Added a new target make check-generate to Makefile

.ci/check

@@ -49,5 +49,9 @@ echo "Running golangci-lint..."
 # golangci-lint can't be run from outside the directory
 (cd ${SOURCE_PATH} && golangci-lint run -c .golangci.yaml --timeout 10m)
 
+echo "Running check-generate..."
+make check-generate
+
 # Run Static Application Security Testing (SAST) using gosec
+echo "Running SAST..."
 make sast-report

Makefile

@@ -176,6 +176,10 @@ generate: $(VGOPATH) $(DEEPCOPY_GEN) $(DEFAULTER_GEN) $(CONVERSION_GEN) $(OPENAP
 	@./hack/generate-code
 	@./hack/api-reference/generate-spec-doc.sh
 
+.PHONY: check-generate
+check-generate:
+	@./hack/check-generate.sh
+
 .PHONY: add-license-headers
 add-license-headers: $(GO_ADD_LICENSE)
 	@./hack/add_license_headers.sh

hack/check-generate.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+#
+# SPDX-FileCopyrightText: SAP SE or an SAP affiliate company and Gardener contributors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+set -e
+
+echo "> Generate"
+
+check_branch="__check"
+stashed=false
+checked_out=false
+generated=false
+
+function delete-check-branch {
+  git rev-parse --verify "$check_branch" &>/dev/null && git branch -q -D "$check_branch" || :
+}
+
+function cleanup {
+  if [[ "$generated" == true ]]; then
+    if ! clean_err="$(make clean && git reset --hard -q && git clean -qdf)"; then
+      echo "Could not clean: $clean_err"
+    fi
+  fi
+
+  if [[ "$checked_out" == true ]]; then
+    if ! checkout_err="$(git checkout -q -)"; then
+      echo "Could not checkout to previous branch: $checkout_err"
+    fi
+  fi
+
+  if [[ "$stashed" == true ]]; then
+    if ! stash_err="$(git stash pop -q)"; then
+      echo "Could not pop stash: $stash_err"
+    fi
+  fi
+
+  delete-check-branch
+}
+
+trap cleanup EXIT SIGINT SIGTERM
+
+if which git &>/dev/null; then
+  git config --global user.name 'Gardener'
+  git config --global user.email 'gardener@cloud'
+  if ! git rev-parse --git-dir &>/dev/null; then
+    echo "Not a git repo, aborting"
+    exit 1
+  fi
+
+  if [[ "$(git rev-parse --abbrev-ref HEAD)" == "$check_branch" ]]; then
+    echo "Already on check branch, aborting"
+    exit 1
+  fi
+  delete-check-branch
+
+  if [[ "$(git status -s)" != "" ]]; then
+    stashed=true
+    git stash --include-untracked -q
+    git stash apply -q &>/dev/null
+  fi
+
+  checked_out=true
+  git checkout -q -b "$check_branch"
+  git add --all
+  git commit -q --allow-empty -m 'checkpoint'
+
+  old_status="$(git status -s)"
+
+  if ! out=$(rm -rf hack/tools/bin/* 2>&1); then
+    echo "Error while cleaning hack/tools/bin/: $out"
+    exit 1
+  fi
+
+  echo ">> make generate"
+  generated=true
+  if ! out=$(make generate 2>&1); then
+    echo "Error during calling make generate: $out"
+    exit 1
+  fi
+  new_status="$(git status -s)"
+
+  if [[ "$old_status" != "$new_status" ]]; then
+    echo "make generate needs to be run:"
+    echo "$new_status"
+    exit 1
+  fi
+
+  echo ">> make tidy"
+  if ! out=$(make tidy 2>&1); then
+    echo "Error during calling make tidy: $out"
+    exit 1
+  fi
+  new_status="$(git status -s)"
+
+  if [[ "$old_status" != "$new_status" ]]; then
+    echo "make tidy needs to be run:"
+    echo "$new_status"
+    exit 1
+  fi
+else
+  echo "No git detected, cannot run make check-generate"
+fi
+exit 0