Stop returning dotted directory names in os.matchdirs()

src/base/os.lua

@@ -220,7 +220,6 @@
 ---
 
 	function os.match(mask, matchFiles)
-
 		-- Strip any extraneous weirdness from the mask to ensure a good
 		-- match against the paths returned by the OS. I don't know if I've
 		-- caught all the possibilities here yet; will add more as I go.
@@ -256,12 +255,15 @@
 			while os.matchnext(m) do
 				local isfile = os.matchisfile(m)
 				if (matchFiles and isfile) or (not matchFiles and not isfile) then
-					local fname = path.join(basedir, os.matchname(m))
+					local fname = os.matchname(m)
+					if isfile or not fname:startswith(".") then
+						fname = path.join(basedir, fname)
 						if fname:match(mask) == fname then
 							table.insert(result, fname)
 						end
 					end
 				end
+			end
 			os.matchdone(m)
 
 			-- check subdirectories

tests/base/test_os.lua

@@ -40,6 +40,17 @@
 
 
 
+--
+-- os.matchdirs() tests
+--
+
+	function suite.matchdirs_skipsDottedDirs()
+		local result = os.matchdirs("*")
+		test.isfalse(table.contains(result, ".."))
+	end
+
+
+
 --
 -- os.matchfiles() tests
 --