use alternative checkout

Author: nschloe

.github/workflows/ci.yml

@@ -26,23 +26,8 @@ jobs:
         with:
           python-version: "3.x"
 
-      # Don't use lfs directly, but cache the lfs results.
-      # See <https://github.com/actions/checkout/issues/165#issuecomment-657673315>.
       - name: Checkout code
-        uses: actions/checkout@v2
-        # with:
-        #   lfs: true
-      - name: Create LFS file list
-        run: git lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id
-      - name: Restore LFS cache
-        uses: actions/cache@v2
-        id: lfs-cache
-        with:
-          path: .git/lfs
-          # key should be the same for all operating systems
-          key: lfs-${{ hashFiles('.lfs-assets-id') }}-v1
-      - name: Git LFS Pull
-        run: git lfs pull
+        uses: nschloe/action-cached-lfs-checkout@v1
 
       - name: Install CGAL 5
         run: |
@@ -67,23 +52,8 @@ jobs:
         with:
           python-version: "3.x"
 
-      # Don't use lfs directly, but cache the lfs results.
-      # See <https://github.com/actions/checkout/issues/165#issuecomment-657673315>.
       - name: Checkout code
-        uses: actions/checkout@v2
-        # with:
-        #   lfs: true
-      - name: Create LFS file list
-        run: git lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id
-      - name: Restore LFS cache
-        uses: actions/cache@v2
-        id: lfs-cache
-        with:
-          path: .git/lfs
-          # key should be the same for all operating systems
-          key: lfs-${{ hashFiles('.lfs-assets-id') }}-v1
-      - name: Git LFS Pull
-        run: git lfs pull
+        uses: nschloe/action-cached-lfs-checkout@v1
 
       - name: Install system dependencies
         run: |