On Wed, 21 May 2014 19:52:00 +0200
Johannes Kastl <[email protected]> wrote:

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> 
> Hi everyone,
> 
> I have a funny issue with a dependency from a rubygem, depending on
> another rubygem:
> 
> > $ LANG=POSIX sudo zypper in rubygem-jekyll Loading repository
> > data... Reading installed packages... Resolving package
> > dependencies...
> > 
> > Problem: nothing provides rubygem(2.0.0:liquid:2.5) >= 2.5.5 needed
> > by rubygem-jekyll-2.0.3-3.2.x86_64 Solution 1: do not install
> > rubygem-jekyll-2.0.3-3.2.x86_64 Solution 2: break
> > rubygem-jekyll-2.0.3-3.2.x86_64 by ignoring some of its
> > dependencies
> > 
> > Choose from above solutions by number or cancel [1/2/c] (c): ^C $
> > LANG=POSIX sudo zypper in rubygem-liquid Loading repository
> > data... Reading installed packages... Resolving package
> > dependencies...
> > 
> > The following NEW package is going to be installed: rubygem-liquid
> > 
> > 
> > 1 new package to install. Overall download size: 76.0 KiB. After
> > the operation, additional 116.3 KiB will be used. Continue? [y/n/?
> > shows all options] (y): ^C
> 
> So jekyll depends on liquid, and I can install liquid. liquid is
> version 2.6.1, so it should satisfy jekyll's dependency on liquid
> > =2.5.5? Or am I missing something?

actually no, as require is
rubygem(2.0.0:liquid:2.5)

which means
ruby version 2.0.0, gem liquid and major version 2.5  and >= 2.5.5
means that any version with between 2.5.4 and 2.6.0 satisfy it.
It is our workaround for rubygem operator ~> which do what I describe
above. For details see
http://stackoverflow.com/questions/5170547/what-does-tilde-greater-than-mean-in-ruby-gem-dependencies

Josef

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