To install this into your LibreNMS installation please do the following:
Navigate to your LibreNMS plugin folder, e.g:
cd /opt/librenms/html/plugins/
Clone this git repo:
git clone https://github.com/blizko/DepMap.git
Activate the plugin:
From your LibreNMS Plugins menu, select "Plugin Admin".
On the "Plugin Admin":
Click on "Enable" next to the "DepMap" plugin.
To use this plugin, browse to the LibreNMS "Plugins" menu and select "Dependency Map".