Example of my Inquire Gem

inquire.rb

require 'inquire'

# An example of my command-line parsing inquire gem
Inquire.new do
    version '2.0a', switch: '-V'
    app_name 'cURL2'
    author 'Sam'

    switch '-v', '--[no-]verbose', 'Enables (or disables) verbose mode', default: false
    
    flag '-H', '--header=HEADER', 'Add a header field', multi: true
    flag '-p', '--parameter=DATA', 'Adds a parameter to the uri request', multi: true
    flag '-d', '--data=DATA', 'Adds the body for the requst.', required: sub { %w[post put patch].include? @method }

    # Example: `curl2 ping localhost:1234`
    command 'ping', 'Pings a server' do
        positional 'uri', 'The uri to ping.'
    end

    # Example: `curl2 curl localhost:1234 -XPOST --data=whatever`
    command 'curl', 'Sends a normal HTTP request' do
        switch '-X', '--method[=METHOD]', 'Sets the method to use', default: 'get', only: %w(get post put delete patch options)

        positional 'uri', 'The uri to curl.'

        mutualy_exclusive %w[get post put delete patch options custom]
    end

    # Example: `curl2 rest fetch localhost:1234/api/v1 --id=foo`
    command 'rest', 'Sends a REST request' do
        json = Flag.new('-j', '--json[=DATA]', 'Indicates data will be json encoded; optionally sets the data too.') do |data|
            @json = true
            @data = data if data
        end

        id = Flag.new('--id=VALUE', 'The id to use', required: true)

        command 'list', 'List all data.'

        command 'fetch', 'Fetch some data.' do
            flag id
        end

        command 'create', 'Create some data.' do
            flag json
        end

        command 'update', 'Update some data.' do
            flag json
            flag id
        end

        command 'delete', 'Delete some data.' do
            flag id
        end

        positional 'uri', 'The uri to curl.'

        require_one_of %w[list fetch create update delete]
    end
end