feat: Add OpenShift 4.18 schema (#160)

Author: porridge

README.md

@@ -31,6 +31,7 @@ server:
   - kubernetes-1.20.2
   - openshift-3.11.0
   - openshift-4.1.0
+  - openshift-4.18
   - com.coreos
   availableSchemas: [] # openAPI schema to validate against, i.e. to validate if rendered objects could be applied
   objects: # objects visible to Helm's k8s client, for example via the `lookup` function

internal/schemas/openapi-schemas/README.md

@@ -2,6 +2,11 @@
 
 - OpenShift 3.11 schema source: https://github.com/garethr/openshift-json-schema/blob/master/v3.11.0/_definitions.json
 - OpenShift 4.1 schema source: https://github.com/garethr/openshift-json-schema/blob/master/v4.1.0/_definitions.json
+- OpenShift 4.18 schema source:
+  - Install openshift
+  - `oc get --raw /openapi/v2 | jq --sort-keys 'del(.parameters, .paths[], .security, .securityDefinitions)'  > openshift-${version}.json`
+  - Update the `.info` in the resulting file
+  - `gzip -9 openshift-${version}.json`
 
 ## Adhoc generation
 
@@ -22,4 +27,4 @@ with an addition of a "x-kubernetes-group-version-kind" to map to the API ref:
     "version": "v1"
   }
 ]
-```
+```

internal/schemas/openapi-schemas/openshift-4.18.json.gz

@@ -11,6 +11,7 @@ func TestSchemas(t *testing.T) {
 		"kubernetes-1.20.2",
 		"openshift-3.11.0",
 		"openshift-4.1.0",
+		"openshift-4.18",
 		"com.coreos",
 	}