Short option only with tools.cli

According to clojure.tools.cli/parse-opts document, options are a sequence of vectors.

To use short option for non-boolean case, like git -C <repo-directory>, we need to define options like below.

• The second positional parameter should be nil as the option only has short form.
• The :required must be set. Otherwise, the option will be taken as boolean one. The value of this property will be showed just after the short flag, like -C <required value or long form spec> <description>, so here using empty as placeholder.
• The :id should be set. The property is used to retrieve value from parsed opts, like (:dir opts)
• If there is a default value for this option and we don\'t want show the default value in the help info, set :default-desc to empty string to omit it.

  (def ^:private cli-options
    [["-C" nil "Specify repository directory (default pwd)"
      :id :dir
      :default pwd
      :default-desc ""
      :required ""]])
  

Published: 2023-10-02

Tagged: clojure