Parsing Command Line Arguments

getopts command can be used to parse single character options e.g. -a or -al

For long options with arguments e.g. --env dev --db test, see script below:

#!/bin/bash
while [ "${1:-}" != "" ]; do
  case "$1" in
    "--env")
      shift
      export NODE_ENV=$1 #do something with long option arg
      ;;
    "--db")
      shift
      export DB_NAME=$1 #do something with long option arg
      ;;
    *)
      exit 1
      ;;
  esac
  shift
done