Merge pull request #18061 from prometheus/superq/enforce_go_mod_version

Add CI check for Go version support

scripts/check-go-mod-version.sh

@@ -1,4 +1,41 @@
 #!/usr/bin/env bash
+#
+# Description: Validate `go` directive in various Go mod files.
+
+set -u -o pipefail
+
+echo "Checking version support"
+
+version_url='https://go.dev/dl/?mode=json'
+get_supported_version() {
+  curl -s -f "${version_url}" \
+    | jq -r '.[].version' \
+    | sed 's/^go//' \
+    | cut -f2 -d'.' \
+    | sort -V \
+    | head -n1
+}
+
+get_current_version() {
+  awk '$1 == "go" {print $2}' go.mod \
+    | cut -f2 -d'.'
+}
+
+supported_version="$(get_supported_version)"
+if [[ "${supported_version}" -le 0 ]]; then
+  echo "Error getting supported version from '${version_url}'"
+  exit 1
+fi
+current_version="$(get_current_version)"
+if [[ "${current_version}" -le 0 ]]; then
+  echo "Error getting current version from go.mod"
+  exit 1
+fi
+
+if [[ "${current_version}" -gt "${supported_version}" ]] ; then
+   echo "Go mod version (1.${current_version}) is newer than upstream supported version (1.${supported_version})"
+   exit 1
+fi
 
 readarray -t mod_files < <(git ls-files go.mod go.work '*/go.mod' || find . -type f -name go.mod -or -name go.work)