Apparently mapping Eagle footprint layers to the KiCad Dwg_User
that were previously mapped to UNDEFINED_LAYER breaks the QA test
and causes the footprint editor to crash when opening Eagle
footprints. This means that the potential data loss issue when
loading Eagle footprints is still in play.
The Eagle plugin layers have to be mapped differently depending on
whether a board is being imported or a footprint library is being
cached. Footprint libraries can bypass the manual layer remapping
step that happens when importing a board.
Please note that when loading footprints in the footprint editor
and viewer, all layers that do not directly map to KiCad layers are
put on the Dwg_User layer so that there is data loss. Users will
have to manually remap objects to the correct layer as required.
This is less than ideal but until the footprint library table parser
supports prompting users to remap unknown layers, it will have to do.
Fixes: https://gitlab.com/kicad/code/kicad/-/issues/11839
ADDED Allow for user mapping of layers in Eagle import
ADDED Support required and optional layers in the layer mapping dialog
ADDED Add base class for plugins supporting remappable layers
Mark Roszko
Wayne Stambaugh
Jeff Young
jean-pierre charras
Jon Evans
Roberto Fernandez Bautista
Jan Mrázek
Michael Kavanagh