From 40e6290e62347063bd9be9db36e84186cad75ddf Mon Sep 17 00:00:00 2001
From: Jarek Potiuk <jarek@potiuk.com>
Date: Thu, 16 Apr 2026 21:14:50 +0200
Subject: [PATCH] Scope backport-to-v3-2-test label to PRs targeting main
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Uses the per-rule `targetBranchFilter` option added in
kaxil/boring-cyborg#112 so the backport label is not applied to PRs
opened directly against the v3-2-test maintenance branch — where a
backport label is meaningless.

Also teaches the `check-boring-cyborg-configuration` prek hook about
the new `{paths, targetBranchFilter}` object form for label rules.
---
 .github/boring-cyborg.yml        | 25 +++++++++++++++----------
 scripts/ci/prek/boring_cyborg.py | 10 ++++++++--
 2 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/.github/boring-cyborg.yml b/.github/boring-cyborg.yml
index 2888b199edc7c..0916d328ea8ae 100644
--- a/.github/boring-cyborg.yml
+++ b/.github/boring-cyborg.yml
@@ -348,17 +348,22 @@ labelPRBasedOnFilePath:
     - .readthedocs.yml
 
   # This should be copy of the "area:dev-tools" above minus contributing docs and some files that should
-  # only make sense in main - it should be updated when we switch maintenance branch
+  # only make sense in main - it should be updated when we switch maintenance branch.
+  # Scoped to PRs targeting `main` only — a PR opened directly against v3-2-test
+  # does not need a backport-to-v3-2-test label.
   backport-to-v3-2-test:
-    - scripts/**/*
-    - dev/**/*
-    - .github/**/*
-    - Dockerfile.ci
-    - yamllint-config.yml
-    - .dockerignore
-    - .hadolint.yaml
-    - .pre-commit-config.yaml
-    - .rat-excludes
+    paths:
+      - scripts/**/*
+      - dev/**/*
+      - .github/**/*
+      - Dockerfile.ci
+      - yamllint-config.yml
+      - .dockerignore
+      - .hadolint.yaml
+      - .pre-commit-config.yaml
+      - .rat-excludes
+    targetBranchFilter:
+      - ^main$
 
   kind:documentation:
     - airflow-core/docs/**/*
diff --git a/scripts/ci/prek/boring_cyborg.py b/scripts/ci/prek/boring_cyborg.py
index 4db81cc0d5c01..5e9ef359ffb7c 100755
--- a/scripts/ci/prek/boring_cyborg.py
+++ b/scripts/ci/prek/boring_cyborg.py
@@ -46,8 +46,14 @@
     raise SystemExit(f"Missing section {CONFIG_KEY}")
 
 errors = []
-# Check if all patterns in the cyborg config are existing in the repository
-for label, patterns in cyborg_config[CONFIG_KEY].items():
+# Each label rule is either a list of glob patterns (legacy form) or an object
+# with `paths` and an optional `targetBranchFilter` (see kaxil/boring-cyborg#112).
+# Only the glob patterns in `paths` need to exist in the repository.
+for label, rule in cyborg_config[CONFIG_KEY].items():
+    if isinstance(rule, dict):
+        patterns = rule.get("paths", [])
+    else:
+        patterns = rule
     for pattern in patterns:
         try:
             next(Path(AIRFLOW_ROOT_PATH).glob(pattern))