module Debugger # Implements debugger "help" command. class HelpCommand < Command self.allow_in_control = true # An input line is matched against this regular expression. If we have # a match, run this command. def regexp /^\s* h(?:elp)? (?:\s+(.+))? $/x end # The code that implements this command. def execute if @match[1] args = @match[1].split cmds = @state.commands.select do |cmd| [cmd.help_command].flatten.include?(args[0]) end else args = @match[1] cmds = [] end unless cmds.empty? help = cmds.map{ |cmd| cmd.help(args) }.join help = help.split("\n").map{|l| l.gsub(/^ +/, '')} help.shift if help.first && help.first.empty? help.pop if help.last && help.last.empty? print help.join("\n") else if args and args[0] errmsg "Undefined command: \"#{args[0]}\". Try \"help\"." else print "ruby-debug help v#{Debugger::VERSION}\n" unless self.class.settings[:debuggertesting] print "Type 'help ' for help on a specific command\n\n" print "Available commands:\n" cmds = @state.commands.map{ |cmd| cmd.help_command } cmds = cmds.flatten.uniq.sort print columnize(cmds, self.class.settings[:width]) end end print "\n" end class << self # The command name listed via 'help' def help_command 'help' end # Returns a String given the help description of this command def help(cmd) %{ h[elp]\t\tprint this help h[elp] command\tprint help on command } end end end end