How to reset the iOS simulator properly

reset-sim.sh

# source this in your Bash scripts

reset-sim() {
    printf 'Close the frontend app if needed…'
    killall iOS\ Simulator 2>&- && sleep 5 || true
    printf ' Done.\n'

    declare SIM_OS SIM SIM_ID
    while read SIM
    do
        if [[ "$SIM" =~ ^--\ iOS\ (.+)\ --$ ]]
        then
            SIM_OS="${BASH_REMATCH[1]}"
            continue
        fi
        [[ ! "$SIM" =~ unavailable ]] || continue
        SIM_ID="${SIM%%)*}"
        SIM_ID="${SIM_ID#* (}"
        [[ "$SIM_ID" =~ [0-9A-F\-]{36} ]] || continue
        printf 'Resetting [%21s] simulator…' "${SIM%% (*}/$SIM_OS"
        [[ "$SIM" =~ Shutdown ]] || xcrun simctl shutdown "$SIM_ID"
        xcrun simctl erase "$SIM_ID"
        # BUG: 'simctl erase' doesn't re-create the 'Documents' folder
        mkdir -p "$HOME/Library/Developer/CoreSimulator/Devices/$SIM_ID/data/Documents"
        printf ' Done.\n'
    done < <(xcrun simctl list devices)
}

# $ reset-sim
# Close the frontend app if needed… Done.
# Resetting [        iPhone 4s/7.1] simulator… Done.
# Resetting [         iPhone 5/7.1] simulator… Done.
# Resetting [        iPhone 5s/7.1] simulator… Done.
# Resetting [           iPad 2/7.1] simulator… Done.
# Resetting [      iPad Retina/7.1] simulator… Done.
# Resetting [         iPad Air/7.1] simulator… Done.
# Resetting [        iPhone 4s/8.0] simulator… Done.
# Resetting [         iPhone 5/8.0] simulator… Done.
# Resetting [        iPhone 5s/8.0] simulator… Done.
# Resetting [    iPhone 6 Plus/8.0] simulator… Done.
# Resetting [         iPhone 6/8.0] simulator… Done.
# Resetting [           iPad 2/8.0] simulator… Done.
# Resetting [      iPad Retina/8.0] simulator… Done.
# Resetting [         iPad Air/8.0] simulator… Done.
# Resetting [ Resizable iPhone/8.0] simulator… Done.
# Resetting [   Resizable iPad/8.0] simulator… Done.