Class: L

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

Defined Under Namespace

Modules: VERSION

Class Method Summary collapse

Class Method Details

.build_command(args) ⇒ Object

Put together command for execution



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# File 'lib/l.rb', line 202

def self.build_command(args)
  command = ['ls']

  if args.length > 0
    if(File.file?(args[0]))
      command << @@file_options
      command[0] = 'less'
    else
      command << @@dir_options
    end
    command << args
  else
    command << @@dir_options
  end  
  command.flatten
end

.clear_options ⇒ Object

reset options lists



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# File 'lib/l.rb', line 43

def self.clear_options
  # used to build filtered command
  @@dir_options = Array.new
  @@file_options = Array.new
end

.init_dir_options(opts) ⇒ Object

Options that are passed on to ls:



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# File 'lib/l.rb', line 66

def self.init_dir_options(opts)
  opts.separator ''      
  opts.separator 'Directory options:'
    
  opts.on('-a', '--all', 'do not ignore entries starting with .') do
    @@dir_options << '-a'
  end
  
  opts.on('-A', '--almost-all', 'do not list implied . and ..') do
    @@dir_options << '-A'
  end

  opts.on('-C', 'list entries by columns') do
    @@dir_options << '-C'
  end

  opts.on("--color=[WHEN]", 
          "control whether color is used to",
          "  distinguish file types. WHEN may be",
          "  'never', 'always', or 'auto'"
          ) do |wh|
    @@dir_options << '--color' + (wh) ? "=#{wh}" : ''
  end
  
  opts.on('-F', '--classify', 'append indicator (one of */=>@|) to entries') do
    @@dir_options << '-F'
  end

  opts.on('--file-type', "likewise, except do not append '*'") do
    @@dir_options << '--file-type'
  end

  # allowed formats for --format
  formats = 
    %w(verbose long commas horizontal across vertical single-column context)
    
  opts.on("--format=WORD", 
          Regexp.new(formats.join('|')),    # only allowed formats
          formats[0..4].join(', '),         # line one of usage
          '  ' + formats[5..-1].join(', ')  # line two of usage
          ) do |wd|
    @@dir_options << "--format=#{wd}"
  end

  opts.on('--inode', 'print the index number of each file') do
    @@dir_options << '-i'
  end

  opts.on("--ignore=PATTERN", 
          'do not list implied entries matching', 
          '  shell PATTERN'
          ) do |pattern|
    @@dir_options << "--ignore=#{pattern}"
  end

  opts.on('-l', 'use long listing format') do
    @@dir_options << '-l'
  end

  opts.on('-r', '--reverse', 'reverse order while sorting') do
    @@dir_options << '-r'
  end
  
  opts.on('-R', '--recursive', 'list subdirectories recursively') do
    @@dir_options << '-R'
  end
  
  opts.on('-t', 'sort by modification time') do
    @@dir_options << '-t'
  end

  opts.on('-v', 'sort by version') do
    @@dir_options << '-v'
  end
  
  opts.on('-1', 'list one file per line') do
    @@dir_options << '-1'
  end

end

.init_file_options(opts) ⇒ Object

Options that are passed on to less:



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# File 'lib/l.rb', line 148

def self.init_file_options(opts)
  opts.separator ''
  opts.separator 'File options:'

  opts.on('-e', '-E', '--quit-at-eof', 
          'quit at end of file') do
    @@file_options << '-e'
  end

  opts.on('-i', 
          'ignore case in searches that do not', 
          '  contain uppercase') do
    @@file_options << '-i'
  end

  opts.on('-I', 'ignore case in all searches') do
    @@file_options << '-I'
  end

  opts.on('--raw-control-chars',
          'output "raw" control characters') do
    @@file_options << '-r'
  end
  
end

.init_general_options(opts) ⇒ Object

Options for l itself:



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# File 'lib/l.rb', line 175

def self.init_general_options(opts)     
  opts.separator ''
  opts.separator 'General options:'

  opts.on('-V', '--version', 'show version info') do
    puts "l version #{L::VERSION::STRING}"
    exit
  end
  
  opts.on_tail('-h', '--help', 'show this message') do
    puts opts
    exit
  end
end

.init_options(args) ⇒ Object

Init options parser



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# File 'lib/l.rb', line 50

def self.init_options(args)  
  clear_options

  @@opts = OptionParser.new(args) do |opts|

    opts.banner = "Usage: l [OPTION]... [FILE/DIRECTORY]..."
    opts.separator 'Displays directory or file contents seamlessly with the'
    opts.separator 'same command (ls and less combined).'
    
    init_dir_options(opts)
    init_file_options(opts)
    init_general_options(opts)
  end
end

.parse(args) ⇒ Object

Run optionsparser, die with a message if error



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# File 'lib/l.rb', line 191

def self.parse(args)
  begin
    @@opts.parse!(args)
  rescue OptionParser::ParseError => e
    warn "l: #{e}"
    warn "Try 'l --help' for more info."
    exit(1)
  end  
end

.run(args = ARGV) ⇒ Object

main entry point



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# File 'lib/l.rb', line 35

def self.run(args = ARGV)
  init_options(args)
  parse(args)
  command = build_command(args)
  system(*command)
end