func run --build should prompt for registry details on first run

[zedalaye]

In this page : https://knative.dev/docs/getting-started/build-run-deploy-func/ at [kn ] func run step :

Expected Behavior

The function is built/deployed/run as expected

Actual Behavior

Experiments/knative/hello via 🐹 v1.25.4
❯ kn func run --build
Building function image
Error: registry required
Error: exit status 1

Experiments/knative/hello via 🐹 v1.25.4
❯ kn func run
Building function image
Error: registry required
Error: exit status 1

Steps to Reproduce the Problem

2. I downloaded the dependencies (kind, kn, kn-quickstart, kn-func)
3. Cluster has been created using kn quickstart kind
4. Create the sample function and run kn func run

I also tried to rebuild the quickstart cluster with the --registry option and the results are the same:

❯ docker ps
CONTAINER ID   IMAGE                  COMMAND                  CREATED          STATUS          PORTS                                              NAMES
25db8df61e3a   registry:2             "/entrypoint.sh /etc…"   16 minutes ago   Up 16 minutes   0.0.0.0:5001->5000/tcp                             kind-registry
7b6b9c99f1ae   kindest/node:v1.32.0   "/usr/local/bin/entr…"   17 minutes ago   Up 17 minutes   127.0.0.1:41717->6443/tcp, 0.0.0.0:80->31080/tcp   knative-control-plane

Additional Info

Additional context

I'm on Windows with WSL2, docker is installed using Docker Desktop for windows. $
Everything works as expected in WSL2

Install information:

• Platform (GKE, IKS, AKS, etc.): ?
• Knative Version: 1.20.0

[dprotaso]

FWIW - it seems like you need to run func build first and then func run.

Though I see a point that since you've passed func run --build that it should do the registry prompt in that flow

[dprotaso]

Moving this to the func repo

[dprotaso]

/assign @gauron99 @matejvasek for triage

[knative-prow]

@dprotaso: GitHub didn't allow me to assign the following users: for, triage.

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In response to this:

/assign @gauron99 @matejvasek for triage

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[dprotaso]

I'll subsequently update the docs

[dprotaso]

Actually the docs say to use the --registry under the func tab but not the kn func tab. I'll pull that out into a common place.

[dprotaso]

Note this issue remains that on first run --build if the registry isn't set it should prompt

[dprotaso]

docs PR is here: knative/docs#6510

this updates the kn func flow to suggest the --registry flag if you haven't built before