feat(repo): add dart_code_metrics

Signed-off-by: xsahil03x <[email protected]>

analysis_options.yaml

@@ -1,4 +1,6 @@
 analyzer:
+  plugins:
+    - dart_code_metrics
   exclude:
     - packages/*/lib/**/*.g.dart
     - packages/*/lib/src/emoji
@@ -144,3 +146,42 @@ linter:
     - unnecessary_null_checks
     - tighten_type_of_initializing_formals
     - null_check_on_nullable_type_parameter
+
+# https://dartcodemetrics.dev/docs/getting-started/introduction
+dart_code_metrics:
+  metrics-exclude:
+    - packages/*/test/**
+  metrics:
+    - weight-of-class: 0.33
+    - source-lines-of-code: 90
+    - cyclomatic-complexity: 20
+    - maximum-nesting-level: 5
+  rules:
+    # Dart Specific
+    - avoid-ignoring-return-values
+#    - avoid-non-null-assertion
+    - avoid-unused-parameters
+    - binary-expression-operand-order
+    - double-literal-format
+      #    - member-ordering-extended
+    - member-ordering:
+        alphabetize: false
+        order:
+          - constructors
+          - public-fields
+          - private-fields
+    - no-boolean-literal-compare
+    - no-equal-arguments
+    - no-equal-then-else
+    - no-magic-number:
+        allowed: [ 3.14 ]
+    - prefer-match-file-name
+#    - prefer-trailing-comma:
+#        break-on: 2
+
+    # Flutter specific
+    - always-remove-listener
+    #    - avoid-returning-widgets
+    - avoid-unnecessary-setstate
+    - avoid-wrapping-in-padding
+

melos.yaml

@@ -11,6 +11,10 @@ scripts:
     run: melos run analyze && melos run format
     description: Run all static analysis checks
 
+  analyze:all:
+    run: melos run analyze && melos run metrics
+    description: Run all
+
   analyze:
     run: |
       melos exec -c 5 --ignore="*example*" -- \
@@ -24,6 +28,14 @@ scripts:
     description: |
       Run `flutter format --set-exit-if-changed .` in all packages.
 
+  metrics:
+    run: |
+      melos exec -c 1 --ignore="*example*" -- \
+        flutter pub run dart_code_metrics:metrics analyze lib
+    description: |
+      Run `dart_code_metrics` in all packages.
+       - Note: you can also rely on your IDEs Dart Analysis / Issues window.
+
   lint:pub:
     run: |
       melos exec -c 5 --no-private --ignore="*example*" -- \
@@ -75,6 +87,9 @@ scripts:
       npx stream-chat-docusaurus -i -s
     description: Runs the docusaurus documentation locally.
 
+dev_dependencies:
+  dart_code_metrics: ^4.2.0-dev.1
+
 environment:
   sdk: '>=2.12.0 <3.0.0'
-  flutter: '>=1.22.4 <2.0.0'
+  flutter: '>=1.17.0 <2.0.0'

packages/stream_chat/pubspec.yaml

@@ -27,6 +27,7 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.0.1
+  dart_code_metrics: ^4.2.0-dev.1
   freezed: ^0.14.1+3
   json_serializable: ^4.1.0
   mocktail: ^0.1.1

packages/stream_chat_flutter/pubspec.yaml

@@ -55,10 +55,9 @@ flutter:
   uses-material-design: true
 
 dev_dependencies:
+  dart_code_metrics: ^4.2.0-dev.1
   flutter_test:
     sdk: flutter
   golden_toolkit: ^0.9.0
   mocktail: ^0.1.2
   path: ^1.8.0
-  pedantic: ^1.11.0
-

packages/stream_chat_flutter_core/pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
   stream_chat: ^3.0.0
 
 dev_dependencies:
+  dart_code_metrics: ^4.2.0-dev.1
   fake_async: ^1.2.0
   flutter_test:
     sdk: flutter

packages/stream_chat_localizations/pubspec.yaml

@@ -17,5 +17,6 @@ dependencies:
   stream_chat_flutter: ^3.0.0
 
 dev_dependencies:
+  dart_code_metrics: ^4.2.0-dev.1
   flutter_test:
     sdk: flutter

packages/stream_chat_persistence/pubspec.yaml

@@ -7,6 +7,7 @@ issue_tracker: https://github.com/GetStream/stream-chat-flutter/issues
 
 environment:
   sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=1.17.0"
 
 dependencies:
   flutter:
@@ -22,8 +23,8 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.0.1
+  dart_code_metrics: ^4.2.0-dev.1
   flutter_test:
     sdk: flutter
   mocktail: ^0.1.1
   moor_generator: ^4.2.1
-  pedantic: ^1.11.0