fail backfill command before loading DAGs if missing args #18994
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I was looking through some of the CLI code last week trying to improve the speed of
airflow user
commands and I noticed this small issue.If neither the
start_date
orend_date
argument is provided then the command will fail, but it will first parse all of the DAGs which can take up to several minutes in large deployments.Now the command will fail faster, allowing the user to adjust their command and retry.