#!/usr/bin/env bash
set -e
pushd ~/.nix
# nvim flake.nix
# alejandra . &>/dev/null
git diff -U0 *.nix

# add generation comment to flake.nix
gen=$(nixos-rebuild list-generations | grep current | awk '{print $1}')
if sed -n '3p' flake.nix | grep -q '^# generation:'; then
    # replace the comment on line 3
    sed -i "3s/^# generation:.*/# generation: $gen/" flake.nix
else
    # insert comment on line 3
    sed -i "3i# generation: $gen" flake.nix
fi

echo "nixos rebuilding..."
sudo nixos-rebuild switch --flake ~/.nix#snowbelle &>.nixos-switch-log || (
 cat .nixos-switch-log | grep --color error && false)
gen=$(nixos-rebuild list-generations | grep current)
git commit -am "$gen"
popd