Generate SLS context for non-SLS templates

Rather than logging a warning, just populate some of the context
variables with appropriate values.

salt/utils/templates.py

@@ -120,8 +120,16 @@ def generate_sls_context(tmplpath, sls):
         elif template.endswith(f"{slspath}/init.sls"):
             template = template[-(9 + len(slspath)) :]
         else:
-            # Something went wrong
-            log.warning("Failed to determine proper template path")
+            # It is not an SLS file being processed,
+            template = sls
+            sls_context.update(
+                dict(
+                    tplpath=tmplpath,
+                    tplfile=template,
+                    tpldir=str(pathlib.Path(sls).parents[0]),
+                )
+            )
+            return sls_context
 
         slspath = template.rsplit("/", 1)[0] if "/" in template else ""
 

tests/pytests/unit/utils/templates/test_wrap_tmpl_func.py

@@ -30,7 +30,9 @@ def _test_generated_sls_context(tmplpath, sls, **expected):
         tmplpath = f"C:{tmplpath}"
     expected["tplpath"] = tmplpath
     actual = generate_sls_context(tmplpath, sls)
-    assert {key: actual[key] for key in expected if key in actual} == actual
+    for key, value in expected.items():
+        assert key in actual
+        assert actual[key] == expected[key]
 
 
 def test_sls_context_call(tmp_path):
@@ -216,3 +218,45 @@ def test_generate_sls_context__backslash_in_path():
         sls_path="foo",
         slspath="foo",
     )
+
+
+def test_generate_sls_context__non_sls_root():
+    """generate_sls_context - Non-SLS template in the root directory
+
+    (Issue #56410)
+    """
+    _test_generated_sls_context(
+        "jinja.yaml",
+        "jinja.yaml",
+        tplpath="jinja.yaml",
+        tplfile="jinja.yaml",
+        tpldir=".",
+    )
+
+
+def test_generate_sls_context__non_sls_one_level():
+    """generate_sls_context - Non-SLS template with one-level directory
+
+    (Issue #56410)
+    """
+    _test_generated_sls_context(
+        "one/jinja.yaml",
+        "one/jinja.yaml",
+        tplpath="one/jinja.yaml",
+        tplfile="one/jinja.yaml",
+        tpldir="one",
+    )
+
+
+def test_generate_sls_context__non_sls_two_level():
+    """generate_sls_context - Non-SLS template with two-level directory
+
+    (Issue #56410)
+    """
+    _test_generated_sls_context(
+        "one/two/jinja.yaml",
+        "one/two/jinja.yaml",
+        tplpath="one/two/jinja.yaml",
+        tplfile="one/two/jinja.yaml",
+        tpldir="one/two",
+    )