Update flaskr-ci.yaml

.github/workflows/flaskr-ci.yaml

@@ -37,21 +37,23 @@ jobs:
       # Required permission to push images with the built-in GITHUB_TOKEN
       packages: write
     runs-on: ubuntu-latest
+    env:
+      CACHE: "${{ runner.temp }}/.buildx-cache"
+      NEW_CACHE: "${{ runner.temp }}/.buildx-cache-new"
     steps:
       - uses: actions/checkout@v3
-      - name: Set job vars
+      - name: Job vars and prep
         id: vars
         run: |
           echo "SHA_SHORT=${GITHUB_SHA:0:10}" >> ${GITHUB_ENV}
           echo "REPO_LOWER_CASE=${GITHUB_REPOSITORY,,}" >> ${GITHUB_ENV}
-      # This is a separate action that sets up buildx runner
-      - name: Set up Docker Buildx
+          mkdir -p ${CACHE}
+      - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v1
-      # So now you can use Actions' own caching!
-      - name: Cache Docker layers
+      - name: Setup cache for Docker Buildx
         uses: actions/cache@v2
         with:
-          path: /tmp/.buildx-cache
+          path: ${{ env.CACHE }}
           key: flaskr-buildx-${{ github.ref_name }}
           restore-keys: |
             flaskr-buildx-main
@@ -68,8 +70,8 @@ jobs:
           push: true
           # tags: "ghcr.io/${{ github.repository }}:${{ steps.vars.outputs.sha_short }}"
           tags: "ghcr.io/${{ env.REPO_LOWER_CASE }}:${{ env.SHA_SHORT }}"
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache-new
+          cache-from: type=local,src=${{ env.CACHE }}
+          cache-to: type=local,dest=${{ env.NEW_CACHE }}
         # This ugly bit is necessary if you don't want your cache to grow forever
         # until it hits GitHub's limit of 5GB.
         # Temp fix
@@ -77,5 +79,5 @@ jobs:
         # https://github.com/moby/buildkit/issues/1896
       - name: Move cache
         run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+          rm -rf $CACHE
+          mv $NEW_CACHE $CACHE