nix-super/tests/lang/eval-okay-parse-flake-ref.nix at 7ad16c9d1283c14df410a933eff560da258c11bf - max/nix-super - The Forge

max/nix-super

mirror of https://github.com/privatevoid-net/nix-super.git synced 2024-11-24 23:06:16 +02:00

Alex Ameen 2d1d81114d

Add parseFlakeRef and flakeRefToString builtins (#8670 )

Over the last year or so I've run into several use cases where I need to
parse and/or serialize URLs for use by `builtins.fetchTree` or
`builtins.getFlake`, largely in order to produce _lockfile-like_ files
for lang2nix frameworks or tools which use `nix` internally to drive
builds.

I've gone through the painstaking process of emulating
`nix::FlakeRef::fromAttrs` and `nix::parseFlakeRef` several times with
mixed success; but these are difficult to create and even harder to
maintain if I hope to stay aligned with changes to the real
parser/serializer.

I understand why adding new `builtins` isn't something we want to do
flagrantly. I'm recommending this addition simply because I keep
encountering use cases where I need to parse/serialize these URIs in
`nix` expressions, and I want a reliable solution.

Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
Co-authored-by: John Ericson <git@JohnEricson.me>

2023-07-25 17:43:33 +00:00

1 line

62 B

Nix

Raw Blame History

builtins.parseFlakeRef "github:NixOS/nixpkgs/23.05?dir=lib"