Rust macro generator for protobuf messages

generator.js

const fs = require('fs');
const filepath = process.argv[2];
const filename = filepath.match(/([a-z_0-9]+)\.rs$/)[1];
const data = fs.readFileSync(filepath, 'utf8');
const structs = data
    .split('\n')
    .filter(line => /^pub struct /.test(line))
    .map(line => line.replace(/(pub struct | \{)/g, ''));
const tab = '    ';

// console.log(`${filename}::{`);
// console.log(tab + structs.join(`,\n${tab}`));
// console.log('}');
structs.forEach(struct => console.log(`gc_msg!(${filename}::${struct});`));