ninja:tldr:4a40e

The command you provided is "ninja -C ${path-to-directory}".

Here's the explanation of each component:

• "ninja" is the name of the command being executed. Ninja is a build system that is often used as an alternative to tools like make. It is designed to be fast and minimize unnecessary recompilation.
• "-C" is an option used to specify the directory where Ninja should change into before performing any build tasks.
• "${path-to-directory}" is a placeholder that should be replaced with the actual path to the directory where the build should take place.

So, in summary, this command is running the build system Ninja, changing into the specified directory, and performing the necessary build tasks in that directory.