allow for copying symlinks when copying tree to create zip

Author: nicholasjstock

lambda_uploader/utils.py

@@ -51,7 +51,11 @@ def copy_tree(src, dest, ignore=None, include_parent=False):
                 os.makedirs(pkg_path)
 
             LOG.debug("Copying %s to %s" % (path, pkg_path))
-            shutil.copy(path, pkg_path)
+            if os.path.islink(path):
+                linkto = os.readlink(path)
+                os.symlink(linkto, os.path.join(pkg_path, filename))
+            else:
+                shutil.copy(path, pkg_path)
 
 
 # Iterate through every item in ignore