find-unused-components.js

const { spawnSync } = require('child_process');

// const packageJSON = require('./package.json');

// const modules = { ...packageJSON.dependencies, ...packageJSON.devDependencies };

// const allModuleNames = Object.keys(modules);

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

function fileList(dir) {
  return fs.readdirSync(dir).reduce(function (list, file) {
    var name = path.join(dir, file);
    var isDir = fs.statSync(name).isDirectory();
    return list.concat(isDir ? fileList(name) : [name]);
  }, []);
}

// PROVIDE FILE PATH
const result = fileList('./ui/')
  .filter((name) => name.match(/tsx|ts|js/) && !name.match(/\.next|-|_|index|pages/))
  .filter((name) => {
    const nameParts = name.split('/');
    const lastPart = nameParts[nameParts.length - 1];
    return lastPart.toLowerCase() !== lastPart;
  })
  .map((name) => {
    const nameParts = name.split('/');
    const lastPart = nameParts[nameParts.length - 1];
    const nameOnly = lastPart.split('.')[0];
    return nameOnly;
  });

const unusedModuleNames = [];

for (const moduleName of result) {
  const numTimesUsed = spawnSync(
    'sh',
    [
      '-c',
      `grep -R --exclude-dir={node_modules,flow-typed,build,coverage,.expo,.next} --exclude={yarn.lock,package.json,test.js} "${moduleName}';" . | wc -l`,
    ],
    { encoding: 'utf8' }
  ).stdout.trim();
  console.log(moduleName, numTimesUsed);
  if (parseInt(numTimesUsed, 10) === 0) {
    unusedModuleNames.push(moduleName);
  }
}
console.log('POSSIBLY UNUSED MODULES:');
unusedModuleNames.forEach((moduleName) => console.log(moduleName));