nixos-and-flakes-book/docs/best-practices/simplify-nixos-related-commands.md
2024-03-16 18:07:01 +08:00

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# Simplifying NixOS-Related Commands
To simplify NixOS-related commands, I utilize [just](https://github.com/casey/just), which proves to be very convenient.
Alternatively, you can also use similar tools like Makefile or [cargo-make](https://github.com/sagiegurari/cargo-make) for this purpose. Here, I will provide my approach as a reference.
Below is an example of how my Justfile looks:
> The latest Justfile I'm using: [ryan4yin/nix-config/Justfile](https://github.com/ryan4yin/nix-config/blob/main/Justfile)
```Makefile
# just is a command runner, Justfile is very similar to Makefile, but simpler.
############################################################################
#
# Nix commands related to the local machine
#
############################################################################
deploy:
nixos-rebuild switch --flake . --use-remote-sudo
debug:
nixos-rebuild switch --flake . --use-remote-sudo --show-trace --verbose
up:
nix flake update
# Update specific input
# usage: make upp i=home-manager
upp:
nix flake lock --update-input $(i)
history:
nix profile history --profile /nix/var/nix/profiles/system
repl:
nix repl -f flake:nixpkgs
clean:
# remove all generations older than 7 days
sudo nix profile wipe-history --profile /nix/var/nix/profiles/system --older-than 7d
gc:
# garbage collect all unused nix store entries
sudo nix-collect-garbage --delete-old
############################################################################
#
# Idols, Commands related to my remote distributed building cluster
#
############################################################################
add-idols-ssh-key:
ssh-add ~/.ssh/ai-idols
aqua: add-idols-ssh-key
nixos-rebuild --flake .#aquamarine --target-host aquamarine --build-host aquamarine switch --use-remote-sudo
aqua-debug: add-idols-ssh-key
nixos-rebuild --flake .#aquamarine --target-host aquamarine --build-host aquamarine switch --use-remote-sudo --show-trace --verbose
ruby: add-idols-ssh-key
nixos-rebuild --flake .#ruby --target-host ruby --build-host ruby switch --use-remote-sudo
ruby-debug: add-idols-ssh-key
nixos-rebuild --flake .#ruby --target-host ruby --build-host ruby switch --use-remote-sudo --show-trace --verbose
kana: add-idols-ssh-key
nixos-rebuild --flake .#kana --target-host kana --build-host kana switch --use-remote-sudo
kana-debug: add-idols-ssh-key
nixos-rebuild --flake .#kana --target-host kana --build-host kana switch --use-remote-sudo --show-trace --verbose
idols: aqua ruby kana
idols-debug: aqua-debug ruby-debug kana-debug
```
By Save this `Justfile` to the root directory of your Nix flake. Then, I can use `just deploy` to deploy the configuration to my local machine, and `just idols` to deploy the configuration to all my remote servers.
This approach simplifies the execution of NixOS commands by abstracting them behind target names in the Justfile, providing a more user-friendly and convenient experience.