nuxt-route-meta/dist/parse-babel.js

Adds Nuxt page data to route meta at build time. Also supports TypeScript.

import * as babel from '@babel/core';
import traverse from '@babel/traverse';
import astToLiteral from 'ast-to-literal';
import deepmerge from 'deepmerge';
import { keys, omit } from 'lodash-es';
import predefinedProperties from "./predefined-properties.js";
export default ((script, context = {}) => {
  const ast = babel.parseSync(script.content, {
    filename: context.filename
  });
  let data = {};
  if (script.setup) {
    traverse.default(ast, {
      CallExpression: path => {
        if (path.node.callee.name === 'definePageMeta') {
          data = astToLiteral(path.node.arguments[0]);
        }
      }
    });
  } else {
    traverse.default(ast, {
      ClassDeclaration: path => {
        if (path.node.superClass.name === 'Vue') {
          data = Object.fromEntries(path.node.body.body.map(property => [property.key.name, astToLiteral(property.value)]));
        }
      },
      ExportDefaultDeclaration: path => {
        const object = path.node.declaration.type === 'CallExpression' && (path.node.declaration.callee.name === 'defineComponent' || path.node.declaration.callee.object?.name === 'Vue' && path.node.declaration.callee.property?.name === 'extend') ? path.node.declaration.arguments[0] : path.node.declaration;
        data = astToLiteral(object);
      }
    });
    data = deepmerge(omit(data, ['meta', ...keys(predefinedProperties)]), data?.meta || {});
  }
  return data;
});