buildrepo: speed up by avoiding forks

buildrepo.in

@@ -53,12 +53,24 @@ build() {
 		[ -f "$aportsdir/$repo/$i" ] || continue
 		export REPODEST="$repodir"
 		cd "$aportsdir/$repo"/${i%/*} || return 1
-		if abuild -k -q up2date 2>/dev/null; then
+		pkgname=
+		pkgver=
+		pkgrel=
+		subpackages=
+		. ./APKBUILD
+
+		pkgs=
+		for subpkg in $pkgname $subpackages; do
+			pkgfile=${subpkg%:*}-$pkgver-r$pkgrel.apk
+			if ! [ -f "$REPODEST/$repo/$CARCH/$pkgfile" ]; then
+				pkgs="$pkgs $pkgfile"
+			fi
+		done
+		if [ -z "$pkgs" ]; then
 			continue
 		fi
 
 		# try link or copy the files if they are in the ports dir
-		pkgs=$(abuild listpkg)
 		if all_exist $pkgs; then
 			echo ">>> Copying " $pkgs
 			cp -p -l $pkgs "$repodir/$repo/$arch"/ 2>/dev/null \