Generate SSH keys on new system to clone files from github.

ssh-keygen -t ed25519 -C "[email protected]"
cat ~/.ssh/id_ed25519.pub

Add the key to git repo.

Clone the git repository

nix shell --extra-experimental-features nix-command --extra-experimental-features flakes nixpkgs#git
git clone [email protected]:nazmir/nix-config.git

Create Machine specific and architecture-specific configuration files if needed.

Use the existing confifuration files or create new ones as needed.

Link the newly renamed configuration files to the nix-config directory

The script will backup the files in source directory (arg1) and link to target directory.
Don't rename hardware config to specific machine as configuration.nix

sudo ~/nix-config/bin/rename-and-link.sh /etc/nixos/configuration.nix ~/nix-config/nixos/hosts/pc/configuration-pc.nix
sudo ~/nix-config/bin/rename-and-link.sh /etc/nixos/hardware-configuration.nix ~/nix-config/nixos/hosts/pc/hardware-configuration.nix
sudo nixos-rebuild switch --flake /home/mir/nix-config/.#mir-nixos-pc

Install Home manager as a standalone using flakes

Before installing home manager run nix flake update and then link the config file to git repo

cd ~/nix-config
nix flake update

#this will initialize home manager and place config file in ~/.config/home-manager/home.nix 
nix run home-manager/master -- init
  
~/nix-config/bin/rename-and-link.sh ~/.config/home-manager/home.nix ~/nix-config/home-manager/hosts/home-nixos.nix  
  
#initial evaluation with flakes  
home-manager switch --flake /home/mir/nix-config/.#mir@mir-nixos-pc 

To update the system

nix flake update

Using nh helper to rebuild system or home manager

nh os switch --ask #Ask for confirmation before applying configuration
nh home switch --ask
#home-manager switch --flake '.#mir@mir-nixos-pc'
nh home switch -c mir@mir-nixos-pc ./

#To specify flakes explicitly use:
nh os switch --ask ~/nix-config/.#mir-nixos-thinkpad

#To use the current hostname and specify flake path reference use:
nh os switch --ask ~/nix-config/ 

Garbage collection using nh helper

nh clean all #Clean OS and Home profiles
nh clean user #clean user profiles

Cleaning specific profiles

nix profile list
nh clean profile -a nixGL #nixGL is profile name and -a asks for confirmation

Apply config via flakes in case nh helper is not installed

sudo nixos-rebuild switch --flake /home/mir/nix-config/.#mir-nixos-thinkpad
home-manager switch --flake /home/mir/nix-config/.#mir@mir-nixos-thinkpad

Activating tailscale

 sudo tailscale up -authkey tskey-auth-KEY #Get key from tailscale console

Nixos check build difference if nh helper is not installed

Build the result before switching

sudo nixos-rebuild build --flake /home/mir/nix-config/.#mir-nixos-thinkpad 

To compare current system with build result run

nvd diff /run/current-system/ ./result/ 
nvd diff $(ls -d1v /nix/var/nix/profiles/system-*-link|tail -n 2) #To compare result after switch

nvd uses nix store diff-closure, but with improved reporting. Syntax for nix store diff-closure is:

nix store diff-closures $(ls -d1v /nix/var/nix/profiles/system-*-link|tail -n 2)

Other Package configuration

Doom Emacs configuration

Install Doom Emacs and make sure to run
doom doctor #To check for any issues

Backup ~/.emacs.d if it exists

mv ~/.emacs.d ~/.emacs.d.orig

Copy doom configuration files to ~/.nix-config/.config/doom

~/nix-config/bin/rename-and-link.sh ~/.config/doom/ ~/nix-config/.config/doom

sway config

~/nix-config/bin/rename-and-link ~/.config/sway/config ~/.config/sway/config

Kitty configuration

~/nix-config/bin/rename-and-link ~/.config/kitty/ ~/nix-config/.config/kitty 
#The result will be in current folder