Audit the number of `any` keywords and `@ts-expect-error` directives

audit.ts

import * as fs from 'fs';
import * as glob from 'glob';
import { parse } from '@babel/parser';
import traverse from '@babel/traverse';

export const isExpectErrorComment = (comment: string): boolean =>
  comment.trim().startsWith('@ts-expect-error TS(');

let totalAnyKeywords = 0;
let totalExpectErrorDirectives = 0;

const processFileContents = (contents: string) => {
  // Convert the file contents into an abstract syntax tree.
  const ast = parse(contents, {
    sourceType: 'module',
    plugins: ['jsx', 'typescript'],
  });

  // Traverse the abstract syntax tree to find any 
  // instances of the `any` keyword.
  traverse(ast, {
    TSAnyKeyword() {
      totalAnyKeywords += 1;
    },
  });

  // The comments are already nicely parsed out.
  ast.comments?.forEach((comment) => {
    // Determine if the comment is a special comment 
    // that expects an error. Ignore it if not.
    if (isExpectErrorComment(comment.value)) {
      totalExpectErrorDirectives += 1;
    }
  });
};

// Find all the relevant file to audit.
const files = glob.sync('src/**/*.@(tsx|ts)');

files.forEach((file) => {
  const contents = fs.readFileSync(file).toString();
  processFileContents(contents);
});

console.log({ totalAnyKeywords, totalExpectErrorDirectives });