Getting the source
The GitHub repository of JSBSim is reachable at this link: github.com/JSBSim-Team/jsbsim. This repository mirrors the original one on SourceForge: sourceforge.net/projects/jsbsim.
What you need to download the source
You need to have the Git software installed. Git is a version control software, a system that records changes to a file or set of files over time so that you can recall specific versions later. The JSBSim software source code files are being version controlled by Git.
To install Git go to its download site and grab the version for your platform. You can choose to use Git locally on your computer in two ways: via one of the GUI clients, or through a command shell (e.g. a Bash shell on Linux or Windows).
Once you have installed Git, assuming you are going to use Git from the command shell, the JSBSim source code public repository can be cloned from one of the two following locations.
Downloading from SourceForge
In such case the Git command to clone the repo is (HTTPS mode)
> git clone https://git.code.sf.net/p/jsbsim/code jsbsim-code
or (SSH mode)
> git clone git://git.code.sf.net/p/jsbsim/code jsbsim-code
Downloading from GitHub
in such case the Git command to clone the repo is (HTTPS mode)
> git clone https://github.com/JSBSim-Team/jsbsim.git jsbsim-code
or (SSH mode)
> git clone git@github.com:JSBSim-Team/jsbsim.git jsbsim-code
