DLL problems, episode 2

General Usage
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Hi @Ralph_Smith @StefanKarpinski ,

I feel your pain about:
"DLL problems, episode 2”
aka “DLL Hell I’ve seen many times BEFORE”
aka “NameSpace Collision”
aka “Real Coders ONLY work on the Command Line and Link Code with Deer sinews, Tobacco Juice and a smirk”
aka “No One wants to admit their new software baby has some ugly features that need fixed”
Yes – as a professional software engineer of many years I have heard and seen it all ; oh and I’ll add one more “The CMM Level Zero (0) Hero who is FOREVER putting out EXACTLY as many fires as they start”

Issue: At least as of v0.7 Circa 2018 - Pkg.add is a Crap shoot Spin of the wheel that often randomly breaks the build across random packages – something that is a huge NO-NO for anyone using Julia in the real world with real commitments.

Ergo here’s a good start at the REQUIRED FUNCTIONALITY if Julia wants to come play with the Big Boys ! … like ANY Production database build in DevOps functionality that is BOTH ATOMIC and allows us to ROLLBACK to SAVEPOINTS easily and flawlessly.

But I like, yes maybe even love, Julia so I won’t leave us hung up at “Bug Descriptions” …
so Here is A Start at the Design Requirements for a Proposed Solution:
I particularly like that DeclarativePackages.jl or jdp is heavily inspired by the nix package manager with the functional requirements design described here >> [Nix - Explore 1](http://GREAT Devops Design Ideas for Julia Package Managers from Nix) "Multiple versions , AND Atomic upgrades , and ROLLBACKS

You can have multiple versions or variants of a package installed at the same time. This is especially important when different applications have dependencies on different versions of the same package — it prevents the “DLL hell”. Because of the hashing scheme, different versions of a package end up in different paths in the Nix store, so they do NOT interfere with each other."

Need MORE design requirements ? – take a look At Synaptic package manager here -
Synaptic software package manager
Features:

  • Install, remove, upgrade and downgrade single and multiple packages
  • System-wide upgrade
  • Package search utility

or Yes – CONDA or ( https Secured ) PIP is great too !!

AND did I mention we REALLY NEED "Atomic upgrades and ROLLBACKS ? :sunglasses::grin: