Function parsePackageName

lib/internal/modules/package_map.js:203–223

* Parse a package specifier into name and subpath. * @param {string} specifier * @returns {{packageName: string, subpath: string}}

(specifier)

 * @returns {{packageName: string, subpath: string}}
 */
function parsePackageName(specifier) {
  const isScoped = specifier[0] === '@';
  let slashIndex = StringPrototypeIndexOf(specifier, '/');

  if (isScoped) {
    if (slashIndex === -1) {
      // Invalid: @scope without package name, treat whole thing as name
      return { packageName: specifier, subpath: '.' };
    }
    slashIndex = StringPrototypeIndexOf(specifier, '/', slashIndex + 1);
  }

  if (slashIndex === -1) {
    return { packageName: specifier, subpath: '.' };
  }

  return {
    packageName: StringPrototypeSlice(specifier, 0, slashIndex),
    subpath: '.' + StringPrototypeSlice(specifier, slashIndex),
  };
}

/**
 * Load and parse the package map from a config path.