jason810496 commented on code in PR #57741:
URL: https://github.com/apache/airflow/pull/57741#discussion_r2491087412


##########
airflow-core/src/airflow/cli/commands/dag_processor_command.py:
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@@ -52,6 +52,15 @@ def dag_processor(args):
     """Start Airflow Dag Processor Job."""
     job_runner = _create_dag_processor_job_runner(args)
 
+    if hasattr(args, "dev") and args.dev:

Review Comment:
   > Could you please also enable dev mode when DEV_MODE env variable is set? 
   
   NP! I just added `should_enable_hot_reload` utils to check CLI args and both 
`DEV_MODE` env.
   
   > We can also consider splitting that to a different parameter or making 
some kind of selective dev mode 
   
   Maybe the `--dev` flag at Breeze level should be provided with components 
name (`all, api-server, scheduler, etc`), then toggle the `--dev` flag for 
specified components? Or do we need different env variable name for each 
component? (e.g. `<NAME>_DEV_MODE`)
   
   I can refine detail on Breeze side in follow-up PR and this PR will only 
change the airflow-core side.



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