$vim `which command` を手軽に

edit-command.sh

#!/bin/sh
#
# Edit command source
#

if [ $# -lt 1 ]; then
    echo 'Should specify commands you want to edit' 1>&2
    exit 1
fi

cmds=()
while [ $# -gt 0 ]; do
    cmds+=($(which "$1" 2> /dev/null))
    [ $? -ne 0 ] && echo "Command not found: $1" 1>&2
    shift
done

if [ ${#cmds[@]} -lt 1 ]; then
    exit 1
fi
exec ${EDITOR:-vim} "${cmds[@]}"