Use hash key for docker layer computed from Dockerfile (#1691)

* Use hash for docker layer
* Remove `layer-` prefix. it gets added by action automatically
* Add requirements file to docker key hash

.github/workflows/ci.yaml

@@ -30,7 +30,12 @@ jobs:
     # In this step, this action saves a list of existing images,
     # the cache is created without them in the post run.
     # It also restores the cache if it exists.
-    - uses: jpribyl/action-docker-layer-caching@v0.1.1
+    - name: Docker layer cache
+      uses: jpribyl/action-docker-layer-caching@v0.1.1
+      with:
+        key: docker-layer-caching-migraphx-${{hashFiles('hip-clang.docker', '**/*requirements.txt', '**/install_prereqs.sh', 'rbuild.ini')}}
+        restore-keys:
+          docker-layer-caching-migraphx-
       # Ignore the failure of a step and avoid terminating the job.
       continue-on-error: true
 
@@ -91,7 +96,12 @@ jobs:
     # In this step, this action saves a list of existing images,
     # the cache is created without them in the post run.
     # It also restores the cache if it exists.
-    - uses: jpribyl/action-docker-layer-caching@v0.1.1
+    - name: Docker layer cache
+      uses: jpribyl/action-docker-layer-caching@v0.1.1
+      with:
+        key: docker-layer-caching-migraphx-${{hashFiles('hip-clang.docker', '**/*requirements.txt', '**/install_prereqs.sh', 'rbuild.ini')}}
+        restore-keys:
+          docker-layer-caching-migraphx-
       # Ignore the failure of a step and avoid terminating the job.
       continue-on-error: true
 
@@ -148,7 +158,12 @@ jobs:
     # In this step, this action saves a list of existing images,
     # the cache is created without them in the post run.
     # It also restores the cache if it exists.
-    - uses: jpribyl/action-docker-layer-caching@v0.1.1
+    - name: Docker layer cache
+      uses: jpribyl/action-docker-layer-caching@v0.1.1
+      with:
+        key: docker-layer-caching-migraphx-${{hashFiles('hip-clang.docker', '**/*requirements.txt', '**/install_prereqs.sh', 'rbuild.ini')}}
+        restore-keys:
+          docker-layer-caching-migraphx-
       # Ignore the failure of a step and avoid terminating the job.
       continue-on-error: true
 

.github/workflows/clean-closed-pr-caches.yaml

@@ -19,7 +19,7 @@ jobs:
           BRANCH="refs/pull/${{ github.event.pull_request.number }}/merge"
 
           echo "Fetching list of cache key"
-          cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1 )
+          cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH | cut -f 1 | tail -n +3)
 
           ## Setting this to not fail the workflow while deleting cache keys. 
           set +e