ap: let builddirs use aports.recurs_until()

ap.in

@@ -51,35 +51,23 @@ subcmd.builddirs = {
 	run = function(opts)
 		local i, p, _
 		local visited = {}
-		local apkdb, rev = aports.init_apkdb(repodirs)
+		local db, rev = aports.init_apkdb(repodirs)
 		local to_print = {}
-		function recursdir(pn)
-			if pn == nil or visited[pn] or apkdb[pn] == nil then
-				return
+		for i = 2, #opts do
+			for _,p in pairs(db[opts[i]]) do
+				to_print[p.dir] = true
 			end
-			visited[pn] = true
-			local i, p
-			for i,p in pairs(apkdb[pn]) do
-				local _, d
-				for _, d in pairs(p.depends) do
-					recursdir(d)
-				end
-				for _, d in pairs(p.makedepends) do
-					recursdir(d)
 		end
+		for i = 2, #opts do
+			aports.recurs_until(db, opts[i], function(pn)
+				local j,p
+				for j, p in pairs(db[pn]) do
 					if to_print[p.dir] then
 						print(p.dir)
 						to_print[p.dir] = nil
 					end
 				end	
-		end
-		for i = 2, #opts do
-			for _,p in pairs(apkdb[opts[i]]) do
-				to_print[p.dir] = true
-			end
-		end
-		for i = 2, #opts do
-			recursdir(opts[i])
+			end)
 		end
 	end
 }