Ensure we return error if argument gives are not present

Fixes: #3466

.github/workflows/tox.yml

@@ -59,7 +59,7 @@ 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: 798
+      PYTEST_REQPASS: 799
     steps:
       - name: Activate WSL1
         if: "contains(matrix.shell, 'wsl')"

src/ansiblelint/runner.py

@@ -188,6 +188,16 @@ def _run(self) -> list[MatchError]:  # noqa: C901
                     ),
                 )
                 lintable.stop_processing = True
+            # identify missing files/folders
+            if not lintable.path.exists():
+                matches.append(
+                    MatchError(
+                        lintable=lintable,
+                        message="File or found not found.",
+                        rule=LoadingFailureRule(),
+                        tag="load-failure[not-found]",
+                    ),
+                )
 
         # -- phase 1 : syntax check in parallel --
         def worker(lintable: Lintable) -> list[MatchError]:

test/test_runner.py

@@ -173,3 +173,20 @@ def test_files_not_scanned_twice(default_rules_collection: RulesCollection) -> N
     # this second run should return 0 because the included filed was already
     # processed and added to checked_files, which acts like a bypass list.
     assert len(run2) == 0
+
+
+def test_runner_not_found(default_rules_collection: RulesCollection) -> None:
+    """Ensure that lintables aren't double-checked."""
+    checked_files: set[Lintable] = set()
+
+    filename = Path("this/folder/does/not/exist").resolve()
+    runner = Runner(
+        filename,
+        rules=default_rules_collection,
+        verbosity=0,
+        checked_files=checked_files,
+    )
+    result = runner.run()
+    assert len(runner.checked_files) == 1
+    assert len(result) == 1
+    assert result[0].tag == "load-failure[not-found]"