Add native support for ansible filters

Author: David Arnold

README.md

@@ -27,6 +27,18 @@ To enable the YAML support with [pyyaml](http://pyyaml.org/):
 pip install j2cli[yaml]
 ```
 
+To enable [ansible filters](https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#filters):
+
+```
+pip install j2cli[ansible]
+```
+
+Or both with
+
+```
+pip install j2cli[all]
+```
+
 ## Tutorial
 
 Suppose, you want to have an nginx configuration file template, `nginx.j2`:

j2cli/cli.py

@@ -186,6 +186,20 @@ def render_command(cwd, environ, stdin, argv):
     renderer = Jinja2TemplateRenderer(cwd, args.undefined, j2_env_params=customize.j2_environment_params())
     customize.j2_environment(renderer._env)
 
+    # Ansible filters - if available
+    try:
+        from ansible.plugins.filters import core as ansible_core_filters
+        from ansible.plugins.filters import urls as ansible_urls_filters
+        from ansible.plugins.filters import urlsplit as ansible_urlslict_filters
+        from ansible.plugins.filters import mathstuff as ansible_mathstuff_filters
+
+        renderer.register_filters(ansible_core_filters.FilterModule().filters())
+        renderer.register_filters(ansible_urls_filters.FilterModule().filters())
+        renderer.register_filters(ansible_urlsplit_filters.FilterModule().filters())
+        renderer.register_filters(ansible_mathstuff_filters.FilterModule().filters())
+    except ImportError:
+        pass
+
     # Filters, Tests
     renderer.register_filters({
         'docker_link': filters.docker_link,

setup.py

@@ -49,7 +49,9 @@
         'jinja2 >= 2.7.2',
     ],
     extras_require={
-        'yaml': [pyyaml_version,]
+        'yaml': [pyyaml_version,],
+        'ansible': ['ansible >= 2.9.10',],
+        'all': [pyyaml_version, 'ansible >= 2.9.10',],
     },
     include_package_data=True,
     zip_safe=False,