19 lines
		
	
	
		
			361 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			19 lines
		
	
	
		
			361 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
const visit = require('unist-util-visit');
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const YAML = require('js-yaml');
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function plugin() {
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  return transformer;
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  function transformer(tree, file) {
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    visit(tree, 'yaml', visitor);
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    function visitor(node) {
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      const frontmatter = YAML.load(node.value);
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      file.data = { ...file.data, ...frontmatter };
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    }
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  }
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}
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module.exports = plugin;
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