uninstall

#!/usr/bin/env bash
set -euo pipefail

# More details available here:
# https://nix.dev/manual/nix/2.24/installation/uninstall

main() {
  # Restore global rc files.
  sudo mv /etc/zshrc.backup-before-nix /etc/zshrc
  sudo mv /etc/bashrc.backup-before-nix /etc/bashrc
  sudo mv /etc/bash.bashrc.backup-before-nix /etc/bash.bashrc

  # Stop and remove Nix daemons and services.
  sudo launchctl unload /Library/LaunchDaemons/org.nixos.nix-daemon.plist
  sudo rm /Library/LaunchDaemons/org.nixos.nix-daemon.plist
  sudo launchctl unload /Library/LaunchDaemons/org.nixos.darwin-store.plist
  sudo rm /Library/LaunchDaemons/org.nixos.darwin-store.plist

  # Remove nixbld group and users.
  sudo dscl . -delete /Groups/nixbld
  for u in $(sudo dscl . -list /Users | grep _nixbld); do sudo dscl . -delete /Users/$u; done

  # Requires interaction (remove the nix volume)
  sudo vifs

  # Remove nix from synthetic.conf
  if [ -f /etc/synthetic.conf ]; then
    if [ "$(cat /etc/synthetic.conf)" = "nix" ]; then
      sudo rm /etc/synthetic.conf
    else
      # Manual removal
      sudo vi /etc/synthetic.conf
    fi
  fi

  # Remove nix files (except for the store).
  sudo rm -rf \
    /etc/nix \
    /var/root/.nix-profile \
    /var/root/.nix-defexpr \
    /var/root/.nix-channels \
    ~/.nix-profile \
    ~/.nix-defexpr \
    ~/.nix-channels

  sudo diskutil apfs deleteVolume /nix
  diskutil list

  echo "If the list still contains the nix volume, run the following:"
  echo "  sudo diskutil apfs deleteVolume disk<X>s<Y>"
}

main "$@"