added function which returns arguments for pype subprocess

pype/lib/execute.py

@@ -133,3 +133,26 @@ def run_subprocess(*args, **kwargs):
         raise RuntimeError(exc_msg)
 
     return full_output
+
+
+def get_pype_execute_args():
+    """Arguments to run pype command.
+
+    Arguments for subprocess when need to spawn new pype process. Which may be
+    needed when new python process for pype scripts must be executed in build
+    pype.
+
+    ## Why is this needed?
+    Pype executed from code has different executable set to virtual env python
+    and must have path to script as first argument which is not needed for
+    build pype.
+    """
+    pype_executable = os.environ["PYPE_EXECUTABLE"]
+    args = [pype_executable]
+
+    executable_filename = os.path.dirname(pype_executable)
+    if "python" in executable_filename.lower():
+        args.append(
+            os.path.join(os.environ["PYPE_ROOT"], "start.py")
+        )
+    return args