extract_magic_image.js

const babylon = require('babylon');
const traverse = require('babel-traverse').default;
const generate = require('babel-generator').default;
const fs = require('fs');

var inputs = process.argv.slice(2);

var opts = {
  allowImportExportEverywhere: true,
  sourceType: 'module',
  plugins: [
    'jsx',
    'flow',
    'asyncFunctions',
    'classConstructorCall',
    'doExpressions',
    'trailingFunctionCommas',
    'objectRestSpread',
    'decorators',
    'classProperties',
    'exportExtensions',
    'exponentiationOperator',
    'asyncGenerators',
    'functionBind',
    'functionSent'
  ]
};

inputs.forEach(function (input) {
  var ast = babylon.parse(fs.readFileSync(input, 'utf8'), opts);

  traverse(ast, {
    JSXOpeningElement(path) {
      if (path.node.name.name === 'MagicImage') {
        var options = path.node.attributes.find(
          attr => attr.name.name === 'options');
        console.log(generate(options.value.expression, { quotes: 'double' }));
      }
    }
  });
});