feat: add setup-db

setup-db/action.yaml

@@ -0,0 +1,31 @@
+name: "Setup Trivy DB"
+description: "Setup the trivy database, restoring from cache if available"
+author: "Timo Behrendt <t.behrendt@t00n.de"
+branding:
+  icon: "database"
+  color: "blue"
+
+inputs:
+  cache-dir:
+    description: "Path to the Trivy cache directory (default: ~/.cache/trivy)"
+    required: false
+    default: "~/.cache/trivy"
+
+runs:
+  using: "composite"
+  steps:
+    - id: current-date
+      shell: bash
+      run: |
+        echo "current-date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
+    - id: restore-db
+      uses: actions/cache@v4
+      with:
+        path: ${{ inputs.cache-dir }}
+        key: trivy-db-${{ steps.current-date.outputs.current-date }}
+        restore-keys: |
+          trivy-db-${{ steps.current-date.outputs.current-date }}
+          trivy-db-
+    - if: steps.restore-db.outputs.cache-hit != 'true'
+      shell: bash
+      run: trivy fs --download-db-only --cache-dir "${{ inputs.cache-dir }}"