reubenvanammers opened a new pull request #4156: [AIRFLOW-3314] Changed auto inlets feature to work as described. URL: https://github.com/apache/incubator-airflow/pull/4156 Currently, the automatic inlets feature is described to be able to skip operations that produce no outlets. This changes the behaviour of the auto inlets feature in order so that the presence of non outlet producing operations are effectively ignored while still receiving all outlets from upstream tasks. Make sure you have checked _all_ steps below. ### Jira - [ ] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-XXX - In case you are fixing a typo in the documentation you can prepend your commit with \[AIRFLOW-XXX\], code changes always need a Jira issue. ### Description - [ ] Here are some details about my PR, including screenshots of any UI changes: Uses a tree search algorithm in order to find upstream outlets to be used as inlets. Provides expected behaviour as described in the previous documentation to receive outlets. @bolkedebruin, do you have any input on these changes? ### Tests - [ ] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason: Adds unit tests to tests/lineage/test_lineage.py ### Commits - [ ] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [ ] In case of new functionality, my PR adds documentation that describes how to use it. - When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added. ### Code Quality - [ ] Passes `flake8` Sorry if I'm breaking any guidelines, this is my first OSS pull request.
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