Repo下载AOSP源码：基于ubuntu22.04 环境配置，android-12.0.0

1. 前言

使用高版本Ubuntu配置了编译环境后，发现repo不可使用，Python出了一堆问题，左右尝试无果，最终通过遍历常用的Python版本，发现3.9可以用。

对 Python 2 的支持已于 2020 年 1 月 1 日停止，Google 强烈建议您将所有脚本改用 Python 3。
目前使用google repo下载AOSP源码，需要使用Python3.9，测试其余版本皆不可用
Ubuntu20.04 默认支持Python3.9，而Ubuntu22.04则默认是Python3.10
本文介绍基于Ubuntu22.04下载安卓源码，方法步骤适用于其余Ubuntu版本。

系列文章

第1篇：Repo下载AOSP源码：基于ubuntu22.04 环境配置，android-12.0.0_r32
第2篇：Repo下载、编译AOSP源码：基于Ubuntu 21.04，android-12.1.0_r27

2. 配置Python

2.1 安装python3.9

添加ppa源，此源可安装多个python版本

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt install python3.9
sudo apt install python3.7 #不用的省略，此处只是告知此PPA源支持多个版本

2.2 查看系统中存在的Python版本

使用如下命令，发现系统中存在多个Python版本
sudo update-alternatives --list python

2.3 配置多Python版本共存

 sudo update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1
 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.10 2
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.7  3
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.93
szhou@bc03:~/works/aosp/aosp$

2.4 选定Python3.9为当前版本

如下选择列表中的第4个

szhou@bc03:~/works/aosp/aosp$ sudo update-alternatives --config python
There are 4 choices for the alternative python (providing /usr/bin/python).

  Selection    Path                 Priority   Status
------------------------------------------------------------
* 0            /usr/bin/python3.9    4         auto mode
  1            /usr/bin/python2.7    1         manual mode
  2            /usr/bin/python3.10   2         manual mode
  3            /usr/bin/python3.7    3         manual mode
  4            /usr/bin/python3.9    4         manual mode

Press <enter> to keep the current choice[*], or type selection number: 4

2.5 查看版本

设置完后，确认下版本，已设置为Python 3.9版本

szhou@bc03:~/works/aosp/aosp$ python -V
Python 3.9.12
szhou@bc03:~/works/aosp/aosp$

3. 下载 repo 工具

mkdir ~/bin
PATH=~/bin:$PATH
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo

4. 下载AOSP源码包

直接下载tar包速度更快，所以直接列出此方法

wget -c https://mirrors.tuna.tsinghua.edu.cn/aosp-monthly/aosp-latest.tar # 下载初始化包
tar xf aosp-latest.tar

5. 同步代码

联网同步经常会失败，失败后再次repo sync直到提示完全成功

5.1 联网同步最新代码

cd AOSP   # 解压得到的 AOSP 工程目录
# 这时 ls 的话什么也看不到，因为只有一个隐藏的 .repo 目录
repo sync

示例

szhou@bc03:~/works/aosp/aosp$ repo sync -j4
Fetching: 100% (1125/1125), done in 4m0.280s
Garbage collecting: 100% (1125/1125), done in 5.500s
Checking out: 100% (1125/1125), done in 2.929s
repo sync has finished successfully.
szhou@bc03:~/works/aosp/aosp$

5.2 不联网直接检出代码

此方法速度较快，直接从.repo仓库中检出代码
缺点就是代码不是最新的，切分支时候可能出现代码不同步的编译问题

cd AOSP   # 解压得到的 AOSP 工程目录
repo sync -l 仅checkout代码

6.切分支

6.1 查看可用分支

使用 git branch -a 可查看所有可用分支

szhou@bc03:~/works/aosp/aosp$cd .repo/manifests
szhou@bc03:~/works/aosp/aosp/.repo/manifests$ git branch -a

使用 git branch -a | grep “android-12” 只看S版本的分支


szhou@bc03:~/works/aosp/aosp/.repo/manifests$ git branch -a | grep "android-12"
  remotes/origin/android-12.0.0_r1
  remotes/origin/android-12.0.0_r10
  ……省略……
  remotes/origin/android-12.0.0_r19
  remotes/origin/android-12.0.0_r2
  remotes/origin/android-12.0.0_r20
  remotes/origin/android-12.0.0_r21
  remotes/origin/android-12.0.0_r25
  remotes/origin/android-12.0.0_r26
  remotes/origin/android-12.0.0_r27
  remotes/origin/android-12.0.0_r28
  remotes/origin/android-12.0.0_r29
  remotes/origin/android-12.0.0_r3
  remotes/origin/android-12.0.0_r30
  remotes/origin/android-12.0.0_r31
  remotes/origin/android-12.0.0_r32

如下在 -b 后面追加分支名称，执行 repo init命令
repo sync 同步分支代码

szhou@bc03:~/works/aosp/aosp$ repo init -u https://mirrors.tuna.tsinghua.edu.cn/git/AOSP/platform/manifest -b android-12.0.0_r32
.repo/manifests/: discarding 491 commits

Your identity is: szhou<szhou@amizhou.com>
If you want to change this, please re-run 'repo init' with --config-name

repo has been initialized in /home/szhou/works/aosp/aosp
szhou@bc03:~/works/aosp/aosp$ repo sync -j4

7.处理同Repo步错误

7.1 错误提示

正在终止
error: external/boringssl/: platform/external/boringssl checkout 8dbb9309b540a16b72b6cb23cc942e90a583cc32 
error: Cannot checkout platform/external/boringssl
Checking out: 13% (145/1051) platform/external/flatbufferserror: 工作区中下列未跟踪的文件将会因为检出操作而被覆盖：
     …… 省略 ……
        doc/vizualization/layout/pdf/sa-D1.pdf
        doc/vizualization/layout/pdf/sa-D2.pdf
        doc/vizualization/layout/pdf/sa-D2v.pd
正在终止
error: external/libabigail/: platform/external/libabigail checkout c1c139bd6553bfd924c65a30e922e154e9a160e6 
error: Cannot checkout platform/external/libabigail
Checking out: 60% (640/1051) platform/external/wycheprooferror.GitError: Cannot checkout platform/libcore: platform/libcore rev-list ('^d8d7f29bb1dd51d3ed2f6e2766fcf449f9b60ee7', 'HEAD', '--'): fatal: bad object d8d7f29bb1dd51d3ed2f6e2766fcf449f9b60ee7

error: Cannot checkout platform/libcore
Checking out: 100% (1051/1051), done in 1m12.279s

error: Unable to fully sync the tree.
error: Checking out local projects failed.
Failing repos:
external/boringssl
cts
external/libabigail
libcore
Try re-running with "-j1 --fail-fast" to exit at the first error.
szhou@bc04:~/aosp/aosp$

7.2 解决办法

（1）删除失败的.git仓库

szhou@bc04:~/aosp/aosp$ rm -rf .repo/projects/external/boringssl.git/
szhou@bc04:~/aosp/aosp$ rm -rf .repo/projects/external/libabigail.git/
szhou@bc04:~/aosp/aosp$ rm -rf .repo/projects/libcore.git/

szhou@bc04:~/aosp/aosp$ rm -rf external/boringssl
szhou@bc04:~/aosp/aosp$ rm -rf external/libabigail
szhou@bc04:~/aosp/aosp$ rm -rf libcore
szhou@bc04:~/aosp/aosp$

（2）删除失败的代码目录

若已有部分代码下载下来，则把其project代码目录删除，若还没有，这不用。

szhou@bc04:~/aosp/aosp$ rm -rf external/boringssl
szhou@bc04:~/aosp/aosp$ rm -rf external/libabigail
szhou@bc04:~/aosp/aosp$ rm -rf libcore
szhou@bc04:~/aosp/aosp$

（3）重新repo sync

如果再出现同样问题，重复1,2,3步骤，直到成功

（4）完成代码同步

        .prebuilt_info/prebuilt_info_hostsidetests_stagedinstall_testdata_apex__x86_com_android_apex_cts_shi
正在终止
error: cts/: platform/cts checkout 5e3383612940c9d71af5d131be1433e104367cee 
error: Cannot checkout platform/cts
正在更新文件: 100% (2294/2294), 完成./external/rust/crates/atty正在更新文件:  98% (2249/2294)
Checking out: 100% (1051/1051), done in 13.087s

error: Unable to fully sync the tree.
error: Checking out local projects failed.
Failing repos:
cts
Try re-running with "-j1 --fail-fast" to exit at the first error.
szhou@bc04:~/aosp/aosp$ rm -rf cts/     
szhou@bc04:~/aosp/aosp$ rm -rf .repo/projects/cts.git/

repo sync has finished successfully.

szhou@bc04:~/aosp/aosp$ repo sync
Fetching: 100% (1051/1051), done in 4m40.573s
Garbage collecting: 100% (1051/1051), done in 3.153s
正在更新文件: 100% (22773/22773), 完成.test/vts-testcase/performance正在更新文件:  30% (6979/22773)
Checking out: 100% (1051/1051), done in 45.428s
repo sync has finished successfully.
szhou@bc04:~/aosp/aosp$

8.编译测试

builder@mm-aosp:~/code$ source build/envsetup.sh 
builder@mm-aosp:~/code$ lunch 
Which would you like? [aosp_arm-eng] 42
15:22:15 Build sandboxing disabled due to nsjail error.
15:22:17 Build sandboxing disabled due to nsjail error.

============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=12
TARGET_PRODUCT=aosp_x86_64
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_ARCH=x86_64
TARGET_ARCH_VARIANT=x86_64
TARGET_2ND_ARCH=x86
TARGET_2ND_ARCH_VARIANT=x86_64
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-5.11.0-49-generic-x86_64-Ubuntu-14.04.5-LTS
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=SQ1D.220205.004
OUT_DIR=out
PRODUCT_SOONG_NAMESPACES=device/generic/goldfish device/generic/goldfish-opengl hardware/google/camera hardware/google/camera/devices/EmulatedCamera
============================================

builder@mm-aosp:~/code$ make -j32
builder@mm-aosp:~/code$

[ 99% 137251/137272] //frameworks/base/packages/SystemUI:SystemUI r8 [common]
Warning: Missing class android.compat.annotation.UnsupportedAppUsage (referenced from: void com.android.systemui.people.widget.PeopleBackupHelper.writeNewStateDescription(android.os.ParcelFileDescriptor))
Missing class android.support.annotation.Keep (referenced from: kotlinx.coroutines.android.AndroidExceptionPreHandler)
Missing class org.jetbrains.annotations.NotNull (referenced from: java.util.List com.android.keyguard.FontInterpolator$VarFontKey.sortedAxes and 4281 other contexts)
Missing class org.jetbrains.annotations.Nullable (referenced from: android.graphics.fonts.Font com.android.keyguard.FontInterpolator$InterpKey.l and 1038 other contexts)
Info: Stripped invalid locals information from 1 method.
Info in ./out/soong/.intermediates/frameworks/base/packages/SystemUI/SystemUI/android_common/combined/SystemUI.jar:kotlinx/coroutines/scheduling/WorkQueue.class:
  Methods with invalid locals information:
  void kotlinx.coroutines.scheduling.WorkQueue.offloadAllWork$kotlinx_coroutines_core(kotlinx.coroutines.scheduling.GlobalQueue)
  Type information in locals-table is inconsistent. Cannot constrain type: BOTTOM (empty) for value: v15 by constraint INT.
Info: Some warnings are typically a sign of using an outdated Java toolchain. To fix, recompile the source with an updated toolchain.
[100% 137272/137272] Target vbmeta image: out/target/product/generic_x86_64/vbmeta.img

#### build completed successfully (01:09:58 (hh:mm:ss)) ####

builder@mm-aosp:~/code$

9.结尾

一个简单的下代码，编译，每次总会遇到新问题，这次算是盘完了

Repo下载AOSP源码：基于ubuntu22.04 环境配置，android-12.0.0_r32

1. 前言

系列文章

2. 配置Python

2.1 安装python3.9

2.2 查看系统中存在的Python版本

2.3 配置多Python版本共存

2.4 选定Python3.9为当前版本

2.5 查看版本

3. 下载 repo 工具

4. 下载AOSP源码包

5. 同步代码

5.1 联网同步最新代码

5.2 不联网直接检出代码

6.切分支

6.1 查看可用分支

7.处理同Repo步错误

7.1 错误提示

7.2 解决办法

（1）删除失败的.git仓库

（2）删除失败的代码目录

（3）重新repo sync

（4）完成代码同步

8.编译测试

9.结尾

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