merge bundle files

[mike-sirs]

Hi
When using the following approach I receive the error

bundle.instances."demo-app".namespace: reference "_defaults" not found:
    ./0.demo-app.cue.cue:12:15

file: _default.cue

bundle: {
    _env:     string @timoni(runtime:string:ENV)
	_defaults: {
		namespace: "demo-app"
		if _env == "dev" {
		    spot:      true
			node_env:  "development"
		}
		if _env == "prd" {
		    spot:      false
			node_env:  "production"
		}
	}
	apiVersion: "v1alpha1"
	name:       "demo-app-dev"
}

file: demo-app.cue

bundle: {
	instances: {
		"demo-app": {
			module: {
				url: "file:///Users/user/modules/demo-app"
			}

			namespace: _defaults.namespace
			values: {
				spot: _defaults.spot
				if _env == "prd" {
					replicas: 3
				}
				image: {
					if _env == "dev" {
						repository: "us-central1-docker.pkg.dev/hailtrace-host-project/hailtrace-dev/demo-app"
						tag:        "7fb3568"
					}
					if _env == "prd" {
						repository: "us-central1-docker.pkg.dev/hailtrace-host-project/hailtrace-prd/demo-app"
						tag:        "7fb3568"
					}
				}
				containers: {
					ports: [{
						containerPort: 3000
					}]
					env: [{
						name:  "NODE_ENV"
						value: _defaults.node_env
					}]
				}
				resources: {
					requests: {
						cpu:    "250m"
						memory: "512Mi"
					}
					limits: {
						cpu:    "250m"
						memory: "512Mi"
					}
				}
				verticalPodAutoscaler: enabled: true
				horizontalPodAutoscaler: enabled: false
			}
		}
	}
}

Issue
when building bundle timoni bundle build -f _defaults.cue -f browser-app.cue --runtime-from-env will return error

2:05PM ERR failed to build bundle:
bundle.instances."demo-app".namespace: reference "_defaults" not found:
    ./0.browser-app.cue.cue:10:15

if you manually merge file e.g

bundle: {
    _env:     string @timoni(runtime:string:ENV)
	_defaults: {
		namespace: "demo-app"
		if _env == "dev" {
		    spot:      true
			node_env:  "development"
		}
		if _env == "prd" {
		    spot:      false
			node_env:  "production"
		}
	}
	apiVersion: "v1alpha1"
	name:       "demo-app-dev"
	instances: {
		"demo-app": {......

build works as expected.

I found workaround , if using full path namespace: bundle._defaults.namespace instead of namespace: _defaults.namespace it allows to build the bundle as expected. Not sure if this is expected behavior.