[WIP] Testing m1 build

.github/workflows/build-on-m1.yml

@@ -0,0 +1,33 @@
+name: Build on M1
+on:
+  pull_request
+jobs:
+  build_vision:
+    runs-on: macos-m1-11
+    strategy:
+      matrix:
+        py_vers: [ "3.8", "3.9", "3.10" ]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Build TorchVision M1 wheel
+        shell: arch -arch arm64 bash {0}
+        env:
+          ENV_NAME: conda-env-${{ github.run_id }}
+          PY_VERS: ${{ matrix.py_vers }}
+        run: |
+          source ~/miniconda3/etc/profile.d/conda.sh
+          set -ex
+          conda create -yp ${ENV_NAME} python=${PY_VERS} numpy libpng openjpeg wheel pkg-config
+          conda run -p ${ENV_NAME} python3 -c "import os;print(os.__file__)"
+          conda run -p ${ENV_NAME} python3 -mpip install torch --extra-index-url=https://download.pytorch.org/whl/nightly torch
+          conda run -p ${ENV_NAME} python3 -mpip install delocate
+          conda run -p ${ENV_NAME} python3 setup.py bdist_wheel
+          conda env remove -p ${ENV_NAME}
+      - name: Upload TorchVision wheel
+        uses: seemethere/upload-artifact-s3@v4
+        with:
+          name: torchvision-py${{ matrix.py_vers }}-macos11-m1
+          path: dist/
+          s3-bucket: gha-artifacts
+          region: us-east-1