Jinja2 Tag Support

[bmoe872]

What this does

Addresses: #265
By adding in some Jinja2 Tag Support!

I tried to keep this as consistent with how I've seen it done elsewhere, for instance looking at how wagtail handles Jinja2 tag support for their project.

There is a bit of setup, and I have yet to write tests.

Setup

To use these tags instead of the template tags, first you'll need to follow Jinja2 setup guides for Django templating, and wagtail templating. Namely my settings.py file looks like this in the end with all the important bits:

...
TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.jinja2.Jinja2',
        'APP_DIRS': True,
        'DIRS': [
            os.path.join(DJANGO_ROOT, 'jinja2'),
        ],
        'OPTIONS': {
            'environment': '<YourProjectNameHere>.jinja2.environment',
            'extensions': [
                'wagtail.core.jinja2tags.core',
                'wagtail.admin.jinja2tags.userbar',
                'wagtail.images.jinja2tags.images',
                'longclaw.core.jinja2tags.core',
                'longclaw.basket.jinja2tags.basket',
                'longclaw.checkout.jinja2tags.checkout',
            ]
        },
    },
    # Django Template Settings
    # If you have default template tag support
    ...
]

I've got this working on a personal project, but have not run it through the longclaw test suite yet.

What still needs to be done

• Tests should probably be written for some of this, even though it extends from the templatetags already written
• Testing on the longclaw test suite

[codecov]

Codecov Report

Merging #268 into master will decrease coverage by 2.58%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #268      +/-   ##
==========================================
- Coverage   86.74%   84.16%   -2.59%     
==========================================
  Files          61       64       +3     
  Lines        1366     1408      +42     
  Branches       62       62              
==========================================
  Hits         1185     1185              
- Misses        150      192      +42     
  Partials       31       31

Impacted Files	Coverage Δ
longclaw/basket/jinja2tags.py	0% <0%> (ø)
longclaw/checkout/jinja2tags.py	0% <0%> (ø)
longclaw/core/jinja2tags.py	0% <0%> (ø)

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