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The Android source tree is located in a Git repository hosted by Google. The Git repository includes metadata for the Android source, including those related to changes to the source and the date they were made. This document describes how to download the source tree for a specific Android code-line. To instead start with a factory image for a specific device, see.
Installing Repo Repo is a tool that makes it easier to work with Git in the context of Android. For more information about Repo, see the. To install Repo: • Make sure you have a bin/ directory in your home directory and that it is included in your path: mkdir ~/bin PATH=~/bin:$PATH • Download the Repo tool and ensure that it is executable: curl > ~/bin/repo chmod a+x ~/bin/repo For version 1.21, the SHA-1 checksum for repo is b8bd1804f432ecf1bab730949c82b93b0fc5fede. For version 1.22, the SHA-1 checksum for repo is da0514e484f74648a890c0467d61ca415379f791.
For version 1.23, the SHA-256 checksum for repo is e1c40cfd7d5e6f332c6ee74c4eab4d24e2694b3b0a0c037bf51dc5. Initializing a Repo client After installing Repo, set up your client to access the Android source repository: • Create an empty directory to hold your working files. If you're using MacOS, this has to be on a case-sensitive filesystem. Give it any name you like: mkdir WORKING_DIRECTORY cd WORKING_DIRECTORY • Configure git with your real name and email address.
To use the Gerrit code-review tool, you will need an email address that is connected with a. Make sure this is a live address at which you can receive messages. The name that you provide here will show up in attributions for your code submissions. Git config --global user.name 'Your Name' git config --global user.email 'you@example.com' • Run repo init to bring down the latest version of Repo with all its most recent bug fixes. You must specify a URL for the manifest, which specifies where the various repositories included in the Android source will be placed within your working directory. Repo init -u To check out a branch other than 'master', specify it with -b.
For a list of branches, see. Repo init -u -b android-4.0.1_r1 A successful initialization will end with a message stating that Repo is initialized in your working directory.
Your client directory should now contain a.repo directory where files such as the manifest will be kept. Downloading the Android source tree To pull down the Android source tree to your working directory from the repositories as specified in the default manifest, run repo sync The Android source files will be located in your working directory under their project names. The initial sync operation will take an hour or more to complete.
For more about repo sync and other Repo commands, see. Using Authentication By default, access to the Android source code is anonymous. To protect the servers against excessive usage, each IP address is associated with a quota.
When sharing an IP address with other users (e.g. When accessing the source repositories from beyond a NAT firewall), the quotas can trigger even for regular usage patterns (e.g. If many users sync new clients from the same IP address within a short period). In that case, it is possible to use authenticated access, which then uses a separate quota for each user, regardless of the IP address.
The first step is to create a password with and follow the instructions on the password generator page. The second step is to force authenticated access by using the following manifest URI: Notice how the /a/ directory prefix triggers mandatory authentication. You can convert an existing client to use mandatory authentication with the following command: repo init -u Troubleshooting network issues When downloading from behind a proxy (which is common in some corporate environments), it might be necessary to explicitly specify the proxy that is then used by Repo: export HTTP_PROXY=export HTTPS_PROXY=More rarely, Linux clients experience connectivity issues, getting stuck in the middle of downloads (typically during 'Receiving objects'). It has been reported that tweaking the settings of the TCP/IP stack and using non-parallel commands can improve the situation.