ENH: add pre-commit to Dependabot

.github/dependabot.yml

@@ -12,3 +12,8 @@ updates:
     labels: [⬆️ Lock]
     multi-ecosystem-group: lock
     patterns: ["*"]
+  - package-ecosystem: pre-commit
+    directory: "/"
+    labels: [⬆️ Lock]
+    multi-ecosystem-group: lock
+    patterns: ["*"]

src/compwa_policy/check_dev_files/dependabot.py

@@ -17,17 +17,17 @@
     from compwa_policy.check_dev_files.upgrade_lock import Frequency
 
 
-def main(frequency: Frequency) -> None:
+def main(frequency: Frequency) -> None:  # noqa: C901
     def dump_dependabot_config() -> None:
         dependabot_path.parent.mkdir(exist_ok=True)
         rt_yaml.dump(expected, dependabot_path)
         msg = f"Updated {dependabot_path}"
         raise PrecommitError(msg)
 
-    def append_ecosystem(ecosystem_name: str) -> None:
-        new_ecosystem = deepcopy(github_actions_ecosystem)  # avoid YAML anchors
+    def get_ecosystem(ecosystem_name: str, /) -> dict[str, Any]:
+        new_ecosystem = deepcopy(template_ecosystem)  # avoid YAML anchors
         new_ecosystem["package-ecosystem"] = ecosystem_name
-        package_ecosystems.append(new_ecosystem)
+        return new_ecosystem
 
     dependabot_path = CONFIG_PATH.github_workflow_dir.parent / "dependabot.yml"
     template_path = COMPWA_POLICY_DIR / dependabot_path
@@ -36,20 +36,23 @@ def append_ecosystem(ecosystem_name: str) -> None:
     expected = rt_yaml.load(template_path)
     if frequency is not None:
         expected["multi-ecosystem-groups"]["lock"]["schedule"]["interval"] = frequency
-    package_ecosystems = cast("list[dict[str, Any]]", expected["updates"])
-    github_actions_ecosystem = package_ecosystems[0]
-    if not is_committed(f"{CONFIG_PATH.github_workflow_dir / '*.yml'}"):
-        package_ecosystems.pop(0)
+    template_ecosystem = cast("dict[str, Any]", expected["updates"][0])
+    package_ecosystems: list[dict[str, Any]] = []
+    if is_committed(f"{CONFIG_PATH.github_workflow_dir / '*.yml'}"):
+        package_ecosystems.append(get_ecosystem("github-actions"))
     if is_committed("**/Manifest.toml"):
-        append_ecosystem("julia")
+        package_ecosystems.append(get_ecosystem("julia"))
+    if is_committed(".pre-commit-config.yaml"):
+        package_ecosystems.append(get_ecosystem("pre-commit"))
     if is_committed("uv.lock"):
-        append_ecosystem("uv")
+        package_ecosystems.append(get_ecosystem("uv"))
 
     if not package_ecosystems:
         dependabot_path.unlink(missing_ok=True)
         msg = f"Removed {dependabot_path}"
         raise PrecommitError(msg)
         return
+    expected["updates"] = package_ecosystems
     if not dependabot_path.exists():
         dump_dependabot_config()
     existing = rt_yaml.load(dependabot_path)

src/compwa_policy/check_dev_files/poe.py

@@ -146,7 +146,7 @@ def _set_jupyter_lab_task(pyproject: ModifiablePyproject) -> None:
     if isinstance(executor := existing.get("executor"), Mapping):
         expected["executor"] = executor
     elif "jupyter" in set(pyproject.get_table("dependency-groups", fallback=set())):
-        expected["executor"] = to_inline_table({"group": "jupyter"})
+        expected["executor"] = to_inline_table({"group": "jupyter"})  # ty:ignore[invalid-assignment]
     if existing != expected:
         tasks["lab"] = expected
         msg = f"Set Poe the Poet jupyter task in {CONFIG_PATH.pyproject}"
@@ -183,7 +183,7 @@ def _set_nb_task(pyproject: ModifiablePyproject) -> None:
         executor["with"] = existing_executor_with
     else:
         executor["with"] = "nbmake"
-    expected["executor"] = to_inline_table(executor)
+    expected["executor"] = to_inline_table(executor)  # ty:ignore[invalid-assignment]
     if existing != expected:
         tasks["nb"] = expected
         msg = f"Set Poe the Poet nb task in {CONFIG_PATH.pyproject}"

src/compwa_policy/check_dev_files/upgrade_lock.py

@@ -34,7 +34,7 @@
     "quarterly": "0 3 7 */3 *",
     "semiannually": "0 3 7 */6 *",
 }
-__TRIGGER_ECOSYSTEMS = {"julia", "uv"}
+__TRIGGER_ECOSYSTEMS = {"julia", "pre-commit", "uv"}
 
 
 def main(