Swap capslock and escape on macos

swap.sh

#!/bin/bash

# Check current mapping and extract relevant content
CURRENT_MAPPING=$(hidutil property --get "UserKeyMapping" | grep "HIDKeyboardModifierMappingSrc")

# Define the swap mapping
SWAP_MAPPING='{
    "UserKeyMapping": [
        {
            "HIDKeyboardModifierMappingSrc": 0x700000029,
            "HIDKeyboardModifierMappingDst": 0x700000039
        },
        {
            "HIDKeyboardModifierMappingSrc": 0x700000039,
            "HIDKeyboardModifierMappingDst": 0x700000029
        }
    ]
}'

# If CURRENT_MAPPING is not empty, that means a remap is currently active, so we clear it
if [[ -n "$CURRENT_MAPPING" ]]; then
    hidutil property --set '{"UserKeyMapping": []}'
    echo "Caps Lock and Escape keys have been restored to default."
else
    hidutil property --set "$SWAP_MAPPING"
    echo "Caps Lock and Escape keys have been swapped."
fi