parse.js

import fs from "fs";
import { uniq } from "lodash";
import { parse } from "@babel/parser";
import traverse from "@babel/traverse";

const getRelevantFiles = (filename, relevantFiles = []) => {
  if (relevantFiles.includes(filename)) return relevantFiles;
  const ast = parse(fs.readFileSync(filename, "utf-8"));
  traverse(ast, {
    ImportDeclarations(path) {
      const filename = getDependencyFilenameFromNode(path.node);
      relevantFiles.push(filename);
      const relevantFilesToDependency = getRelevantFiles(
        filename,
        relevantFiles
      );
      relevantFiles.push(...relevantFilesToDependency);
    }
  });
  return uniq(relevantFiles);
};