Don't support running multiple KCLRun simultaneously

[jianzs]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

I've written two KCLRun objects in a single YAML file. When I run kubectl kcl run, I encounter an error.

$ kubectl kcl run -f ./bug.yml 
panic: runtime error: index out of range [2] with length 1

goroutine 1 [running]:
kcl-lang.io/krm-kcl/pkg/kio.Filter.Filter({0x140008e3880}, {0x14000121d70, 0x3, 0x3})
        kcl-lang.io/krm-kcl@v0.4.2-0.20231011034337-d2338c4e1083/pkg/kio/filter.go:31 +0x180
sigs.k8s.io/kustomize/kyaml/kio.Pipeline.ExecuteWithCallback({{0x14000b9fc58, 0x1, 0x1}, {0x14000b9fc48, 0x1, 0x1}, {0x14000b9fc38, 0x1, 0x1}, 0x0}, ...)
        sigs.k8s.io/kustomize/kyaml@v0.14.3/kio/kio.go:137 +0x24c
sigs.k8s.io/kustomize/kyaml/kio.Pipeline.Execute({{0x1400093fc58, 0x1, 0x1}, {0x1400093fc48, 0x1, 0x1}, {0x1400093fc38, 0x1, 0x1}, 0x0})
        sigs.k8s.io/kustomize/kyaml@v0.14.3/kio/kio.go:104 +0x6c
kcl-lang.io/kubectl-kcl/pkg/options.(*RunOptions).Run(0x0?)
        kcl-lang.io/kubectl-kcl/pkg/options/run.go:35 +0x184
kcl-lang.io/kubectl-kcl/cmd.NewRunCmd.func1(0x14000abc600, {0x1017aacc5, 0x2, 0x2})
        kcl-lang.io/kubectl-kcl/cmd/run.go:19 +0x20
github.com/spf13/cobra.(*Command).execute(0x14000abc600, {0x14000ab9160, 0x2, 0x2})
        github.com/spf13/cobra@v1.7.0/command.go:940 +0x5c8
github.com/spf13/cobra.(*Command).ExecuteC(0x14000abc000)
        github.com/spf13/cobra@v1.7.0/command.go:1068 +0x35c
github.com/spf13/cobra.(*Command).Execute(0x101d5f520?)
        github.com/spf13/cobra@v1.7.0/command.go:992 +0x1c
main.main()
        kcl-lang.io/kubectl-kcl/main.go:10 +0x20

However, if I run each object separately, it works fine. But the result includes two annotations for each object that KCL added itself:

annotations:
    config.kubernetes.io/index: '0'
    internal.config.kubernetes.io/index: '0'

This is the yaml including two KCLRun object.

apiVersion: v1
kind: Service
metadata:
  name: default-domain-service
  namespace: knative-serving
spec:
  clusterIP: None
  selector:
    app: default-domain
  ports:
    - name: http
      port: 80
      targetPort: 8080
  type: ClusterIP
---
apiVersion: krm.kcl.dev/v1alpha1
kind: KCLRun
metadata:
  name: change-service-type
spec:
  params:
    annotations:
      managed-by: kubectl-kcl
  source: |
    [item | {
      if item.kind == "Service":
          spec.type = "LoadBalance"
    } for item in option("items")]
---
apiVersion: krm.kcl.dev/v1alpha1
kind: KCLRun
metadata:
  name: add-labels
spec:
  params:
    annotations:
      managed-by: kubectl-kcl
  source: |
    [item | {
      if item.kind == "Service":
          metadata.labels = {
              app = item.metadata.name
          }
    } for item in option("items")]
---

2. What did you expect to see? (Required)

Get the correct result.

3. What did you see instead (Required)

Encountered an error.

4. What is your KCL components version? (Required)

• kubectl-kcl 0.4.0
• kcl 0.5.3