Hoist GH cache clearing into reusable action

Signed-off-by: Hanno Becker <[email protected]>

.github/actions/clear-cache/action.yml

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: Apache-2.0
+
+name: Clear GitHub cache entries
+description: Removes entries from GitHub cache by key
+
+inputs:
+  key_prefix:
+    description: Fixed prefix of ID of Github cache entries that should be removed.
+    required: true
+  repository:
+    description: Name of the repository
+    required: true
+  gh_token:
+    description: Github access token to use
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: List and remove cache entries
+      shell: bash
+      run: |
+        cache_keys=$(gh cache list -R ${{ env.REPO }} -k ${{ inputs.key_prefix }} | cut -f 1)
+        echo "Deleting nix-installer caches..."
+        for key in $cache_keys
+        do
+          gh cache -R ${{ env.REPO }} delete $key || echo "Could not remove $key"
+        done
+      env:
+        GH_TOKEN: ${{ inputs.gh_token }}
+        REPO: ${{ inputs.repository }}

.github/workflows/bench_ec2_reusable.yml

@@ -44,17 +44,13 @@ jobs:
       label: ${{ steps.start-ec2-runner.outputs.label }}
       ec2-instance-id: ${{ steps.start-ec2-runner.outputs.ec2-instance-id }}
     steps:
+      - uses: actions/checkout@v4
       - name: Clear nix-installer action cache
-        run: |
-          cache_keys=$(gh cache list -R ${{ env.REPO }} -k determinatesystem-nix-installer-aarch64-linux | cut -f 1)
-          echo "Deleting nix-installer caches..."
-          for key in $cache_keys
-          do
-            gh cache -R ${{ env.REPO }} delete $key
-          done
-        env:
-          GH_TOKEN: ${{ secrets.AWS_GITHUB_TOKEN }}
-          REPO: ${{ github.repository }}
+        uses: ./.github/actions/clear-cache
+        with:
+           key_prefix: determinatesystem-nix-installer-
+           repository: ${{ github.repository }}
+           token: ${{ secrets.AWS_GITHUB_TOKEN }}
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
@@ -98,10 +94,6 @@ jobs:
         shell: nix develop .#ci -c bash -e {0}
         run: |
           tests bench -c PERF --cflags "${{ inputs.cflags }}" --arch-flags "${{ inputs.archflags }}" -v --output output.json
-      - name: Dump benchmark
-        if: ${{ inputs.store_results != 'true' }}
-        run: |
-          cat output.json
       - name: Store benchmark result
         if: ${{ inputs.store_results == 'true' }}
         uses: benchmark-action/github-action-benchmark@v1