pkg_resources: Support "frozen" resources (in R.py module).

pkg_resources/pkg_resources.py

@@ -1,9 +1,27 @@
-import os
+import uio
-import os.path
+
+c = {}
 
 def resource_stream(package, resource):
+    if package not in c:
+        try:
+            if package:
+                p = __import__(package + ".R", None, None, True)
+            else:
+                p = __import__("R")
+            c[package] = p.R
+        except ImportError:
+            if package:
                 p = __import__(package)
-    d = os.path.dirname(p.__file__)
+                d = p.__path__
+            else:
+                d = "."
             if d[0] != "/":
-        d = os.getcwd() + "/" + d
+                import uos
-    return open(d + "/" + resource, "rb")
+                d = uos.getcwd() + "/" + d
+            c[package] = d + "/"
+
+    p = c[package]
+    if isinstance(p, dict):
+        return uio.BytesIO(p[resource])
+    return open(p + resource, "rb")