def after_apply_all [] {
  if not ('~/.nix-profile/bin/home-manager' | path exists) {
    print $"(ansi red)home-manager is not installed(ansi reset)"
    return
  }
  if (ha-chksum) == $env.SILO_HA_CHKSUM? {
    print $"(ansi green)home-manager configuration unchanged(ansi reset)"
    return;
  }
  print "Updating with home-manager"
  ( home-manager switch )

  print "Expiring old home manager configurations"
  ( home-manager expire-generations -1 days )

  print "Cleaning nix store"
  ( nix-store --gc )

  ignore
}

def --env before_apply_all [] {
  $env.SILO_HA_CHKSUM = (ha-chksum)
}

def ha-chksum [] {
  shasum ~/.config/home-manager/home.nix
}