Error out if git symlink not enabled on Windows

[larryliu0820]

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'

This is because we are not enabling symlink in git.

Need to run:

 git config --global core.symlinks true

and reclone the repo.

This PR fails the installation when that happens.

[pytorch-bot]

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❌ 3 New Failures, 3 Unrelated Failures

As of commit 2ebc280 with merge base 9a7882e ():

NEW FAILURES - The following jobs have failed:

• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, non-quantized) / linux-job (gh)
  RuntimeError: Command docker exec -t d7eb979895404e22d74f49d5b6f5354069f80c96eaed3b3e227422bbe3ffa430 /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 147e06f2e7c5290b831d50d038e8e5dd1185e6d788212a8436728add0cb1652b /exec failed with exit code 1
• Test CUDA Builds / export-model-cuda-artifact (openai, whisper-large-v3-turbo, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t df223b44211239cc67bfeb343161adad315f670bfd1e71d5c5141dee0275f90c /exec failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Test CUDA Builds / test-models-cuda (resnet18) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

BROKEN TRUNK - The following jobs failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / windows / windows-job (gh) (trunk failure)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq

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[mergennachin]

@GregoryComer @larryliu0820 cherry-pickable to 1.0.1?

[larryliu0820]

Oops this patch doesn't fix the underlying problem. If we don't turn on symlink on windows: git config --global core.symlinks true, then the wheel doesn't have all the python files such as exir/backend/:

PS C:\executorch> tar -tf ".\dist\executorch-1.1.0a0+a6b20e6-cp312-cp312-win_amd64.whl" | Select-String exir

executorch/exir/_serialize/program.fbs
executorch/exir/_serialize/scalar_type.fbs

Probably will abandon this.

[GregoryComer]

@GregoryComer @larryliu0820 cherry-pickable to 1.0.1?

Following up on Mengwei's comment, I had a task for 1.0 to at least catch this any maybe try to automatically fix the symlinks. I dropped it from release blockers due to priorities, but I'll pull it into 1.0.1.

[larryliu0820]

I updated the PR to error out in install_executorch.bat when symlink is not enabled on the environment.

[GregoryComer]

Thanks for adding this. Looks good to me.