dry-run function

simple_dryrun

#!/bin/bash

while getopts d OPT
do
  case $OPT in
    "d" ) DRY="y"; echo "[DRY RUN MODE]" ;;
  esac
done

function execute() {
  echo "COMMAND: ${@}"

  if [[ $DRY == "y" ]]; then
    return 0
  fi

  eval "$@"
}

execute "ls -la"
execute "pwd"
execute "echo \'Hello, world.\'"