bisect.sh

#!/usr/bin/env bash
nixBuild() {
  DRV=$(nix-instantiate "$@");
  nix-build $DRV --builders "" --no-out-link;
  S=$?;
  if [ $S -ne 0 ]; then
    # trigger a git bisect bad if the bad line was found
    nix log $DRV | grep -i "has terminated unexpectedly during startup" && exit 42;
    # else trigger a skip (some other random build failure)
    exit 125;
  fi;
  # build was successful
  exit 0
}
nixBuild nixos/tests/virtualbox.nix -A simple-cli