| <html devsite> |
| <head> |
| <title>Downloading the Source</title> |
| <meta name="project_path" value="/_project.yaml" /> |
| <meta name="book_path" value="/_book.yaml" /> |
| </head> |
| <body> |
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| Copyright 2017 The Android Open Source Project |
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| Licensed under the Apache License, Version 2.0 (the "License"); |
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| |
| |
| |
| <p> |
| 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. |
| </p> |
| <p> |
| To instead start with a factory image for a specific device, see |
| <a href="running.html#selecting-device-build">Selecting a device build</a>. |
| </p> |
| <h2 id="installing-repo"> |
| Installing Repo |
| </h2> |
| <p> |
| Repo is a tool that makes it easier to work with Git in the context of |
| Android. For more information about Repo, see the |
| <a href="../develop/repo.html">Repo Command Reference</a>. |
| </p> |
| <p> |
| To install Repo: |
| </p> |
| <ol> |
| <li> |
| <p> |
| Make sure you have a <code>bin/</code> directory in your home directory |
| and that it is included in your path: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">mkdir ~/bin</code> |
| <code class="devsite-terminal">PATH=~/bin:$PATH</code> |
| </pre> |
| </li> |
| <li> |
| <p> |
| Download the Repo tool and ensure that it is executable: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo</code> |
| <code class="devsite-terminal">chmod a+x ~/bin/repo</code> |
| </pre> |
| </li> |
| </ol> |
| <p> |
| For version 1.21, the SHA-1 checksum for repo is |
| <code>b8bd1804f432ecf1bab730949c82b93b0fc5fede</code>. |
| </p> |
| <p> |
| For version 1.22, the SHA-1 checksum for repo is |
| <code>da0514e484f74648a890c0467d61ca415379f791</code>. |
| </p> |
| <p> |
| For version 1.23, the SHA-256 checksum for repo is |
| <code>e147f0392686c40cfd7d5e6f332c6ee74c4eab4d24e2694b3b0a0c037bf51dc5</code>. |
| </p> |
| <h2 id="initializing-a-repo-client"> |
| Initializing a Repo client |
| </h2> |
| <p> |
| After installing Repo, set up your client to access the Android source |
| repository: |
| </p> |
| <ol> |
| <li> |
| <p> |
| 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: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">mkdir WORKING_DIRECTORY</code> |
| <code class="devsite-terminal">cd WORKING_DIRECTORY</code> |
| </pre> |
| </li> |
| <li> |
| <p> |
| 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 <a href= |
| "https://www.google.com/accounts">registered Google account</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. |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">git config --global user.name "Your Name"</code> |
| <code class="devsite-terminal">git config --global user.email "you@example.com"</code> |
| </pre> |
| </li> |
| <li> |
| <p> |
| Run <code>repo init</code> 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. |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| repo init -u https://android.googlesource.com/platform/manifest |
| </pre> |
| <p> |
| To check out a branch other than "master", specify it with <code>-b</code>. |
| For a list of branches, see <a href="../start/build-numbers.html#source-code-tags-and-builds"> |
| Source Code Tags and Builds</a>. |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1 |
| </pre> |
| </li> |
| </ol> |
| <p> |
| A successful initialization will end with a message stating that Repo is |
| initialized in your working directory. Your client directory should now |
| contain a <code>.repo</code> directory where files such as the manifest will |
| be kept. |
| </p> |
| <h2 id="getting-the-files"> |
| Downloading the Android source tree |
| </h2> |
| <p> |
| To pull down the Android source tree to your working directory from the |
| repositories as specified in the default manifest, run |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy">repo sync</pre> |
| <p> |
| 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 <code>repo sync</code> and other Repo commands, see |
| <a href="../develop/index.html">Developing</a>. |
| </p> |
| <h2 id="using-authentication"> |
| Using Authentication |
| </h2> |
| <p> |
| 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. |
| </p> |
| <p> |
| 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). |
| </p> |
| <p> |
| In that case, it is possible to use authenticated access, which then uses a |
| separate quota for each user, regardless of the IP address. |
| </p> |
| <p> |
| The first step is to create a password with <a href= |
| "https://android.googlesource.com/new-password">the password generator</a> |
| and follow the instructions on the password generator page. |
| </p> |
| <p> |
| The second step is to force authenticated access by using the following |
| manifest URI: <code>https://android.googlesource.com/a/platform/manifest</code>. |
| Notice how the <code>/a/</code> directory prefix triggers mandatory |
| authentication. You can convert an existing client to use mandatory |
| authentication with the following command: |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| repo init -u https://android.googlesource.com/a/platform/manifest |
| </pre> |
| <h2 id="troubleshooting-network-issues"> |
| Troubleshooting network issues |
| </h2> |
| <p> |
| 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: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">export HTTP_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port></code> |
| <code class="devsite-terminal">export HTTPS_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port></code> |
| </pre> |
| <p> |
| 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. You need root access to modify the TCP |
| setting: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">sudo sysctl -w net.ipv4.tcp_window_scaling=0</code> |
| <code class="devsite-terminal">repo sync -j1</code> |
| </pre> |
| <h2 id="using-a-local-mirror"> |
| Using a local mirror |
| </h2> |
| <p> |
| When using several clients, especially in situations where bandwidth is |
| scarce, it is better to create a local mirror of the entire server content, |
| and to sync clients from that mirror (which requires no network access). The |
| download for a full mirror is smaller than the download of two clients, while |
| containing more information. |
| </p> |
| <p> |
| These instructions assume that the mirror is created in |
| <code>/usr/local/aosp/mirror</code>. The first step is to create and sync the |
| mirror itself. Notice the <code>--mirror</code> flag, which can be specified |
| only when creating a new client: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">mkdir -p /usr/local/aosp/mirror</code> |
| <code class="devsite-terminal">cd /usr/local/aosp/mirror</code> |
| <code class="devsite-terminal">repo init -u https://android.googlesource.com/mirror/manifest --mirror</code> |
| <code class="devsite-terminal">repo sync</code> |
| </pre> |
| <p> |
| Once the mirror is synced, new clients can be created from it. Note that it's |
| important to specify an absolute path: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">mkdir -p /usr/local/aosp/master</code> |
| <code class="devsite-terminal">cd /usr/local/aosp/master</code> |
| <code class="devsite-terminal">repo init -u /usr/local/aosp/mirror/platform/manifest.git</code> |
| <code class="devsite-terminal">repo sync</code> |
| </pre> |
| <p> |
| Finally, to sync a client against the server, the mirror needs to be synced |
| against the server, then the client against the mirror: |
| </p> |
| <pre class="devsite-click-to-copy"> |
| <code class="devsite-terminal">cd /usr/local/aosp/mirror</code> |
| <code class="devsite-terminal">repo sync</code> |
| <code class="devsite-terminal">cd /usr/local/aosp/master</code> |
| <code class="devsite-terminal">repo sync</code> |
| </pre> |
| <p> |
| It's possible to store the mirror on a LAN server and to access it over NFS, |
| SSH or Git. It's also possible to store it on a removable drive and to pass |
| that drive around between users or between machines. |
| </p> |
| <h2 id="verifying-git-tags"> |
| Verifying Git tags |
| </h2> |
| <p> |
| Load the following public key into your GnuPG key database. The key is used to |
| sign annotated tags that represent releases. |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| gpg --import |
| </pre> |
| <p> |
| Copy and paste the key below, then enter EOF (Ctrl-D) to end the input and |
| process the keys. |
| </p> |
| <pre class="devsite-click-to-copy"> |
| -----BEGIN PGP PUBLIC KEY BLOCK----- |
| Version: GnuPG v1.4.2.2 (GNU/Linux) |
| |
| mQGiBEnnWD4RBACt9/h4v9xnnGDou13y3dvOx6/t43LPPIxeJ8eX9WB+8LLuROSV |
| lFhpHawsVAcFlmi7f7jdSRF+OvtZL9ShPKdLfwBJMNkU66/TZmPewS4m782ndtw7 |
| 8tR1cXb197Ob8kOfQB3A9yk2XZ4ei4ZC3i6wVdqHLRxABdncwu5hOF9KXwCgkxMD |
| u4PVgChaAJzTYJ1EG+UYBIUEAJmfearb0qRAN7dEoff0FeXsEaUA6U90sEoVks0Z |
| wNj96SA8BL+a1OoEUUfpMhiHyLuQSftxisJxTh+2QclzDviDyaTrkANjdYY7p2cq |
| /HMdOY7LJlHaqtXmZxXjjtw5Uc2QG8UY8aziU3IE9nTjSwCXeJnuyvoizl9/I1S5 |
| jU5SA/9WwIps4SC84ielIXiGWEqq6i6/sk4I9q1YemZF2XVVKnmI1F4iCMtNKsR4 |
| MGSa1gA8s4iQbsKNWPgp7M3a51JCVCu6l/8zTpA+uUGapw4tWCp4o0dpIvDPBEa9 |
| b/aF/ygcR8mh5hgUfpF9IpXdknOsbKCvM9lSSfRciETykZc4wrRCVGhlIEFuZHJv |
| aWQgT3BlbiBTb3VyY2UgUHJvamVjdCA8aW5pdGlhbC1jb250cmlidXRpb25AYW5k |
| cm9pZC5jb20+iGAEExECACAFAknnWD4CGwMGCwkIBwMCBBUCCAMEFgIDAQIeAQIX |
| gAAKCRDorT+BmrEOeNr+AJ42Xy6tEW7r3KzrJxnRX8mij9z8tgCdFfQYiHpYngkI |
| 2t09Ed+9Bm4gmEO5Ag0ESedYRBAIAKVW1JcMBWvV/0Bo9WiByJ9WJ5swMN36/vAl |
| QN4mWRhfzDOk/Rosdb0csAO/l8Kz0gKQPOfObtyYjvI8JMC3rmi+LIvSUT9806Up |
| hisyEmmHv6U8gUb/xHLIanXGxwhYzjgeuAXVCsv+EvoPIHbY4L/KvP5x+oCJIDbk |
| C2b1TvVk9PryzmE4BPIQL/NtgR1oLWm/uWR9zRUFtBnE411aMAN3qnAHBBMZzKMX |
| LWBGWE0znfRrnczI5p49i2YZJAjyX1P2WzmScK49CV82dzLo71MnrF6fj+Udtb5+ |
| OgTg7Cow+8PRaTkJEW5Y2JIZpnRUq0CYxAmHYX79EMKHDSThf/8AAwUIAJPWsB/M |
| pK+KMs/s3r6nJrnYLTfdZhtmQXimpoDMJg1zxmL8UfNUKiQZ6esoAWtDgpqt7Y7s |
| KZ8laHRARonte394hidZzM5nb6hQvpPjt2OlPRsyqVxw4c/KsjADtAuKW9/d8phb |
| N8bTyOJo856qg4oOEzKG9eeF7oaZTYBy33BTL0408sEBxiMior6b8LrZrAhkqDjA |
| vUXRwm/fFKgpsOysxC6xi553CxBUCH2omNV6Ka1LNMwzSp9ILz8jEGqmUtkBszwo |
| G1S8fXgE0Lq3cdDM/GJ4QXP/p6LiwNF99faDMTV3+2SAOGvytOX6KjKVzKOSsfJQ |
| hN0DlsIw8hqJc0WISQQYEQIACQUCSedYRAIbDAAKCRDorT+BmrEOeCUOAJ9qmR0l |
| EXzeoxcdoafxqf6gZlJZlACgkWF7wi2YLW3Oa+jv2QSTlrx4KLM= |
| =Wi5D |
| -----END PGP PUBLIC KEY BLOCK----- |
| </pre> |
| <p> |
| After importing the keys, you can verify any tag with |
| </p> |
| <pre class="devsite-terminal devsite-click-to-copy"> |
| git tag -v TAG_NAME |
| </pre> |
| |
| </body> |
| </html> |
