From: Kane Williams <theburrick@...>
Date: 2011-06-18T20:12:38+09:00
Subject: Re: how would you set dynamically determined dependencies with or without bundler?

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> Date: Sat=2C 18 Jun 2011 18:45:32 +0900
> From: jarmo.p@gmail.com
> Subject: Re: how would you set dynamically determined dependencies with o=
r without bundler?
> To: ruby-talk@ruby-lang.org
>=20
> After playing around a little i found this solution to be the one i
> needed - in Gemfile:
>=20
> platforms :mswin=2C :mingw do
>   gem "win-specific-gem1"
>   gem "win-specific-gem2"
> end
>=20
> gem "gem3" # works on all platforms
>=20
> Now in my gem i just do require "win-specific-gemX" if the OS is win
> and on other's require "gem3". If there's any better solution then let
> me know of course :)
>=20
> Jarmo Pertman
> -----
> IT does really matter - http://www.itreallymatters.net
>=20
> On Jun 18=2C 10:21 am=2C Jarmo Pertman <jarm...@gmail.com> wrote:
> > Hi!
> >
> > I have developing a gem where some of it's dependencies are not
> > in .gemspec since they can be different depending of the value of
> > environment variable=2C class variable or just depending of the OS in
> > use. In short=2C these dependencies expose the same API=2C but can be
> > switched during runtime before actually loading the gem itself. The
> > gem then does something in the lines of:
> > require "rubygems"
> > gem "dependency"=2C "version"
> > require "dependency"
> >
> > depending of some criteria as written above. Now when using Bundler
> > with it's Bundler.setup invocation=2C what should be in Gemfile so it
> > would work the same on every configuration without having to have
> > modified Gemfile and Gemfile.lock on each different machine.
> >
> > Can i have different "gem" lines in Gemfile on different machines and
> > commit it actually into VCS without having to modify it on each and
> > every machine separately?
> >
> > Something in the Gemfile like this would work perfectly?
> > if RUBY_PLATFORM =3D~ /mswin|msys|mingw32/
> >   gem "dep1"
> > else
> >   gem "dep2"
> > end
> >
> > In that case "dep1" and "dep2" would end up in Gemfile.lock - is it
> > okay=2C even if dep1 is not installable on unix platform?
> >
> > Jarmo Pertman
> > -----
> > IT does really matter -http://www.itreallymatters.net
>=20
>=20
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