Development of Aosp-Caf-Ex a Custom Android ROM for Android Smartph...

**I would like to share with you my contribution to the development of Aosp-caf Rom, Custom ROM for YU devices {especially YU YUPHORIA (codename: lettuce) and YU YUREKA (codename: TOMATO)}. And later on also developed for Xiaomi devices like Redmi Note 3 (KENZO) & Redmi 4 (santoni). **

I am the Lead Developer of the Aosp-caf-ex. I tried to incorporate all the basic essential features in the ROM. The ROM was originally developed with Android 7.1 nougat as base. However, it was later on updated to be developed with Oreo (Android 8.0) as base(wip).
What's AOSP?
-AOSP is Android as Google publish without other modifications. More or less AOSP is the Nexus devices stock rom without gapps.
What's CAF (CodeAurora Forums)?
-Code Aurora Forum (CAF) is a consortium of companies with projects serving the mobile wireless industry. Software projects it concerns itself with are e.g. Android for MSM, Femto Linux Project, LLVM, MSM WLAN and Linux-MSM. Code Aurora is basically AOSP plus all Qualcomm specific enhancements and optimization.

What is Android ROM ?
The Android ROM is the Android operating system. This is the User interface (Sense UI in HTC phones) and the file system for maintaining contacts etc. It is composed of a Linux kernel and various add-ons to achieve specific functionality.

How does it work? (How to make it for our devices?)
Github: https://github.com/Aosp-Caf-Ex/platform_manifest
first of all u need to familiar with the building Aosp Rom(read this- https://source.android.com/setup/building )
now

Required Packages
Simply copy and paste this in a terminal window It will install required packages :

sudo apt-get update && sudo apt-get install openjdk-8-jdk
Now some other required packages
sudo apt-get install git-core gnupg ccache lzop flex bison gperf build-essential zip curl zlib1g-dev zlib1g-dev:i386 libc6-dev lib32ncurses5 lib32z1 lib32bz2-1.0 lib32ncurses5-dev x11proto-core-dev libx11-dev:i386 libreadline6-dev:i386 lib32z-dev libgl1-mesa-glx:i386 libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc readline-common libreadline6-dev libreadline6 lib32readline-gplv2-dev libncurses5-dev lib32readline5 lib32readline6 libreadline-dev libreadline6-dev:i386 libreadline6:i386 bzip2 libbz2-dev libbz2-1.0 libghc-bzlib-dev lib32bz2-dev libsdl1.2-dev libesd0-dev squashfs-tools pngcrush schedtool libwxgtk2.8-dev python

Getting Ready
-Making required directories
-Obtaining the repo binary
-Adding repo binary to your path
-Giving the repo binary proper permissions
-Initializing an empty repo
-Syncing the repo
So, Simply copy paste the below code
Make directory for the repo binary

mkdir ~/bin

Add directory for the repo binary to its path

PATH=~/bin:$PATH

Downloading repo and placing it in the appropriate directory

curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo

Giving the repo proper permissions

chmod a+x ~/bin/repo

**Creating dir repo (where the repo will be stored and your source would be synced) **

mkdir ~/Aosp && cd ~/Aosp

Initializing and downloading the manifest

repo init -u https://github.com/Aosp-Caf-Ex/platform_manifest.git -b n-7x

Sync the source
This process might take longer because the sources are huge in size more than 25gb

repo sync -f --force-sync --no-clone-bundle

Building the Aosp-caf-ex ROM

Follow the AOSP Porting Instructions to prepare the proprietary files for building for your device: http://xda-university.com/as-a-developer/porting-aosp-roms-using-source-code

To build ROM For your device