refactor(cli): modularize CLI — extract parser, runner, report and main logic into dedicated files

benchmark_cherrypick/lib/cli/parser.dart

@@ -0,0 +1,104 @@
+import 'dart:io';
+
+import 'package:args/args.dart';
+import 'package:benchmark_cherrypick/scenarios/universal_chain_module.dart';
+
+enum UniversalBenchmark {
+  registerSingleton,
+  chainSingleton,
+  chainFactory,
+  chainAsync,
+  named,
+  override,
+}
+
+UniversalScenario toScenario(UniversalBenchmark b) {
+  switch (b) {
+    case UniversalBenchmark.registerSingleton:
+      return UniversalScenario.register;
+    case UniversalBenchmark.chainSingleton:
+      return UniversalScenario.chain;
+    case UniversalBenchmark.chainFactory:
+      return UniversalScenario.chain;
+    case UniversalBenchmark.chainAsync:
+      return UniversalScenario.asyncChain;
+    case UniversalBenchmark.named:
+      return UniversalScenario.named;
+    case UniversalBenchmark.override:
+      return UniversalScenario.override;
+  }
+}
+
+UniversalBindingMode toMode(UniversalBenchmark b) {
+  switch (b) {
+    case UniversalBenchmark.registerSingleton:
+      return UniversalBindingMode.singletonStrategy;
+    case UniversalBenchmark.chainSingleton:
+      return UniversalBindingMode.singletonStrategy;
+    case UniversalBenchmark.chainFactory:
+      return UniversalBindingMode.factoryStrategy;
+    case UniversalBenchmark.chainAsync:
+      return UniversalBindingMode.asyncStrategy;
+    case UniversalBenchmark.named:
+      return UniversalBindingMode.singletonStrategy;
+    case UniversalBenchmark.override:
+      return UniversalBindingMode.singletonStrategy;
+  }
+}
+
+T parseEnum<T>(String value, List<T> values, T defaultValue) {
+  return values.firstWhere(
+    (v) => v.toString().split('.').last.toLowerCase() == value.toLowerCase(),
+    orElse: () => defaultValue,
+  );
+}
+
+List<int> parseIntList(String s) =>
+    s.split(',').map((e) => int.tryParse(e.trim()) ?? 0).where((x) => x > 0).toList();
+
+class BenchmarkCliConfig {
+  final List<UniversalBenchmark> benchesToRun;
+  final List<int> chainCounts;
+  final List<int> nestDepths;
+  final int repeats;
+  final int warmups;
+  final String format;
+  BenchmarkCliConfig({
+    required this.benchesToRun,
+    required this.chainCounts,
+    required this.nestDepths,
+    required this.repeats,
+    required this.warmups,
+    required this.format,
+  });
+}
+
+BenchmarkCliConfig parseBenchmarkCli(List<String> args) {
+  final parser = ArgParser()
+    ..addOption('benchmark', abbr: 'b', defaultsTo: 'chainSingleton')
+    ..addOption('chainCount', abbr: 'c', defaultsTo: '10')
+    ..addOption('nestingDepth', abbr: 'd', defaultsTo: '5')
+    ..addOption('repeat', abbr: 'r', defaultsTo: '2')
+    ..addOption('warmup', abbr: 'w', defaultsTo: '1')
+    ..addOption('format', abbr: 'f', defaultsTo: 'pretty')
+    ..addFlag('help', abbr: 'h', negatable: false, help: 'Show help');
+  final result = parser.parse(args);
+  if (result['help'] == true) {
+    print(parser.usage);
+    exit(0);
+  }
+  final benchName = result['benchmark'] as String;
+  final isAll = benchName == 'all';
+  final allBenches = UniversalBenchmark.values;
+  final benchesToRun = isAll
+      ? allBenches
+      : [parseEnum(benchName, allBenches, UniversalBenchmark.chainSingleton)];
+  return BenchmarkCliConfig(
+    benchesToRun: benchesToRun,
+    chainCounts: parseIntList(result['chainCount'] as String),
+    nestDepths: parseIntList(result['nestingDepth'] as String),
+    repeats: int.tryParse(result['repeat'] as String? ?? "") ?? 2,
+    warmups: int.tryParse(result['warmup'] as String? ?? "") ?? 1,
+    format: result['format'] as String,
+  );
+}