Recursively resolving `which` utilities

whiches.bash

_rwhich_1() {
  readlink -e "$(command -v "$1")"
}
_rwhich_comp() {
  mapfile -t COMPREPLY < <(compgen -c "${COMP_WORDS[COMP_CWORD]}")
  return 0
}

# recursively resolve commands ("recursive `which`")
rwhich() {
  for cmd in "$@" ; do
    _rwhich_1 "$cmd"
  done
}
complete -F _rwhich_comp rwhich

# recursively resolve commands and run them through `ls -alF`
lwhich() {
  for cmd in "$@" ; do
    local resolved="$(_rwhich_1 "$cmd")"
    if [ -n "$resolved" ] ; then
      ls --color=auto -alF "$resolved"
    fi
  done
}
complete -F _rwhich_comp lwhich

# recursively resolve commands and open them in a pager
pwhich() {
  local files=()
  mapfile -t files < <(rwhich "$@")
  if [ ${#files[@]} -gt 0 ] ; then
    "${PAGER:-pager}" "${files[@]}"
  fi
}
complete -F _rwhich_comp pwhich

# recursively resolve commands and open them in an editor
ewhich() {
  local files=()
  mapfile -t files < <(rwhich "$@")
  if [ ${#files[@]} -gt 0 ] ; then
    "${VISUAL:-${EDITOR:-editor}}" "${files[@]}"
  fi
}
complete -F _rwhich_comp ewhich

# recursively resolve commands and concatenate their files
cwhich() {
  local files=()
  mapfile -t files < <(rwhich "$@")
  if [ ${#files[@]} -gt 0 ] ; then
    cat "${files[@]}"
  fi
}
complete -F _rwhich_comp cwhich