[DRE-maint] Bug#867599: gem2deb fails to install pure ruby part when a gem has both pure ruby and native libs

[Antonio Terceiro]

On Sat, Jul 08, 2017 at 11:15:04AM -0300, Antonio Terceiro wrote:
> Control: severity -1 wishlist
> Control: retitle -1 gem2deb: support installing Ruby code not in lib/
> 
> On Sat, Jul 08, 2017 at 01:48:19PM +0530, Pirate Praveen wrote:
> > On 07/08/2017 11:53 AM, Pirate Praveen wrote:
> > > On 07/08/2017 07:44 AM, Antonio Terceiro wrote:
> > >> if the pure ruby libraries were not being installed, you would get a
> > >> LoadError (i.e. a `require` statement failed), but that's not what is
> > >> happening here.
> > > For tests, the pure ruby libs are available in the source tree.
> > > 
> > > If I move the src/ruby/lib folder (I have locally installed ruby-grpc
> > > deb), then it fails with `require': cannot load such file -- grpc
> > > (LoadError)
> > 
> > I think gem2deb expects libraries only in lib.
> 
> From what I see from the source code, grpc is a library with multiple
> language bindings; packaging it as a Ruby package is wrong. there is
> even already a grpc source package in Debian. you should send a patch to
> that package to generate a ruby-grpc binary package from there, instead
> of creating a new ruby-specific package.
> 
> your ruby-grpc has a lot of embedded code copies under third_party/,
> which has been already solved in grpc source package.
> 
> also, we can't possibly make gem2deb "just work" in such packages
> because they deviate a lot from what a standard ruby package looks like.
> 
> > s.require_paths = %w( src/ruby/lib src/ruby/bin src/ruby/pb ) mentions
> > it in grpc.gemspec but I don't know if gem2deb can reply on that.
> 
> gem2deb could be made to work with it, but I don't expect to get to it
> any time soon.

Thinking about it, we kind of already support this: when you use
--gem-install, this typo of thing should Just Work™.

> For now, I suggest that you
> 
> - drop your ruby-grpc
> - send a patch to the existing grpc source to produce a ruby-grcp binary
>   from it

I suggest that you use --gem-install when sending your patch to grpc, it
should do the right thing.

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