i3/i3-sensible-editor

#!/bin/sh
# This script tries to exec an editor by trying some known editors if $EDITOR is
# not set.
#
# Distributions/packagers can enhance this script with a
# distribution-specific mechanism to find the preferred pager.
[ -n "$VISUAL" ] && which $VISUAL >/dev/null && exec $VISUAL "$@"
[ -n "$EDITOR" ] && which $EDITOR >/dev/null && exec $EDITOR "$@"

# Hopefully one of these is installed (no flamewars about preference please!):
which nano >/dev/null && exec nano "$@"
which vim >/dev/null && exec vim "$@"
which vi >/dev/null && exec vi "$@"
which emacs >/dev/null && exec emacs "$@"