Fix ref to taskDefinition in describe_task_definition response (#5)

The response for `describe_task_definition` contains several top-level
keys, one of which is `taskDefinition`. In order to get task definition
specific attributes (e.g., `networkMode`), the top-level
`taskDefinition` key needs to be retrieved and assigned to `task_def`.

CHANGELOG.md

@@ -5,11 +5,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Fixed reference to taskDefinition in describe_task_definition response [#5](https://github.com/azavea/django-ecsmanage/pull/5)
 
 ## [0.1.0] - 2019-04-10
 ### Added
-- Update PyPi credentials [\#4](https://github.com/azavea/django-ecsmanage/pull/4)
-- Initialize Django module for one-off management commands [\#2](https://github.com/azavea/django-ecsmanage/pull/2)
+- Update PyPi credentials [#4](https://github.com/azavea/django-ecsmanage/pull/4)
+- Initialize Django module for one-off management commands [#2](https://github.com/azavea/django-ecsmanage/pull/2)
 
-[Unreleased]: https://github.com/azavea/django-ecsmanage/compare/0.1.0...HEAD
+[unreleased]: https://github.com/azavea/django-ecsmanage/compare/0.1.0...HEAD
 [0.1.0]: https://github.com/azavea/django-ecsmanage/releases/tag/0.1.0

ecsmanage/management/commands/ecsmanage.py

@@ -160,7 +160,9 @@ def run_task(self, config, task_def_arn, security_group_id, subnet_id, cmd):
         """
         overrides = {"containerOverrides": [{"name": "django", "command": cmd}]}
 
-        task_def = self.ecs_client.describe_task_definition(taskDefinition=task_def_arn)
+        task_def = self.ecs_client.describe_task_definition(
+            taskDefinition=task_def_arn
+        )["taskDefinition"]
 
         # Only the awsvpc network mode supports the networkConfiguration
         # input value.