Simple bash functions for expanding/unexpanding a set of files

expand_unexpand.sh

unexpand_files() {
  (
    set -e -o pipefail
    first_only='--first-only'
    args=''
    OPTIND=1
    while getopts "at:" opt; do
      case "$opt" in
        a) args="$args -a"; first_only='';;
        t) args="$args -t $OPTARG";;
      esac
    done
    shift $((OPTIND - 1))
    for file in $@; do
      tmpfile="$(mktemp)"
      unexpand $args $first_only "$file" > "$tmpfile"
      cp "$tmpfile" "$file"
      rm "$tmpfile"
    done
  )
}

expand_files() {
  (
    set -e -o pipefail
    initial='-i'
    args=''
    OPTIND=1
    while getopts "at:" opt; do
      case "$opt" in
        a) args="$args -a"; initial='';;
        t) args="$args -t $OPTARG";;
      esac
    done
    shift $((OPTIND - 1))
    for file in $@; do
      tmpfile="$(mktemp)"
      expand $args $initial "$file" > "$tmpfile"
      cp "$tmpfile" "$file"
      rm "$tmpfile"
    done
  )
}