android-prepare-vendor | automate AOSP compatible vendor blobs generation

android-prepare-vendor is a Shell library.,roid-prepare-vendor has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

For the latest Android devices (Nexus and Pixel), Google is no longer providing vendor binary archives to be included into AOSP build tree. Officially it is claimed that all vendor proprietary blobs have been moved to /vendor partition, which allegedly doesn't need building from users. Unfortunately, that is not the case since quite a few proprietary executables, DSOs and APKs/JARs located under /system are required in order to have a fully functional set of images, although are missing from AOSP public tree. Additionally, if vendor.img is not generated when system.img is prepared for build, a few bits are broken that also require manual fixing (various symbolic links between two partitions, bytecode product packages, vendor shared library dependencies, etc.). Everyone's hope is that Google will revise this policy for its devices. However until then, missing blobs need to be manually extracted from factory images, processed and included into AOSP tree. These processing steps are evolving into a total nightmare considering that all recent factory images have their bytecode (APKs, JARs) pre-optimized to reduce boot time and their original classes.dex stripped to reduce disk size. As such, these missing prebuilt components need to be repaired/de-optimized prior to be included, since AOSP build is not capable to import pre-optimized bytecode modules as part of the makefile tree. Scripts & tools included in this repository aim to automate the extraction, processing and generation of vendor specific data using factory images as input. Data from vendor partition is mirrored to blob includes via a compatible makefile structure, so that vendor.img can be generated from AOSP builds while specially annotating the vendor APKs to maintain pre-signed certificates and not pre-optimize. If you have modified the build process (such as CyanogenMod) you might need to apply additional changes in device configurations / makefiles. The main concept of this tool-set is to apply all required changes in vendor makefiles leaving the AOSP source code tree & build chain untouched. Hacks in AOSP tree, such as those applied by CyanogenMod, are painful to maintain and very fragile. Repository data is LICENSE free, use it as you want at your own risk. Feedback & patches are more than welcome though.