Function resolvePath

src/path.ts:33–37

(root: string, source: string, target?: string)

export function resolvePath(source: string, target: string): string;
export function resolvePath(root: string, source: string, target: string): string;
export function resolvePath(root: string, source: string, target?: string): string {
  if (target === undefined) (target = source), (source = root), (root = ".");
  const path = join(root, target === "" ? source : target.startsWith("/") ? "." : dirname(source), target);
  return path.startsWith("../") ? path : join("/", path);
}

/**
 * Like resolvePath, except returns null if the specified target goes outside