Class: Archive::Tar::Minitar::Command::CommandHelp

Inherits:

CommandPattern

• Object
• CommandPattern
• Archive::Tar::Minitar::Command::CommandHelp

Defined in:

lib/archive/tar/minitar/command.rb

Instance Method Summary

• #call(args, opts = {}, ioe = {}) ⇒ Object
• #help ⇒ Object
• #name ⇒ Object

Methods inherited from CommandPattern

<<, [], #[], add, command, command?, default_ioe

Instance Method Details

#call(args, opts = {}, ioe = {}) ⇒ Object

# File 'lib/archive/tar/minitar/command.rb', line 312

def call(args, opts = {}, ioe = {})
  ioe = CommandPattern.default_ioe(ioe)

  help_on = args.shift

  if CommandPattern.command?(help_on)
    ioe[:output] << CommandPattern[help_on].help
  elsif help_on == "commands"
    ioe[:output] << <<-EOH
The commands known to minitar are:

minitar create          Creates a new tarfile.
minitar extract         Extracts files from a tarfile.
minitar list            Lists files in the tarfile.

All commands accept the options --verbose and --progress, which are
mutually exclusive. In "minitar list", --progress means the same as
--verbose.

  --verbose, -V     Performs the requested command verbosely.
  --progress, -P    Shows a progress bar, if appropriate, for the action
                being performed.

    EOH
  else
    ioe[:output] << "Unknown command: #{help_on}\n" unless help_on.nil? or help_on.empty?
    ioe[:output] << self.help
  end

  0
end

#help ⇒ Object

# File 'lib/archive/tar/minitar/command.rb', line 344

def help
  help = <<-EOH
This is a basic help message containing pointers to more information on
how to use this command-line tool. Try:

minitar help commands       list all 'minitar' commands
minitar help <COMMAND>      show help on <COMMAND>
                              (e.g., 'minitar help create')
  EOH
end

#name ⇒ Object

# File 'lib/archive/tar/minitar/command.rb', line 308

def name
  "help"
end