Possible Global State Issues

[gordonwatts]

When this runs as a codegen in servicex, the global state is retained between invokations. There is some global state in the code here.

• Make sure that the known global state (see the test config) is cleared as part of the conversion.
• Test for other issues - in particular - the code injection that puts in NOSYS in the calibrations tuff.

[gordonwatts]

The code we use in codegen:

        if len(body) != 1:
            raise GenerateCodeException(
                f'Requested codegen for "{query}" yielded no code statements (or too many).'
            )  # noqa: E501
        a = body[0].value

        self._exe.write_cpp_files(self._exe.apply_ast_transformations(a), path)

Here a is the ast from qastle's translation. So the apply_ast_transformation is the key bit of code that needs to be immune to global state.