Cache model workflow (#394)

* Add workflow that caches the model, step 1 for CI

* Change name of workflow job

Co-authored-by: James Reynolds <magnsuviri@me.com>
Co-authored-by: Lincoln Stein <lincoln.stein@gmail.com>

.github/workflows/cache-model.yml

@@ -0,0 +1,64 @@
+name: Cache Model
+on:
+  workflow_dispatch
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ macos-12 ]
+    name: Create Caches using ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+      - name: Cache model
+        id: cache-sd-v1-4
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-sd-v1-4
+        with:
+          path: models/ldm/stable-diffusion-v1/model.ckpt
+          key: ${{ env.cache-name }}
+          restore-keys: |
+            ${{ env.cache-name }}
+      - name: Download Stable Diffusion v1.4 model
+        if: ${{ steps.cache-sd-v1-4.outputs.cache-hit != 'true' }}
+        continue-on-error: true
+        run: |
+          if [ ! -e models/ldm/stable-diffusion-v1 ]; then
+              mkdir -p models/ldm/stable-diffusion-v1
+          fi
+          if [ ! -e models/ldm/stable-diffusion-v1/model.ckpt ]; then
+            curl -o models/ldm/stable-diffusion-v1/model.ckpt ${{ secrets.SD_V1_4_URL }}
+          fi
+# Uncomment this when we no longer make changes to environment-mac.yaml
+#       - name: Cache environment
+#         id: cache-conda-env-ldm
+#         uses: actions/cache@v3
+#         env:
+#           cache-name: cache-conda-env-ldm
+#         with:
+#           path: ~/.conda/envs/ldm
+#           key: ${{ env.cache-name }}
+#           restore-keys: |
+#             ${{ env.cache-name }}
+      - name: Install dependencies
+#         if: ${{ steps.cache-conda-env-ldm.outputs.cache-hit != 'true' }}
+        run: |
+          conda env create -f environment-mac.yaml
+      - name: Cache hugginface and torch models
+        id: cache-hugginface-torch
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-hugginface-torch
+        with:
+          path: ~/.cache
+          key: ${{ env.cache-name }}
+          restore-keys: |
+            ${{ env.cache-name }}
+      - name: Download Huggingface and Torch models
+        if: ${{ steps.cache-hugginface-torch.outputs.cache-hit != 'true' }}
+        continue-on-error: true
+        run: |
+          export PYTHON_BIN=/usr/local/miniconda/envs/ldm/bin/python
+          $PYTHON_BIN scripts/preload_models.py