#!/bin/bash
setglobal NEEDED_PROGRAMS = ''( curl git rsync ssh )
setglobal FAILED = '0'
for binary in [$(NEEDED_PROGRAMS[@])] {
  if ! which $binary >/dev/null {
    setglobal FAILED = '1'
    echo "Unable to locate $binary on the path." > !2
  }
}

if [[ $FAILED != 0 ]] {
  echo "Please see above error output to determine which programs you need to install or make available on your path. Aborting." > !2
  exit 1
}