Add post_read custom_code

mmv1/api/resource/custom_code.go

@@ -89,6 +89,10 @@ type CustomCode struct {
 	// in the Read function.
 	PreRead string `yaml:"pre_read"`
 
+	// This code is run after Read calls happen.  It's placed in the
+	// Read function and also after the nested_query read call.
+	PostRead string `yaml:"post_read"`
+
 	// This code is run before the Update call happens.  It's placed
 	// in the Update function, just after the encoder call, before
 	// the Update call.  Just like the encoder, it is only used if

mmv1/products/accesscontextmanager/ServicePerimeterResource.yaml

@@ -68,6 +68,7 @@ nested_query:
   modify_by_patch: true
 custom_code:
   custom_import: 'templates/terraform/custom_import/access_context_manager_service_perimeter_resource.go.tmpl'
+  post_read: 'templates/terraform/post_read/access_context_manager_service_perimeter_resource.go.tmpl'
 exclude_tgc: true
 # Skipping the sweeper due to the non-standard base_url and because this is fine-grained under ServicePerimeter
 exclude_sweeper: true

mmv1/templates/terraform/nested_query.go.tmpl

@@ -243,6 +243,9 @@ func resource{{ $.ResourceName }}ListForPatch(d *schema.ResourceData, meta inter
     return nil, err
   }
 
+{{- if $.CustomCode.PostRead }}
+  {{ $.CustomTemplate $.CustomCode.PostRead false -}}
+{{- end }}
   var v interface{}
   var ok bool
 {{- range $i, $k := $.NestedQuery.Keys }}

mmv1/templates/terraform/post_read/access_context_manager_service_perimeter_resource.go.tmpl

@@ -0,0 +1,4 @@
+// post_read template for access_context_manager_service_perimeter_resource
+
+// this is a placeholder for now but in the future we can use this to access
+// the etag from the read response

mmv1/templates/terraform/resource.go.tmpl

@@ -574,6 +574,9 @@ func resource{{ $.ResourceName -}}Read(d *schema.ResourceData, meta interface{})
         return transport_tpg.HandleNotFoundError(err, d, fmt.Sprintf("{{ $.ResourceName }} %q", d.Id()))
 {{- end}}
     }
+{{- if $.CustomCode.PostRead }}
+    {{ $.CustomTemplate $.CustomCode.PostRead false -}}
+{{- end }}
 
 {{if $.NestedQuery -}}
     res, err = flattenNested{{ $.ResourceName -}}(d, meta, res)