Fix jinja2.exceptions.TemplateSyntaxError

The filter loader is not working for meta.find_undeclared_variables and
templates using custom filters will error. Fall back to basic file
string matching when this happens.

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 Change log for the little-timmy python module.
 
+## [1.1.2] - 2024/10/13
+
+- Fix `jinja2.exceptions.TemplateSyntaxError` when loading templates with custom filters by failing back to basic searching.
+- Add `-v` version output.
+
 ## [1.1.1] - 2024/10/05
 
 - Fix erroneous new line in `-g` output.

github_action/Dockerfile

@@ -11,7 +11,7 @@ LABEL com.github.actions.name="little-timmy-action" \
     org.opencontainers.image.vendor="@hoo29" \
     org.opencontainers.image.description="GHA for Little Timmy, an unused Ansible variable finder."
 
-RUN pip3 install little-timmy==1.1.1
+RUN pip3 install little-timmy==1.1.2
 
 COPY entrypoint.sh /entrypoint.sh
 

little_timmy/var_finder.py

@@ -10,7 +10,7 @@
 from ansible.template import JinjaPluginIntercept
 from dataclasses import dataclass
 from glob import iglob
-from jinja2 import Environment, meta
+from jinja2 import Environment, exceptions, meta
 from typing import Any
 
 from .config_loader import Config
@@ -227,7 +227,11 @@ def find_unused_vars(directory: str, config: Config) -> dict[str, set[str]]:
     for path in get_files_in_folder(directory, "**/templates", config, include_ext=True):
         LOGGER.debug(f"template file {path}")
         with open(path, "r") as f:
-            parse_jinja(f.read(), all_referenced_vars, path)
+            contents = f.read()
+            try:
+                parse_jinja(contents, all_referenced_vars, path)
+            except exceptions.TemplateSyntaxError:
+                check_raw_file_for_variables(contents, path, context)
 
     # playbooks
     for path in get_files_in_folder(directory, ".", config, f"*playbook*{YAML_FILE_EXTENSION_GLOB}"):

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "little-timmy"
-version = "1.1.1"
+version = "1.1.2"
 description = "Little Timmy will try their best to find those unused Ansible variables."
 readme = "README.md"
 authors = [{ name = "Huw" }]