check-remote-image-existence.yml: check remote image existence in templates

.github/workflows/check-remote-image-existence.yml

@@ -0,0 +1,20 @@
+name: Check Remote Image Existence
+
+on:
+  pull_request:
+    paths:
+    - 'examples/**.yaml'
+    - 'hack/test-templates/**.yaml'
+    - 'hack/check-remote-image-existence.sh'
+
+jobs:
+  check-remote-image-existence:
+    name: Check Remote Image Existence
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Run check-remote-image-existence.sh
+      run: ./hack/check-remote-image-existence.sh

hack/check-remote-image-existence.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -eu -o pipefail
+
+# Get the directory of the script
+script_dir=$(dirname "$0")
+
+result=0
+for template in $(realpath "${script_dir}"/../examples/*.yaml "${script_dir}"/./test-templates/*.yaml | sort -u); do
+	for location in $(yq eval '.images[].location' "${template}"); do
+		if [[ ${location} == http* ]]; then
+			response=$(curl -L -s -I -o /dev/null -w "%{http_code}" "${location}")
+			if [[ ${response} != "200" ]]; then
+				line=$(grep -n "${location}" "${template}" | cut -d ':' -f 1)
+				echo "::error file=${template},line=${line}::response: ${response} for ${location}"
+				result=1
+			else
+				echo "response: ${response} for ${location}"
+			fi
+		fi
+	done
+done
+
+exit "${result}"