#!/bin/sh

# this file should be run after cloning this git repository
# to set up nixos and versioning.

BACKUP_SUFFIX=.bak-$(date +%Y%m%d-%H%M%S)

# check if /etc/nixos exists or is a symlink
if [ -L /etc/nixos ]; then
  TARGET=$(readlink /etc/nixos)
  sudo cp -r ${TARGET} /etc/nixos${BACKUP_SUFFIX}
  sudo rm -rf /etc/nixos
  echo "/etc/nixos has been backed up to /etc/nixos${BACKUP_SUFFIX}."
elif [ -d /etc/nixos ]; then
  sudo mv -v /etc/nixos /etc/nixos${BACKUP_SUFFIX} # back up the original config
  echo "/etc/nixos has been backed up to /etc/nixos${BACKUP_SUFFIX}."
else
  echo "/etc/nixos does not exist. Backup not performed."
fi

SCRIPT_PATH=$(realpath "$0")
DOTFILES_PATH=$(dirname ${SCRIPT_PATH})
sudo ln -s ${DOTFILES_PATH} /etc/nixos
echo "${DOTFILES_PATH} has been symlinked to /etc/nixos."