I’m developing this ‘*2nix’ tool for the language purescript: GitHub - thought2/spago2nix-ree: Generates a lock file for spago projects that can be built with nix
My main motivation was that dependency resolution is done by nix - so that only actual project sources have to be rebuilt if something changes in your project sources. In the already existing
spago2nix this is not the case, everything has to be recompiled on any change.
spago2nix-ree dependencies that are built once are stored in the nix store so you never have to build them again.
I’m glad that this feature actually already works! But there’s one huge problem: The evaluation phase is very long. For a project with about 10 dependencies one rebuild (without any code change) already takes one minute. No good It’s really just evaluation, the dependencies don’t get rebuilt or so. Tbh, I thought that this would not happen because of the lazy evaluation and caching of derivations which inputs did not change.
Is there anything that I can do to that? The recursive build function can be found here: spago2nix-ree/build-package.nix at d9a6c9d767082a9a4b6134fc65989d7c911c0bef · thought2/spago2nix-ree · GitHub