To install Xpilot-AI 1.1 from source (specifically on Ubuntu 12.04)
Download and run this script.
In other words:
wget http://xpilot-ai.org/downloads/xpilot-ai-1.1/xpilot-ai-1.1-linux.sh
chmod +x xpilot-ai-1.1-linux.sh
./xpilot-ai-1.1-linux.sh
To install Xpilot-ng-AI 0.9 from source (specifically on Ubuntu 12.04)
Download and run this script.
In other words:
wget http://xpilot-ai.org/downloads/xpilot-ng-ai-0.9/xpilot-ng-ai-0.9.sh
chmod +x xpilot-ng-ai-0.9.sh
./xpilot-ng-ai-0.9.sh
Update: Installing in Mac OS Sierra
Get Xcode from the App Store.
Open Xcode in order to agree to the Xcode/iOS license.
Install XQuartz from https://www.xquartz.org/
Download and run the script, and you will be given the option to install Xcode (or to install the Command Line Developer Tools).
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To install Xpilot-AI 1.0 from source (specifically on Mac OS X Snow Leopard w/ Xcode)
Download and run this script.
In other words:
curl -O http://xpilot-ai.org/downloads/xpilot-ai-1.0/xpilot-ai-1.0-mac.sh
chmod +x xpilot-ai-1.0-mac.sh
./xpilot-ai-1.0-mac.sh