12.ROS2 meta-function package

1. Introduction to Metapackages

Completing a systemic function may involve multiple packages. For example, implementing a robot navigation module might include sub-packages such as mapping, positioning, and path planning. So, when installing this module, does the user need to install each package individually?

Obviously, installing packages one by one is inefficient. ROS2 provides a way to bundle different packages into a single package. When installing a module, the packaged package, also known as a metapackage, can be directly invoked.

A metapackage is a file management system concept in Linux. It's a virtual package in ROS2. It doesn't contain any substantive content, but it relies on other packages. This method allows packages to be grouped together. Think of it like a table of contents like a book, telling you which sub-packages are within a package and where to downlo