On 3/17/07, Eric Hodel <[EMAIL PROTECTED]> wrote:
> 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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>
Thanks, this looks much closer to what I was hoping. My goal is to (in
an automated fashion), build a binary gem, save all of the generated
files and the original gem into a platform specific gem, that can then
be installed on servers without a C compiler.
Thanks
pth
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