Calculate short SHA using parameter expansion

.github/workflows/cpu-tests.yml

@@ -234,10 +234,10 @@ jobs:
   #    ((contains(github.ref_name, 'develop') || contains(github.ref_name, 'master')) && needs.build-docker-image-cpu.outputs.docker-tag != 'latest')
   #    || startsWith(github.ref, 'refs/tags/')
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: '1'
+      # name: Check out repository
+      #  uses: actions/checkout@v4
+      #  with:
+      #    fetch-depth: '1'
 
       - name: "Prepare environment: Restore cache"
         if: env.DOCKER_TAG != 'latest'
@@ -259,8 +259,11 @@ jobs:
         run: |
           # Execute on change of Docker image
           if [[ "$DOCKER_TAG" == 'latest' ]]; then
-            GIT_SHA=${GITHUB_REF_NAME}-$(git rev-parse --short "$GITHUB_SHA")
-            echo "GIT_SHA=$GIT_SHA"
+            #      GIT_SHA=${GITHUB_REF_NAME}-$(git rev-parse --short "$GITHUB_SHA")
+            #      echo "GIT_SHA=$GIT_SHA"
+            echo "SHELL=$SHELL"
+            echo "GITHUB_SHA=$GITHUB_SHA"
+            echo "GITHUB_SHORT_SHA=${GITHUB_SHA:0:7}"
 
             docker tag $IMAGE_NAME:$GITHUB_RUN_ID $IMAGE_REPO/$IMAGE_NAME:latest
             docker tag $IMAGE_NAME:$GITHUB_RUN_ID $IMAGE_REPO/$IMAGE_NAME:$GIT_SHA