Versioned bottles?

[carlobaldassi]

(Sorry if this is a trivial question, but I know nothing about Homebrew.)
I wanted to update GLPK.jl to use the latest version of the underlying library (from 4.52 to 4.54). The problem is that since libglpk does not guarantee backwards API/ABI compatibility, I require a specific version of the library in the Julia package.
However, the current rule for Homebrew in GLPK.jl is

provides(Homebrew.HB, "glpk", glpkdep, os = :Darwin)

Is it possible to have different versions of libglpk bottled, such that different releases of GLPK.jl keep working?

[staticfloat]

Homebrew isn't really designed for multiple simultaneous versions. The best they do is making specific formulae for the versions, e.g. llvm33 to install llvm-3.3.

Right now only 4.52 is supported, and once Homebrew supports 4.54, they will likely drop support for 4.52 completely, and move over to 4.54. That being said, I can "freeze" the version of glpk if you need it, or create a glpk454 formula, or whatever you need. So if you just let me know what you need, we can work together to make it happen.

[carlobaldassi]

Thanks! I think that having glpk-4.52 and glpk-4.54 formulas (etc.) is the only way multiple versions of GLPK.jl can be made to work.

[staticfloat]

And multiple versions of glpk are necessary? Okay. I'll archive the current glpk formula as glpk-4.52 and see if I can't make a glpk-4.54 sometime soon.

[carlobaldassi]

Thanks a lot! Also, if it's something I can do on my own (from Linux) I'd be happy to do it / maintain it.

[staticfloat]

Can you go ahead and get ready to update all your packages that currently require glpk to instead require glpk452?

[carlobaldassi]

Wouldn't that leave all previous versions is an unusable state?

[staticfloat]

Anybody that already has glpk installed will continue to have it installed, and I'm keeping the glpk name around for a while longer, but if we're going to version one name, we should version all the names.

[carlobaldassi]

Yes, leaving the glpk name around was what I had in mind. If we remove it, we might as well "retire" all versions of GLPK.jl which use it from METADATA.

I have updated the rule to use the versioned name in a branch.

[carlobaldassi]

If we remove it, we might as well "retire" all versions of GLPK.jl which use it from METADATA.

Actually, thinking about it a little more, people who want to downgrade for some reason, or use a particular snapshot, could still resort to compiling from source, so that's not the case.
Moving forward, versioned formulas are still the only sane option to interact with Pkg though.

[staticfloat]

I'm now retiring glpk. We still have glpk452 and glpk454 around, and it looks like glpk452 is still used by default.