An Operating System

./build.py build kernel This builds the kernel.

./build.py run kernel This first builds the kernel (if needed) then runs QEMU like normal

./build.py run kernel -no-wait This first builds the kernel (if needed) then runs QEMU but includes the no-wait argument for the serial port.

./build.py run kernel -make-shell-script Will output the commands for a shell script, but it does not make use of environment variables and it does not include the ability to abort on errors.