Replace relative JS imports

replaceImports.js

var fs = require("fs");
var path = require("path");

const replaceImports = (pathToDir, replace) =>
  fs.readdir(pathToDir, function(err, files) {
    if (err) {
      console.error("Could not list the directory.", err);
      process.exit(1);
    }

    files.forEach(function(file, index) {
      var pathToFile = path.join(pathToDir, file);
      fs.stat(pathToFile, function(error, stat) {
        if (error) {
          console.error("Error stating file.", error);
          return;
        }

        if (stat.isFile()) {
          const newFileLines = fs
            .readFileSync(pathToFile)
            .toString()
            .split("\n")
            .map(function(line) {
              if (line.startsWith("import ")) {
                const importPath = line.match(/from ('|")(.*)('|")/);
                if (importPath && importPath[2]) {
                  return replace({
                    line,
                    importPath: importPath[2],
                    pathToFile,
                    pathToDir
                  });
                }
              }

              return line;
            });

          const newFileData = newFileLines.join("\n");

          fs.writeFileSync(pathToFile, newFileData);
        } else if (stat.isDirectory()) {
          replaceImports(pathToFile, replace);
        }
      });
    });
  });

const rootPath = "/Users/xxx/Projects/xxx/web/src";
replaceImports(rootPath, ({ line, importPath, pathToFile, pathToDir }) => {
  if (importPath.startsWith("../")) {
    const depthSymbolMatch = importPath.match(/\.\.\//g);
    if (depthSymbolMatch) {
      const depth = depthSymbolMatch.length;
      const pathToDirArr = pathToDir.split("/");
      const absolutePrefix = pathToDirArr
        .slice(0, pathToDirArr.length - depth)
        .join("/");
      const absolutePath =
        "src" +
        (absolutePrefix + "/" + importPath.replace(/\.\.\//g, "")).replace(
          rootPath,
          ""
        );

      return line.replace(importPath, absolutePath);
    }
  } else if (importPath.startsWith("./")) {
    const absolutePath =
      "src" +
      (pathToDir + "/" + importPath.replace(/\.\//g, "")).replace(rootPath, "");

    return line.replace(importPath, absolutePath);
  }

  return line;
});