Tree for building Unofficial TWRP for OnePlus 5. (Decryption works on Android 12.x ROMs)

Kernel source: https://github.com/faoliveira78/android_kernel_oneplus_msm8998

First repo init the TWRP 12.1 tree:

mkdir ~/android/twrp-12.1
cd ~/android/twrp-12.1
repo init -u git://github.com/minimal-manifest-twrp/platform_manifest_twrp_aosp.git -b twrp-12.1

Then add to a local manifest (if you don't have .repo/local_manifests then make that directory and make a blank file and name it something like twrp.xml):

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <project name="faoliveira78/android_kernel_oneplus_msm8998" path="kernel/oneplus/msm8998" remote="github" revision="lineage-19.1"/>
  <project name="faoliveira78/android_device_oneplus_cheeseburger" path="device/oneplus/cheeseburger" remote="github" revision="android-12.1"/>
</manifest>

Now you can sync your source:

repo sync

Finally execute these:

. build/envsetup.sh
export LC_ALL=C
lunch twrp_cheeseburger-eng
mka recoveryimage