potiuk opened a new pull request, #37057:
URL: https://github.com/apache/airflow/pull/37057
In our process, we generally do not let the scripts in the "build images"
workflow to use `scripts/ci`, `dev` and `action` scripts to come from the PR.
This is a security feature that prevent Pull Requests from forks to run code on
a worker that can potentially access sensitive information - such as
GITHUB_TOKEN with write access to Github Registry.
This, however, causes troubles, because in order to test any changes in
those scripts affecting building image, you have to close your PR from the fork
and push one directly to Apache repository (there in-line build workflows are
used from "Test" workflow and those PRs are safe to run, because only
committers can push directly to the `apache/airflow` repository branches.
This PR changes default behaviour for committer PRs. Rather than do the same
as "regular" PRs, those PRs will not use scripts from the target branch,
instead they will use scripts from the incoming PRs of the committers. This is
equally safe as running PRs from the `apache/airflow` branch - because we have
a reviewed list of committers in our code and "selective checks" job that
checks it is run always in the context and with the code of the "target"
branch, which means that you cannot manipulate the list of actors.
The Girhub actor is retrieved from pull requests github context
(event/pull_request/user/login) so it is impossible to spoof it by the incoming
PR.
As part of this PR - list of available selective checks and documentation of
PR labels and selective checks (wrongly named as "static checks") were reviewed
and updated.
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