Print AST to code in Babel 5.x

index.js

import generate from 'babel-core/lib/generation';

let file;

function print(ast) {
  // duck type NodePath
  if (ast.node) {
    ast = ast.node;
  }
  console.log(generate(ast, file.opts, file.code).code);
}

export default function ({ Plugin, types: t }) {
  return new Plugin('angular-annotate', {
    visitor: {
      Program: {
        enter(node, parent, scope, _file) {
          file = _file;
        }
      },
      MemberExpression() {
        print(this);
      }
    }
  });
}