improve whatprovides and whatdepends support

bin/epm-whatdepends

@@ -24,9 +24,12 @@ epm_whatdepends()
 
 # by package name
 case $PMTYPE in
-	apt-rpm|apt-dpkg)
+	apt-rpm)
 		CMD="apt-cache whatdepends"
 		;;
+	apt-dpkg)
+		CMD="apt-cache rdepends"
+		;;
 	yum-rpm)
 		CMD="repoquery --whatrequires"
 		;;

bin/epm-whatprovides

@@ -27,6 +27,16 @@ case $PMTYPE in
 	conary)
 		CMD="conary repquery --what-provides"
 		;;
+	apt-rpm|apt-dpkg)
+		LANG=C docmd apt-get install --print-uris $pkg_filenames | grep "^Selecting" | cut -f2 -d" "
+		return
+		;;
+	yum-rpm)
+		CMD="yum whatprovides"
+		;;
+	zypper-rpm)
+		CMD="zypper what-provides"
+		;;
 	*)
 		fatal "Have no suitable command for $PMTYPE"
 		;;