Add to .repo/local_manifests/lettuce.xml:
<?xml version="1.0" encoding="UTF-8"?>
<manifest>
<project name="ghostrider-reborn/twrp_device_yu_lettuce" path="device/yu/lettuce" remote="github" revision="android-9.0" />
</manifest>Then run repo sync to check it out.
To build:
. build/envsetup.sh
lunch omni_lettuce-eng
mka recoveryimage
Kernel sources are available at: https://github.com/LineageOS/android_kernel_cyanogen_msm8916