module: simplify findPackageJSON implementation

PR-URL: #55543 Reviewed-By: Jacob Smith <jacob@frende.me> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>

Author: aduh95

lib/internal/modules/package_json_reader.js

@@ -7,7 +7,6 @@ const {
  RegExpPrototypeExec,
  StringPrototypeIndexOf,
  StringPrototypeSlice,
- StringPrototypeStartsWith,
 } = primordials;
 const {
  fileURLToPath,
@@ -285,22 +284,14 @@ function findPackageJSON(specifier, base = 'data:') {
  validateString(specifier, 'specifier');
  }
 
- let parentURL;
- if (isURL(base)) {
- parentURL = new URL(base);
- } else {
+ let parentURL = base;
+ if (!isURL(base)) {
  validateString(base, 'base');
- if (
- path.isAbsolute(base) ||
- (URLCanParse(base) && !StringPrototypeStartsWith(base, 'file:'))
- ) {
- parentURL = pathToFileURL(path.toNamespacedPath(base));
- } else {
- parentURL = URL.parse(base) || pathToFileURL(base);
- }
+ parentURL = path.isAbsolute(base) ? pathToFileURL(base) : new URL(base);
  }
 
  if (specifier && specifier[0] !== '.' && specifier[0] !== '/' && !URLCanParse(specifier)) {
+ // If `specifier` is a bare specifier.
  const { packageJSONPath } = getPackageJSONURL(specifier, parentURL);
  return packageJSONPath;
  }