Please read the AOSP building instructions before proceeding.

Initiate core trees without any device/kernel/vendor:

$ repo init -u https://github.com/AOKP/platform_manifest.git -b oreo

Sync the repository:

$ repo sync --force-sync

After the sync is finished, please read the instructions from the Android site on how to build.

. build/envsetup.sh
lunch

You can also build for specific devices (eg. hammerhead) like this:

. build/envsetup.sh
lunch aokp_cheeseburger-userdebug
mka rainbowfarts

Remember to make clobber && make clean every now and then!