Add check image exists

.github/workflows/verify-rp.yml

@@ -1,11 +1,11 @@
-name: Verify Format
+name: Verify PR
 
 on:
   pull_request:
     branches: [main]
 
 jobs:
-  Patch:
+  Check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -15,3 +15,6 @@ jobs:
       - name: Verify mirror.txt
         run: |
           ./hack/verify-fmt.sh mirror.txt || { echo "Please run './hack/fmt.sh mirror.txt'"; exit 1; }
+      - name: Verify Image Exists
+        run: |
+          ./hack/verify-image.sh https://github.com/${{ github.repository }}/pull/${{ github.event.pull_request.number }}.patch

hack/verify-image.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+patch_url=$1
+
+file=mirror.txt
+
+cp "${file}" "${file}.bak"
+
+git apply -R <(curl -fsSL "${patch_url}")
+
+list=$(diff --unified "${file}" "${file}.bak" | grep -e '^+\w' | sed 's/^+//')
+
+for image in ${list}; do
+    skopeo inspect --raw "docker://${image}" || { echo "Not Found ${image}" ; exit 1; }
+done