Downloading the Source

1. Repo sync all code with default.xml
   repo init -u git://github.com/OnePlusOSS/android.git -b oneplus3/6.0.1
repo sync
2. Root your device
3. Pull the necessary libraries from your device by executing the script pull_library.sh
4. After pull_library.sh be executed, a directory named "vendor" should be generated. Copy this directory to root of project.

Building the System

[Set up environment]
Initialize the environment with the envsetup.sh script. git a $ . build/envsetup.sh
[Choose a Target]
Choose which target to build with lunch.
$ lunch
enter 25 for msm8996-userdebug
enter 26 for msm8996-user
[Build the code]
Build everything with make. GNU make can handle parallel tasks with a -jN argument.
$ make -j4
[Flash a Device]
Let device enter fastboot mode, run
$ adb reboot bootloader
Once the device is in fastboot mode, run
$ fastboot flash boot boot.img
$ fastboot flash system system.img
If you want flash new /data partition, run
$ fastboot flash userdata userdata.img