[pigeon] Update analyzer range to 8-9 (#10466)

Updates the compatible `analyze` versions from 6-8 to 8-9. Doing this now will help avoid future compatibility problems like we saw recently with the flutter/flutter Dart roll that was blocked by needing analyzer 8, which Pigeon only very recently supported.

This drop 6-7 because it uses replacements for deprecated APIs that were introduced in 8.0, in order to allow 9.0 which removes the deprecated APIs.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Author: stuartmorgan-g

packages/pigeon/CHANGELOG.md

@@ -1,5 +1,6 @@
-## NEXT
+## 26.1.1
 
+* Updates supported `analyzer` versions to 8.x or 9.x.
 * Updates minimum supported SDK version to Flutter 3.32/Dart 3.8.
 
 ## 26.1.0

packages/pigeon/lib/src/generator_tools.dart

@@ -15,7 +15,7 @@ import 'generator.dart';
 /// The current version of pigeon.
 ///
 /// This must match the version in pubspec.yaml.
-const String pigeonVersion = '26.1.0';
+const String pigeonVersion = '26.1.1';
 
 /// Read all the content from [stdin] to a String.
 String readStdin() {

packages/pigeon/lib/src/pigeon_lib.dart

@@ -14,7 +14,7 @@ import 'package:analyzer/dart/analysis/analysis_context_collection.dart'
 import 'package:analyzer/dart/analysis/results.dart' show ParsedUnitResult;
 import 'package:analyzer/dart/analysis/session.dart' show AnalysisSession;
 import 'package:analyzer/dart/ast/ast.dart' as dart_ast;
-import 'package:analyzer/error/error.dart' show AnalysisError;
+import 'package:analyzer/diagnostic/diagnostic.dart' show Diagnostic;
 import 'package:args/args.dart';
 import 'package:meta/meta.dart' show visibleForTesting;
 import 'package:path/path.dart' as path;
@@ -467,18 +467,18 @@ class Pigeon {
         final AnalysisSession session = context.currentSession;
         final ParsedUnitResult result =
             session.getParsedUnit(path) as ParsedUnitResult;
-        if (result.errors.isEmpty) {
+        if (result.diagnostics.isEmpty) {
           final dart_ast.CompilationUnit unit = result.unit;
           unit.accept(rootBuilder);
         } else {
-          for (final AnalysisError error in result.errors) {
+          for (final Diagnostic diagnostic in result.diagnostics) {
             compilationErrors.add(
               Error(
-                message: error.message,
-                filename: error.source.fullName,
+                message: diagnostic.message,
+                filename: diagnostic.source.fullName,
                 lineNumber: calculateLineNumber(
-                  error.source.contents.data,
-                  error.offset,
+                  diagnostic.source.contents.data,
+                  diagnostic.offset,
                 ),
               ),
             );

packages/pigeon/lib/src/pigeon_lib_internal.dart

@@ -1656,7 +1656,7 @@ class RootBuilder extends dart_ast_visitor.RecursiveAstVisitor<Object?> {
           );
         } else if (node.extendsClause != null) {
           superClass = TypeDeclaration(
-            baseName: node.extendsClause!.superclass.name2.lexeme,
+            baseName: node.extendsClause!.superclass.name.lexeme,
             isNullable: false,
           );
         }
@@ -1666,7 +1666,7 @@ class RootBuilder extends dart_ast_visitor.RecursiveAstVisitor<Object?> {
           for (final dart_ast.NamedType type
               in node.implementsClause!.interfaces) {
             interfaces.add(
-              TypeDeclaration(baseName: type.name2.lexeme, isNullable: false),
+              TypeDeclaration(baseName: type.name.lexeme, isNullable: false),
             );
           }
         }
@@ -1777,8 +1777,8 @@ class RootBuilder extends dart_ast_visitor.RecursiveAstVisitor<Object?> {
         name: node.name.lexeme,
         fields: <NamedType>[],
         superClassName:
-            node.implementsClause?.interfaces.first.name2.toString() ??
-            node.extendsClause?.superclass.name2.toString(),
+            node.implementsClause?.interfaces.first.name.toString() ??
+            node.extendsClause?.superclass.name.toString(),
         isSealed: node.sealedKeyword != null,
         isSwiftClass: _hasMetadata(node.metadata, 'SwiftClass'),
         documentationComments: _documentationCommentsParser(
@@ -2137,9 +2137,9 @@ class RootBuilder extends dart_ast_visitor.RecursiveAstVisitor<Object?> {
   static String _getNamedTypeQualifiedName(dart_ast.NamedType node) {
     final dart_ast.ImportPrefixReference? importPrefix = node.importPrefix;
     if (importPrefix != null) {
-      return '${importPrefix.name.lexeme}.${node.name2.lexeme}';
+      return '${importPrefix.name.lexeme}.${node.name.lexeme}';
     }
-    return node.name2.lexeme;
+    return node.name.lexeme;
   }
 
   void _addProxyApiField(

packages/pigeon/pubspec.yaml

@@ -2,13 +2,13 @@ name: pigeon
 description: Code generator tool to make communication between Flutter and the host platform type-safe and easier.
 repository: https://github.com/flutter/packages/tree/main/packages/pigeon
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+pigeon%22
-version: 26.1.0 # This must match the version in lib/src/generator_tools.dart
+version: 26.1.1 # This must match the version in lib/src/generator_tools.dart
 
 environment:
   sdk: ^3.8.0
 
 dependencies:
-  analyzer: ">=6.0.0 <9.0.0"
+  analyzer: ">=8.0.0 <10.0.0"
   args: ^2.1.0
   code_builder: ^4.10.0
   collection: ^1.15.0