On Wednesday, March 21, 2018 at 7:05:14 AM UTC-7, David Wu wrote:
>
> Dear Xin,
>
> I have confused by branch naming in https://android.googlesource.com, 
> 1. Could you please help to explain purpose of different branchs, such as:
>
You can find the source code tags and builds info here:
https://source.android.com/setup/build-numbers

oreo-drx-release //x is 1,2,3...
>
The oreo-drx-release (8.0.0) was for the 2017 Pixel 2 devices after the 
oreo-release. For example:
OPD1.170816.010 android-8.0.0_r21 Oreo Pixel 2 XL, Pixel 2

oreo-mx-release //x is 1,2,3...
>
The oreo maintenance release (8.1.0) for certain carriers. For example:
OPM5.171019.017 android-8.1.0_r18 Oreo Nexus 5X, Nexus 6P

oreo-mrx-release //x is 1,2,3...
>
The oreo maintenance release (8.1.0). For example:
OPM1.171019.021 android-8.1.0_r15 Oreo Pixel 2 XL, Pixel 2, Pixel XL, Pixel

oreo-release
>
 The oreo release (8.0.0). For example:
OPR1.170623.026 android-8.0.0_r7 Oreo Pixel XL, Pixel, Pixel C
 

>
> 2. Which branch was the tag android-8.1.0_r18 created from?
>
The branch is oreo-m5-release. You may find the branch info from the tag on 
the platform/build project. For example:
https://android.googlesource.com/platform/build/+log/01e2e4beeb304532351212470d75d1ce30c02a13
01e2e4b Version bump to OPM5.171019.017 by android-build-team Robot · 8 
weeks ago oreo-m5-release android-8.1.0_r18


> 3. Our company is ready to develop android O Car Project, and we want to 
> update AOSP source code regularly. Which branch is the best choice act as 
> our baseline, oreo-mr1-release or android-8.1.0_r18?
>
I suggest "oreo-mr1-release". The latest build for this branch is:
 OPM1.171019.021 android-8.1.0_r15 Oreo Pixel 2 XL, Pixel 2, Pixel XL, Pixel

Hope it helps.

bill

>
> Thanks very much!
>
> On Wednesday, December 6, 2017 at 1:28:30 PM UTC+8, Xin Li wrote:
>>
>> Hi all,
>>
>> Android 8.1.0 Oreo MR1 source code is now available.  The following 
>> builds, tags, and devices are supported:
>>
>>  - OPM1.171019.011, android-8.1.0_r1, Pixel 2 XL (taimen), Pixel 2 
>> (walleye), Pixel XL (marlin), Pixel (sailfish), Nexus 5X (bullhead), Nexus 
>> 6P (angler), Pixel C (dragon)
>>
>> The corresponding factory images, ota images, and proprietary binaries 
>> are available at
>>    https://developers.google.com/android/images
>>    https://developers.google.com/android/ota
>>    https://developers.google.com/android/drivers
>>
>> We pushed a reference oreo-mr1-dev branch as well as oreo-mr1-release 
>> branch.
>>
>> We have also pushed the corresponding kernel projects for the following 
>> devices:
>>
>> Tag                | Project      | Branch                                
>>  | Device
>> android-8.1.0_r0.1 | kernel/msm   | android-msm-angler-3.10-oreo-mr1      
>>  | Nexus 6P
>> android-8.1.0_r0.2 | kernel/msm   | android-msm-bullhead-3.10-oreo-mr1    
>>  | Nexus 5X
>> android-8.1.0_r0.3 | kernel/tegra | android-tegra-dragon-3.18-oreo-mr1    
>>  | Pixel C
>> android-8.1.0_r0.4 | kernel/msm   | android-msm-marlin-3.18-oreo-mr1      
>>  | Pixel and Pixel XL
>> android-8.1.0_r0.5 | kernel/msm   | android-msm-wahoo-4.4-oreo-mr1        
>>  | Pixel 2 and Pixel 2 XL
>> android-8.1.0_r0.6 | kernel/msm   | 
>> android-easel-intel-linux-4.7-oreo-mr1 | Pixel 2 and Pixel 2 XL
>>
>> We'll also merge Oreo MR1 into AOSP master.  I'll update this post when 
>> each of these become available.
>>
>>

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