[DRE-maint] Bug#959393: Bug#959393: ruby2.7 breaks diaspora-installer autopkgtest: sh: 1: bundle: not found

[Antonio Terceiro]

On Sat, May 02, 2020 at 02:59:36PM +0200, Daniel Leidert wrote:
> Am Freitag, den 01.05.2020, 21:20 -0300 schrieb Antonio Terceiro:
> > Control: reassign -1 libruby2.7
> > Control: found -1 2.7.0-6
> > 
> > On Fri, May 01, 2020 at 09:12:57PM -0300, Antonio Terceiro wrote:
> > > Control: reassign -1 ruby2.7
> > > Control: found -1 2.7.0-6
> > > 
> > > On Fri, May 01, 2020 at 10:23:56PM +0200, Paul Gevers wrote:
> > > > Using system bundler...
> > > > Installing gems with rubygems ...
> > > > sh: 1: bundle: not found
> > > 
> > > libruby2.7 now has some Provides: for libraries builtin to the standard
> > > library, including ruby-bundler. But since ruby-bundler also provides a
> > > `bundle` binary, which libruby2.7 does not, then this Provides: is not
> > > really correct.
> > > 
> > > Instead, libruby2.7 should depend on ruby-bundler, like it already does on
> > > rake, ruby-test-unit and others, and not provide it.
> > 
> > It's on libruby2.7, not ruby2.7
> 
> The binary is in ruby2.7. IMHO our approach should be:
> 
> - ship a symlink /usr/bin/bundle -> /usr/bin/bundle2.7 with ruby(-defaults),
> - handle the symlink via dpkg-divert if ruby-bundler gets installed, and
> - keep the provides in libruby2.7.

the problem with this is that the binaries would be provided by
ruby(-defaults), and the actual Provides: would be in libruby2.7.
Although it would work, because there is a circular dependency between
libruby2.7 and ruby, it's not entirely correct.

FWIW, racc is in a similar situation: libruby2.7 Provides: ruby-racc,
but not the racc binary (provided by the racc package). There is no real
ruby-racc package though.

For now, I have commited a change to ruby to drop ruby-bundler from
Provides:, but we can revisit this later with a solution that is
consistent for bundler, racc, and any other package that ruby might
absorb that also contains a binary.
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