Mantain mirror (#795)

hack/merge-mirror.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+base_list="${1}"
+used_list="${2}"
+used_top="${3:-100}"
+
+function used_top() {
+    cat "${used_list}" | head -n "${used_top}"
+}
+
+function intersection_used() {
+    sort "${base_list}" "${used_list}" | uniq -d
+}
+
+function fixed_docker() {
+    grep "^docker\.io/library/" "${base_list}"
+    grep "^docker\.io/library/" "${used_list}"
+}
+
+function fixed_k8s() {
+    grep "^registry\.k8s\.io/" "${base_list}"
+    grep "^registry\.k8s\.io/" "${used_list}"
+}
+
+function fixed_istio() {
+    grep "^docker\.io/istio/" "${base_list}"
+    grep "^docker\.io/istio/" "${used_list}"
+}
+
+cat <(used_top) \
+    <(intersection_used) \
+    <(fixed_docker) \
+    <(fixed_k8s) | sort | uniq -u