Currently, invoking compile.sh will run its mono task of building all the
components into a final image.
In some situation, especially when developing with Kernel or U-Boot, it is
handy to run a portion of that great task like:
export BOARD=firefly-rk3399
export BRANCH=dev
# more to avoid the popup of dialog
./compile.sh 'fetch_from_repo "$BOOTSOURCE" "$BOOTDIR" "$BOOTBRANCH" "yes"'
./compile.sh 'compile_uboot'
or use a profile to keep things simple:
./compile.sh default BRANCH=dev 'compile_uboot'