flutter doctorでcmdline-toolsが無いと言われた。

$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.3, on macOS 11.6 20G165 darwin-x64, locale ja-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more
      details.
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] Android Studio (version 4.1)
[✓] VS Code (version 1.62.3)
[✓] Connected device (2 available)

対応

cmdline-tools をインストールする。

1. AndroidStudioの検索ボタンを押し、`SDK Manager`を検索し、起動する

2. `SDK Tools` -> `Android SDK Command-line Tools`にチェックを入れ、applyを押すとダウンロードが始まる

3. `flutter doctor`で`cmdline-tools`がインストールされたことを確認

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.5.3, on macOS 11.6 20G165 darwin-x64, locale ja-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Android Studio (version 4.1)
[✓] Android Studio (version 4.1)
[✓] VS Code (version 1.62.3)
[✓] Connected device (2 available)

• No issues found!