Function isWithinRoot

packages/core/src/utils/fileUtils.ts:36–55

(
  pathToCheck: string,
  rootDirectory: string,
)

 * @returns True if the path is within the root directory, false otherwise.
 */
export function isWithinRoot(
  pathToCheck: string,
  rootDirectory: string,
): boolean {
  const normalizedPathToCheck = path.resolve(pathToCheck);
  const normalizedRootDirectory = path.resolve(rootDirectory);

  // Ensure the rootDirectory path ends with a separator for correct startsWith comparison,
  // unless it's the root path itself (e.g., '/' or 'C:\').
  const rootWithSeparator =
    normalizedRootDirectory === path.sep ||
    normalizedRootDirectory.endsWith(path.sep)
      ? normalizedRootDirectory
      : normalizedRootDirectory + path.sep;

  return (
    normalizedPathToCheck === normalizedRootDirectory ||
    normalizedPathToCheck.startsWith(rootWithSeparator)
  );
}

/**
 * Determines if a file is likely binary based on content sampling.