Prettier formatting of Liquid markup

[charlespwd]

A TODO that we're solving post dev-preview, since I would like to open a discussion about the rules.

Problem

The insides of LiquidDrop and LiquidTag are not formatted yet:

Input:

{%render 'foo',arg1:product,arg2:product%}

Expected Output:

{% # with printWidth: 80 %}
{% render 'foo', arg1:product, arg2:product %}

{% # with printWidth: 1, not sure yet if we indent args or not. Might be good GitHub discussion. %}
{% 
  render 'foo', 
  arg1: product, 
  arg2: product 
%}

Temporary fix

Don't format at all other than adding leading/trailing whitespace to the tag.

{% render 'foo',arg1:product,arg2:product %}

TODO

This is going to be a big change. Better to split it into smaller chunks.

• Prettier Liquid: Fallback behaviour (passthrough)
• Prettier Liquid: VariableLookup in drops #40
• Prettier Liquid: Filters #45
• Prettier Liquid: assign + echo #50
• Prettier Liquid: render + include #55
• Prettier Liquid: Simple behaviour (positional args + named args) #24
• Prettier Liquid: tags without arguments #58
• Prettier Liquid: section #59
• Prettier Liquid: form #60
• Prettier Liquid: paginate #61
• Prettier Liquid: if, unless, elsif, else #62
• Prettier Liquid: case, when #63
• Prettier Liquid: for, tablerow #64
• Prettier Liquid: layout, #65
• Prettier Liquid: capture, #67
• Prettier Liquid: cycle, #68
• Prettier Liquid: increment, decrement #69
• Prettier Liquid: raw, capture body #66