nix-your-shell

A nix and nix-shell wrapper for shells other than bash.

nix develop and nix-shell use bash as the default shell, so nix-your-shell prints shell snippets you can source to use the shell you prefer inside of Nix shells.

Usage

nix-your-shell will print out shell environment code you can source to activate nix-your-shell.

The shell code will transform nix and nix-shell invocations that call nix-your-shell YOUR_SHELL nix ... and nix-your-shell YOUR_SHELL nix-shell ... instead. nix-your-shell will add a --command YOUR_SHELL argument to these commands (unless you've already added one) so that it drops you into your shell, rather than bash.

Fish

Add to your ~/.config/fish/config.fish:

fish if command -q nix-your-shell nix-your-shell fish | source end

Zsh

Add to your ~/.zshrc:

if command -v nix-your-shell > /dev/null; then nix-your-shell zsh | source /dev/stdin fi

Installation

nix-env

To install the latest version with nix-env, use:

sh nix-env --install --file https://github.com/MercuryTechnologies/nix-your-shell/archive/refs/heads/main.tar.gz

You can later remove the installed program with nix-env --uninstall nix-your-shell.

nix run

Run dynamically with nix run:

sh nix run github:MercuryTechnologies/nix-your-shell

Flakes

Add to a NixOS flake configuration:

flake.nix:

```nix { inputs = { nixpkgs.url = "github:NixOS/nixpkgs"; nix-your-shell = { url = "github:MercuryTechnologies/nix-your-shell"; inputs.nixpkgs.follows = "nixpkgs"; }; };

outputs = { self, nixpkgs, ... } @ attrs: { nixosConfigurations = { YOURHOSTNAME = nixpkgs.lib.nixosSystem { system = "x8664-linux"; specialArgs = attrs; modules = [./YOUR_HOSTNAME.nix]; }; }; }; } ```

./YOUR_HOSTNAME.nix:

```nix { config, pkgs, nix-your-shell, ... }: { nixpkgs.overlays = [ nix-your-shell.overlay ];

environment.systemPackages = [ pkgs.nix-your-shell ];

# Example configuration for fish: programs.fish = { enable = true; promptInit = '' nix-your-shell fish | source ''; };

# ... extra configuration } ```

Comparison with any-nix-shell

any-nix-shell does roughly the same thing, and serves as the inspiration for nix-your-shell.

There are a few reasons I wrote nix-your-shell as a competitor:

• any-nix-shell doesn't support Nix flakes through nix develop. nix-your-shell does.
• any-nix-shell is a hodgepodge of shell scripts with multiple layers of eval and templating, making hacking or modifying it challenging. In contrast, nix-your-shell is written in Rust with a relatively straightforward structure (the shell environment code generation command and the nix wrappers are the same, so there's no need for dotfile executables on your $PATH).

However, any-nix-shell can optionally display the packages in the current shell on a righthand prompt. nix-your-shell does not support this.