Function detectAuthMode

src/cli/auth-session.ts:474–483

(
  env: EnvMap,
  io?: AuthIo,
)

}

function detectAuthMode(
  env: EnvMap,
  io?: AuthIo,
): 'local-browser' | 'device-code' | 'non-interactive' {
  const stdinIsTTY = io?.stdinIsTTY ?? process.stdin.isTTY;
  const stdoutIsTTY = io?.stdoutIsTTY ?? process.stdout.isTTY;
  if (isCi(env) || !stdinIsTTY || !stdoutIsTTY) return 'non-interactive';
  if (isRemoteShell(env)) return 'device-code';
  return 'local-browser';
}

function isCi(env: EnvMap): boolean {
  return env.CI === 'true' || env.GITHUB_ACTIONS === 'true' || env.BUILDKITE === 'true';