stuff but this will get me started)
>
> So far I have the simple code:
>
> require "rubygems"
> Gem.manage_gems
>
> if gem = ARGV.first
> puts "Processing #{gem}"
> runner = Gem::GemRunner.new
> puts "Unpack #{gem}"
> runner.run ['unpack', gem]
> runner.run(['specification', gem])
> end
>
> This works; however, the run command displays to the screen. Is there
> an easy way to capture its output? I see there is a default interface
> object, with a method called say I could grab, but that seems pretty
> messy. I could also grab the stdout handle and play games there, but
> again, I feel I am missing something.
Don't use the runner interface at all, it doesn't do anything you
need, and adds a bunch of crap you don't (redirecting output).
Just call the Gem::Installer#unpack method directly.
$ ri Gem::Installer#unpack
-------------------------------------------------- Gem::Installer#unpack
unpack(directory)
------------------------------------------------------------------------
Unpacks the gem into the given directory.
Just use to_yaml or to_ruby on Gem::Specification.
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