#!/usr/bin/env sh

set -eu

format() {
  alejandra . &>/dev/null
}

git_stage() {
  git status
  read -p "All files will be added to git. Press Enter to confirm."
  git add -A
}

rebuild() {
  echo "NixOS Rebuilding..."
  sudo nixos-rebuild switch --flake . &>nixos-switch.log || (
      cat nixos-switch.log | grep --color error && false
  )
}

message() {
  local msg
  read -p "Enter commit message: " msg
  nixos-rebuild list-generations | grep True | awk -v msg="$msg" -v machine="$(hostname)" 'BEGIN \
  {if (msg!="") {
  {print msg}
  {print ""}
  }}
  {printf "Generation: "} {print $1}
  {if (msg=="") {
  {print ""}
  }}
  {printf "Built at: "} {printf $3} {printf " on "} {print $2}
  {printf "Build machine: "} {print machine}
  {printf "Kernel: "} {print $5}
  {printf "nixpkgs: "} {print $4}'
}

git_commit() {
  gen=$(message)
  git commit -m "$gen"
}

main() {
    pushd ~/.config/amuro
    # Format Nix code with alejandra
    format
    # Add all files to git
    git_stage
    # nixos-rebuild
    rebuild
    # Commit all files to git
    git_commit
    popd
}

main