AospExtended is just an extension to AOSP, through which we are trying to provide a stock AOSP experience along with some important customization features. We have cherry-picked the features from many other projects and hence we are very thankful to them.
To initialize your local repository using the AospExtended trees, use a command like this:
repo init -u https://github.com/AospExtended/manifest.git -b 12.1.x
To initialize a shallow clone, which will save even more space & time, use a command like this:
repo init --depth=1 -u https://github.com/AospExtended/manifest.git -b 12.1.x
repo sync -c -j$(nproc --all) --force-sync --no-clone-bundle --no-tags
source build/envsetup.sh
lunch aosp_device_codename-userdebug
m aex -j$(nproc --all) | tee log.txt