!5747 fix tar_files.py for beta3

Merge pull request !5747 from FondMemoryVVV/toolchain

commonlibrary/toolchain/libc-test/tar_files.py

@@ -30,14 +30,16 @@ def copyFiles(sourceDir, targetDir):
         if not os.path.isfile(sourceF):
             if os.path.isdir(sourceF):
                 copyFiles(sourceF, targetF)
-        elif os.path.isfile(sourceF):
+            continue
         if os.path.exists(targetDir):
             copyFileCounts += 1
-                open(targetF, "wb").write(open(sourceF, "rb").read())
+            with open(targetF, "wb") as target_open:
+                target_open.write(open(sourceF, "rb").read())
         elif not os.path.exists(targetDir):
             os.makedirs(targetDir)
             copyFileCounts += 1
-                open(targetF, "wb").write(open(sourceF, "rb").read())
+            with open(targetF, "wb") as target_open:
+                target_open.write(open(sourceF, "rb").read())
 
 def make_targz_one_by_one(output_filename, source_dir):
     tar = tarfile.open(output_filename,"w")