buildrepo: faster purging of old packages

buildrepo.in

@@ -33,9 +33,22 @@ usage() {
 
 
 listpackages() {
-	cd "$aportsdir/$1"
+	local repo="$1" i= pkgname= pkgver= pkgrel= subpackage= arch= subpkg=
+	cd "$aportsdir/$repo"
 	for i in */APKBUILD; do
-		APKBUILD=$i abuild listpkg
+		cd "$aportsdir/$repo"/${i%/*} || return 1
+		pkgname=
+		pkgver=
+		pkgrel=
+		subpackages=
+		arch=
+		. ./APKBUILD
+		if ! is_in all $arch && ! is_in "$CARCH" $arch; then
+			continue
+		fi
+		for subpkg in $pkgname $subpackages; do
+			echo ${subpkg%:*}-$pkgver-r$pkgrel.apk
+		done
 	done
 }