[0001] Provide to-dev-shell utility for mkDerivation

[jonringer]

Make development shells easier to create with all derivations by having mkDerivation provide a toDevShell function, which can be used to convert a derivation into a similar derivation with additional dependencies.

[jonringer]

To disable hardening flags, which cause issues with debug traces

Suggested change

	inherit hardeningDisable;

and add a

, hardeningDisable ? [ "all" ]

as a default

[blaggacao]

I believe, that this is a relevant "entry breadcrumb" into the nixpkgs' state of discussion: NixOS/nix#7501

This EEP seems to be more narrowly scoped for pragamtic reasons, but reference of the broader context may be of interest for a deep dive into the topic.

[jonringer]

If we had stdenv retain a reference to callPackage at the current package scope, then we could feasibly do something like:

devShells.default = myPackage.toDevShell ({ linter, test-runner} : {
  nativeBuildInputs = [ linter test-runner ];
})

[jonringer]

we could also support targeting debug builds for things like cargo, cmake, meson, etc.

[jonringer]

env should also be supported, to reflect upstream preferences