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https://issues.apache.org/jira/browse/AIRFLOW-3620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16753374#comment-16753374
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jack commented on AIRFLOW-3620:
-------------------------------
The docs has example using the BashOperator
[https://airflow.apache.org/lineage.html]
Can you post your code so it's possible to trace the issue?
> Inlets and outlets are always empty in bash operator templates
> --------------------------------------------------------------
>
> Key: AIRFLOW-3620
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3620
> Project: Apache Airflow
> Issue Type: Bug
> Affects Versions: 1.10.1
> Reporter: Adam C Baker
> Priority: Major
>
> When creating a data pipeline where one task's input is its upstream task's
> output, it seems the only way to automatically coordinate these is to use the
> lineage feature and set {{inlets = \{"auto": True}}}. Doing this with a
> PythonOperator allows one to get the input and output data sources for the
> task by passing in the context and getting {{task.inlets}} and
> {{task.outlets}} values.
> This fails with the BashOperator. With a template including something like
> {{{{task.inlets[0]}}}}, it throws an exception, and templating with
> {{{{task.inlets}}}} or {{{{task.outlets}}}} always reveals these values to be
> an empty list.
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