#!/usr/bin/env zsh
set -e
-$0:h/cmd/muttrc-gen.sh > mutt.rc
+muttrc_their=`$0:h/cmd/muttrc-gen.sh`
+[[ -r mutt.rc ]] && muttrc_our=`cat mutt.rc` || :
+[[ "$muttrc_our" = "$muttrc_their" ]] || cat > mutt.rc <<EOF
+$muttrc_their
+EOF
mutt -e "source mutt.rc" -y