#! /bin/sh

set -e
editor=${MDW_EDITOR-ed}
case ${TMP+t},${TMPDIR+t} in
  t,) TMPDIR=$TMP; export TMPDIR ;;
esac
emacsclient=$(
  emacsclient --eval '(>= emacs-major-version 23)' 2>/dev/null || :)
[ -t 0 -a -t 1 ] || TERM=dumb
case "$EDITOR,$VISUAL,$TERM" in
  mdw-editor,mdw-editor,dumb | \
    mdw-editor,mdw-editor,emacs | \
    mdw-editor,mdw-editor,eterm*)
    editor=emacsclient emacsclient=nil;;
  mdw-editor,mdw-editor,*);;
  mdw-editor,*,*) editor=$VISUAL;;
  *,*,*) editor=$EDITOR;;
esac
case "$emacsclient" in
  t) exec emacsclient -nw -a "$editor" "$@";;
  *) exec $editor "$@";;
esac