Function getNpmPackageVariable

src/commandLine.ts:218–234

(packageJson: Record<string, unknown>, variableName: string)

}

function getNpmPackageVariable(packageJson: Record<string, unknown>, variableName: string): string | undefined {
  const prefix = '$npm_package_';
  if (!variableName.startsWith(prefix)) return undefined;

  const pathString = variableName.slice(prefix.length);
  const pathSegments = pathString.split('_');

  let current: unknown = packageJson;
  for (const segment of pathSegments) {
    if (current === null || current === undefined) return undefined;
    if (typeof current !== 'object') return undefined;
    current = (current as Record<string, unknown>)[segment];
  }

  if (current === null || current === undefined) return undefined;
  return String(current);
}

function hasNpmVariable(value: string | undefined): boolean {
  return value?.includes('$npm_package_') ?? false;