Function getHeadForDir

src/utils/git/gitFilesystem.ts:593–606

(cwd: string)

 * Used by plugins that need the HEAD of a specific repo, not the CWD repo.
 */
export async function getHeadForDir(cwd: string): Promise<string | null> {
  const gitDir = await resolveGitDir(cwd)
  if (!gitDir) {
    return null
  }
  const head = await readGitHead(gitDir)
  if (!head) {
    return null
  }
  if (head.type === 'branch') {
    return resolveRef(gitDir, `refs/heads/${head.name}`)
  }
  return head.sha
}

/**
 * Read the HEAD SHA for a git worktree directory (not the main repo).