Update win32 build for conf.py change

Author: kaiw

setup.cfg

@@ -26,4 +26,4 @@ order_by_type = True
 use_parentheses = True
 indent = 4
 include_trailing_comma = True
-skip = bin/meld
+skip = bin/meld, setup_win32.py

setup_win32.py

@@ -2,15 +2,13 @@
 
 import glob
 import os.path
+import pathlib
 import platform
 import sys
 import sysconfig
 
 from cx_Freeze import Executable, setup
 
-import meld.build_helpers
-import meld.conf
-
 
 def get_non_python_libs():
     """Returns list of tuples containing extra dependencies required to run
@@ -125,6 +123,18 @@ def get_non_python_libs():
          "shortcutDir": "ProgramMenuFolder",
     })
 
+# Copy conf.py in place if necessary
+base_path = pathlib.Path(__file__).parent
+conf_path = base_path / 'meld' / 'conf.py'
+
+if not conf_path.exists():
+    import shutil
+    shutil.copyfile(conf_path.with_suffix('.py.in'), conf_path)
+
+import meld.build_helpers  # noqa: E402
+import meld.conf  # noqa: E402
+
+
 setup(
     name="Meld",
     version=meld.conf.__version__,