It came to my attention that:
The maven-eclipse-plugin (used in mvn eclipse:eclipse) is discontinued and shouldn't be used anymore. M2Eclipse replaces it for most, if not all, usage.
I work on a new project now, and the M2Eclipse doesn't update automatically the changes in my eclipse project.
My question is:
How to do the mvn eclipse:eclipse through the M2Eclipse plugin?
I believe it's equivalent Import an existing Maven Project. Elipse will do rest of the things. You might need to change your project to maven type.