OCPBUGS-48244: ztp: ci check to ensure source-cr filenames are within 255 limit

ztp/Makefile

@@ -1,6 +1,6 @@
-.PHONY: ci-job test-policygen checkExtraManifests checkSourceCRsAnnotation test-policygen-kustomize test-siteconfig test-siteconfig-kustomize test-acm-ztp-generated-policies check-reference
+.PHONY: ci-job test-policygen checkExtraManifests checkSourceCRsAnnotation test-policygen-kustomize test-siteconfig test-siteconfig-kustomize test-acm-ztp-generated-policies check-reference checkSourceCRsPath
 
-ci-job: test-policygen checkExtraManifests checkSourceCRsAnnotation test-policygen-kustomize test-siteconfig test-siteconfig-kustomize test-acm-ztp-generated-policies check-reference
+ci-job: test-policygen checkExtraManifests checkSourceCRsAnnotation test-policygen-kustomize test-siteconfig test-siteconfig-kustomize test-acm-ztp-generated-policies check-reference checkSourceCRsPath
 
 test-policygen:
 	@echo "ZTP: Build policy generator and run test"
@@ -19,6 +19,28 @@ checkSourceCRsAnnotation:
 		fi; \
 	done; \
 
+
+
+# ZTP_HOME is a temporary hard-coded path to site-generate container's ztp folder
+# Should remain consistent across upstream, midstream and CI script
+# https://github.com/openshift-kni/cnf-features-deploy/blob/master/ztp/resource-generator/Containerfile#L28C1-L28C23
+ZTP_HOME=/home/ztp/
+SOURCE_CRS := source-crs
+# checkSourceCRsPath CI Job is to ensure source crs path length do not exceed 255 characters
+# Related Issue: https://issues.redhat.com/browse/OCPBUGS-48244
+checkSourceCRsPath:
+	@failures=0; \
+	for cr in $(shell find $(SOURCE_CRS) -type f); do \
+	  path_length=$$(echo -n ${ZTP_HOME}$$cr | wc -c); \
+	  if [ $$path_length -gt 255 ]; then \
+	    echo "File path too long: $$cr (length: $$path_length)"; \
+		(( failures += 1 )); \
+	  else \
+	    echo "File path OK: ${ZTP_HOME}$$cr (length: $$path_length)"; \
+	  fi; \
+	done; \
+	exit $$failures
+
 test-policygen-kustomize:
 	@echo "ZTP: Build policy generator kustomize plugin and run test"
 	$(MAKE) -C ./policygenerator-kustomize-plugin test

ztp/README.md

@@ -25,3 +25,7 @@ We suggest breaking down the site plan into components that are common, relevant
 * Site: IP addresses, SRIOV configuration
 
 We look forward to user feedback and will gladly accept pull requests and issues for consideration.
+
+## ZTP Guidelines
+
+To avoid issues due to filename length limitations (ISO standard: not greater than 255), please ensure files in the source-crs folder are within this limit. This includes the length of the full path as per ZTP_HOME set in the ztp-site-generate container.