Modify the Executor to correctly return error messages from failures in each library (#14)

Author: Jaeho Choi

src/main/scala/fhetest/Phase/Execute.scala

@@ -21,11 +21,14 @@ case object Execute {
       Process(executeCommand, new File(binPath))
     cmakeProcess.!(silentLogger)
     makeProcess.!(silentLogger)
+
+    val errorSB = new StringBuilder()
     try {
-      val executeResult = executeProcess.!!
-      executeResult // 성공적으로 완료된 경우, 결과 반환
+      val errLogger = errorLogger(errorSB)
+      val executeResult = executeProcess.!!(errLogger)
+      executeResult // Return the result if it is successfully completed
     } catch {
-      case e: Exception => s"Execution failed: ${e.getMessage}"
+      case e: Exception => errorSB.toString()
     }
   }
 }

src/main/scala/fhetest/Utils/Utils.scala

@@ -5,8 +5,9 @@ import org.twc.terminator.Main.ENC_TYPE as T2ENC_TYPE
 import sys.process.*
 import java.nio.file.{Files, Path, Paths, StandardCopyOption}
 import java.util.Comparator
-import scala.util.Try
 
+import scala.util.Try
+import scala.collection.mutable.StringBuilder
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.Future
 import java.util.concurrent.atomic.AtomicInteger
@@ -120,6 +121,7 @@ def withBackendTempDir[Result](
 }
 
 val silentLogger = ProcessLogger(_ => (), _ => ())
+def errorLogger(s: StringBuilder) = ProcessLogger(_ => (), err => s.append(err))
 
 def compare(obtained: String, expected: String): Unit = {
   val obtainedLines = obtained.split("\n")