Add missing licenses, and add a check (flutter#3720)

Adds a new CI check that all code files have a copyright+license block (and that it's one we are expecting to see).

Fixes the ~350 files (!) that did not have them. This includes all of the files in the .../example/ directories, following the example of flutter/flutter. (This does mean some manual intervention will be needed when generating new example directories in the future, but it's one-time per example.)

Also standardized some variants that used different line breaks than most of the rest of the repo (likely added since I standardized them all a while ago, but didn't add a check for at the time to enforce going forward), to simplify the checks.

Fixes flutter#77114

.cirrus.yml

@@ -50,6 +50,11 @@ task:
         - ./script/check_publish.sh
     - name: format
       format_script: ./script/incremental_build.sh format --fail-on-change
+      license_script:
+        - cd script/tool
+        - pub get
+        - cd ../..
+        - dart script/tool/lib/src/main.dart license-check
     - name: test
       env:
         matrix:

packages/android_alarm_manager/example/android/app/src/main/java/io/flutter/plugins/androidalarmmanagerexample/Application.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidalarmmanagerexample;
 
 import io.flutter.app.FlutterApplication;

packages/android_alarm_manager/example/integration_test/android_alarm_manager_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // @dart=2.9
 

packages/android_alarm_manager/example/test_driver/integration_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // @dart=2.9
 

packages/android_intent/android/src/main/java/io/flutter/plugins/androidintent/AndroidIntentPlugin.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintent;
 
 import androidx.annotation.NonNull;

packages/android_intent/android/src/main/java/io/flutter/plugins/androidintent/IntentSender.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintent;
 
 import android.app.Activity;

packages/android_intent/android/src/main/java/io/flutter/plugins/androidintent/MethodCallHandlerImpl.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintent;
 
 import android.content.ComponentName;

packages/android_intent/android/src/test/java/io/flutter/plugins/androidintent/MethodCallHandlerImplTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintent;
 
 import static org.junit.Assert.assertEquals;

packages/android_intent/example/android/app/src/androidTestDebug/java/io/flutter/plugins/androidintentexample/EmbeddingV1ActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintentexample;
 
 import androidx.test.rule.ActivityTestRule;

packages/android_intent/example/android/app/src/androidTestDebug/java/io/flutter/plugins/androidintentexample/MainActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.androidintentexample;
 
 import androidx.test.rule.ActivityTestRule;

packages/android_intent/lib/flag.dart

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// Special flags that can be set on an intent to control how it is handled.
 ///
 /// See

packages/battery/battery/integration_test/battery_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // @dart = 2.9
 

packages/battery/battery_platform_interface/lib/enums/battery_state.dart

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// Indicates the current battery state.
 enum BatteryState {
   /// The battery is completely full of energy.

packages/battery/battery_platform_interface/lib/method_channel/method_channel_battery.dart

@@ -1,3 +1,7 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:async';
 
 import 'package:flutter/services.dart';

packages/camera/camera/example/android/app/src/androidTestDebug/java/io/flutter/plugins/cameraexample/EmbeddingV1ActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.cameraexample;
 
 import androidx.test.rule.ActivityTestRule;

packages/camera/camera/example/android/app/src/androidTestDebug/java/io/flutter/plugins/cameraexample/FlutterActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.cameraexample;
 
 import androidx.test.rule.ActivityTestRule;

packages/camera/camera/example/android/app/src/main/java/io/flutter/plugins/cameraexample/EmbeddingV1Activity.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.cameraexample;
 
 import android.os.Bundle;

packages/camera/camera/example/integration_test/camera_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // TODO(mvanbeusekom): Remove this once flutter_driver supports null safety.
 // https://github.com/flutter/flutter/issues/71379

packages/camera/camera/example/ios/Runner/AppDelegate.h

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 #import <Flutter/Flutter.h>
 #import <UIKit/UIKit.h>
 

packages/camera/camera/example/ios/Runner/AppDelegate.m

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 #include "AppDelegate.h"
 #include "GeneratedPluginRegistrant.h"
 

packages/camera/camera/example/ios/Runner/main.m

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 #import <Flutter/Flutter.h>
 #import <UIKit/UIKit.h>
 #import "AppDelegate.h"

packages/camera/camera/example/test_driver/integration_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // TODO(mvanbeusekom): Remove this once flutter_driver supports null safety.
 // https://github.com/flutter/flutter/issues/71379

packages/camera/camera/ios/Tests/CameraPluginTests.m

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 @import camera;
 @import XCTest;
 

packages/camera/camera/test/camera_image_stream_test.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:camera/camera.dart';
 import 'package:camera_platform_interface/camera_platform_interface.dart';
 import 'package:flutter/widgets.dart';

packages/camera/camera_platform_interface/lib/src/types/image_format_group.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// Group of image formats that are comparable across Android and iOS platforms.
 enum ImageFormatGroup {
   /// The image format does not fit into any specific group.

packages/camera/camera_platform_interface/lib/src/utils/utils.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:camera_platform_interface/camera_platform_interface.dart';
 import 'package:flutter/services.dart';
 

packages/camera/camera_platform_interface/test/types/image_group_test.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:camera_platform_interface/src/types/types.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/camera/camera_platform_interface/test/utils/utils_test.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:camera_platform_interface/camera_platform_interface.dart';
 import 'package:camera_platform_interface/src/utils/utils.dart';
 import 'package:flutter/services.dart';

packages/connectivity/connectivity/example/android/app/src/test/java/io/flutter/plugins/connectivityexample/ActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.connectivityexample;
 
 import static org.junit.Assert.assertNotNull;

packages/connectivity/connectivity/example/macos/Runner/AppDelegate.swift

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import Cocoa
 import FlutterMacOS
 

packages/connectivity/connectivity/example/macos/Runner/MainFlutterWindow.swift

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import Cocoa
 import FlutterMacOS
 

packages/connectivity/connectivity/example/web/index.html

@@ -1,4 +1,7 @@
 <!DOCTYPE html>
+<!-- Copyright 2020 The Flutter Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file. -->
 <html>
 <head>
   <meta charset="UTF-8">

packages/connectivity/connectivity_for_web/example/integration_test/network_information_test.dart

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:connectivity_for_web/src/network_information_api_connectivity_plugin.dart';
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/connectivity/connectivity_for_web/example/integration_test/src/connectivity_mocks.dart

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:async';
 import 'dart:html';
 import 'dart:js_util' show getProperty;

packages/connectivity/connectivity_for_web/example/run_test.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/bash
+# Copyright 2017 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 if pgrep -lf chromedriver > /dev/null; then
   echo "chromedriver is running."
 

packages/connectivity/connectivity_for_web/example/web/index.html

@@ -1,4 +1,7 @@
 <!DOCTYPE html>
+<!-- Copyright 2020 The Flutter Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file. -->
 <html>
 <head>
   <meta charset="UTF-8">

packages/connectivity/connectivity_for_web/lib/connectivity_for_web.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:async';
 
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';

packages/connectivity/connectivity_for_web/lib/src/dart_html_connectivity_plugin.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:async';
 import 'dart:html' as html show window;
 

packages/connectivity/connectivity_for_web/lib/src/network_information_api_connectivity_plugin.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:async';
 import 'dart:html' as html show window, NetworkInformation;
 import 'dart:js' show allowInterop;

packages/connectivity/connectivity_for_web/lib/src/utils/connectivity_result.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'dart:html' as html show NetworkInformation;
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';
 

packages/connectivity/connectivity_for_web/test/tests_exist_elsewhere_test.dart

@@ -1,3 +1,7 @@
+// Copyright 2019 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {

packages/connectivity/connectivity_macos/example/macos/Runner/AppDelegate.swift

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import Cocoa
 import FlutterMacOS
 

packages/connectivity/connectivity_macos/example/macos/Runner/MainFlutterWindow.swift

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import Cocoa
 import FlutterMacOS
 

packages/connectivity/connectivity_platform_interface/lib/src/enums.dart

@@ -1,3 +1,7 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 /// Connection status check result.
 enum ConnectivityResult {
   /// WiFi: Device connected via Wi-Fi

packages/connectivity/connectivity_platform_interface/lib/src/utils.dart

@@ -1,3 +1,7 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';
 
 /// Convert a String to a ConnectivityResult value.

packages/device_info/device_info/example/android/app/src/main/java/io/flutter/plugins/deviceinfoexample/EmbeddingV1ActivityTest.java

@@ -1,3 +1,7 @@
+// Copyright 2017 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 package io.flutter.plugins.deviceinfoexample;
 
 import androidx.test.rule.ActivityTestRule;

packages/device_info/device_info/example/integration_test/device_info_test.dart

@@ -1,6 +1,6 @@
-// Copyright 2019, the Chromium project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+// Copyright 2019, the Chromium project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 // TODO(cyanglaz): Remove once https://github.com/flutter/plugins/pull/3158 is landed.
 // @dart = 2.9