CT 2516 ensure that paths in Jinja context flags object are strings (#…

…7678)

(cherry picked from commit 0516192)

.changes/unreleased/Fixes-20230522-135007.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Stringify flag paths for Jinja context
+time: 2023-05-22T13:50:07.897354-04:00
+custom:
+  Author: gshank
+  Issue: "7495"

core/dbt/flags.py

@@ -3,6 +3,7 @@
 from argparse import Namespace
 from multiprocessing import get_context
 from typing import Optional
+from pathlib import Path
 
 
 # for setting up logger for legacy logger
@@ -95,6 +96,8 @@ def get_flag_dict():
 def get_flag_obj():
     new_flags = Namespace()
     for key, val in get_flag_dict().items():
+        if isinstance(val, Path):
+            val = str(val)
         setattr(new_flags, key.upper(), val)
     # The following 3 are CLI arguments only so they're not full-fledged flags,
     # but we put in flags for users.