Module: Rib::Runner

Defined in:
lib/rib/runner.rb

Class Method Summary collapse

Class Method Details

.command_descriptions ⇒ Object 



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# File 'lib/rib/runner.rb', line 51

def command_descriptions
  @command_descriptions ||=
  {'all'    => 'Load all recommended plugins'                ,
   'min'    => 'Run the minimum essence'                     ,
   'auto'   => 'Run as Rails or Ramaze console (auto-detect)',
   'rails'  => 'Run as Rails console'                        ,
   'ramaze' => 'Run as Ramaze console'                       ,
   'rack'   => 'Run as Rack console'                         }
end

.command_descriptions_find(path) ⇒ Object

Extract the text below __END__ in the bin file as the description



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# File 'lib/rib/runner.rb', line 62

def command_descriptions_find path
  File.read(path) =~ /Gem\.bin_path\(['"](.+)['"], ['"](.+)['"],/
  (File.read(Gem.bin_path($1, $2))[/\n__END__\n(.+)$/m, 1] || '').strip
end

.command_paths ⇒ Object 



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# File 'lib/rib/runner.rb', line 41

def command_paths
  @command_paths ||=
  Gem.path.map{ |path|
    Dir["#{path}/bin/*"].map{ |f|
      (File.executable?(f) && File.basename(f) =~ /^rib\-.+$/ && f) ||
       nil    # a trick to make false to be nil and then
    }.compact # this compact could eliminate them
  }.flatten
end

.commands ⇒ Object 



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# File 'lib/rib/runner.rb', line 33

def commands
   @commands ||=
    command_paths.map{ |path|
      name = File.basename(path)[/^rib\-(.+)$/, 1]
      [name, command_descriptions[name]      ||
             command_descriptions_find(path) || ' '] }
end

.help ⇒ Object 



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# File 'lib/rib/runner.rb', line 151

def help
  optt = options.transpose
  maxn = optt.first.map(&:size).max
  maxd = optt.last .map(&:size).max
  "Usage: #{Rib.config[:name]}"                    \
  " [ruby OPTIONS] [rib OPTIONS] [rib COMMANDS]\n" +
  options.map{ |(name, desc)|
    if name.end_with?(':')
      name
    else
      sprintf("  %-*s  %-*s", maxn, name, maxd, desc)
    end
  }.join("\n")
end

.load_command(command) ⇒ Object 



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# File 'lib/rib/runner.rb', line 166

def load_command command
  bin  = "rib-#{command}"
  path = which_bin(bin)
  if path == ''
    Rib.warn(
      "Can't find #{bin} in $PATH. Please make sure it is installed,",
      "or is there any typo? You can try this to install it:\n"      ,
      "    gem install #{bin}")
  else
    Rib.config[:name] = bin
    load(path)
  end
end

.loop(retry_times = 5) ⇒ Object 



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# File 'lib/rib/runner.rb', line 80

def loop retry_times=5
  Rib.shell.loop
rescue => e
  if retry_times <= 0
    Rib.warn("Error: #{e}. Too many retries, give up.")
  elsif Rib.shells.last.running?
    Rib.warn("Error: #{e}. Relaunching a new shell... ##{retry_times}")
    Rib.warn("Backtrace: #{e.backtrace}") if $VERBOSE
    Rib.shells.pop
    Rib.shells << Rib::Shell.new(Rib.config)
    retry_times -= 1
    retry
  else
    Rib.warn("Error: #{e}. Closing.")
    Rib.warn("Backtrace: #{e.backtrace}") if $VERBOSE
  end
end

.options ⇒ Object 



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# File 'lib/rib/runner.rb', line 6

def options
  @options ||=
  [['ruby options:'    , ''                                        ],
   ['-e, --eval LINE'                                               ,
    'Evaluate a LINE of code'                                      ],

   ['-d, --debug'                                                   ,
    'Set debugging flags (set $DEBUG to true)'                     ],

   ['-w, --warn'                                                    ,
     'Turn warnings on (set $-w and $VERBOSE to true)'             ],

   ['-I, --include PATH'                                            ,
     'Specify $LOAD_PATH (may be used more than once)'             ],

   ['-r, --require LIBRARY'                                         ,
     'Require the library, before executing your script'           ],

   ['rib options:'     , ''                                        ],
   ['-c, --config FILE', 'Load config from FILE'                   ],
   ['-n, --no-config'  , 'Suppress loading ~/.config/rib/config.rb'],
   ['-h, --help'       , 'Print this message'                      ],
   ['-v, --version'    , 'Print the version'                       ]] +

  [['rib commands:'    , '']] + commands
end

.parse(argv) ⇒ Object 



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# File 'lib/rib/runner.rb', line 98

def parse argv
  unused = []
  until argv.empty?
    case arg = argv.shift
    when /^-e=?(.+)?/, /^--eval=?(.+)?/
      Rib.shell.eval_binding.eval(
        $1 || argv.shift || '', __FILE__, __LINE__)

    when /^-d/, '--debug'
      $DEBUG = true
      parse_next(argv, arg)

    when /^-w/, '--warn'
      $-w, $VERBOSE = true, true
      parse_next(argv, arg)

    when /^-I=?(.+)?/, /^--include=?(.+)?/
      paths = ($1 || argv.shift).split(':')
      $LOAD_PATH.unshift(*paths)

    when /^-r=?(.+)?/, /^--require=?(.+)?/
      require($1 || argv.shift)

    when /^-c=?(.+)?/, /^--config=?(.+)?/
      Rib.config[:config] = $1 || argv.shift

    when /^-n/, '--no-config'
      Rib.config.delete(:config)
      parse_next(argv, arg)

    when /^-h/, '--help'
      puts(help)
      exit

    when /^-v/, '--version'
      require 'rib/version'
      puts(Rib::VERSION)
      exit

    when /^[^-]/
      load_command(arg)

    else
      unused << arg
    end
  end
  unused
end

.parse_next(argv, arg) ⇒ Object 



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# File 'lib/rib/runner.rb', line 147

def parse_next argv, arg
  argv.unshift("-#{arg[2..-1]}") if arg.size > 2
end

.run(argv = ARGV) ⇒ Object 



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# File 'lib/rib/runner.rb', line 67

def run argv=ARGV
  (@running_commands ||= []) << Rib.config[:name]
  unused = parse(argv)
  # if it's running a Rib command, the loop would be inside Rib itself
  # so here we only parse args for the command
  return if @running_commands.pop != 'rib'
  # by coming to this line, it means now we're running Rib main loop,
  # not any other Rib command
  Rib.warn("Unused arguments: #{unused.inspect}") unless unused.empty?
  require 'rib/core' if Rib.config.delete(:mimic_irb)
  loop
end

.which_bin(bin) ⇒ Object

handle windows here



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# File 'lib/rib/runner.rb', line 180

def which_bin bin # handle windows here
  `which #{bin}`.strip
rescue Errno::ENOENT # probably a windows platform, try where
  `where #{bin}`.lines.first.strip
end