feat: purge selected packages in one transaction

tests/unit/fakes/pacman/pacman

@@ -137,21 +137,20 @@ case $op in
 -Rs)
 	((print)) || exit 98
 	tg=${targets[0]}
-	if [[ -n ${FAKE_PACMAN_RS_REFUSE:-} || $tg == su-dummy-b ]]; then
+	if [[ -n ${FAKE_PACMAN_RS_REFUSE:-} || " ${targets[*]} " == *' su-dummy-b '* && " ${targets[*]} " != *' su-dummy-a '* ]]; then
 		echo "checking dependencies..."
 		echo ":: removing $tg breaks dependency '$tg' required by su-dummy-a"
 		echo "error: failed to prepare transaction (could not satisfy dependencies)" >&2
 		exit 1
 	fi
-	case $tg in
-	su-dummy-a) printf '%s\n' su-dummy-a su-dummy-b ;; # b was installed as a dependency of a
-	su-dummy-c | glib2 | expat | ca-certificates-mozilla | pfetch | su-dummy-aur) echo "$tg" ;; # (the last two: foreign, AUR)
-	*)
-		echo "error: target not found: $tg" >&2
-		exit 1
-		;;
-	esac
-	for r in ${FAKE_PACMAN_RS_EXTRA:-}; do [[ ${r%%:*} == "$tg" ]] && echo "${r#*:}"; done
+	for tg in "${targets[@]}"; do
+		case $tg in
+		su-dummy-a) printf '%s\n' su-dummy-a su-dummy-b ;;
+		su-dummy-b | su-dummy-c | glib2 | expat | ca-certificates-mozilla | pfetch | su-dummy-aur) echo "$tg" ;;
+		*) echo "error: target not found: $tg" >&2; exit 1 ;;
+		esac
+		for r in ${FAKE_PACMAN_RS_EXTRA:-}; do [[ ${r%%:*} == "$tg" ]] && echo "${r#*:}"; done
+	done
 	;;
 -Rns)
 	rc=$(fake_rc FAKE_PACMAN_RNS_RC 0)