TempleOS does just that. What you type at the command line is the TempleOS systems language (Holy-C if I recall), it's compiled and executed. The syntax of Ho

TempleOS does just that. What you type at the command line is the TempleOS systems language (Holy-C if I recall), it's compiled and executed. The syntax of Holy-C is such that it's not too onerous as a shell language.