[browser] Fix ConvertDllsToWebCil stack dump on bad input to be error message with input path (dotnet#101162)

Author: danmoseley

src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 using Microsoft.Build.Framework;
@@ -59,52 +60,66 @@ public override bool Execute()
                 continue;
             }
 
-            var dllFilePath = candidate.ItemSpec;
-            var webcilFileName = Path.GetFileNameWithoutExtension(dllFilePath) + Utils.WebcilInWasmExtension;
-            string candidatePath = candidate.GetMetadata("AssetTraitName") == "Culture"
-                ? Path.Combine(OutputPath, candidate.GetMetadata("AssetTraitValue"))
-                : OutputPath;
-
-            string finalWebcil = Path.Combine(candidatePath, webcilFileName);
-
-            if (Utils.IsNewerThan(dllFilePath, finalWebcil))
+            try
             {
-                var tmpWebcil = Path.Combine(tmpDir, webcilFileName);
-                var logAdapter = new LogAdapter(Log);
-                var webcilWriter = Microsoft.WebAssembly.Build.Tasks.WebcilConverter.FromPortableExecutable(inputPath: dllFilePath, outputPath: tmpWebcil, logger: logAdapter);
-                webcilWriter.ConvertToWebcil();
-
-                if (!Directory.Exists(candidatePath))
-                    Directory.CreateDirectory(candidatePath);
-
-                if (Utils.CopyIfDifferent(tmpWebcil, finalWebcil, useHash: true))
-                    Log.LogMessage(MessageImportance.Low, $"Generated {finalWebcil} .");
-                else
-                    Log.LogMessage(MessageImportance.Low, $"Skipped generating {finalWebcil} as the contents are unchanged.");
+                TaskItem webcilItem = ConvertDll(tmpDir, candidate);
+                webCilCandidates.Add(webcilItem);
             }
-            else
+            catch (Exception ex)
             {
-                Log.LogMessage(MessageImportance.Low, $"Skipping {dllFilePath} as it is older than the output file {finalWebcil}");
+                Log.LogError($"Failed to convert '{candidate.ItemSpec}' to webcil: {ex.Message}");
+                return false;
             }
+        }
+
+        WebCilCandidates = webCilCandidates.ToArray();
+        return true;
+    }
 
-            _fileWrites.Add(finalWebcil);
+    private TaskItem ConvertDll(string tmpDir, ITaskItem candidate)
+    {
+        var dllFilePath = candidate.ItemSpec;
+        var webcilFileName = Path.GetFileNameWithoutExtension(dllFilePath) + Utils.WebcilInWasmExtension;
+        string candidatePath = candidate.GetMetadata("AssetTraitName") == "Culture"
+            ? Path.Combine(OutputPath, candidate.GetMetadata("AssetTraitValue"))
+            : OutputPath;
 
-            var webcilItem = new TaskItem(finalWebcil, candidate.CloneCustomMetadata());
-            webcilItem.SetMetadata("RelativePath", Path.ChangeExtension(candidate.GetMetadata("RelativePath"), Utils.WebcilInWasmExtension));
-            webcilItem.SetMetadata("OriginalItemSpec", finalWebcil);
+        string finalWebcil = Path.Combine(candidatePath, webcilFileName);
 
-            if (webcilItem.GetMetadata("AssetTraitName") == "Culture")
-            {
-                string relatedAsset = webcilItem.GetMetadata("RelatedAsset");
-                relatedAsset = Path.ChangeExtension(relatedAsset, Utils.WebcilInWasmExtension);
-                webcilItem.SetMetadata("RelatedAsset", relatedAsset);
-                Log.LogMessage(MessageImportance.Low, $"Changing related asset of {webcilItem} to {relatedAsset}.");
-            }
+        if (Utils.IsNewerThan(dllFilePath, finalWebcil))
+        {
+            var tmpWebcil = Path.Combine(tmpDir, webcilFileName);
+            var logAdapter = new LogAdapter(Log);
+            var webcilWriter = Microsoft.WebAssembly.Build.Tasks.WebcilConverter.FromPortableExecutable(inputPath: dllFilePath, outputPath: tmpWebcil, logger: logAdapter);
+            webcilWriter.ConvertToWebcil();
 
-            webCilCandidates.Add(webcilItem);
+            if (!Directory.Exists(candidatePath))
+                Directory.CreateDirectory(candidatePath);
+
+            if (Utils.CopyIfDifferent(tmpWebcil, finalWebcil, useHash: true))
+                Log.LogMessage(MessageImportance.Low, $"Generated {finalWebcil} .");
+            else
+                Log.LogMessage(MessageImportance.Low, $"Skipped generating {finalWebcil} as the contents are unchanged.");
+        }
+        else
+        {
+            Log.LogMessage(MessageImportance.Low, $"Skipping {dllFilePath} as it is older than the output file {finalWebcil}");
         }
 
-        WebCilCandidates = webCilCandidates.ToArray();
-        return true;
+        _fileWrites.Add(finalWebcil);
+
+        var webcilItem = new TaskItem(finalWebcil, candidate.CloneCustomMetadata());
+        webcilItem.SetMetadata("RelativePath", Path.ChangeExtension(candidate.GetMetadata("RelativePath"), Utils.WebcilInWasmExtension));
+        webcilItem.SetMetadata("OriginalItemSpec", finalWebcil);
+
+        if (webcilItem.GetMetadata("AssetTraitName") == "Culture")
+        {
+            string relatedAsset = webcilItem.GetMetadata("RelatedAsset");
+            relatedAsset = Path.ChangeExtension(relatedAsset, Utils.WebcilInWasmExtension);
+            webcilItem.SetMetadata("RelatedAsset", relatedAsset);
+            Log.LogMessage(MessageImportance.Low, $"Changing related asset of {webcilItem} to {relatedAsset}.");
+        }
+
+        return webcilItem;
     }
 }