index.js

const fs = require('fs').promises

const moduleFolders = ['defs', 'lib', 'rpc', 'storage', 'storage_consts']

const findOffenders = async fileArray => {
  const offenders = []
  for (let index = 0; index < fileArray.length; index++) {
    const file = fileArray[index]
    const data = (await fs.readFile(file)).toString()
    if (data[0]!=='/'){
      offenders.push(file)
    }
  }
  return offenders
}

const getFileArray = () => {
  return new Promise(async (succ, err) => {
    const files = []
    const folders = await fs.readdir('lib')
    for (let index = 0; index < folders.length; index++) {
      const folder = folders[index];
      for (let index = 0; index < moduleFolders.length; index++) {
        const modFolder = moduleFolders[index];
        try{
          const exists = await fs.stat('lib/'+folder + '/' + modFolder)
          if(exists){
            files.push('lib/'+folder + '/' + modFolder + '/src/lib.rs')
          }
        }catch(e){}
      }

    }
    succ(files)
  })
}

const asyncMain = async () => {
  const files = await getFileArray()
  const offenders = await findOffenders(files)
  console.log('offenders:')
  offenders.forEach(off=>{
    console.log(off)
  })
}

asyncMain()