The command `operator-sdk bundle create --generate-only=true` should check if is in the root of the project when no dir arg is informed

[camilamacedo86]

Bug Report

What did you do?
Run operator-sdk bundle create --generate-only=true outside of the root of the project

What did you expect to see?
The default error saying that it should be executed from the root of the project

What did you see instead? Under which circumstances?

$ operator-sdk bundle create  --generate-only=true
FATA[0000] error generating bundle image files: stat /Users/camilamacedo/go/src/github.com/operator-framework/operator-sdk-samples/go/memcached-operator/deploy/deploy/olm-catalog/deploy/manifests: no such file or directory 

Environment

• operator-sdk version: 0.17
• go version: 1.13

Possible Solution

• Use the func MustInProjectRoot() when the arg --directory is empty.

[camilamacedo86]

/kind bug

[openshift-ci-robot]

@camilamacedo86: The label(s) kind/ cannot be applied, because the repository doesn't have them

In response to this:

/kind bug

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[estroz]

Forcing the invoker to be in the project root only some of the time is bad UX. It would be better to ensure the default directory is stat'd and if it doesn't exist return a helpful error message.

[estroz]

This was actually fixed in #2944.