Add --strong flag for strongMode

Author: Olivier Chafik

bin/linter.dart

@@ -57,6 +57,7 @@ void runLinter(List<String> args, LinterOptions initialLintOptions) {
         help: 'Print results in a format suitable for parsing.',
         defaultsTo: false,
         negatable: false)
+    ..addFlag('strong', help: 'Use strong-mode analyzer.')
     ..addOption('config', abbr: 'c', help: 'Use configuration from this file.')
     ..addOption('dart-sdk', help: 'Custom path to a Dart SDK.')
     ..addOption('rules',
@@ -120,6 +121,9 @@ void runLinter(List<String> args, LinterOptions initialLintOptions) {
     lintOptions.dartSdkPath = customSdk;
   }
 
+  var strongMode = options['strong'];
+  if (strongMode != null) lintOptions.strongMode = strongMode;
+
   var customPackageRoot = options['package-root'];
   if (customPackageRoot != null) {
     lintOptions.packageRootPath = customPackageRoot;

lib/src/analysis.dart

@@ -45,6 +45,7 @@ void printAndFail(String message, {int exitCode: 15}) {
 AnalysisOptions _buildAnalyzerOptions(DriverOptions options) {
   AnalysisOptionsImpl analysisOptions = new AnalysisOptionsImpl();
   analysisOptions.cacheSize = options.cacheSize;
+  analysisOptions.strongMode = options.strongMode;
   analysisOptions.hint = false;
   analysisOptions.lint = options.enableLints;
   analysisOptions.generateSdkErrors = options.showSdkWarnings;
@@ -222,6 +223,9 @@ class DriverOptions {
   /// The path to the dart SDK.
   String dartSdkPath;
 
+  /// Whether to use Dart's Strong Mode analyzer.
+  bool strongMode = true;
+
   /// Whether to show lint warnings.
   bool enableLints = true;