MacBook Pro 2017 Keyboard Mapping

#!/bin/bash
#
# Custom mapping for Apple MacBookPro 2017 keyboard.
#
# - Map §/± (SECTION) to `/~ (BACKQUOTE) to match US keyboard
# - Map CAPS LOCK (LOCK) to SHIFT (L_SHIFT) to locking
# - Map right CMD (R_CMD) to CAPS LOCK to enable locking if really wanted
# - Map `/~ to (BACKQUOTE) to SHIFT (L_SHIFT) to make SHIFT-^ easier
#
# To run at startup:
# sudo defaults write com.apple.loginwindow LoginHook `pwd`/remap.sh
# https://developer.apple.com/library/content/technotes/tn2450/_index.html
#
# Derived from https://gist.github.com/zbstof/6cba7d54e105cc5148c8a943d1581cad

FROM='"HIDKeyboardModifierMappingSrc"'
TO='"HIDKeyboardModifierMappingDst"'

ARGS=""
function Map # FROM TO
{
    CMD="${CMD:+${CMD},}{${FROM}: ${1}, ${TO}: ${2}}"
}

BACKQUOTE="0x700000035"
LOCK="0x700000039"
SECTION="0x700000064"
L_SHIFT="0x7000000E1"
R_CMD="0x7000000E7"

Map ${SECTION} ${BACKQUOTE}
Map ${LOCK} ${L_SHIFT}
Map ${R_CMD} ${LOCK}
Map ${BACKQUOTE} ${L_SHIFT}

hidutil property --set "{\"UserKeyMapping\":[${CMD}]}"