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# Sway on non-NixOS Distributions
## Walkthrough - NixGL + Sway on Ubuntu
This guide will walk you through running `sway` on Ubuntu 18.10 via `nix` and `nixpkgs`.
At a high-level:
1. Install `nix`
2. Configure `nix` to use our binary cache where these packages are built against various versions of `nixpkgs`
3. Install `NixGL` allowing us to use OpenGL nix packages on non-NixOS distros
4. Install `sway-beta` from `nixpkgs` and this overlay
5. Configure `sway-beta` with some settings for this demo
5. Drop to a TTY and run it!
### Quick Version
If you'd like the quick version, you can use the quickshot `execute.sh` script in this directory:
```
cd /tmp
wget https://raw.githubusercontent.com/colemickens/nixpkgs-wayland/master/docs/sway-on-ubuntu/execute.sh
chmod +x execute.sh
./execute.sh
```
[](https://www.youtube.com/watch?v=Sri_24TJtFI)
You can then skip to the end.
### Detailed Version
#### Install Nix
Per the instructions on the NixOS Wiki: [Nix Installation Guide - Single User Install](https://nixos.wiki/wiki/Nix_Installation_Guide):
```bash
sudo apt update; sudo apt install curl git
sudo install -d -m755 -o $(id -u) -g $(id -g) /nix
curl https://nixos.org/nix/install | sh
source .nix-profile/etc/profile.d/nix.sh
```
(I recommend you logout/login here, so you don't need
to continue to source the nix profile in each shell.)
#### Install Cachix
`cachix` is a service that provides binary caching and a CLI
that enables easy uploading to and trusting of binary caches.
This will install `cachix` from a specific snapshot of `nixpkgs`
and make it available in your environment. **It will then trust
the binary cache that contains builds from this overlay.**
```bash
nix-env -iA cachix -f https://github.com/NixOS/nixpkgs/tarball/889c72032f8595fcd7542c6032c208f6b8033db6
# note that only the official NixOS cache is listed (cache.nixos.org)
cat ~/.config/nix
# ignore errors from this command (https://github.com/cachix/cachix/issues/148)
cachix use nixpkgs-wayland
# note that now the nixpkgs-wayland.cachix.org server is trusted
cat ~/.config/nix
```
This will cause future `nix` commands to check with our binary cache
instead of building everything from scratch. This repository is built against
`nixpkgs-unstable` which is what you're now using, so you shouldn't have to
build anything. Even if you did, `nix` effectively guarantees it will "just build"m,
assuming enough RAM, CPU, etc.
#### Enable the `nixpkgs-wayland` overlay
```bash
mkdir -p $HOME/.config/nixpkgs/overlays
git clone https://github.com/colemickens/nixpkgs-wayland.git \
$HOME/.config/nixpkgs/overlays/nixpkgs-wayland
```
#### Install NixGL and Sway
OpenGL enabled Nix applications on non-NixOS operating systems require
the use of a wrapper. I've added some summary details to the NixOS Wiki:
[Nixpkgs with OpenGL on non-NixOS](https://nixos.wiki/wiki/Nixpkgs_with_OpenGL_on_non-NixOS)
**Install NixGL and OpenGL drivers**
(Change the attribute to be installed per your GL vendor.)
```bash
curl -L --fail https://raw.githubusercontent.com/guibou/nixGL/master/default.nix > /tmp/nixgl.nix
```
**Install Sway and related tools**
```bash
nix-env -iA nixGLIntel -f /tmp/nixgl.nix
nix-env -iA nixpkgs.sway-beta nixpkgs.dmenu nixpkgs.mako nixpkgs.slurp nixpkgs.grim
```
This will install `sway-beta` the default configured channel for the Nix install you
performed at the beginning, which is named `nixpkgs`. In our case though, `sway-beta`
is overriden to a newer version by use of this overlay.
**Install a demo Sway config**
Install the default sway config:
```bash
mkdir -p $HOME/.config/sway
wget 'https://raw.githubusercontent.com/swaywm/sway/master/config.in' \
-O $HOME/.config/sway/config
sed -i 's|Mod4|Mod1|g' ~/.config/sway/config
sed -i '/Sway_Wallpaper_Blue_1920x1080.png/d' ~/.config/sway/config
sed -i 's|urxvt|gnome-terminal|g' ~/.config/sway/config
```
##### Run Sway
Let's drop to a TTY and try sway. **Note, this will stop GDM and your current session!**
```bash
# stop the graphical session
sudo systemctl isolate multi-user.target
# switch to another TTY
# ctrl+alt+f3
# on TTY
nixGLIntel sway
```
You can run `sway` under GNOME as well, but there are some oddities about where windows spawn.
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