feat(executor/sandbox): 1 cmd each time

internal/executor/sandbox/executor.go

@@ -21,6 +21,7 @@ func (e *Sandbox) Run(cmds []stage.Cmd) ([]stage.ExecutorResult, error) {
 		}
 	}
 	// cannot use range loop since we need to change the value
+	results := make([]stage.ExecutorResult, len(cmds))
 	for i := 0; i < len(cmds); i += 1 {
 		cmd := &cmds[i]
 		if cmd.CopyIn == nil {
@@ -31,23 +32,20 @@ func (e *Sandbox) Run(cmds []stage.Cmd) ([]stage.ExecutorResult, error) {
 				cmd.CopyIn[k] = stage.CmdFile{FileID: &fileID}
 			}
 		}
-	}
-	pbCmds := convertPBCmd(cmds)
-	for i, pbCmd := range pbCmds {
-		slog.Debug("sandbox execute", "i", i, "pbCmd size", proto.Size(pbCmd))
-	}
-	pbReq := &pb.Request{Cmd: pbCmds}
-	slog.Debug("sandbox execute", "pbReq size", proto.Size(pbReq))
-	pbRet, err := e.execClient.Exec(context.TODO(), pbReq)
-	if err != nil {
-		return nil, err
-	}
-	if pbRet.Error != "" {
-		return nil, fmt.Errorf("sandbox execute error: %s", pbRet.Error)
-	}
-	results := convertPBResult(pbRet.Results)
-	for _, result := range results {
+		pbCmd := convertPBCmd([]stage.Cmd{*cmd})
+		slog.Debug("sandbox execute", "i", i, "pbCmd size", proto.Size(pbCmd[0]))
+		pbReq := &pb.Request{Cmd: pbCmd}
+		slog.Debug("sandbox execute", "pbReq size", proto.Size(pbReq))
+		pbRet, err := e.execClient.Exec(context.TODO(), pbReq)
+		if err != nil {
+			return nil, err
+		}
+		if pbRet.Error != "" {
+			return nil, fmt.Errorf("sandbox execute error: %s", pbRet.Error)
+		}
+		result := convertPBResult(pbRet.Results)[0]
 		maps.Copy(e.cachedMap, result.FileIDs)
+		results[i] = result
 	}
 	return results, nil
 }

internal/parser/diff/parser.go

@@ -39,17 +39,19 @@ func (*Diff) Run(results []stage.ExecutorResult, confAny any) (
 				if err != nil {
 					return nil, true, err
 				}
+				answerStr := string(answer)
+				resultStr := result.Files[output.FileName]
 				isSame := stringsEqual(
-					string(answer),
-					result.Files[output.FileName],
+					answerStr,
+					resultStr,
 					output.CompareSpace,
 				)
-				slog.Debug(
+				slog.Info(
 					"compare",
 					"filename", output.FileName,
 					"answerPath", output.AnswerPath,
-					"actualLength", len(result.Files[output.FileName]),
-					"answerLength", len(string(answer)),
+					"actualLength", len(resultStr),
+					"answerLength", len(answerStr),
 					"index", i,
 					"isSame", isSame,
 				)
@@ -73,8 +75,6 @@ func (*Diff) Run(results []stage.ExecutorResult, confAny any) (
 						}
 						// Convert answer to string and split by lines
 						truncated := false
-						answerStr := string(answer)
-						resultStr := result.Files[output.FileName]
 						if len(answerStr) > output.MaxDiffLength {
 							answerStr = answerStr[:output.MaxDiffLength]
 							truncated = true