[JUJU-2391] Fix wrong bases analysis. (#782)

* Fix wrong bases analysis.

* Add explicit dependencies in tox.ini as the new tox doesn't install

Co-authored-by: Caner Derici <caner.derici@canonical.com>

Author: juanmanuel-tirado

docs/readme.rst

@@ -11,8 +11,8 @@ Documentation: https://pythonlibjuju.readthedocs.io/en/latest/
 Requirements
 ------------
 
-* Python 3.6+
-* Juju 2.0+
+* Python 3.8/3.9/3.10
+* Tested using Juju 3.0.2
 
 
 Design Notes

juju/utils.py

@@ -385,9 +385,9 @@ def get_local_charm_base(series, channel_from_arg, charm_metadata,
         else:
             # Also check the charmcraft.yaml
             charmcraft_yaml = get_local_charm_charmcraft_yaml(charm_path)
-        if 'bases' in charmcraft_yaml:
-            channel_for_base = charmcraft_yaml['bases'][0]['run-on'][0]['channel']
-            os_name_for_base = charmcraft_yaml['bases'][0]['run-on'][0]['name']
+            if 'bases' in charmcraft_yaml:
+                channel_for_base = charmcraft_yaml['bases'][0]['run-on'][0]['channel']
+                os_name_for_base = charmcraft_yaml['bases'][0]['run-on'][0]['name']
 
     if channel_for_base == '':
         raise errors.JujuError("Unable to determine base for charm : %s" %

tox.ini

@@ -26,6 +26,11 @@ passenv =
     TEST_AGENTS
     LXD_DIR
 deps =
+    macaroonbakery
+    theblues
+    toposort
+    typing-inspect
+    paramiko
     asynctest
     ipdb
     mock