name: flakeRefToString implementation: flake::prim_flakeRefToString args: [attrs] experimentalFeature: flakes

Convert a flake reference from attribute set format to URL format.

For example:

builtins.flakeRefToString {
  dir = "lib"; owner = "NixOS"; ref = "23.05"; repo = "nixpkgs"; type = "github";
}

evaluates to

"github:NixOS/nixpkgs/23.05?dir=lib"