用repo下载Android源代码

Question

When I give these commands then the 2.3.7 branch gets initialized in current directory and source gets downloaded.

repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.7_r1

repo sync

Thereafter if I give following command what exactly happens

repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1

or

repo init -u https://android.googlesource.com/platform/manifest 

My Questions

1. Will my earlier branch be deleted which I have downloaded with great difficulty? Cant I have multiple branches existing simultaneously?

2. If I can have more than one branch then how to access them? I dont see any directory called 2.3.7 or 4.0.1.

3. The repo directory structure is very confusing. Can anybody guide?

Answer 1

You should start a new repo branch within the same source code branch

 repo start BRANCH_NAME [PROJECT_LIST]

Also refer to the following book on how to switch and make use to features in git

Look at section on branching and merging . Create branch using repo and then git commands to move around

Answer 2

I see that you want to sync a new branch while using the files downloaded at previous sync to save download time.

1. create a new directory
2. copy the .repo file (hidden) from the old branch_folder (gingerbread in your case) to a new directory
3. cd into that directory

Finally you can do:

repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1
repo sync

Answer 3

You should do a repo init in a different directory. repo init clones the git structure specified by the manifest file eg

android/gingerbread/repo init

android/eclair/repo init