From ca31e4cddfcaf4ee573ff1652cd14bbbd76b269d Mon Sep 17 00:00:00 2001
From: Mengwei Liu <larryliu@meta.com>
Date: Fri, 7 Nov 2025 13:28:25 -0800
Subject: [PATCH 1/2] Fix windows build cannot find versions.py

When I install executorch on windows I run into this error:   error:
[Errno 2] No such file or directory:
'pip-out\\lib.win-amd64-cpython-312\\executorch\\version.py'

It turns out sometimes the dst directory (in this case
pip-out\lib.win-amd64-cpython-312\executorch) is not installed before we
write version.py into it. This PR adds a mkpath call to make sure it's
always there.
---
 setup.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/setup.py b/setup.py
index 45b69b8b828..62eed183cae 100644
--- a/setup.py
+++ b/setup.py
@@ -635,6 +635,9 @@ def run(self):
             dst_root = self.get_package_dir(".")
         else:
             dst_root = os.path.join(self.build_lib, "executorch")
+            # On Windows the package directory might not exist yet when building from a
+            # clean tree. Ensure it is created before we attempt to write version.py.
+            self.mkpath(dst_root)
         # Create the version file.
         Version.write_to_python_file(os.path.join(dst_root, "version.py"))
 

From 2ebc280333e26bf4a2eeb377f63c6f9c60e1ae1f Mon Sep 17 00:00:00 2001
From: Mengwei Liu <larryliu@meta.com>
Date: Fri, 7 Nov 2025 14:53:37 -0800
Subject: [PATCH 2/2] Exit if symlink is not enabled on Windows

---
 install_executorch.bat | 18 +++++++++++++++++-
 setup.py               |  3 ---
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/install_executorch.bat b/install_executorch.bat
index e6d5c5db363..50fb6fd9b77 100644
--- a/install_executorch.bat
+++ b/install_executorch.bat
@@ -1,4 +1,5 @@
 @ECHO OFF
+setlocal EnableDelayedExpansion
 
 rem Copyright (c) Meta Platforms, Inc. and affiliates.
 rem All rights reserved.
@@ -7,9 +8,24 @@ rem This batch file provides a basic functionality similar to the bash script.
 
 cd /d "%~dp0"
 
+rem Verify that Git checked out symlinks correctly. Without this the Python install
+rem will fail when attempting to copy files from src\executorch.
+where git >NUL 2>&1
+if not errorlevel 1 (
+    set "GIT_SYMLINKS="
+    for /f "usebackq delims=" %%i in (`git config --get core.symlinks 2^>nul`) do set "GIT_SYMLINKS=%%i"
+    if /I not "!GIT_SYMLINKS!"=="true" (
+        echo ExecuTorch requires Git symlink support on Windows.
+        echo Enable Developer Mode and run: git config --global core.symlinks true
+        echo Re-clone the repository after enabling symlinks, then rerun install_executorch.bat.
+        exit /b 1
+    )
+)
+
 rem Under windows, it's always python
 set PYTHON_EXECUTABLE=python
 
 "%PYTHON_EXECUTABLE%" install_executorch.py %*
 
-exit /b %ERRORLEVEL%
+set "EXIT_CODE=%ERRORLEVEL%"
+endlocal & exit /b %EXIT_CODE%
diff --git a/setup.py b/setup.py
index 62eed183cae..45b69b8b828 100644
--- a/setup.py
+++ b/setup.py
@@ -635,9 +635,6 @@ def run(self):
             dst_root = self.get_package_dir(".")
         else:
             dst_root = os.path.join(self.build_lib, "executorch")
-            # On Windows the package directory might not exist yet when building from a
-            # clean tree. Ensure it is created before we attempt to write version.py.
-            self.mkpath(dst_root)
         # Create the version file.
         Version.write_to_python_file(os.path.join(dst_root, "version.py"))