Args parse

internal/flow-def/flow-def.go

@@ -4,6 +4,7 @@ package flowdef
 import (
 	"encoding/json"
 	"errors"
+	"os"
 )
 
 const (
@@ -109,3 +110,11 @@ func NewFlowDefJSON(
 	}
 	return string(jsonBytes), nil
 }
+
+func ReadFlowDefFile(path string) (string, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}