Class: Simple::CLI::Runner::CommandHelp

Inherits:
Object
  • Object
show all
Defined in:
lib/simple/cli/runner/command_help.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mod, method_id) ⇒ CommandHelp

Returns a new instance of CommandHelp.

Raises:

  • (ArgumentError) 


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# File 'lib/simple/cli/runner/command_help.rb', line 14

def initialize(mod, method_id)
  raise(ArgumentError, "#{method_id.inspect} should be a Symbol") unless method_id.is_a?(Symbol)

  @method_id            = method_id
  @method               = mod.instance_method(@method_id)
  @method_parameters_ex = mod.method_parameters_ex(@method_id)
end

Class Method Details

.option_names(app, subcommand) ⇒ Object 



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# File 'lib/simple/cli/runner/command_help.rb', line 8

def self.option_names(app, subcommand)
  new(app, subcommand).option_names
rescue NameError
  []
end

Instance Method Details

#full ⇒ Object

Full help as read from the method comments



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# File 'lib/simple/cli/runner/command_help.rb', line 28

def full
  comments.join("\n") if comments.first
end

#head ⇒ Object

First line of the help as read from the method comments.



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# File 'lib/simple/cli/runner/command_help.rb', line 23

def head
  comments.first
end

#interface(binary_name, command_name) ⇒ Object

A help string constructed from the commands method signature.



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# File 'lib/simple/cli/runner/command_help.rb', line 46

def interface(binary_name, command_name)
  args = @method_parameters_ex.map do |mode, name|
    case mode
    when :req   then "<#{name}>"
    when :opt   then "[ <#{name}> ]"
    when :rest  then "[ <#{name}> .. ]"
    end
  end.compact

  options = @method_parameters_ex.map do |mode, name, default_value|
    case mode
    when :key     then
      case default_value
      when false  then  "[ --#{name} ]"
      when true   then  "[ --no-#{name} ]"
      when nil    then  "[ --#{name}=<#{name}> ]"
      else              "[ --#{name}=#{default_value} ]"
      end
    when :keyreq  then
      "--#{name}=<#{name}>"
    end
  end.compact

  help = "#{binary_name} #{command_to_string(command_name)}"
  help << " #{options.join(' ')}" unless options.empty?
  help << " #{args.join(' ')}" unless args.empty?
  help
end

#option_names ⇒ Object 



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# File 'lib/simple/cli/runner/command_help.rb', line 32

def option_names
  option_names = @method_parameters_ex.map do |mode, name, _|
    case mode
    when :key     then name
    when :keyreq  then name
    end
  end.compact

  option_names.map do |name|
    ["--#{name}", "--#{name}="]
  end.flatten
end