path fix

src/Runner.Worker/Handlers/ScriptHandler.cs

@@ -249,7 +249,7 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 // We do not not the full path until we know what shell is being used, so that we can determine the file extension
                 scriptFilePath = Path.Combine(tempDirectory, $"{Guid.NewGuid()}{ScriptHandlerHelpers.GetScriptFileExtension(shellCommand)}");
-                resolvedScriptPath = StepHost.ResolvePathForStepHost(ExecutionContext, scriptFilePath).Replace("\"", "\\\"");
+                resolvedScriptPath = $"\"{StepHost.ResolvePathForStepHost(ExecutionContext, scriptFilePath).Replace("\"", "\\\"")}\"";
             }
             else
             {
@@ -260,7 +260,7 @@ namespace GitHub.Runner.Worker.Handlers
                 }
                 scriptFilePath = Inputs["path"];
                 ArgUtil.NotNullOrEmpty(scriptFilePath, "path");
-                resolvedScriptPath = Inputs["path"].Replace("\"", "\\\"");
+                resolvedScriptPath = $"\"{Inputs["path"].Replace("\"", "\\\"")}\"";
             }
 
             // Format arg string with script path

src/Test/L0/Worker/Handlers/ScriptHandlerL0.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.Pipelines.ContextData;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common;
+using GitHub.Runner.Worker;
+using GitHub.Runner.Worker.Handlers;
+using Moq;
+using Xunit;
+
+namespace GitHub.Runner.Common.Tests.Worker.Handlers
+{
+    public sealed class ScriptHandlerL0
+    {
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void ScriptPath_WithSpaces_ShouldBeQuoted()
+        {
+            // Arrange
+            using (TestHostContext hc = CreateTestContext())
+            {
+                var scriptHandler = new ScriptHandler();
+                scriptHandler.Initialize(hc);
+
+                // Create a mock temp directory path with spaces
+                var tempPathWithSpaces = "/path with spaces/_temp";
+                var scriptPathWithSpaces = Path.Combine(tempPathWithSpaces, "test-script.sh");
+                
+                // Test the logic that our fix addresses
+                var originalPath = scriptPathWithSpaces.Replace("\"", "\\\"");
+                var quotedPath = $"\"{scriptPathWithSpaces.Replace("\"", "\\\"")}\"";
+                
+                // Assert
+                Assert.False(originalPath.StartsWith("\""), "Original path should not be quoted");
+                Assert.True(quotedPath.StartsWith("\"") && quotedPath.EndsWith("\""), "Fixed path should be properly quoted");
+                Assert.Contains("path with spaces", quotedPath, StringComparison.Ordinal);
+            }
+        }
+
+        private TestHostContext CreateTestContext([CallerMemberName] string testName = "")
+        {
+            var hc = new TestHostContext(this, testName);
+            return hc;
+        }
+    }
+}