git bisect with script

check.sh

#!/bin/zsh --login

cd ~/path/to/project_dir/
bundle install
bundle exec rake db:test:prepare
line=$(bundle exec rspec path/to/spec/feature_name_spec.rb | grep 1\ failure)
if [ ${line:-null} = null ]; then
  exit 0
else
  exit 1
fi

terminal commands

# into your shell:
cd ~/path/to/project_dir/
nano check.sh
chmod +x check.sh
git bisect start HEAD good_commit_hash
git bisect run ./check.sh