You must be running a 64-bit Linux distribution and must have installed some packages to build. Google recommends using Ubuntu for this and provides instructions for setting up the system (with Ubuntu-specific commands) on the Android Open Source Project website.
Once you have set up your machine according to the instructions by Google, return here and carry on with the rest of the instructions.
Repo is a tool provided by Google that simplifies using Git in the context of the Android source.
# Make a directory where Repo will be stored and add it to the path
$ mkdir ~/.bin
$ PATH=~/.bin:$PATH
# Download Repo itself
$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/.bin/repo
# Make Repo executable
$ chmod a+x ~/.bin/repo
# Create a directory for the source files
# You can name this directory however you want, just remember to replace
# WORKSPACE with your directory for the rest of this guide.
# This can be located anywhere (as long as the fs is case-sensitive)
$ mkdir WORKSPACE
$ cd WORKSPACE
# Install Repo in the created directory
# Use a real name/email combination, if you intend to submit patches
$ repo init -u https://github.com/EuclideanOS/android_manifest -b nougat-mr2
This is what you will run each time you want to pull in upstream changes. Keep in mind that on your first run, it is expected to take a while as it will download all the required Android source files and their change histories.
# Let Repo take care of all the hard work
#
# The -j# option specifies the number of concurrent download threads to run.
# 4 threads is a good number for most internet connections.
# You may need to adjust this value if you have a particularly slow connection.
$ repo sync -j4
In case you are not interested in syncing all the projects, you can specify what projects you do want to sync. This can help if, for example, you want to make a quick change and quickly push it back for review. You should note that this can sometimes cause issues when building if there is a large change that spans across multiple projects.
# Specify one or more projects by either name or path
# For example, enter EuclideanOS/android_frameworks_base or
# frameworks/base to sync the frameworks/base repository
$ repo sync PROJECT
The bundled builder tool ./rom-build.sh
handles all the building steps for the specified device
automatically. As the device value, you just feed it with the device codename (for example,
'hammerhead' for the Nexus 5).
# Go to the root of the source tree...
$ cd WORKSPACE
# ...and run the builder tool.
$ ./rom-build.sh DEVICE
Our codebase is licensed under Apache License, Version 2.0 unless otherwise specified. Apache License 2.0 allows a variety of actions on the content as long as licensing and copyright notices are retained and included with the code and your changes to the codebase are stated.
You can read the full license text at http://www.apache.org/licenses/LICENSE-2.0
Unless otherwise specified, all our assets, including but not limited to images, are licensed under Creative Commons Attribution-NonCommercial 4.0 International, or CC BY-NC 4.0 for short. This means that you are allowed to modify the aforementioned assets in any way you want and you are free to share the originals and/or the modified work. However, you are not allowed to use the assets for commercial purposes and you must provide attribution at all times which means you have to include a short note about the license used (CC BY-NC 4.0), the original author/authors (Euclidean OS) and inform about any changes that have been made. A link to the website should usually be included as well.
You can reach the full legal text at http://creativecommons.org/licenses/by-nc/4.0/