4 ms·

IMO the absence of a `--pure` flag (the `-i` flag seems not to work in the same way) makes `nix develop` an unsuitable replacement for `nix-shell`. A few SO thr

IMO the absence of a `--pure` flag (the `-i` flag seems not to work in the same way) makes `nix develop` an unsuitable replacement for `nix-shell`. A few SO threads and nixpkgs issues seem to agree, but if I'm misunderstanding I'd love to learn more.

JamesSwift 4y ago
It looks like `--store` might be a way to get this, but I'm not sure if thats cross-platform.
- n8henrie 4y ago
  `nix develop --store`? I'm not seeing anything about it (on mobile at least): - https://nixos.org/manual/nix/unstable/command-ref/new-cli/nix3-develop.html https://nixos.org/manual/nix/unstable/command-ref/new-cli/ni... - https://nixos.wiki/wiki/Nix_command/develop https://nixos.wiki/wiki/Nix_command/develop
  - JamesSwift 4y ago
    Its actually part of the nix config, which is also able to be overridden in the CLI: https://nixos.org/manual/nix/stable/command-ref/conf-file.html#conf-store https://nixos.org/manual/nix/stable/command-ref/conf-file.ht... Note this will bust your local cache as well as the hydra cache since I'm pretty sure they depend on the store prefix.
    - n8henrie 4y ago
      Gotcha, thanks. Not sure how this would help replace `--pure` though.
      - JamesSwift 4y ago
        Yeah now that I think about it youre right :D It would only "purify" your nix dependencies, but wouldnt purify your environmental ones necessarily.
rgoulter 4y ago
> IMO the absence of a `--pure` flag (the `-i` flag seems not to work in the same way) makes `nix develop` an unsuitable replacement for `nix-shell` Ah, right, this is a useful use-case that nix develop doesn't cover.
- tadfisher 4y ago
  To be clear, nix-shell --pure serves this use case by accident; it basically drops you into the shell with generic-builder.sh sourced and the build environment for a Nix derivation. This is useful for debugging Nix derivations, and if you are using mkShell you can minimize the pollution, but it's not exactly a development environment tailored for the typical software-engineering workflow. The tool that (ab)uses nix-shell/nix shell to get this right is devshell [1], which creates an activation script (similar to NixOS itself) that provides a real reproducible development env which works with shells other than bash. [1] https://github.com/numtide/devshell https://github.com/numtide/devshell

JamesSwift 4y ago

It looks like `--store` might be a way to get this, but I'm not sure if thats cross-platform.

n8henrie 4y ago
`nix develop --store`? I'm not seeing anything about it (on mobile at least): - https://nixos.org/manual/nix/unstable/command-ref/new-cli/nix3-develop.html https://nixos.org/manual/nix/unstable/command-ref/new-cli/ni... - https://nixos.wiki/wiki/Nix_command/develop https://nixos.wiki/wiki/Nix_command/develop
- JamesSwift 4y ago
  Its actually part of the nix config, which is also able to be overridden in the CLI: https://nixos.org/manual/nix/stable/command-ref/conf-file.html#conf-store https://nixos.org/manual/nix/stable/command-ref/conf-file.ht... Note this will bust your local cache as well as the hydra cache since I'm pretty sure they depend on the store prefix.
  - n8henrie 4y ago
    Gotcha, thanks. Not sure how this would help replace `--pure` though.
    - JamesSwift 4y ago
      Yeah now that I think about it youre right :D It would only "purify" your nix dependencies, but wouldnt purify your environmental ones necessarily.

rgoulter 4y ago

> IMO the absence of a `--pure` flag (the `-i` flag seems not to work in the same way) makes `nix develop` an unsuitable replacement for `nix-shell` Ah, right, this is a useful use-case that nix develop doesn't cover.

tadfisher 4y ago
To be clear, nix-shell --pure serves this use case by accident; it basically drops you into the shell with generic-builder.sh sourced and the build environment for a Nix derivation. This is useful for debugging Nix derivations, and if you are using mkShell you can minimize the pollution, but it's not exactly a development environment tailored for the typical software-engineering workflow. The tool that (ab)uses nix-shell/nix shell to get this right is devshell [1], which creates an activation script (similar to NixOS itself) that provides a real reproducible development env which works with shells other than bash. [1] https://github.com/numtide/devshell https://github.com/numtide/devshell