[ModelicaSystem] consider relativ path if ModelicaSystem is run locally

Author: syntron

OMPython/ModelicaSystem.py

@@ -38,6 +38,7 @@
 import numbers
 import numpy as np
 import os
+import pathlib
 import platform
 import re
 import subprocess
@@ -472,18 +473,30 @@ def model(
         # set variables
         self._model_name = name  # Model class name
         self._libraries = libraries  # may be needed if model is derived from other model
-        if file is not None:
-            file_name = self._getconn.omcpath(file).resolve()
-        else:
-            file_name = None
-        self._file_name = file_name  # Model file/package name
         self._variable_filter = variable_filter
 
-        if self._file_name is not None and not self._file_name.is_file():  # if file does not exist
-            raise IOError(f"{self._file_name} does not exist!")
-
         if self._libraries:
             self._loadLibrary(libraries=self._libraries)
+
+        self._file_name = None
+        if file is not None:
+            file_path = pathlib.Path(file)
+            # special handling for OMCProcessLocal - consider a relative path
+            if isinstance(self._getconn.omc_process, OMCProcessLocal) and not file_path.is_absolute():
+                file_path = pathlib.Path.cwd() / file_path
+            if not file_path.is_file():
+                raise IOError(f"Model file {file_path} does not exist!")
+
+            self._file_name = self.getWorkDirectory() / file_path.name
+            if (isinstance(self._getconn.omc_process, OMCProcessLocal)
+                    and file_path.as_posix() == self._file_name.as_posix()):
+                pass
+            elif self._file_name.is_file():
+                raise IOError(f"Simulation model file {self._file_name} exist - not overwriting!")
+            else:
+                content = file_path.read_text(encoding='utf-8')
+                self._file_name.write_text(content)
+
         if self._file_name is not None:
             self._loadFile(fileName=self._file_name)