discourse/script/test_hbs_compiler.rb

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template = <<~HBS
{{attach widget="widget-name" attrs=attrs}}
{{a}}
{{{htmlValue}}}
{{#if state.category}}
{{attach widget="category-display" attrs=(hash category=state.category someNumber=123 someString="wat")}}
{{/if}}
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{{#each transformed.something as |s|}}
{{s.wat}}
{{/each}}
{{attach widget=settings.widgetName}}
{{#unless settings.hello}}
XYZ
{{/unless}}
HBS
ctx = MiniRacer::Context.new(timeout: 15000)
ctx.eval("var self = this; #{File.read("#{Rails.root}/vendor/assets/javascripts/babel.js")}")
ctx.eval(File.read(Ember::Source.bundled_path_for('ember-template-compiler.js')))
ctx.eval("module = {}; exports = {};")
ctx.attach("rails.logger.info", proc { |err| puts(err.to_s) })
ctx.attach("rails.logger.error", proc { |err| puts(err.to_s) })
ctx.eval <<JS
console = {
prefix: "",
log: function(msg){ rails.logger.info(console.prefix + msg); },
error: function(msg){ rails.logger.error(console.prefix + msg); }
}
JS
source = File.read("#{Rails.root}/lib/javascripts/widget-hbs-compiler.js.es6")
ctx.eval(source)
js_source = ::JSON.generate(template, quirks_mode: true)
puts ctx.eval("exports.compile(#{js_source})")