Add export unit test CI workflow

Summary:

Test Plan:

Reviewers:

Subscribers:

Tasks:

Tags:

.github/workflows/export.yaml

@@ -0,0 +1,43 @@
+name: Export
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+concurrency:
+  group: unit-test${{ github.workflow }}-${{ github.ref == 'refs/heads/main' && github.run_number || github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash -l -eo pipefail {0}
+
+jobs:
+  unit_tests:
+    if: github.repository_owner == 'pytorch'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.9', '3.10', '3.11']
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v3
+      - name: Setup conda env
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          miniconda-version: "latest"
+          activate-environment: test
+          python-version: ${{ matrix.python-version }}
+      - name: Update pip
+        run: python -m pip install --upgrade pip
+      - name: Install dependencies
+        run: |
+          bash torchtune/modules/_export/install_requirements.sh
+          python -m pip install torchao
+          python -m pip install -e ".[dev]"
+      - name: Run unit tests with coverage
+        run: pytest tests --cov=. --cov-report=xml --durations=20 -vv
+      - name: Upload Coverage to Codecov
+        uses: codecov/codecov-action@v3

.github/workflows/unit_test.yaml

@@ -34,9 +34,7 @@ jobs:
         run: python -m pip install --upgrade pip
       - name: Install dependencies
         run: |
-          NIGHTLY_VERSION=dev20241121
-          python -m pip install torch=="2.6.0.${NIGHTLY_VERSION}" torchvision=="0.20.0.${NIGHTLY_VERSION}" --extra-index-url https://download.pytorch.org/whl/nightly/cpu
-          python -m pip install torchao
+          python -m pip install torch torchvision torchao
           python -m pip install -e ".[dev]"
       - name: Run unit tests with coverage
         run: pytest tests --cov=. --cov-report=xml --durations=20 -vv

torchtune/modules/_export/install_requirements.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+NIGHTLY_VERSION="dev20241121"
+
+# Install pytorch nightly for export-friendly modules to run.
+pip install torch==2.6.0.${NIGHTLY_VERSION} torchvision==0.20.0.${NIGHTLY_VERSION} --extra-index-url https://download.pytorch.org/whl/nightly/cpu