ci: Purge old cached assets in workflows (#437)

* ci: Add automated branch cache cleanup

* Add manual cache purge

* Split actions and cache cleaning

.github/workflows/cleanup.yml → .github/workflows/cleanup-actions.yml

@@ -1,4 +1,4 @@
-name: "Cleanup"
+name: "Cleanup - Actions"
 on:
   workflow_dispatch:
     inputs:
@@ -30,7 +30,7 @@ on:
 
 jobs:
 
-  del-runs:
+  delete-runs:
     name: "Delete old workflow runs"
     runs-on: ubuntu-latest
 
@@ -43,4 +43,3 @@ jobs:
           keep_minimum_runs: ${{ github.event.inputs.minimum_runs }}
           delete_workflow_pattern: ${{ github.event.inputs.delete_workflow_pattern }}
           delete_workflow_by_state_pattern: ${{ github.event.inputs.delete_workflow_by_state_pattern }}
-

.github/workflows/cleanup-cache.yml

@@ -0,0 +1,21 @@
+name: "Cleanup - Cache"
+on:
+  workflow_dispatch:
+    inputs:
+      dry-run:
+        description: "Dry run only?"
+        required: true
+        type: boolean
+        default: false
+
+jobs:
+
+  delete-caches:
+    name: "Delete Actions caches"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: "Wipe Github Actions cache"
+        uses: easimon/wipe-cache@v1
+        with:
+          dry-run: ${{ github.event.inputs.dry-run }}

.github/workflows/release.yml

@@ -128,3 +128,17 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=min
+
+  cache-purge:
+    name: "Purge branch Actions cache"
+    needs: [release-binary, release-docker]
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - name: "Delete Branch Cache Action"
+        uses: snnaplab/delete-branch-cache-action@v1.0.0
+        with:
+          # Specify explicitly because the ref at the time of merging will be a branch name such as 'main', 'develop'
+          ref: refs/pull/${{ github.event.number }}/merge
+          github-token: ${{ secrets.GITHUB_TOKEN }}