BASH: Simple TimeStamp helper

ts-helper.sh

#!/usr/bin/env sh
# ts-helper.sh
# ------------------------------------------------------------------------------
# This is a demo of how to get aligned timestamps across any OS with python in
# the $PATH.
# ------------------------------------------------------------------------------
function ts() {
  local s_int=$(date +'%s')
  local s_len=${#s_int}
  local sns=$(python -c 'import time; print(int(time.time_ns()))')
  local s=${sns:0:$s_len}
  local ns=${sns:$s_len}
  printf "%s\n" "This helper ensures timestamp format alignment" \
                "across Unix, Linux, MacOS, and BSD operating systems." \
                "Note: It should function anywhere python is in the \$PATH " \
                "      and 'date' supports the '-u' and '-d' args." \
                "" \
                "s & ns:   $sns" \
                "s:        $s" \
                "ns:       $ns" \
                "ts-s:     $(date -ud @$s +'%FT%TZ')" \
                "ts-ns:    $(date -ud @$s +%FT%T.${ns}Z)" \
                "ts-ns-3:  $(date -ud @$s +%FT%T.${ns:0:3}Z)"
}

ts