Useful in tooling, releases, etc - where Dart is available Example usages: ```bash # Monorepo world ❯ dart ./dev/tools/bin/engine_hash.dart -s head 226e13826c7253c968d798666f323b1f207979f8 # Non-monorepo world ❯ dart ./dev/tools/bin/engine_hash.dart -s head Error calculating engine hash: Not in a monorepo ```