cleanup

Author: elsh

Sources/XCBuildSupport/XcodeBuildSystem.swift

@@ -103,8 +103,6 @@ public final class XcodeBuildSystem: SPMBuildCore.BuildSystem {
 
         arguments += buildParameters.xcbuildFlags
 
-        let delegate = createBuildDelegate()
-        
         let process = Process(arguments: arguments, outputRedirection: .collect)
         try process.launch()
         let result = try process.waitUntilExit()
@@ -119,10 +117,15 @@ public final class XcodeBuildSystem: SPMBuildCore.BuildSystem {
 
         let stdout = try result.output.get()
         if !stdout.isEmpty {
-            try delegate.parse(bytes: result.output.get())
+            let delegate = createBuildDelegate()
+            delegate.parse(bytes: stdout)
         } else {
             let stderr = try result.utf8stderrOutput()
-            self.diagnostics.emit(StringError(stderr))
+            if !stderr.isEmpty {
+                diagnostics.emit(StringError(stderr))
+            } else {
+                diagnostics.emit(StringError("Unknown error: stdout and stderr are empty"))
+            }
         }
     }