Analyzer was confused when you deleted files (#4528)

Also, make it clear the screen between results so it's more obvious
what's going on when you have new results (especially when you have
fixed everything).

packages/flutter_tools/lib/src/base/logger.dart

@@ -23,7 +23,7 @@ abstract class Logger {
 
   /// Display normal output of the command. This should be used for things like
   /// progress messages, success messages, or just normal command output.
-  void printStatus(String message, { bool emphasis: false });
+  void printStatus(String message, { bool emphasis: false, bool newline: true });
 
   /// Use this for verbose tracing output. Users can turn this output on in order
   /// to help diagnose issues with the toolchain or with their setup.
@@ -58,11 +58,14 @@ class StdoutLogger extends Logger {
   }
 
   @override
-  void printStatus(String message, { bool emphasis: false }) {
+  void printStatus(String message, { bool emphasis: false, bool newline: true }) {
     _status?.cancel();
     _status = null;
 
-    print(emphasis ? terminal.writeBold(message) : message);
+    if (newline)
+      stdout.writeln(emphasis ? terminal.writeBold(message) : message);
+    else
+      stdout.write(emphasis ? terminal.writeBold(message) : message);
   }
 
   @override
@@ -102,7 +105,12 @@ class BufferLogger extends Logger {
   void printError(String message, [StackTrace stackTrace]) => _error.writeln(message);
 
   @override
-  void printStatus(String message, { bool emphasis: false }) => _status.writeln(message);
+  void printStatus(String message, { bool emphasis: false, bool newline: true }) {
+    if (newline)
+      _status.writeln(message);
+    else
+      _status.write(message);
+  }
 
   @override
   void printTrace(String message) => _trace.writeln(message);
@@ -130,7 +138,8 @@ class VerboseLogger extends Logger {
   }
 
   @override
-  void printStatus(String message, { bool emphasis: false }) {
+  void printStatus(String message, { bool emphasis: false, bool newline: true }) {
+    // TODO(ianh): We ignore newline and emphasis here.
     _emit();
     lastMessage = new _LogMessage(_LogType.status, message);
   }
@@ -208,11 +217,14 @@ class AnsiTerminal {
 
   static const String _bold  = '\u001B[1m';
   static const String _reset = '\u001B[0m';
+  static const String _clear = '\u001B[2J\u001B[H';
 
   bool supportsColor;
 
   String writeBold(String str) => supportsColor ? '$_bold$str$_reset' : str;
 
+  String clearScreen() => supportsColor ? _clear : '\n\n';
+
   set singleCharMode(bool value) {
     stdin.lineMode = !value;
   }

packages/flutter_tools/lib/src/commands/analyze.dart

@@ -271,17 +271,27 @@ class AnalyzeCommand extends FlutterCommand {
     return collected;
   }
 
+
+  String analysisTarget;
+  bool firstAnalysis = true;
+  Set<String> analyzedPaths = new Set<String>();
+  Map<String, List<AnalysisError>> analysisErrors = <String, List<AnalysisError>>{};
+  Stopwatch analysisTimer;
+  int lastErrorCount = 0;
+  Status analysisStatus;
+
   Future<int> _analyzeWatch() async {
     List<String> directories;
 
     if (argResults['flutter-repo']) {
-      directories = runner.getRepoPackages().map((Directory dir) => dir.path).toList();
-      printStatus('Analyzing Flutter repository (${directories.length} projects).');
+      directories = runner.getRepoAnalysisEntryPoints().map((Directory dir) => dir.path).toList();
+      analysisTarget = 'Flutter repository';
+      printTrace('Analyzing Flutter repository:');
       for (String projectPath in directories)
         printTrace('  ${path.relative(projectPath)}');
-      printStatus('');
     } else {
       directories = <String>[Directory.current.path];
+      analysisTarget = Directory.current.path;
     }
 
     AnalysisServer server = new AnalysisServer(dartSdkPath, directories);
@@ -289,39 +299,35 @@ class AnalyzeCommand extends FlutterCommand {
     server.onErrors.listen(_handleAnalysisErrors);
 
     await server.start();
+    final int exitCode = await server.onExit;
 
-    int exitCode = await server.onExit;
     printStatus('Analysis server exited with code $exitCode.');
     return 0;
   }
 
-  bool firstAnalysis = true;
-  Set<String> analyzedPaths = new Set<String>();
-  Map<String, List<AnalysisError>> analysisErrors = <String, List<AnalysisError>>{};
-  Stopwatch analysisTimer;
-  int lastErrorCount = 0;
-  Status analysisStatus;
-
   void _handleAnalysisStatus(AnalysisServer server, bool isAnalyzing) {
     if (isAnalyzing) {
       analysisStatus?.cancel();
-
-      if (firstAnalysis) {
-        analysisStatus = logger.startProgress('Analyzing ${path.basename(Directory.current.path)}...');
-      } else {
-        analysisStatus = logger.startProgress('\nAnalyzing...');
-      }
-
+      if (!firstAnalysis)
+        printStatus('\n');
+      analysisStatus = logger.startProgress('Analyzing $analysisTarget...');
       analyzedPaths.clear();
       analysisTimer = new Stopwatch()..start();
     } else {
       analysisStatus?.stop(showElapsedTime: true);
       analysisTimer.stop();
 
-      // Sort and print errors.
-      List<AnalysisError> errors = <AnalysisError>[];
-      for (List<AnalysisError> fileErrors in analysisErrors.values)
-        errors.addAll(fileErrors);
+      logger.printStatus(terminal.clearScreen(), newline: false);
+
+      // Remove errors for deleted files, sort, and print errors.
+      final List<AnalysisError> errors = <AnalysisError>[];
+      for (String path in analysisErrors.keys.toList()) {
+        if (FileSystemEntity.isFileSync(path)) {
+          errors.addAll(analysisErrors[path]);
+        } else {
+          analysisErrors.remove(path);
+        }
+      }
 
       errors.sort();
 
@@ -341,11 +347,11 @@ class AnalyzeCommand extends FlutterCommand {
       if (firstAnalysis)
         errorsMessage = '$issueCount ${pluralize('issue', issueCount)} found';
       else if (issueDiff > 0)
-        errorsMessage = '$issueDiff new ${pluralize('issue', issueDiff)}, $issueCount total';
+        errorsMessage = '$issueCount ${pluralize('issue', issueCount)} found ($issueDiff new)';
       else if (issueDiff < 0)
-        errorsMessage = '${-issueDiff} ${pluralize('issue', -issueDiff)} fixed, $issueCount remaining';
+        errorsMessage = '$issueCount ${pluralize('issue', issueCount)} found (${-issueDiff} fixed)';
       else if (issueCount != 0)
-        errorsMessage = 'no new issues, $issueCount total';
+        errorsMessage = '$issueCount ${pluralize('issue', issueCount)} found';
       else
         errorsMessage = 'no issues found';
 

packages/flutter_tools/lib/src/commands/daemon.dart

@@ -536,7 +536,7 @@ class NotifyingLogger extends Logger {
   }
 
   @override
-  void printStatus(String message, { bool emphasis: false }) {
+  void printStatus(String message, { bool emphasis: false, bool newline: true }) {
     _messageController.add(new LogMessage('status', message));
   }
 
@@ -603,7 +603,7 @@ class _AppRunLogger extends Logger {
   }
 
   @override
-  void printStatus(String message, { bool emphasis: false }) {
+  void printStatus(String message, { bool emphasis: false, bool newline: true }) {
     domain?._sendAppEvent(app, 'log', <String, dynamic>{ 'log': message });
   }
 

packages/flutter_tools/lib/src/commands/test.dart

@@ -8,6 +8,7 @@ import 'dart:io';
 import 'package:path/path.dart' as path;
 import 'package:test/src/executable.dart' as executable; // ignore: implementation_imports
 
+import '../base/logger.dart';
 import '../dart/package_map.dart';
 import '../globals.dart';
 import '../runner/flutter_command.dart';
@@ -91,7 +92,7 @@ class TestCommand extends FlutterCommand {
     }
 
     testArgs.insert(0, '--');
-    if (Platform.environment['TERM'] == 'dumb')
+    if (!terminal.supportsColor)
       testArgs.insert(0, '--no-color');
 
     loader.installHook();

packages/flutter_tools/lib/src/globals.dart

@@ -25,7 +25,9 @@ void printError(String message, [StackTrace stackTrace]) => logger.printError(me
 
 /// Display normal output of the command. This should be used for things like
 /// progress messages, success messages, or just normal command output.
-void printStatus(String message, { bool emphasis: false }) => logger.printStatus(message, emphasis: emphasis);
+void printStatus(String message, { bool emphasis: false, bool newline: true }) {
+  logger.printStatus(message, emphasis: emphasis, newline: newline);
+}
 
 /// Use this for verbose tracing output. Users can turn this output on in order
 /// to help diagnose issues with the toolchain or with their setup.

packages/flutter_tools/lib/src/runner/flutter_command_runner.dart

@@ -264,6 +264,17 @@ class FlutterCommandRunner extends CommandRunner {
       .toList();
   }
 
+  /// Get the entry-points we want to analyze in the Flutter repo.
+  List<Directory> getRepoAnalysisEntryPoints() {
+    String rootPath = path.absolute(Cache.flutterRoot);
+    return <Directory>[
+      // not bin, and not the root
+      new Directory(path.join(rootPath, 'dev')),
+      new Directory(path.join(rootPath, 'examples')),
+      new Directory(path.join(rootPath, 'packages')),
+    ];
+  }
+
   bool _checkFlutterCopy() {
     // If the current directory is contained by a flutter repo, check that it's
     // the same flutter that is currently running.