ko run fails when there is a ko flag

[paivagustavo]

Since the ko run forwards every argument starting from the second argument to the kubectl run command, if there is a ko flag like --preserve-import-paths this will be forwarded to the kubectl run.

The command ./ko run test --preserve-import-paths --image=./test/ results in the following error:

....
Usage:
  kubectl run NAME --image=image [--env="key=value"] [--port=port] [--replicas=replicas] [--dry-run=bool] [--overrides=inline-json] [--command] -- [COMMAND] [args...] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).

unknown flag: --preserve-import-paths
2019/01/14 21:15:08 error executing "kubectl run": exit status 1

Suggestion:

I think we should do something similar to the docker run command, where any flag passed before the run is considered a flag of the docker run and flags passed after the run are flags of the container to be executed.