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https://github.com/noib3/dotfiles

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https://github.com/noib3/dotfiles

dotfiles home-manager neovim-dotfiles neovim-setup nix-dotfiles nixos ricing unixporn

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README 

        
# `/machines/blade`



Configuration deployed on a 15" 2021 Razer Blade running NixOS.



## Bootstrapping process



### Preliminaries



Every command that follows has to be run either as the root user or with

`sudo`.



### Partitioning



Find the name of the disk you want to install NixOS on with `fdisk -l`.

Assuming that disk is `/dev/sda`, create a GPT partition table (you can ignore

`parted`'s message about needing to update /etc/fstab)

```

parted /dev/sda -- mklabel gpt

```

Create the root partition

```

parted /dev/sda -- mkpart primary 512MiB -8GiB

```

next, create a swap partition (8GB should be plenty enough for a machine with

16GB of RAM. Also, ignore warnings about partitions not being properly aligned

for best performance):

```

parted /dev/sda -- mkpart primary linux-swap -8GiB 100%

```

finally, the boot partition. NixOS uses the ESP (EFI partition table) by

default as its /boot partition

```

parted /dev/sda -- mkpart ESP fat32 1MiB 512MiB

parted /dev/sda -- set 3 esp on

```



### Formatting



```

mkfs.ext4 -L nixos /dev/sda1

mkswap -L swap /dev/sda2

mkfs.fat -F 32 -n boot /dev/sda3

```



### Mounting



(this needs to be modified: `configuration.nix` should be cloned from this

repo, not edited manually)

```

mount /dev/disk/by-label/nixos /mnt

mkdir -p /mnt/boot

mount /dev/disk/by-label/boot /mnt/boot

nixos-generate-config --root /mnt

vim /mnt/etc/nixos/configuration.nix

nixos-install

```

set a password for the root user, then `reboot`.



### Adding channels



```

nix-channel --add https://nixos.org/channels/nixos-20.09 nixos

nix-channel --add https://nixos.org/channels/nixos-unstable nixos-unstable

nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz home-manager

nix-channel --update

sudo nix-channel --add https://nixos.org/channels/nixos-unstable nixos-unstable

sudo nix-channel --update

```

`exit` and log back in to install home-manager:

```

nix-shell '' -A install

```



### `home-manager switch`ing to this config



```

nix-env -iA nixos.git

cd ~

git clone https://github.com/noib3/dotfiles.git

nix-env -e git-minimal

mkdir -p ~/.config/nixpkgs

ln -sf ~/dotfiles/* ~/.config/nixpkgs/

ln -sf ~/.config/nixpkgs/machines/blade/home.nix ~/.config/nixpkgs/home.nix

home-manager switch

rm ~/.bash-history

```



### Remapping keys at the hardware level



The following information is largely taken from

[this](https://wiki.archlinux.org/index.php/Map_scancodes_to_keycodes) ArchWiki

post and [this](https://unix.stackexchange.com/a/170357/368116) stackexchange

answer.



First, find the scancode of the keys that need to be remapped. This can be done

with `sudo evtest` in a linux console (it won't work in a terminal emulator

inside an X session. Use `ctrl-alt-1` to switch to tty1). Once you start typing

you will see something like:

```

Event: time 



To swap the keycodes of the two keys we first need to find the device ID of the

keyboard. This can be done with `sudo evemu-describe`, selecting the device

number from the list and looking for a line starting with `# Input device ID`.

In my case I had

```

# Input device ID: bus 0x03 vendor 0x1532 product 0x26f version 0x111

```

Once we have the scancodes, the keycodes and the keyboard's device ID we can

edit our `/etc/nixos/configuration.nix` by adding

```

services.udev = {

  extraHwdb = ''

    evdev:input:b0003v1532p026F*

     KEYBOARD_KEY_700e2=leftmeta

     KEYBOARD_KEY_700e3=leftalt

  '';

};

```

it should be fairly obvious how to map the info we have into the expected

format:

```

evdev:input:bvp*

 KEYBOARD_KEY_=

```

in particular ``, `` and `` are all 4 digits uppercase

hex values (adding some leading zeros if necessary), and `` is the

lowercase version of the one returned by `evtest`, stripped of the initial

`KEY_` part (i.e. `| sed 's/KEY_\(.*\)/\L\1/'`).



After a `nixos-rebuild switch` (and maybe a reboot) the two keys should have

swapped.