[Tool] [Windows] Output app path on build completion (#122858)

[Tool] [Windows] Output app path on build completion

dev/devicelab/lib/tasks/run_tests.dart

@@ -177,6 +177,9 @@ class WindowsRunOutputTest extends DesktopRunOutputTest {
     r'Building Windows application\.\.\.\s*\d+(\.\d+)?(ms|s)',
     multiLine: true,
   );
+  static final RegExp _builtOutput = RegExp(
+    r'Built build\\windows\\runner\\(Debug|Release)\\\w+\.exe( \(\d+(\.\d+)?MB\))?\.',
+  );
 
   @override
   void verifyBuildOutput(List<String> stdout) {
@@ -185,6 +188,25 @@ class WindowsRunOutputTest extends DesktopRunOutputTest {
       _buildOutput.hasMatch,
       'Building Windows application...',
     );
+
+    final String buildMode = release ? 'Release' : 'Debug';
+    _findNextMatcherInList(
+      stdout,
+      (String line) {
+        if (!_builtOutput.hasMatch(line) || !line.contains(buildMode)) {
+          return false;
+        }
+
+        // Size information is only included in release builds.
+        final bool hasSize = line.contains('MB).');
+        if (release != hasSize) {
+          return false;
+        }
+
+        return true;
+      },
+      'Built build\\windows\\runner\\$buildMode\\app.exe',
+    );
   }
 }
 

packages/flutter_tools/lib/src/windows/build_windows.dart

@@ -8,6 +8,7 @@ import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/logger.dart';
 import '../base/project_migrator.dart';
+import '../base/terminal.dart';
 import '../base/utils.dart';
 import '../build_info.dart';
 import '../cache.dart';
@@ -92,6 +93,22 @@ Future<void> buildWindows(WindowsProject windowsProject, BuildInfo buildInfo, {
   } finally {
     status.stop();
   }
+
+  final File appFile = buildDirectory
+    .childDirectory('runner')
+    .childDirectory(sentenceCase(buildModeName))
+    .childFile('${windowsProject.parent.manifest.appName}.exe');
+  if (appFile.existsSync()) {
+    final String appSize = (buildInfo.mode == BuildMode.debug)
+        ? '' // Don't display the size when building a debug variant.
+        : ' (${getSizeAsMB(appFile.lengthSync())})';
+    globals.logger.printStatus(
+      '${globals.logger.terminal.successMark}  '
+      'Built ${globals.fs.path.relative(appFile.path)}$appSize.',
+      color: TerminalColor.green,
+    );
+  }
+
   if (buildInfo.codeSizeDirectory != null && sizeAnalyzer != null) {
     final String arch = getNameForTargetPlatform(TargetPlatform.windows_x64);
     final File codeSizeFile = globals.fs.directory(buildInfo.codeSizeDirectory)