[Feature] vela cli uses namespace from kubeconfig if env not set

[Kolossi]

If vela env set has not been used, and a vela command requiring a namespace is used without specifying namespace, then use the namespace from the current KUBECONFIG rather than default.

Example commands would include:

• vela status
• vela up
• vela list
• ... or any other command which accepts -n | --namesapce

Current behaviour:

$ kubectl config view --minify -o jsonpath='{.contexts[?(@.name == "'$(kubectl config view -o=jsonpath='{.current-context}')'")].context.namespace}'
my-namespace

$ kubeconfig get application
NAME                COMPONENT               TYPE           PHASE              HEALTHY   STATUS      AGE
my.app              my.app.component        webservice     workflowSucceeded  true      Ready:1/1   44h

$ vela list my.app
APP     COMPONENT       TYPE    TRAITS  PHASE   HEALTHY STATUS  CREATED-TIME

$ vela status my.app
Error: failed to load application my.app from namespace default: applications.core.oam.dev "my.app" not found

Desired behaviour:

$ kubectl config view --minify -o jsonpath='{.contexts[?(@.name == "'$(kubectl config view -o=jsonpath='{.current-context}')'")].context.namespace}'
my-namespace

$ kubeconfig get application
NAME                COMPONENT               TYPE           PHASE              HEALTHY   STATUS      AGE
my.app              my.app.component        webservice     workflowSucceeded  true      Ready:1/1   44h

$ vela list my.app
APP     COMPONENT         TYPE        TRAITS   PHASE               HEALTHY  STATUS     CREATED-TIME
my.app  my.app.component  webservice  gateway  workflowSucceeded   healthy  Ready:1/1  2022-11-22 16:44:15 +0000 GMT

$ vela status my.app
{status output...}

(vela list and vela status find app in kubeconfig current namespace my-namespace)

Initially discussed with @wonderflow and @FogDong in this slack thread

[PratikforCoding]

can you provide some resources to go though and get some hints to resolve this?

[Kolossi]

can you provide some resources to go though and get some hints to resolve this?

@PratikforCoding is that targetted at me? I'm afraid I don't know how to resolve it, I've nothing else I can add aside the repro in my OP.