gri3-wm/i3-sensible-editor

#!/bin/sh
#
# This code is released in public domain by Han Boetes <han@mijncomputer.nl>
#
# 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 editor

# Hopefully one of these is installed (no flamewars about preference please!):
for editor in "$VISUAL" "$EDITOR" nano nvim vim vi emacs pico qe mg jed gedit mc-edit; do
    if command -v "$editor" > /dev/null 2>&1; then
        exec "$editor" "$@"
    fi
done