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Supply layout template for other languages (Rails, Python...)

See original GitHub issue

When implementing the Design System in a Rails app, I am able to include the assets (CSS, JS, fonts, images) easily enough, but the only layout file supplied is template.njk so I have to manually create views/layouts/application.slim myself, and then it will degrade over time and need to be recreated when the system is updated.

It would be ace to have a slim or perhaps just erb version of the template for Rails apps.

Issue Analytics

State:
Created 5 years ago
Comments:7 (6 by maintainers)

Top GitHub Comments

1reaction

andymantellcommented, Sep 5, 2018

Hi @leonk,

The script I’ve pasted is fully working so in terms of viability I think it’s a goer. I’m happy that the templates are working correctly, barring any edge case bugs.

I did look meta-template briefly but the readme file suggested it was quite early days so I didn’t pursue it. I proceeded on the assumption that Jinja and Nunjucks were similar enough that a few string replacements would do the trick (true => True, quoting object/dict keys etc). The reality turned out to be a little more painful than I realised, but what I’ve done still mostly amounts to relatively simple string manipulation. The regular expressions got a bit gnarly, but conceptually the transformations weren’t complicated. A lot of the differences (particularly the more annoying ones) were the result of the behaviours of the underlying language. And one that was probably either a bug in Jinja or a bug in Nunjucks, because the GOV.UK Nunjucks implementation just did not work whatever I did (The bit where each component macro simply includes an include, and expects the params to still be there)

Given that Twig is inspired by Jinja (And actually written by the same guy) you might well get away with a similar process. Basically I kept adding lines to my script until Python stopped throwing errors.

Give it a go 😃

1reaction

hannalaaksocommented, Aug 24, 2018

This decision record is also useful context here as it details what was done in alpha and some of the challenges we’ve identified: https://github.com/alphagov/govuk-design-system-architecture/blob/master/decision-records/003-templating-languages.md

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