[Stencil filters] Add lowercase_first filter to existing one or add option to add new custom one

Ideas
1

Hello there !

I’m really trying to make the most out of Tuist right now and while designing my template, I found that I really miss a specific filter which is lowercase_first that as you guess a filter that just lowercase the first letter to create a property name base out of the template name for example.
I saw in the Stencil project that it is possible to create custom filter but it doesn’t seems to be accessible from a Tuist user perspective.

Adding this seems to only consist of something like this:

import Stencil 

let ext = Extension()
// Register your filters and tags with the extension

let environment = Environment(extensions: [ext])

ext.registerFilter("lowercase_first") { (value: Any?) in
    guard let string = value as? String else { return value }
    return string.prefix(1).lowercased() + string.dropFirst()
}

Here is the documentation about it: Custom Template Tags and Filters — Stencil 0.15.1 documentation

What do you think ? Maybe I need to suggest this directly to the Stencil project ?

2

Hey @FredericRuaudel :wave:

There is currently no way to specify custom filters of Stencil templates, you’re right about that.

However, not only Stencil filters are available, but also the additional filters from StencilSwiftKit. You should be able to use the lowerFirstLetter filter.

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