Skip pytask_collect_task_teardown if task is None. (#34)

Author: tobiasraabe

docs/changes.rst

@@ -12,6 +12,7 @@ all releases are available on `Anaconda.org <https://anaconda.org/pytask/pytask>
 - :gh:`31` adds ``pytask collect`` to show information on collected tasks.
 - :gh:`32` fixes ``pytask clean``.
 - :gh:`33` adds a module to apply common parameters to the command line interface.
+- :gh:`34` skips ``pytask_collect_task_teardown`` if task is None.
 
 
 0.0.8 - 2020-10-04

docs/rtd_environment.yml

@@ -1,7 +1,7 @@
 channels:
   - conda-forge
 dependencies:
-  - python
+  - python=3.8
   - ipython
   - sphinx
   - sphinx-copybutton

src/_pytask/collect.py

@@ -128,8 +128,8 @@ def pytask_collect_task_protocol(session, reports, path, name, obj):
         task = session.hook.pytask_collect_task(
             session=session, path=path, name=name, obj=obj
         )
-        session.hook.pytask_collect_task_teardown(session=session, task=task)
         if task is not None:
+            session.hook.pytask_collect_task_teardown(session=session, task=task)
             return CollectionReportTask.from_task(task)
 
     except Exception: