add expand variable to modes

Author: dmarquez-splunk

pkg/private/tar/tar.bzl

@@ -105,7 +105,8 @@ def _pkg_tar_impl(ctx):
         args.add("--mtime", "portable")
     if ctx.attr.modes:
         for key in ctx.attr.modes:
-            args.add("--modes", "%s=%s" % (_quote(key), ctx.attr.modes[key]))
+            expanded_key = expand_variables(ctx, key)
+            args.add("--modes", "%s=%s" % (_quote(expanded_key), ctx.attr.modes[key]))
     if ctx.attr.owners:
         for key in ctx.attr.owners:
             args.add("--owners", "%s=%s" % (_quote(key), ctx.attr.owners[key]))