Introduction

In Android repo tool, after initializing, there exist following directory under .repo:

project-objects projects

How these are organized?

Basically in projects, the layout is same as the one for the working directory, the project-objects layout is same as the files in the remote server.

While in the working directory for each project, as usual for git repository, there is a .git directory, which basically has bunch of symbol link to project-objects and projects directory.

repo sync

Two steps, first one is git fetch:

When doing fetching, it basically fetch the repository from remote and put it under directory .repo/projects and .repo/project-objects

Then doing git rebase to update the current working directory.