Send empty channel

The following sends an empty channel instead of guessing, so that the
controller can correctly determine the right channel for hinting.

Author: SimonRichardson

examples/charmhub.py examples/charmhub_info.pyexamples/charmhub.py renamed to examples/charmhub_info.py

@@ -1,6 +1,6 @@
 """
 Example to show how to connect to the current model and query the charm-hub
-store for information about a given charm.
+repository for information about a given charm.
 """
 import logging
 

juju/charmhub.py

@@ -8,14 +8,18 @@ def __init__(self, model):
 
     async def info(self, name, channel=None):
         """info displays detailed information about a CharmHub charm. The charm
-        can be specified by name or by path.
+        can be specified by the exact name.
+
+        Channel is a hint for providing the metadata for a given channel.
+        Without the channel hint then only the default release will have the
+        metadata.
 
         """
         if not name:
             raise JujuError("name expected")
 
         if channel is None:
-            channel = "latest"
+            channel = ""
 
         facade = self._facade()
         return await facade.Info(tag="application-{}".format(name), channel=channel)

juju/model.py

@@ -779,7 +779,7 @@ def relations(self):
 
     @property
     def charmhub(self):
-        """Return a charmhub store for requesting charm information using
+        """Return a charmhub repository for requesting charm information using
         the charm-hub-url model config.
 
         """