Avoid checking var-names on non ansible files (#2856)

.config/dictionary.txt

@@ -26,6 +26,7 @@ Sorin
 Sshell
 TOXENV
 TYPECHECK
+Taskfiles
 Tsukinowa
 Tóth
 WSLENV
@@ -306,6 +307,7 @@ subtest
 supervisorctl
 synchronize
 sysvinit
+taskfile
 taskhandler
 taskimports
 taskincludes

.github/workflows/tox.yml

@@ -69,7 +69,7 @@ jobs:
       WSLENV: FORCE_COLOR:PYTEST_REQPASS:TOXENV:GITHUB_STEP_SUMMARY
       # Number of expected test passes, safety measure for accidental skip of
       # tests. Update value if you add/remove tests.
-      PYTEST_REQPASS: 742
+      PYTEST_REQPASS: 743
 
     steps:
       - name: Activate WSL1

examples/Taskfile.yml

@@ -0,0 +1,8 @@
+---
+# Sample taskfile, for testing linter ability to identify it
+version: "3"
+output: group
+vars:
+  HOSTNAME: # <-- this is valid for Taskfiles but not for ansible files
+    sh: echo ${HOSTNAME:-localhost}
+tasks: {}

src/ansiblelint/rules/var_naming.py

@@ -11,7 +11,8 @@
 from ansiblelint.config import options
 from ansiblelint.constants import LINE_NUMBER_KEY, SUCCESS_RC
 from ansiblelint.file_utils import Lintable
-from ansiblelint.rules import AnsibleLintRule
+from ansiblelint.rules import AnsibleLintRule, RulesCollection
+from ansiblelint.runner import Runner
 from ansiblelint.skip_utils import get_rule_skips_from_line
 from ansiblelint.utils import parse_yaml_from_file
 
@@ -74,7 +75,7 @@ def matchplay(self, file: Lintable, data: dict[str, Any]) -> list[MatchError]:
         results: list[MatchError] = []
         raw_results: list[MatchError] = []
 
-        if not data:
+        if not data or file.kind not in ("tasks", "handlers", "playbook", "vars"):
             return results
         # If the Play uses the 'vars' section to set variables
         our_vars = data.get("vars", {})
@@ -193,12 +194,19 @@ def matchyaml(self, file: Lintable) -> list[MatchError]:
     )
 
     @pytest.mark.parametrize(
-        "rule_runner", (VariableNamingRule,), indirect=["rule_runner"]
+        ("file", "expected"),
+        (
+            pytest.param("examples/playbooks/rule-var-naming-fail.yml", 7, id="0"),
+            pytest.param("examples/Taskfile.yml", 0, id="1"),
+        ),
     )
-    def test_invalid_var_name_playbook(rule_runner: RunFromText) -> None:
+    def test_invalid_var_name_playbook(file: str, expected: int) -> None:
         """Test rule matches."""
-        results = rule_runner.run("examples/playbooks/rule-var-naming-fail.yml")
-        assert len(results) == 7
+        rules = RulesCollection(options=options)
+        rules.register(VariableNamingRule())
+        results = Runner(Lintable(file), rules=rules).run()
+        # results = rule_runner.run()
+        assert len(results) == expected
         for result in results:
             assert result.rule.id == VariableNamingRule.id
         # We are not checking line numbers because they can vary between