Class: Cmdlib::App

Inherits:
Object
  • Object
show all
Defined in:
lib/cmdlib/application.rb

Overview

Class edscribe CLI application (TOP class).

Constant Summary collapse

OPTION_PREFIX_SHORT = 
'-'
OPTION_PREFIX_LONG = 
'--'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(appname) ⇒ App

Returns a new instance of App.



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# File 'lib/cmdlib/application.rb', line 13

def initialize ( appname )
  @name  = appname
  @about = []
  @usage = []
  @commands = []
  @options = {}
  @default = nil
  @version = '0.1.1'
  
  addopt Option.new( 'V', 'version', 'Display application version.' )
end

Instance Attribute Details

#about ⇒ Object

This array contain information to use application.



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# File 'lib/cmdlib/application.rb', line 8

def about
  @about
end

#commands ⇒ Object

Version string (will be display to -v or –version).



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# File 'lib/cmdlib/application.rb', line 11

def commands
  @commands
end

#name ⇒ Object

This array contain information to use application.



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# File 'lib/cmdlib/application.rb', line 8

def name
  @name
end

#options ⇒ Object

Version string (will be display to -v or –version).



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# File 'lib/cmdlib/application.rb', line 11

def options
  @options
end

#usage ⇒ Object

This array contain information to use application.



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# File 'lib/cmdlib/application.rb', line 8

def usage
  @usage
end

#version ⇒ Object

Version string (will be display to -v or –version).



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# File 'lib/cmdlib/application.rb', line 11

def version
  @version
end

Instance Method Details

#addcmd(cmd) ⇒ Object

Add CLICommand object to CLIHandler.

Raises:

  • (TypeError) 


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# File 'lib/cmdlib/application.rb', line 27

def addcmd ( cmd )
  raise TypeError, 'Incorrectly types for command object.' unless
  cmd.is_a? Cmdlib::Command

  @commands << cmd
end

#addopt(opt) ⇒ Object

Add CLICommand object to CLIHandler.

Raises:

  • (TypeError) 


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# File 'lib/cmdlib/application.rb', line 36

def addopt ( opt )
  raise TypeError, 'Incorrectly types for option object.' unless
  opt.instance_of? Cmdlib::Option

  @options[opt.longname.to_sym] = opt
end

#command_search(cmdlist, cmd) ⇒ Object

Search command in command list. Return command object if search success, else return nil. cmdlist – array with command objects. cmd – string with command name from ARGV.



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# File 'lib/cmdlib/application.rb', line 218

def command_search( cmdlist, cmd )
  cmdlist.each do |c|
  c.init
  return c if c.name == cmd
  end
  return nil
end

#command_select ⇒ Object

Select and return command object in application.



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# File 'lib/cmdlib/application.rb', line 228

def command_select
  command = command_search( @commands, ARGV[0] )
  if command != nil then
    # remove command name from ARGV and search next.

    ARGV.delete_at( 0 )
    ARGV.each do |arg|
    cmd = command_search( command.subcmd, arg )
    break if cmd == nil
    ARGV.delete_at( 0 )
    command = cmd
    end
  end
  return command
end

#default(cmd) ⇒ Object

Default command for run without arguments.

Raises:

  • (TypeError) 


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# File 'lib/cmdlib/application.rb', line 45

def default ( cmd )
  raise TypeError, 'Incorrectly types for command object.' unless
  cmd.is_a? Cmdlib::Command
  
  @default = cmd
end

#display_commands(cmdlist) ⇒ Object

Display commands info



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# File 'lib/cmdlib/application.rb', line 54

def display_commands( cmdlist )
  maxlen = 0
  cmdlist.each do |cmd|
  maxlen = cmd.name.length if cmd.name.length > maxlen
  end
  cmdlist.each do |cmd|
  print '  ' + cmd.name
  print "#{' ' * (maxlen - cmd.name.length)}  # "
  puts cmd.brief
  end
end

#display_options(optlist) ⇒ Object

Display options info



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# File 'lib/cmdlib/application.rb', line 68

def display_options( optlist )
  maxlen = 0
  listout = []
  optlist.each_value do |opt|
  optnames = ''
  if opt.shortname.length == 0
      optnames += '  ' 
  else
    optnames += OPTION_PREFIX_SHORT + opt.shortname
  end
  optnames += ','
  optnames += OPTION_PREFIX_LONG + opt.longname if opt.longname.length != 0
  optnames += '=[...]' if opt.param == true
  listout << { :n => optnames, :b => opt.brief }
  maxlen = optnames.length if optnames.length > maxlen
  end
  listout.each do |opt|
  print '  ' + opt[:n]
  print "#{' ' * (maxlen - opt[:n].length)}  # "
  puts opt[:b]
  end
end

#getopt(opt) ⇒ Object

Check input arguments on equal option syntax. if success return option { :n => <argument name>, :t => <option type> }, else return ” in all fields.



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# File 'lib/cmdlib/application.rb', line 247

def getopt ( opt )
  result = { :n => '', :t => '', }
  if opt.length > OPTION_PREFIX_LONG.length then
    if opt[0, OPTION_PREFIX_LONG.length] == OPTION_PREFIX_LONG then
      result[:n] = opt[OPTION_PREFIX_LONG.length, opt.length]
      result[:t] = OPTION_PREFIX_LONG
      return result
    end
  end
  if opt.length > OPTION_PREFIX_SHORT.length then
    if opt[0, OPTION_PREFIX_SHORT.length] == OPTION_PREFIX_SHORT then
      result[:n] = opt[OPTION_PREFIX_SHORT.length, opt.length]
      result[:t] = OPTION_PREFIX_SHORT
      return result 
    end
  end
  return result
end

#option_compare(opt_form, opt_app) ⇒ Object

Compare parsing option (form by getopt) with application option. Return true if options is equal, else return false. opt_form – object formed by getopt. opt_app – application option object.



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# File 'lib/cmdlib/application.rb', line 283

def option_compare ( opt_form, opt_app )
  case opt_form[:t]
  when OPTION_PREFIX_SHORT
    return true if opt_form[:n][0, opt_app.shortname.length] == opt_app.shortname
  when OPTION_PREFIX_LONG
  return true if opt_form[:n].split('=')[0] == opt_app.longname
  end
  return false
end

#option_excess ⇒ Object

Check ARGV to exess options.



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# File 'lib/cmdlib/application.rb', line 268

def option_excess
  ARGV.each do |opt|
  o = getopt( opt )
  if o[:n] != '' then
    puts "fatal error: unknown option '#{o[:t]}#{o[:n]}'"
    exit
  end
  end
end

#option_parser(optlist) ⇒ Object

Parsing options in command line.



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# File 'lib/cmdlib/application.rb', line 345

def option_parser( optlist )
  return if optlist.size == 0
  deletelist = []
  # search option in argument list.

  ARGV.each_with_index do |opt,i|
  o = getopt( opt )
  if o[:n] != '' and o[:n] != 'h' and o[:n] != 'help'
    o[:i] = i
    # Search in application list

    result = option_search( o, optlist )
    if result != nil then
 deletelist << opt
 result = option_set( o, optlist[result] )
 deletelist << result if result != ''
    end
  end
  end
  # delete option from ARGV.

  deletelist.each do |n|
  ARGV.delete( n )
  end
end

#option_search(option, options) ⇒ Object

Search option in application options. Return option key-name if option found, else return nil. option – object formed by getopt. options – options object list.



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# File 'lib/cmdlib/application.rb', line 298

def option_search( option, options )
  # Search in global options list

  options.each_value do |opt|
    return opt.longname.to_sym if option_compare( option, opt )
  end
  return nil
end

#option_set(opt_form, opt_app) ⇒ Object

Set application option object. opt_form – object formed by getopt. opt_app – application option object. Return delete name in ARGV or ”.



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# File 'lib/cmdlib/application.rb', line 311

def option_set ( opt_form, opt_app )
  if opt_app.param then
  # option parameter buit-in option name by '='

  if opt_form[:n].include? '=' then
    opt_app.value = opt_form[:n].split('=')[-1]
    return ''
  end
  # option parameter buit-in option name

  if opt_form[:t] == OPTION_PREFIX_SHORT and
opt_form[:n].length > opt_app.shortname.length then
    opt_app.value = opt_form[:n][opt_app.shortname.length, opt_form[:n].length - opt_app.shortname.length]
    return ''
  end
  # option parameter present in next ARGV.

  if opt_form[:i].next >= ARGV.size then
      puts "fatal error: unable to find argument for option '#{opt_form[:n]}'."
      exit
  end
  # if next argument is a option.

  arg = ARGV[opt_form[:i].next]
    if getopt( arg )[:n] != '' then
      puts "fatal error: miss argument for option '#{opt_form[:t]}#{opt_form[:n]}'."
      exit
    end
  opt_app.value = arg
  return arg
  else
  opt_app.value = true
  end
  return ''
end

#run ⇒ Object

Main method to run application.



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# File 'lib/cmdlib/application.rb', line 93

def run
  option_parser @options
  
  # Check on include version request.

  if @options[:version].value then
  puts "#{@name}, version #{@version}"
  exit
  end

  # Check on include help request.

  if ARGV[0] == 'help' or ARGV[0] == '--help' or ARGV[0] == '-h' then
  # Help arguments apsent, well then display information about application.

  if ARGV.size == 1 then
    puts
    puts "*** #{@name} ***".center(80)
    # Display about info.

    if @about.size > 0 then
 puts '** ABOUT:'
 @about.each do |line|
   puts "  #{line}"
 end
    end
    # Display usage info.

    if @usage.size > 0 then
 puts
 puts '** USAGE:'
 @usage.each do |line|
   puts "  #{line}"
 end
    end
    # Display options info.

    puts
    puts '** OPTIONS:'
    display_options @options
    # Display commands info

    if @commands.size > 0 then
 @commands.each do |c| c.init end
 puts
 puts '** COMMANDS:'
 display_commands @commands
 puts
 puts "For details, type: help [COMMAND]"
    end
    puts
  # Help arguments exist, find command in application command list.

  else
    ARGV.delete_at( 0 )
    cmd = command_select
    if ARGV.size != 0 then
 puts "fatal error: unknown command '#{ARGV[0]}'"
 exit
    end
    # Display describe information on command.

    puts
    puts Cmdlib::Describe.outtitle( cmd.name )
    puts "  #{cmd.brief}"
    if cmd.details.size > 0 then
 puts
 puts '** DETAILS:'
 cmd.details.each do |e|
   puts "  #{e}"
 end
    end
    if cmd.example.size > 0 then
 puts
 puts '** EXAMPLE:'
 cmd.example.each do |e|
   puts "  #{e}"
 end
    end
    # Display options info.

    if cmd.options.size > 0 then
 puts
 puts '** OPTIONS:'   
 display_options cmd.options
    end
    # Display commands info.

    if cmd.subcmd.size > 0 then
 cmd.subcmd.each do |c| c.init end
 puts
 puts '** SUBCOMMANDS:'
 display_commands cmd.subcmd
 puts
 puts "For details, type: help #{cmd.name} [SUBCOMMAND]"
    end
    puts
  end
  exit
  end
  
  # Handling default command (if exist her).

  if @default != nil then
  option_excess
  if ARGV.size < @default.argnum then
    puts "fatal error: to few arguments for programm, use <help>."
  else
    @default.handler( @options, ARGV )
  end
  exit
  end
  
  # Handling commands.

  cmd = command_select
  if cmd == nil then
  puts "fatal error: unknown command or command miss, use <help>."
  exit
  end
  if ARGV.size < cmd.argnum then
  puts "fatal error: to few arguments for command, use: <help> <command name>."
  exit
  end
  # Scaning options fir this command

  option_parser cmd.options
  option_excess
  #cmd.init

  cmd.handler( @options, ARGV )
  exit
end