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Contents
# frozen_string_literal: true
require_relative "../command"
require_relative "../errors"
module Byebug
#
# Ask for help from byebug's prompt.
#
class HelpCommand < Command
self.allow_in_control = true
self.allow_in_post_mortem = true
def self.regexp
/^\s* h(?:elp)? (?:\s+(\S+))? (?:\s+(\S+))? \s*$/x
end
def self.description
<<-DESCRIPTION
h[elp][ <cmd>[ <subcmd>]]
#{short_description}
help -- prints a summary of all commands
help <cmd> -- prints help on command <cmd>
help <cmd> <subcmd> -- prints help on <cmd>'s subcommand <subcmd>
DESCRIPTION
end
def self.short_description
"Helps you using byebug"
end
def execute
return help_for_all unless @match[1]
return help_for(@match[1], command) unless @match[2]
help_for(@match[2], subcommand)
end
private
def help_for_all
puts(processor.command_list.to_s)
end
def help_for(input, cmd)
raise CommandNotFound.new(input, command) unless cmd
puts(cmd.help)
end
def command
@command ||= processor.command_list.match(@match[1])
end
def subcommand
return unless command
@subcommand ||= command.subcommand_list.match(@match[2])
end
end
end
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