Report all transformer load errors before exiting.

sdk/lib/_internal/pub/bin/pub.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:args/args.dart';
 import 'package:http/http.dart' as http;
 import 'package:path/path.dart' as path;
-import 'package:source_maps/source_maps.dart';
 import 'package:stack_trace/stack_trace.dart';
 
 import '../lib/src/command.dart';
 import '../lib/src/exceptions.dart';
 import '../lib/src/exit_codes.dart' as exit_codes;
 import '../lib/src/http.dart';
 import '../lib/src/io.dart';
 import '../lib/src/log.dart' as log;
 import '../lib/src/sdk.dart' as sdk;
 import '../lib/src/utils.dart';
@@ skipping 59 matching lines @@
 ///
 /// Handles and correctly reports any errors that occur while running.
 void runPub(String cacheDir, ArgResults options, List<String> arguments) {
   var captureStackChains =
       options['trace'] ||
       options['verbose'] ||
       options['verbosity'] == 'all';
 
   captureErrors(() => invokeCommand(cacheDir, options),
       captureStackChains: captureStackChains).catchError((error, Chain chain) {
-    // This is basically the top-level exception handler so that we don't
-    // spew a stack trace on our users.
-    if (error is SpanException) {
-      log.error(error.toString(useColors: canUseSpecialChars));
-    } else {
-      log.error(getErrorMessage(error));
-    }
-    log.fine("Exception type: ${error.runtimeType}");
-
-    if (log.json.enabled) {
-      if (error is UsageException) {
-        // Don't print usage info in JSON output.
-        log.json.error(error.message);
-      } else {
-        log.json.error(error);
-      }
-    }
-
-    if (options['trace'] || !isUserFacingException(error)) {
-      log.error(chain.terse);
-    } else {
-      log.fine(chain.terse);
-    }
-
-    if (error is WrappedException && error.innerError != null) {
-      var message = "Wrapped exception: ${error.innerError}";
-      if (error.innerChain != null) message = "$message\n${error.innerChain}";
-      log.fine(message);
-    }
+    log.exception(error, chain);
 
     if (options['trace']) {
       log.dumpTranscript();
     } else if (!isUserFacingException(error)) {
       log.error("""
 This is an unexpected error. Please run
 
     pub --trace ${arguments.map((arg) => "'$arg'").join(' ')}
 
 and include the results in a bug report on http://dartbug.com/new.
 """);
     }
 
     return flushThenExit(chooseExitCode(error));
   }).then((_) {
     // Explicitly exit on success to ensure that any dangling dart:io handles
     // don't cause the process to never terminate.
     return flushThenExit(exit_codes.SUCCESS);
   });
 }
 
 /// Returns the appropriate exit code for [exception], falling back on 1 if no
 /// appropriate exit code could be found.
 int chooseExitCode(exception) {
+  while (exception is WrappedException) exception = exception.innerError;
+
   if (exception is HttpException || exception is http.ClientException ||
       exception is SocketException || exception is PubHttpException) {
     return exit_codes.UNAVAILABLE;
   } else if (exception is FormatException || exception is DataException) {
     return exit_codes.DATA;
   } else if (exception is UsageException) {
     return exit_codes.USAGE;
   } else {
     return 1;
   }
@@ skipping 61 matching lines @@
     if (Platform.operatingSystem != 'windows') return null;
 
     return runProcess('ver', []).then((result) {
       if (result.stdout.join('\n').contains('XP')) {
         log.error('Sorry, but pub is not supported on Windows XP.');
         return flushThenExit(exit_codes.USAGE);
       }
     });
   });
 }