Unknown option when alias begins with other alias

[arichiardi]

Hi there!

I have the following :spec:

:verbose {:desc "Enable verbose output." :alias :v}
   :very-verbose {:desc "Enable very verbose output." :alias :vv}

That when I cli/parse-args returns the unknown option error (via the :error-fn):

{:spec {:verbose {:desc "Enable verbose output.", :alias :v}
        :very-verbosd {:desc "Enable very verbose output.", :alias :vv}}
 :type :org.babashka/cli, :cause :restrict, :msg "Unknown option:" :e
 :restrict #{:check :verbose :fix :very-verbosd}, :option :e}

I could reproduce it only when :vv is used as :alias.

Using bb --version babashka v1.3.186.

[borkdude]

Can you please post a full repro, not just some fragments? I'm not sure how to reproduce your problem. What arguments are you parsing for example.

[borkdude]

I assume that this is your full repro:

(require '[babashka.cli :as cli] :reload)

(prn
 (cli/parse-opts
  ["-vv"]
  {:spec {:verbose {:desc "Enable verbose output.", :alias :v}
          :very-verbosd {:desc "Enable very verbose output.", :alias :vv}}
   :closed true}))

[borkdude]

One way to allow multiple aliases to be used is this:

(prn
 (cli/parse-opts
  ["-vv"]
  {:spec {:verbose {:coerce []
                    :desc "Enable verbose output.", :alias :v}}
   :closed true}))

which results into this:

{:verbose [true true]}

[borkdude]

I do consider the above as a bug which I'll fix though

[arichiardi]

Just woke up on this side of the world with awesome news thank you! Next time I'll make a repro sorry about that.

[borkdude]

Also released a new bb version. Perhaps it would be good to document that above usage of -vv?

[arichiardi]

I can do that

[borkdude]

Thanks very much!

[arichiardi]

@borkdude while checking the docs I noticed this

Flags may be combined into a single short option (since 0.7.51):

(cli/parse-opts ["-abc"])
;;=> {:a true :b true :c true}

And I was wondering if the following is also a (smaller) bug:

 (prn (cli/parse-opts ["-vvv"]))           
 {:v true}

I can change the docs to say that only "single letter" flags behave that way. Thoughts?

[borkdude]

Yes, only single letter flags behave that way, it's UNIX convention I believe. But if you add {:spec {:v {:coerce []}}} the booleans will be collected in a vector instead of overwritten, which is the way you should use it for your purpose.