Tidy for Jinja2 templates

Question

Is there a tidy-like tool or a tidy configuration, which works fine with Jinja2 templates? The default tidy has problems with Jinja code in attributes and Jinja-loops are formated in an unreadable way. My main requirement is to get the indentation level right. Everything else is nice to have, but not required.

Answer 1

Standalone

A standalone (Jinja2 lint like) tool can be found here:

https://github.com/ramonsaraiva/jinjaninja

Install:

$ pip install jinjaninja

Usage:

$ jinja-ninja templates/header.html 

Output example:

templates/header.html:8:68 Block closures should also have names `{% endblock %}`

Check jinjaninja@github for more information

Pre-Commit

If as part of your local git setup you use pre-commit, check the

• pre-commit jinja hooks

Django Templates

If you use Django Templates, I suggest to use django-extensions and make use of: validate_templates

You can use pip to install django-extensions for usage:

 $ pip install django-extensions

Django project settings.py file.:

INSTALLED_APPS = [ ... 
     'django_extensions', 
]

The next time you invoke ./manage.py help you should be able to see all the newly available commands. One is called "validate_templates"

$ python manage.py validate_templates

Visual Code Extension

Visual Code offers two Jinja extensions, the default is "Jinja" but a newer one with more functionality is:

• Better Jinja

Answer 2

While it is not a standalone tool like HTML Tidy, the atom-beautify package for the Atom text editor works fine for me. I use atom-beautify when developing Flask/Jinja2 applications.