An example of how to do 'verbose' mode and a dry-run mode together

dry-run and verbose example

#!/bin/bash

function echo_and_exec()
{
  echo "Executing $@" ; "$@"
}

function set_exec()
{
  if [ -z "${DRYRUN}" ]; then
    DRYRUN="false"
  fi
  if [ -z "${VERBOSE}" ]; then
    VERBOSE="false"
  fi

  if ${DRYRUN}; then
    EXEC="echo Not Executing "
  elif ${VERBOSE}; then
    EXEC="echo_and_exec"
  else
    EXEC=""
  fi
}

VERBOSE=true set_exec
${EXEC} ls
DRYRUN=true set_exec
${EXEC} ls