I'm having trouble figuring out what's wrong with my files for compiling. the initial errors are pointing to the .h and corresponding part in the keymap.c files but it seems fine to me? i haven't even managed to get to figuring out the joystick part which is where i thought i would start having a bunch of trouble
Looking at what you've done I think the issue is your LAYOUT macro. You've got different sized nested arrays declared. In keymap.c you declare that keymaps is a MATRIX_ROWS by MATRIX_COLS array, but in your macro for LAYOUT you define the first 5 rows as having 7 entries, and the remaining 5 rows as having 6 entries so it can't work out if you want a 10x7 array or a 10x6 array.
Edit: also taking a look at config.h looks like MATRIX_COLS is defined as 6, so you've got 1 extra key defined in each of your first 5 rows.
Does your keyboard have asymmetric halves? The left having 7 columns and the right having 6? As the other commenter pointed out you have defined 6 columns but your layout macro in eiris.h has 7 elements for the left hand. I think the way to solve it is to define it as 7 columns, add NO_PIN to the end of MATRIX_COL_PINS_RIGHT and then just add XXX to the end of all the rows for the right half in your layout macro in eiris.h.