Finds package imports referenced by the generated Dart source.

Returns the cached Dart package root used for twostep scripts.

Creates a minimal pubspec for generated twostep scripts.

Hoists required imports to the top of the standalone Dart file.

Creates a cached package root and resolves dependencies for package imports.

Adds statement terminators so emitted Dart source can compile as a standalone file. Tracks both paren/bracket depth (for multi-line expressions) and brace depth (for block vs. assignment contexts) to correctly place semicolons.

Executes the dart compile and run process.

Transforms forms into a standalone Dart main function.