› kube_ctl › Source › Kube › CLI

module CLI

Definitions

def self.register(name, handler, description: nil)

Register a subcommand.

Kube::CLI.register("cluster", handler)

+name+ - the subcommand name (String) +handler+ - any object that responds to .call(argv) where argv is the remaining ARGV after the subcommand +description+ - short one-line description for help output

Implementation

 
def self.register(name, handler, description: nil)
  @commands[name.to_s] = { handler: handler, description: description }
end

def self.lookup(name)

Look up a registered subcommand handler by name.

Implementation

 
def self.lookup(name)
  entry = @commands[name.to_s]
  entry&.fetch(:handler)
end

def self.commands

All registered command names.

Implementation

 
def self.commands
  @commands.dup
end

def self.run(argv = ARGV)

Run the CLI. Parses the first argument as the subcommand, passes the rest to the handler.

Implementation

 
def self.run(argv = ARGV)
  subcommand = argv.shift

  if subcommand.nil? || subcommand == "help" || subcommand == "--help" || subcommand == "-h"
    print_help
    return
  end

  handler = lookup(subcommand)

  if handler.nil?
    $stderr.puts "kube: unknown command '#{subcommand}'"
    $stderr.puts
    print_help($stderr)
    exit 1
  end

  handler.call(argv)
end