Merge pull request #42 from BaseflowIT/maintenance/fix_analysis

Update and fix Flutter Analyze configuration

analysis_options.yaml

@@ -7,7 +7,9 @@
 # See the configuration guide for more
 # https://github.com/dart-lang/sdk/tree/master/pkg/analyzer#configuring-the-analyzer
 #
-# There are four similar analysis options files in the flutter repos:
+# There are other similar analysis options files in the flutter repos,
+# which should be kept in sync with this file:
+#
 #   - analysis_options.yaml (this file)
 #   - packages/flutter/lib/analysis_options_user.yaml
 #   - https://github.com/flutter/plugins/blob/master/analysis_options.yaml
@@ -15,13 +17,8 @@
 #
 # This file contains the analysis options used by Flutter tools, such as IntelliJ,
 # Android Studio, and the `flutter analyze` command.
-#
-# The flutter/plugins repo contains a copy of this file, which should be kept
-# in sync with this file.
 
 analyzer:
-  language:
-    enableSuperMixins: true
   strong-mode:
     implicit-dynamic: false
   errors:
@@ -67,38 +64,43 @@ linter:
     - avoid_relative_lib_imports
     - avoid_renaming_method_parameters
     - avoid_return_types_on_setters
-    # - avoid_returning_null # we do this commonly
-    # - avoid_returning_this # https://github.com/dart-lang/linter/issues/842
+    # - avoid_returning_null # there are plenty of valid reasons to return null
+    # - avoid_returning_this # there are plenty of valid reasons to return this
     # - avoid_setters_without_getters # not yet tested
     # - avoid_single_cascade_in_expression_statements # not yet tested
     - avoid_slow_async_io
-    # - avoid_types_as_parameter_names # https://github.com/dart-lang/linter/pull/954/files
+    - avoid_types_as_parameter_names
     # - avoid_types_on_closure_parameters # conflicts with always_specify_types
-    # - avoid_unused_constructor_parameters # https://github.com/dart-lang/linter/pull/847
+    - avoid_unused_constructor_parameters
+    - avoid_void_async
     - await_only_futures
     - camel_case_types
     - cancel_subscriptions
     # - cascade_invocations # not yet tested
-    # - close_sinks # https://github.com/flutter/flutter/issues/5789
-    # - comment_references # blocked on https://github.com/dart-lang/dartdoc/issues/1153
-    # - constant_identifier_names # https://github.com/dart-lang/linter/issues/204
+    # - close_sinks # not reliable enough
+    # - comment_references # blocked on https://github.com/flutter/flutter/issues/20765
+    # - constant_identifier_names # needs an opt-out https://github.com/dart-lang/linter/issues/204
     - control_flow_in_finally
+    # - curly_braces_in_flow_control_structures # not yet tested
     - directives_ordering
     - empty_catches
     - empty_constructor_bodies
     - empty_statements
+    # - file_names # not yet tested
     - hash_and_equals
     - implementation_imports
-    # - invariant_booleans # https://github.com/flutter/flutter/issues/5790
+    # - invariant_booleans # too many false positives: https://github.com/dart-lang/linter/issues/811
     - iterable_contains_unrelated_type
     # - join_return_with_assignment # not yet tested
     - library_names
     - library_prefixes
+    # - lines_longer_than_80_chars # not yet tested
     - list_remove_unrelated_type
-    # - literal_only_boolean_expressions # https://github.com/flutter/flutter/issues/5791
+    # - literal_only_boolean_expressions # too many false positives: https://github.com/dart-lang/sdk/issues/34181
     - no_adjacent_strings_in_list
     - no_duplicate_case_values
     - non_constant_identifier_names
+    # - null_closures  # not yet tested
     # - omit_local_variable_types # opposite of always_specify_types
     # - one_member_abstracts # too many false positives
     # - only_throw_errors # https://github.com/flutter/flutter/issues/5792
@@ -124,13 +126,17 @@ linter:
     - prefer_final_locals
     - prefer_foreach
     # - prefer_function_declarations_over_variables # not yet tested
+    - prefer_generic_function_type_aliases
     - prefer_initializing_formals
     # - prefer_interpolation_to_compose_strings # not yet tested
-    # - prefer_iterable_whereType # https://github.com/dart-lang/sdk/issues/32463
     - prefer_is_empty
     - prefer_is_not_empty
+    - prefer_iterable_whereType
+    # - prefer_mixin # https://github.com/dart-lang/language/issues/32
     - prefer_single_quotes
     - prefer_typing_uninitialized_variables
+    - prefer_void_to_null
+    # - public_member_api_docs # enabled on a case-by-case basis; see e.g. packages/analysis_options.yaml
     - recursive_getters
     - slash_for_doc_comments
     - sort_constructors_first
@@ -140,21 +146,22 @@ linter:
     - throw_in_finally
     # - type_annotate_public_apis # subset of always_specify_types
     - type_init_formals
-    # - unawaited_futures # https://github.com/flutter/flutter/issues/5793
+    # - unawaited_futures # too many false positives
     - unnecessary_brace_in_string_interps
-    # - unnecessary_const
+    - unnecessary_const
     - unnecessary_getters_setters
-    # - unnecessary_lambdas # https://github.com/dart-lang/linter/issues/498
+    # - unnecessary_lambdas # has false positives: https://github.com/dart-lang/linter/issues/498
+    - unnecessary_new
     - unnecessary_null_aware_assignments
     - unnecessary_null_in_if_null_operators
     - unnecessary_overrides
     - unnecessary_parenthesis
-    # - unnecessary_statements # not yet tested
+    - unnecessary_statements
     - unnecessary_this
     - unrelated_type_equality_checks
     - use_rethrow_when_possible
     # - use_setters_to_change_properties # not yet tested
-    # - use_string_buffers # https://github.com/dart-lang/linter/pull/664
+    # - use_string_buffers # has false positives: https://github.com/dart-lang/sdk/issues/34182
     # - use_to_and_as_if_applicable # has false positives, so we prefer to catch this by code-review
     - valid_regexps
-    # - void_checks # not yet tested
+    # - void_checks # not yet tested
\ No newline at end of file

example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>BuildSystemType</key>
+	<string>Original</string>
+</dict>
+</plist>

example/lib/main.dart

@@ -3,14 +3,14 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:permission_handler/permission_handler.dart';
 
-void main() => runApp(new MyApp());
+void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
-        home: new Scaffold(
-      appBar: new AppBar(
+    return MaterialApp(
+        home: Scaffold(
+      appBar: AppBar(
         title: const Text('Plugin example app'),
         actions: <Widget>[
           IconButton(
@@ -21,8 +21,8 @@ class MyApp extends StatelessWidget {
           )
         ],
       ),
-      body: new Center(
-        child: new ListView(
+      body: Center(
+        child: ListView(
             children: PermissionGroup.values
                 .where((PermissionGroup permission) {
                   if (Platform.isIOS) {
@@ -38,7 +38,7 @@ class MyApp extends StatelessWidget {
                   }
                 })
                 .map((PermissionGroup permission) =>
-                    new PermissionWidget(permission))
+                    PermissionWidget(permission))
                 .toList()),
       ),
     ));
@@ -67,12 +67,14 @@ class _PermissionState extends State<PermissionWidget> {
     _listenForPermissionStatus();
   }
 
-  void _listenForPermissionStatus() async {
-    final PermissionStatus status =
-        await PermissionHandler().checkPermissionStatus(_permissionGroup);
+  void _listenForPermissionStatus() {
+    final Future<PermissionStatus> statusFuture =
+        PermissionHandler().checkPermissionStatus(_permissionGroup);
 
-    setState(() {
-      _permissionStatus = status;
+    statusFuture.then((PermissionStatus status) {
+      setState(() {
+        _permissionStatus = status;
+      });
     });
   }
 
@@ -89,11 +91,11 @@ class _PermissionState extends State<PermissionWidget> {
 
   @override
   Widget build(BuildContext context) {
-    return new ListTile(
-      title: new Text(_permissionGroup.toString()),
-      subtitle: new Text(
+    return ListTile(
+      title: Text(_permissionGroup.toString()),
+      subtitle: Text(
         _permissionStatus.toString(),
-        style: new TextStyle(color: getPermissionColor()),
+        style: TextStyle(color: getPermissionColor()),
       ),
       onTap: () async {
         requestPermission(_permissionGroup);
@@ -101,13 +103,16 @@ class _PermissionState extends State<PermissionWidget> {
     );
   }
 
-  void requestPermission(PermissionGroup permission) async {
+  void requestPermission(PermissionGroup permission) {
     final List<PermissionGroup> permissions = <PermissionGroup>[permission];
-    final Map<PermissionGroup, PermissionStatus> permissionRequestResult =
-        await PermissionHandler().requestPermissions(permissions);
-
-    setState(() {
-      _permissionStatus = permissionRequestResult[permission];
+    final Future<Map<PermissionGroup, PermissionStatus>> requestFuture =
+        PermissionHandler().requestPermissions(permissions);
+
+    requestFuture
+        .then((Map<PermissionGroup, PermissionStatus> permissionRequestResult) {
+      setState(() {
+        _permissionStatus = permissionRequestResult[permission];
+      });
     });
   }
 }

lib/permission_handler.dart

@@ -15,9 +15,9 @@ class PermissionHandler {
   factory PermissionHandler() {
     if (_instance == null) {
       const MethodChannel methodChannel =
-          const MethodChannel('flutter.baseflow.com/permissions/methods');
+          MethodChannel('flutter.baseflow.com/permissions/methods');
 
-      _instance = new PermissionHandler.private(methodChannel);
+      _instance = PermissionHandler.private(methodChannel);
     }
     return _instance;
   }