script for updating all the nixos stuffs

update-all-the-nix

#!/usr/bin/env bash

set -e

function ver2rev {
    echo $1 |  perl -pe 's/.+\.(.+?)"?$/$1/g'
}

nixver=$(nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version')

echo -e "\n\e[32m[*] Updating channels ($USER)\e[39m"
nix-channel --update

echo -e "\n\e[32m[*] Updating channels (sudo)\e[39m"
sudo nix-channel --update

nixver_new=$(nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version')
#nixver_new=master

cd ~/nixos/ && nix flake update

if [ "$nixver" = "$nixver_new" ]; then
    echo -e "\n\e[32m[*] nixpkgs version: $nixver\e[39m"
    echo -e "\e[32m    commit: https://github.com/NixOS/nixpkgs/commits/"$(ver2rev $nixver)"\e[39m"
else
    echo -e "\n\e[96m[!] nixpkgs version: $nixver -> $nixver_new\e[39m"
    echo -e "\e[96m    compare changes: https://github.com/NixOS/nixpkgs/compare/"$(ver2rev $nixver)...$(ver2rev $nixver_new)"\e[39m"

fi

echo -e "\n\e[32m[*] Updating nix-env ($USER)\e[39m"
nix-env -u

echo -e "\n\e[32m[*] Updating NixOS (sudo)\e[39m"
sudo nixos-rebuild switch -j auto

echo -e "\n\e[32m[*] Running nix-collect-garbage --delete-older-than 7d\e[39m"
sudo nix-collect-garbage --delete-older-than 7d

echo -e "\n\e[32m[*] Running nix store optimize\e[39m"
sudo nix store optimise