Node script to find any JS files that are not imported anywhere else.

check_deps.js

const fs = require('fs');
const path = require('path');
const childProcess = require('child_process');

const directoryToSearch = process.argv[2];

function getAllFilesInDirectory(dirOrFile) {
  if (fs.statSync(dirOrFile).isDirectory()) {
    return Array.prototype.concat(...fs.readdirSync(dirOrFile).map((f) => getAllFilesInDirectory(path.join(dirOrFile, f))));
  } else if (dirOrFile.indexOf('.js') !== -1) {
    return dirOrFile;
  }
}

function cleanFileNames(fileNames) {
  return fileNames
    .filter((fileName) => !!fileName)
    .map((fileName) => fileName.replace('.js', ''));
}

function getFilesWithNoReferences(fileNames) {
  return fileNames.filter((fileName) => {
    try {
      childProcess.execSync(`grep -rwl "${fileName}" ${directoryToSearch}`);
      return false;
    } catch (e) {
      return true;
    }
  });
}

function run() {
  const allFileNames = getAllFilesInDirectory(directoryToSearch);
  const cleanedFileNames = cleanFileNames(allFileNames);

  return getFilesWithNoReferences(cleanedFileNames);
}

console.log(run());

// USAGE:
// execute from directory in which you want to search
// $ node <PATH_TO>/check_deps.js <DIRECTORY_TO_SEARCH>