Function isValidGitSha

src/utils/git/gitFilesystem.ts:129–131

(s: string)

 * could otherwise return arbitrary content that flows into shell contexts.
 */
export function isValidGitSha(s: string): boolean {
  return /^[0-9a-f]{40}$/.test(s) || /^[0-9a-f]{64}$/.test(s)
}

// ---------------------------------------------------------------------------
// readGitHead — parse .git/HEAD