Flag redefined error
When you are doing a command line application in Go and you start to implement test (see: “Test Main Function”), you might observe errors indicating command line flags being redefined.
I have observed this for --verbose, when my application: stevedore implements a --verbose flag. And the reason seems to be that go test also supports --verbose
The fix is easy, I located this recipe from a blog post by Max Chadwick: “Preventing Flag Conflicts in Go”.
The solution is to add:
flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
Do see the post by Max for a more explicit explanation.