Wayland's Eagle is an EGL (Embedded-System Graphics Library) stack designed around the needs of Wayland and was used instead of Mesa's EGL support. EGL is another Khronos standard and is an interface used to tie in OpenGL ES with the underlying window system. Now this morning, the Eagle EGL stack has a working DRI2 back-end as of this commit.
Beyond the Eagle DRI2 back-end now working, the Eagle repository continues to see new work going into it every couple of days. The Wayland repository also continues to be actively developed.