How does Airflow handle templating and macros?

Airflow supports Jinja2 templating inside operator parameters that are listed in template_fields. You can inject runtime values such as execution date, data interval, and custom macros.

Common built-in macros:

• {{ ds }} — execution date as YYYY-MM-DD.
• {{ ds_nodash }} — execution date without dashes.
• {{ data_interval_start }} / {{ data_interval_end }} — start/end of the data interval.
• {{ var.value.my_var }} — an Airflow Variable value.
• {{ conn.my_conn_id.host }} — a Connection attribute.

BashOperator(
    task_id='print_date',
    bash_command='echo Processing date: {{ ds }}'
)

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