using Liquid variables inside of a liquid tag call

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I’ve recently solved this very simply with Jekyll 0.11.2 and Liquid 2.3.0 by passing the name of the variable as the tag parameter.

{% assign v = 'art' %}
{% link_to_article v %}

You can also pass the name of the control var while in a loop, like article above.

In Liquid::Tag.initialize, @markup is the second parameter, the string following the tag name. The assigned variables are available in the top level of the context.

def render(context)
  "/#{context[@markup.strip]}/"
end

This obviously only allows one param to be passed. A more complex solution would parse params like x: 2, y: 3.

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