[anotherelise]

Yes, the swift toolchain includes a full set of command line apps. If you install swift on another platform like Linux for example, you won't have Xcode. You'll have the typical set of command line utilities you'd expect from compilers like gcc and llvm. You don't need Xcode, even for macOS and iOS dev.

Source: I do most of my swift development, including iOS and macOS dev, in a terminal. Editing with vim and using the swift command for the rest. You can even launch your iOS emulators and such from your command line while you're developing.