Shawnsuun opened a new pull request, #76133:
URL: https://github.com/apache/airflow/pull/76133
<!-- SPDX-License-Identifier: Apache-2.0
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`airflowctl dags pause|unpause|drain` printed `Dag <operation> successful
<dag_id>` and
`Further Dag details:` to stdout before the `--output` data, so
`airflowctl dags pause my_dag -o json | jq .` failed: stdout was not valid
JSON. The error
message on failure (`Error while trying to <operation> Dag ...`) also went
to stdout.
These status and error lines now go to stderr, the same way airflowctl
already reports the
"request may already have been applied" warning. Stdout carries only the
requested output
format. In a terminal, the visible output does not change. The status lines
still show for
every output format, but on stderr.
Tests: parametrized over pause/unpause/drain, they check that `-o json`
stdout parses as JSON
while the status lines are on stderr, and that the failure message is on
stderr and not on
stdout. The airflow-ctl-tests integration runner merges stderr into stdout,
so the
`dags pause/unpause/drain example_bash_operator` integration commands are
unaffected.
Note: on an API error, the client's generic `Server error` warning is still
logged through the
default structlog configuration, which writes to stdout. That affects every
command, not just
these three, and is left for a separate change.
related: #66139
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