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# nix-exprs
[](https://garnix.io)
[](https://hercules-ci.com/)
## how to use
### enable binary cache
linux packages are built with [hercules-ci](https://hercules-ci.com/), while packages for apple silicon
are built with [garnix](https://garnix.io/). both have binary caches, however different ones; you can use
garnix's by following the instructions [here](https://garnix.io/docs/caching), and the cachix cache for
hercules-ci by following the instructions [here](https://app.cachix.org/cache/getchoo#pull). i would also recommend
[donating](https://opencollective.com/garnix_io) to garnix if you can!
example:
<details>
<summary>nixos configuration</summary>
```nix
{
nix.settings = {
trusted-substituters = [
"https://cache.garnix.io"
"https://getchoo.cachix.org"
];
trusted-public-keys = [
"cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
"getchoo.cachix.org-1:ftdbAUJVNaFonM0obRGgR5+nUmdLMM+AOvDOSx0z5tE="
];
}
}
```
</details>
<details>
<summary>using `cachix` on linux</summary>
```bash
nix run nixpkgs#cachix -- use getchoo
```
</details>
### flake configuration
```nix
{
inputs = {
getchoo = {
url = "github:getchoo/nix-exprs";
};
};
outputs = {
nixpkgs,
getchoo,
...
}: {
nixosConfigurations.hostname = nixpkgs.lib.nixosSystem {
modules = [
{
nixpkgs.overlays = [getchoo.overlays.default];
environment.systemPackages = with pkgs; [
treefetch
];
}
];
};
};
}
```
### nix channels
#### adding the channel
```bash
nix-channel --add https://github.com/getchoo/nix-exprs/archive/main.tar.gz getchoo
nix-channel --update
```
#### usage
```nix
{pkgs, ...}: let
getchoo = import <getchoo>;
in {
nixpkgs.overlays = [getchoo.overlays.default];
environment.systemPackages = with pkgs; [
treefetch
];
}
```
### cli support
this overlay can also be used in the base nix package manager :)
> **Note**
> for nixos/nix-darwin users, `nixpkgs.overlays` does not configure
> overlays for tools such as `nix(-)run`, `nix(-)shell`, etc. so this
> will also be required for you
the best way to make this overlay available for you is to
add it to your flake registry or `~/.config/nixpkgs/overlays.nix`.
#### flake registry
this is the preferred way to use this overlay in the cli, as it allows
for full reproducibility with the flake.
to use this overlay with commands like `nix build/run/shell`, you can
add it to your flake registry:
```shell
nix registry add getchoo github:getchoo/nix-exprs
nix run getchoo#treefetch
```
#### overlays.nix
for those who don't want to use this flake's revision of nixpkgs,
or do not use flakes, you can also add it as an overlay.
[add the channel](#adding-the-channel) to your nix profile, then place
this in `~/.config/nixpkgs/overlays.nix` (or a nix file in `~/.config/nixpkgs/overlays/`):
```nix
let
getchoo = import <getchoo>;
in [getchoo.overlays.default]
```
|
