#!/bin/sh
# mindep PKGS... - minimize list of PKGS by removing implicit dependencies

rdeps() {
	for pkg; do
		echo "$pkg>=0"
		xbps-query -Rx $pkg
	done | xargs -d'\n' -rn1 xbps-uhelper getpkgdepname | sort -u
}

RDEPS="$@"
ORDEPS=

while [ "$RDEPS" != "$ORDEPS" ]; do
	ORDEPS=$RDEPS
	RDEPS=$(rdeps $RDEPS)
	echo RDEPS $RDEPS
done	

ORDEPS=
while [ "$RDEPS" != "$ORDEPS" ]; do
	ORDEPS=$RDEPS
	SAT=
	for pkg in $RDEPS; do
		SAT=$({
		printf '%s\n' $SAT
		rdeps $pkg | grep -vx $pkg
		} | sort -u)
	done
	RDEPS=$(echo "$RDEPS" | grep -Fvx -e "$SAT" | sort -u)
done	

echo $RDEPS